(-1.4*10^ 5 N/cm )• [ ] =? N/mm
Answers
-1.4*10^4 N/mm
Explanation:
-1.4*10^ 5 N/ 1 cm times 1 cm/10 mm =
doing this cancels out the cm and leaves us with mm
-1.4*10^ 5N/10 mm ->
-1.4*10^ 5N ÷ 10 mm ->
-1.4*10^5÷10=
-1.4*10^4 N/mm
N/mm is a unit of torque
torque in a car :
high torque allows a car take off quickly
helps a car go from 0-60 mph in a matter of seconds
kelly blue book
Related Questions
12. Which one of the following is not true about the reaction of: CH3-
CH3+C12...CH3CH2CI+HCI?
a it is elimination reaction
b it is photochemical reaction
c it is chlorination reaction
d it is substitution reaction
Answers
Explanation:
CH₃CH₃ + Cl₂ → CH₃CH₂Cl + HCl
This reaction take place in the presence of light/UV rays. (i.e, photochemical reaction)It's a Chlorination reaction because here there's addition of chlorine.It's a substitution reaction because Cl substituted H from place and attach there.Option which is NOT correct is
Option A (It's not an elimination reaction)
Therefore,
Option A is correct✔
A balloon, inflated in an air conditioned room at 300. K, has a volume of 16.1 L. It is heated to a temperature of 57.0 oC. What is the new volume of the balloon if the pressure remains constant?
Answers
According to the question the new volume of the balloon is 2731.66 L.
What is volume?Volume is the measure o the amount of space a object or material occupies. It is usually measured in liters, cubic meters, gallons, or cubic feet. Volume is an important concept in many fields, including physics, engineering, chemistry, and mathematics. In physics, volume is a measure of the amount of space a body occupies. In engineering, volume is used to determine the size of a tank or reservoir, the capacity of a pipe, or the amount of material needed for a construction project. In mathematics, volume is used to calculate the area of a three-dimensional shape, such as a cube, sphere, or cylinder.
The volume of a gas can be calculated using the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant (8.314 J/mol•K), and T is the absolute temperature.
Since the pressure remains constant, we can rearrange the equation to solve for V: V = nRT/P.
To solve for the new volume, we can plug in the known values:
V = (1 mol)(8.314 J/mol•K)(330.0 K)/(1 atm)
V = 2731.66 J/atm
V = 2731.66 L
Therefore, the new volume of the balloon is 2731.66 L.
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S-L Line
760
L-G Line
LIQUID
PRESSURE OF THE SUBSTANCE mm Hg
380
SOLID
58
GAS
-S-G Line
O'c
100°C
TEMPERATURE OF THE SUBSTANCE
S-L Line: Line showing conditions in which solid
and liquid phases are in equilibrium.
L-GLine: Line showing conditions in which liquid
and gas phases are in equilibrium
S-G Line: Line showing conditions in which solid
and gas phases are in equilibrium
What is the approximate vapor pressure when the gas condenses at 80'C?
200
05
760
430
Answers
What is the molar mass of cholesterol if 0.00105 mol weigh 0.406 g?
Answers
Answer:
387 g/mol
Explanation:
The molar mass is a ratio comparing a substance's mass and molar value. The specific ratio looks like this:
Molar Mass (g/mol) = mass (g) / moles
You can plug the given values into the ratio to find the molar mass.
Molar Mass = mass / moles
Molar Mass = 0.406 g / 0.00105 mol
Molar Mass = 387 g/mol
at neutral ph, both h-indicator and indicator- will co-exist in an equilibrium, so the color will be a mixture of the two.
Answers
At neutral pH, both H-indictor and OH-indicator will co-exist in an equilibrium, so the color will be a mixture of the two.
Acid base indicators are generally weak protolytes that change color in solution according to the pH.
The acid-base equilibrium of a weak acid type of indicator, i.e., H-indicator in water can be expressed as-
HI + H₂O ⇄ H₃O⁺ + I⁻
The acid, HI, and conjugate base, I⁻, have different colors. The equilibrium expression for this process is
K = [I⁻] [H₃O⁺]
[HI]
This can be expressed in logarithmic form :
pH = pK + log [I⁻]
[HI]
Now, from the equation it can be predicted whether the indicator is in its acid or base form depending on the pH.
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ReadWorks
Anna nating Comprehension Guest
5. Which statement best describes the central idea of this passage?
A. In 2004, a tsunami killed thousands of people in South Asia and East Africa.
B. Animals started to behave strangely before the tsunami struck.
C. Many animals survived the tsunami because they sensed it coming
D. Animals have better senses of hearing, smell, and sight than humans do.
Which one?
Answers
What’s the importance of having a vascular system
Answers
Answer:
The vascular system, also called the circulatory system, is made up of the vessels that carry blood and lymph through the body. The arteries and veins carry blood throughout the body, delivering oxygen and nutrients to the body tissues and taking away tissue waste matter.
Explanation:
explain why carbon dioxide levels fluctuate up and down each year, yet have grown steadily through the past 50 years
Answers
Main Answer:Carbon dioxide (CO2) levels fluctuate up and down each year due to natural processes and seasonal variations.
Supporting Question and Answer:
What are the main factors contributing to the steady increase in carbon dioxide (CO2) levels over the past 50 years?
The main factors contributing to the steady increase in CO2 levels over the past 50 years are human activities, particularly the burning of fossil fuels for energy production, transportation, and industrial processes. These activities release significant amounts of CO2 into the atmosphere, which accumulates over time and contributes to the greenhouse effect. While natural fluctuations and seasonal variations occur, the overall upward trend in CO2 levels is primarily driven by human-induced emissions.
Body of the Solution:Carbon dioxide (CO2) levels fluctuate up and down each year due to natural processes and seasonal variations. However, despite these fluctuations, CO2 levels have steadily increased over the past 50 years due to human activities.
1.Natural Fluctuations: Carbon dioxide levels in the atmosphere can vary seasonally due to natural processes. During the spring and summer, when vegetation is actively growing and photosynthesizing, plants absorb CO2 from the atmosphere, causing a decrease in CO2 levels. In contrast, during the fall and winter, when vegetation undergoes decay and decomposition, CO2 is released back into the atmosphere, leading to an increase in CO2 levels.
2.Human Activities: While natural fluctuations occur, the overall increase in CO2 levels over the past 50 years is primarily attributed to human activities, particularly the burning of fossil fuels (such as coal, oil, and natural gas) for energy production, transportation, and industrial processes. These activities release large amounts of CO2 into the atmosphere, contributing to the greenhouse effect and trapping heat in the Earth's atmosphere.
The steady growth of CO2 levels over the past 50 years is a result of the cumulative effect of human emissions outweighing natural processes that absorb or release CO2. This imbalance has led to a continuous rise in atmospheric CO2 concentrations, contributing to global warming and climate change.
Final Answer:The increase in CO2 levels is a global issue, and efforts are being made to reduce greenhouse gas emissions, transition to renewable energy sources, and implement sustainable practices to mitigate the impacts of climate change.
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Carbon dioxide (CO₂) levels fluctuate up and down each year due to natural processes and seasonal variations.
What are the main factors contributing to the steady increase in carbon dioxide (CO₂) levels over the past 50 years?The main factors contributing to the steady increase in CO₂ levels over the past 50 years are human activities, particularly the burning of fossil fuels for energy production, transportation, and industrial processes.
These activities release significant amounts of CO₂ into the atmosphere, which accumulates over time and contributes to the greenhouse effect. While natural fluctuations and seasonal variations occur, the overall upward trend in CO₂ levels is primarily driven by human-induced emissions.
Carbon dioxide (CO₂) levels fluctuate up and down each year due to natural processes and seasonal variations. However, despite these fluctuations, CO₂ levels have steadily increased over the past 50 years due to human activities.
1. Natural Fluctuations: Carbon dioxide levels in the atmosphere can vary seasonally due to natural processes. During the spring and summer, when vegetation is actively growing and photosynthesizing, plants absorb CO₂ from the atmosphere, causing a decrease in CO₂ levels. In contrast, during the fall and winter, when vegetation undergoes decay and decomposition, CO₂ is released back into the atmosphere, leading to an increase in CO₂ levels.
2. Human Activities: While natural fluctuations occur, the overall increase in CO₂ levels over the past 50 years is primarily attributed to human activities, particularly the burning of fossil fuels (such as coal, oil, and natural gas) for energy production, transportation, and industrial processes. These activities release large amounts of CO₂ into the atmosphere, contributing to the greenhouse effect and trapping heat in the Earth's atmosphere.
The steady growth of CO₂ levels over the past 50 years is a result of the cumulative effect of human emissions outweighing natural processes that absorb or release CO₂. This imbalance has led to a continuous rise in atmospheric CO₂ concentrations, contributing to global warming and climate change.
The increase in CO₂ levels is a global issue, and efforts are being made to reduce greenhouse gas emissions, transition to renewable energy sources, and implement sustainable practices to mitigate the impacts of climate change.
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2. A researcher report states that there is a significant difference between treatments
for an independent-measures design with t(28) = 2.27.
a. How many individuals participated in the research study? (Hint: Start with the
dfvalue.)
b. Should the report state that p > .05 or p < .05?
Answers
A researcher conducted an independent-measures study to compare the effectiveness of different treatments. The results showed a significant difference between the treatments, with a t-score of 2.27 and degrees of freedom (df) equal to 28.
a. To determine the number of participants in the research study, we can use the degrees of freedom formula for an independent-measures design: df = (n1 - 1) + (n2 - 1). In this case, df = 28. Let n1 and n2 represent the number of participants in each group, respectively. Since it's an independent-measures design, we can assume that both groups have an equal number of participants. Therefore, we can rewrite the formula as df = 2(n - 1). Plugging in the given df value, we get 28 = 2(n - 1). Solving for n, we find that n = 15. So, there were 15 participants in each group, resulting in a total of 30 participants in the research study.
b. To determine whether the report should state p > .05 or p < .05, we need to consult a t-distribution table or use statistical software to find the p-value associated with the given t-score and df. Generally, a t-score of 2.27 with 28 df would yield a p-value less than .05, indicating that the result is statistically significant. Thus, the report should state that p < .05. This means that there is a significant difference between the treatments being compared in the study.
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ANSWER THIS QUESTION AS QUICK AS YOU CAN YOU WILL GET BRAINLY AND PIONTS PLEASE HELP ASAP!!!!!!!!!!!!!!!!!
Which of the following is NOT true about comparisons between analog and digital signals?
Question 3 options:
Digital signals are pulses of voltage that switch currents on an off in devices like computers.
Analog signals are used to convert sound waves into electronic signals.
Digital signals are more prone to distortion.
Analog signals are more prone to distortion.
Answers
Analog signals are used to convert sound waves into electronic signals.
Answer:
Explanation: Analog signal is continuous in nature as it is well defined for every specific time. More specifically, it is the one defined continuously for a range of values with time. These are represented as a sinusoidal waveform. The figure below represents an analog signal:
analog signal
As we can see here that the signal is continuous in nature as its every value is specified for each particular interval of time, thus, is referred as the continuous-time signal. For the purpose of recording the analog signals, the actual signal must be preserved as only in that case we can record the accurate analog signal.
However, whenever in any application there arises a need to change an analog signal into a digital one then through sampling this can be achieved. In the sampling technique, this signal is sampled at certain fixed time intervals and the sampled voltage is converted into digital values.
Definition of Digital Signal
A type of signal which is non-continuous in nature as it is defined only for a set of discrete times is known as a digital signal. More simply, we can say, it is specified at some particular time instants only. Thus, here the information is represented as a set of discrete values. The figure given below shows the signal representation in digital form:
digital signal
Here it is clear that the data is discretely positioned in time axis thus is shown in the form of bits i.e., 0 and 1. This means that here the signal performs the sudden transition between 0 and 1 where these two values correspond to the two voltage levels. For the purpose of recording the signals, in the digital one, only the samples of the actual signal are taken and not the whole signal.
Key Differences Between Analog and Digital Signal
Analog and digital signals are differentiated mainly on the basis of their way to carry the information. Analog signals represent the information as a continuous function of time. As against, digital signals are represented discretely at specific time intervals.
Analog signals deteriorate more easily than digital one as their susceptibility towards noise is higher.
The devices that operate on an analog signal need more power for transmission and reception than the devices that work on the digital signal.
The information represented by the analog signal is comparatively more accurate than the digital signal due to its continuous range of values.
Analog signals are transmitted at a slower rate than digital signals as the information holds more values thus is precise.
An analog signal is defined by the amplitude, phase, frequency, etc. While the digital signal is mainly associated with bit rate, bit intervals, etc.
The sinusoidal representation of the analog signal makes it difficult to understand or get decoded thus encryption is not required in analog signals. But as the digital signals are in the form of square waves, thus, it can be decoded easily hence need to be encrypted for secured communication.
On the basis of processing, it is said that the continuous nature of the signal offers easy processing of the analog signal. However, the discrete nature of the signal offers difficultly in the processing of the digital signal.
Conclusion
Thus, the above discussion concludes that due to the way of representing the signal, the two are differentiated. And because of this, the two types of signals possess different properties and are used in different applications. Like analog signals are used in radio wave transmission and reception whereas digital signals are used in the field of digital electronics.
Define An Atom.
Ty!!!
Answers
=> the smallest particle of a chemical element that can exist.
-------☆ﾟ.･｡ﾟᵴɒƙυᴚᴀ_ƨȶäᴎ❀
what is the mechanism for the reaction of ammonia with acetyl chloride
Answers
The reaction of ammonia with acetyl chloride is a nucleophilic substitution reaction that occurs via an addition-elimination mechanism. The mechanism can be described in the following steps:
Step 1: Addition of ammonia to acetyl chloride
The lone pair of electrons on the nitrogen atom in ammonia (NH3) attacks the electrophilic carbon atom in acetyl chloride (CH3COCl), forming a tetrahedral intermediate. This step is the rate-determining step of the reaction and is exothermic.
Step 2: Proton transfer
In this step, a proton is transferred from the ammonium ion intermediate (NH4+) to the chloride ion (Cl-) to form ammonium chloride (NH4Cl). This step is an acid-base reaction.
Step 3: Elimination of HCl
In this step, a chloride ion (Cl-) acts as a nucleophile and attacks the carbon atom in the tetrahedral intermediate, leading to the elimination of a hydrogen chloride (HCl) molecule. This step is also exothermic.
Step 4: Deprotonation
The final step involves deprotonation of the remaining ammonium ion (NH4+) by the solvent or by another molecule of ammonia. This step regenerates the ammonia catalyst and completes the reaction.
Overall, the reaction can be represented by the following equation:
CH3COCl + NH3 → CH3CONH2 + HCl
where CH3CONH2 is the amide product and HCl is the byproduct.
In summary, the mechanism for the reaction of ammonia with acetyl chloride involves the addition of ammonia to the acyl chloride, followed by proton transfer, elimination of HCl, and deprotonation to form the amide product.
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How does the electric force between two charged particles change if the
distance between them is decreased by a factor of 3?
A. It is increased by a factor of 3.
B. It is increased by a factor of 9.
O C. It is decreased by a factor of 3.
O D. It is decreased by a factor of 9.
Answers
which of the following options correctly describe the oxidation of primary alcohols? select all that apply. multiple select question. primary alcohols require different oxidizing conditions than secondary alcohols. a carboxylic acid can be produced by oxidation of a primary alcohol. during oxidation, a primary alcohol will rearrange to produce a more substituted oxidation product. mild oxidizing conditions will result in an aldehyde product. harsher oxidizing conditions will produce a ketone from a primary alcohol.
Answers
The options that describe the oxidation of the primary alcohols is a carboxylic acid can be produced by oxidation of a primary alcohol. Mild oxidizing conditions will result in an aldehyde product.
The Primary alcohols will be oxidized to form the aldehydes and the carboxylic acids. The secondary alcohols will be oxidized to give the ketones. The Tertiary alcohols, in the contrast, cannot be oxidized by without breaking the molecules of the C–C bonds.
The Primary alcohols and the aldehydes will be normally oxidized to the carboxylic acids using the potassium dichromate solution in the presence of the dilute sulfuric acid that is H₂SO₄.
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Which method can be used to detect the end point of an EDTA titration?
a) redox indicator
b) metal ion indicator
c) ion-selective electrode
d) acid-base indicator
Answers
Answer:
b) metal ion indicator
Explanation:
The metal ion indicator is a type of volumetric analysis wherein the colored complex is used to determine the endpoint of the titration. Therefore, it can be used to detect the end-point of an EDTA titration.
1. Which answer choice below BEST defines what a hypothesis is?
A. A statement that explains what the controlled variables are in an experiment.
B. A statement that explains what the procedures are in an experiment.
C. A statement that explains an event or observation because it has been tested many times by
many different scientists.
OS
D. A statement that explains a possible answer to a scientific question that can be tested with an
experiment.
Answers
Answer:
C. A statement that explains an event or observation because it has been tested many times by
many different scientists.
Looking at the past two questions, how many significant figures does the value displayed on the scale and the volume measurement have? a. Scale: 3 Graduated Cylinder: 4 b. Scale: 4 Graduated Cylinder: 3 c. Scale: 3 Graduated Cylinder: 3 d. Scale: 4 Graduated Cylinder: 4
Answers
The correct answer would be option c. Scale: 2 significant figures, Graduated Cylinder: Infinite significant figures.
To determine the number of significant figures in a measurement, we consider the digits that are known with certainty plus one uncertain digit.
In the case of the scale measurement, it is mentioned that the value displayed on the scale is 9.81 g. Since the number 9.81 is given to two decimal places, it indicates that there are two significant figures in this measurement.
Regarding the volume measurement with the graduated cylinder, it is stated that the volume is 60 mL. The number 60 is an exact value without any uncertainty, so it has an infinite number of significant figures.
Based on this information, the number of significant figures in the scale measurement is 2, and the number of significant figures in the volume measurement is infinite. Therefore, the correct answer would be option c. Scale: 2 significant figures, Graduated Cylinder: Infinite significant figures.
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The complete question is:
You were asked to dissolve 9.81 g of compound A in 60 ml of water. After single extraction with 60 ml ether, you recovered 5.71 g of compound A from the ether layer. Calculate the Kd value for the compound A in ether/water system. Report your answer to 2 decimal places (i.e., 0.01). Looking at the past two questions, how many significant figures does the value displayed on the scale and the volume measurement have? a. Scale: 3 Graduated Cylinder: 4 b. Scale: 4 Graduated Cylinder: 3 c. Scale: 3 Graduated Cylinder: 3 d. Scale: 4 Graduated Cylinder: 4
Samira has a son who is 24 months old. Her sister Paulina also has a son who is one and a half years old. Whose son is older? Explain how you know.
Answers
Answer:
the 24 month old
Explanation:
24 divided by the 12 months in a year is 2 and 2 compared to the 1 and a half is bigger
Answers to 33-38 pls
Answers
Answer:
-5
Explanation:
For what I did was:
Switch the numbers
(35-33)
Do the math
Then add a negative because the smaller number is first meaning it will be a negative number
2) A diver weighing 9 Newtons is on a diving board that is 16 meters high. What is the
diver's potential energy?
Answers
Answer: Unknown
Explanation:
In order to solve the question you would require the approximate amount of gravity upon the diver, meaning his acceleration due to gravity.
1)
Layers of cells that form a basic structural material of a plant or animal are known as
A.) system
B.) organ
C.) tissue
D.) organism
Save
Not Graded
2)
All of these plant structures are used in reproduction except
A.) spore
B.) stamen
C.) pistil
D.) phloem
Save
Not Graded
3)
A nonliving or chemical factor that affects the ability of organisms to survive and reproduce is called
A.) a limiting factor
B.) a biotic factor
C.) an abiotic factor
D.) succession
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Not Graded
4)
The phyla that is the largest and most diverse is the
A.) sponges
B.) flatworms
C.) arthropods
D.) chordates
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Not Graded
5)
In order to survive all organisms must be able to do all of these except
A.) grow
B.) reproduce
C.) move from place to place
D.) eliminate wastes
Answers
Answer:
c
Explanation:
Draw the structure of a hydrocarbon that has four carbons in a row and only single bonds. show every bond (i.e. show every C-C and C-H bond present).
2.Draw and show every bond (all must be single bonds) of a correct structure that has three carbons in a row and one carbon coming off of the middle carbon.
Carbons are connected with only single bonds.
3.Assign polar, nonpolar or ionic bond for the following pairs based on your lab report (Do not use electronegativity values).
a) Na-O
b) H-O
c) Li-P
d) Si-O
e) K-H
f) S-S
g) I-Cl
h) P-Cl
I) F-F
j) Gd-O
4.Mass number is defined as number of protons + number of neutrons in a specific isotope of an element. For example, C-12 has mass number of 12. Since the element carbon has 6 protons, we can calculate that C-12 has 6 neutrons. Apply the same logic to the following isotopes and calculate their number of neutrons.
1) C-14
2) Mg-25
3) Au-197
4) Cu-61
5) O-17
5.What are the symbols for the following elements?
a) Silver
b) Chlorine
c) Sodium
d) Sulfur
6.Identify the following elements as metal or nonmetal?
a) Ca
b) F
c) Ti
d) Os
7.Write the atomic numbers for the following elements.
a) Kr
b) C
c) S
d) Sr
1.Indicate the name, atomic number, period, group number, and classification (metal, non-metal, or metalloid) for:
a) Ga
b) Sb
Answers
1. The structure of a hydrocarbon with four carbons in a row and only single bonds:
H H H H
| | | |C---C---C---C
2. The structure with three carbons in a row and one carbon coming off the middle carbon:
H H H
| | |C---C---C
| C
3. Assigning polar, nonpolar, or ionic bond for the following pairs:
a) Na-O: Ionic bondb) H-O: Polar bond
c) Li-P: Polar bondd) Si-O: Polar bond
e) K-H: Polar bondf) S-S: Nonpolar bond
g) I-Cl: Polar bondh) P-Cl: Polar bond
i) F-F: Nonpolar bondj) Gd-O: Ionic bond
4. Calculating the number of neutrons in the given isotopes:
a) C-14: Number of neutrons = Mass number - Atomic number = 14 - 6 = 8 neutronsb) Mg-25: Number of neutrons = Mass number - Atomic number = 25 - 12 = 13 neutrons
c) Au-197: Number of neutrons = Mass number - Atomic number = 197 - 79 = 118 neutronsd) Cu-61: Number of neutrons = Mass number - Atomic number = 61 - 29 = 32 neutrons
e) O-17: Number of neutrons = Mass number - Atomic number = 17 - 8 = 9 neutrons
5. Symbols for the following elements:
a) Silver: Agb) Chlorine: Cl
c) Sodium: Nad) Sulfur: S
6. Identifying the following elements as metal or nonmetal:
a) Ca: Metal
b) F: Nonmetalc) Ti: Metal
d) Os: Metal
7. Atomic numbers for the following elements:
a) Kr: 36b) C: 6
c) S: 16d) Sr: 38
8. Information for the elements Ga and Sb:
a) Ga (Gallium)
- Atomic number: 31 - Period: 4
- Group number: 13 - Classification: Metal
b) Sb (Antimony)
- Atomic number: 51 - Period: 5
- Group number: 15 - Classification: Metalloid
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write a chemical equation for action of HBr on ethanol
Answers
answer:
hope this one helps have a great day !
How are reflecting telescopes different from refracting telescopes?
Answers
Reflecting telescopes are preferred for scientific research because they are better suited for gathering large amounts of light and producing high-quality images. However, refracting telescopes are still popular for amateur astronomers and for viewing objects on Earth.
Reflecting telescopes are different from refracting telescopes because reflecting telescopes use mirrors, whereas refracting telescopes use lenses. The reflecting telescope was invented in 1668 by Sir Isaac Newton, and it has since become one of the most popular types of telescopes.
Reflecting telescopes use a mirror to gather and focus light, while refracting telescopes use a lens to do the same thing. Reflecting telescopes can be made much larger than refracting telescopes because it is easier to make large mirrors than it is to make large lenses. The mirror in a reflecting telescope is placed at the back of the telescope, and it gathers and reflects light back to a secondary mirror, which then reflects the light to the eyepiece. The eyepiece is where the observer looks through the telescope.In contrast, the lens in a refracting telescope is placed at the front of the telescope, and it gathers and bends light as it passes through. The lens focuses the light onto an eyepiece at the back of the telescope. Refracting telescopes are generally smaller than reflecting telescopes because of the difficulty of making large lenses.
Another difference between reflecting and refracting telescopes is the way they are constructed. Reflecting telescopes have a simple tube that houses the mirrors and eyepiece, while refracting telescopes have a more complex design with a long tube that contains the lens and eyepiece.
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A radio station broadcasts at a frequency of 590,000 Hz. What is the wavelength of the radio waves?
Answers
Answer:
f = frequency = 590,000 Hz ===> 59×10^4 Hz
λ = Wavelength = ?
c = Speed of light in a vacuum = 3 × 10^8 m/s
** Hz = 1/sec
___o___o___
\(f = \frac{c}{λ} \\ \\ λ = \frac{c}{f} \\ \\ λ = \frac{3 \times {10}^{8} }{590000} \\ \\ λ = \frac{3 \times {10}^{8} }{59 \times {10}^{4} } \\ \\ λ =0.0508 \times {10}^{4} \: m \\ \\ λ = 508 \times {10}^{ - 4} \times {10}^{4} \: m \\ \\ λ = 508 \: m\)
I hope I helped you^_^
determine the solubility of kcl at 60 °c in 100g of h2o?
Answers
The solubility of KCl at 60 °C in 100 g of water (H2O) can be determined using experimental data or by using a solubility table. The solubility of a substance refers to the maximum amount of that substance that can dissolve in a given amount of solvent at a particular temperature and pressure.
One possible way to determine the solubility of KCl at 60 °C in 100 g of water is to consult a solubility table, which lists the solubility of various substances in water at different temperatures. According to one such table, the solubility of KCl in water at 60 °C is approximately 47 g per 100 g of water.
This means that 100 g of water at 60 °C can dissolve up to 47 g of KCl before becoming saturated, i.e., no more KCl will dissolve in the water at this temperature.
It is important to note that the solubility of KCl (or any substance) in water can be affected by various factors, such as temperature, pressure, and the presence of other solutes. Therefore, the solubility value obtained from a solubility table is only an approximation and may not be accurate for all conditions.
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Questions 13 and 14
look at the pic
Answers
Answer:
13. D Hypothesis 14. A Analyze Matter, Solve Problems
Explanation:
Which molecule has ionic bond?
Mg
C0
NaCl
N0
Answers
NaCl - Chlorine has an outer shell with 7 electrons it wants to gain from the Sodium to become stable, whereas the Sodium wants to lose an electron to become stable.
Calculate deltaH° fornthe following reaction: IF7(g) + I2(g) --> IF5(g) + 2IF(g) using the following information: IF5. -840 IF7. -941 IF. -95
Answers
Therefore, the standard enthalpy change for the given reaction is -947 kJ/mol.
To calculate deltaH° for the given reaction, we need to use the Hess's law of constant heat summation. Hess's law states that the total enthalpy change of a reaction is independent of the pathway taken and depends only on the initial and final states of the system.
We can break down the given reaction into a series of reactions, for which we have the enthalpy values.
First, we need to reverse the second equation to get I2(g) --> 2IF(g), and change the sign of its enthalpy value:
I2(g) --> 2IF(g) deltaH° = +95 kJ/mol
Next, we can add this equation to the first equation, in which IF7(g) is reduced to IF5(g):
IF7(g) + I2(g) --> IF5(g) + 2IF(g)
IF7(g) --> IF5(g) + 2IF(g) deltaH° = (+840 kJ/mol) + (2 x (-941 kJ/mol)) = -1042 kJ/mol
Finally, we can substitute the values we have calculated into the overall reaction equation:
deltaH° = (-1042 kJ/mol) + (+95 kJ/mol)
deltaH° = -947 kJ/mol
Therefore, the standard enthalpy change for the given reaction is -947 kJ/mol.
Note that the answer is a negative value, indicating that the reaction is exothermic (releases heat). Also, make sure to provide a "long answer" to fully explain the process used to calculate deltaH°.
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what is the normality of 0.0521 m h3po4
Answers
The normality of a 0.0521 M H3PO4 solution is 0.1563 N (gram equivalents of solute per liter of solution).
The normality of a solution is defined as the number of gram equivalents of solute per liter of solution. In order to calculate the normality of 0.0521 M H3PO4, we need to first determine the number of gram equivalents of H3PO4 present in 1 liter of solution.
The molecular weight of H3PO4 is 98 g/mol. Each molecule of H3PO4 can donate three protons (H+ ions) in an acid-base reaction, which means that it can react with three equivalents of a base. Therefore, the number of gram equivalents of H3PO4 in 1 liter of a 0.0521 M solution is:
(0.0521 mol/L) x 3 equivalents/mol = 0.1563 equivalents/L
Therefore, the normality of a 0.0521 M H3PO4 solution is 0.1563 N (gram equivalents of solute per liter of solution).
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