A 3.950 l sample of gas is cooled from 91.50°c to a temperature at which its volume is 2.550 l. what is this new temperature? assume no change in pressure of the gas.
Answers
When a 3.950 L sample of gas is cooled from 91.50°C to a volume of 2.550 L with no change in pressure, the new temperature is approximately -36.61°C.
To find the new temperature when a 3.950 L sample of gas is cooled from 91.50°C to a volume of 2.550 L, we can use the Charles' Law formula. Charles' Law states that the volume of a gas is directly proportional to its temperature, assuming that pressure remains constant.
Mathematically, this can be represented as:
V1/T1 = V2/T2
Here, V1 is the initial volume (3.950 L), T1 is the initial temperature (91.50°C), V2 is the final volume (2.550 L), and T2 is the final temperature, which we need to find.
First, convert the initial temperature from Celsius to Kelvin by adding 273.15:
T1 = 91.50°C + 273.15 = 364.65 K
Now, plug the values into the Charles' Law formula:
(3.950 L) / (364.65 K) = (2.550 L) / T2
To find T2, we can cross-multiply and divide:
T2 = (2.550 L) * (364.65 K) / (3.950 L)
T2 ≈ 236.54 K
Finally, convert the temperature back to Celsius by subtracting 273.15:
New temperature = 236.54 K - 273.15 ≈ -36.61°C
In conclusion, when a 3.950 L sample of gas is cooled from 91.50°C to a volume of 2.550 L with no change in pressure, the new temperature is approximately -36.61°C.
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Related Questions
Q 1. Element M is a metal that forms compounds of the type MX2, MX3, and MX4, where X is a Chlorine (Cl).
I) What is the expected trend in the ionic radius of M in these compounds?
II) Arrange these compounds in order of decreasing ionic radius of M.
Do not respond if u don’t know the answer. I’ll report it and u will get a warning.
Answers
Answer:
See explanation
Explanation:
The ionic radius of metal M decreases as the charge on the metal M increases. The ionic radius is generally defined as the distance between the nucleus and the outermost electron of the ion. Hence, ionic radius becomes much lesser as the magnitude of the positive charge increases.
It is obvious from the various formulae of metal chlorides in the question that the metal forms cations M^2+, M^3+ and M^4+ respectively. The order of decreasing ionic radius of the compounds is;
MX2 > MX3 > MX4
Calculate poH if given pH of 9.3
14
4.7
5.01 x 10^-6
Answers
Answer: Option (b) is the correct answer.
Explanation:
It is known that,
pH + pOH = 14
So, pOH = 14 - pH
As the given pH is 9.3. Hence, pOH for the given solution will be calculated as follows.
pOH = 14 - 9.3
= 4.7
Therefore, pOH of the given solution is 4.7.
What is the only object in the table that would sink in corn syrup?
Answers
Answer:
1.38g/cm 3
Copper-More Dense than 1.38g/cm 3
The density of copper is greater than the density of corn syrup, therefore, copper would sink in corn syrup.
What is the density?The density is the characteristic of the material which can be measured as the mass per unit volume. The average density of a substance is equal to mass divided by its total volume.
The formula that can be used to calculate the density of the material is shown as follows:
Density = Mass/Volume
The S.I. unit of density can be represented as Kg/m³. The density of a substance is an intrinsic characteristic as it does not depend upon the quantity of the substance. Buoyancy pushes less dense materials to the surface therefore, they float.
The density of the corn syrup is 1.38 g/cm³ while the density of the copper is 8.80 g/cm³. Therefore, copper is denser than corn syrup so it will sink in corn syrup.
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would you expect propane (ch3ch2ch3) to have a higher or lower enthalpy of vaporization than ethanol? explain your answer.
Answers
Since CH3CH2CH3 is non-polar, Between itself, C2H5OH may create hydrogen bonds. Therefore, ethanol has greater intermolecular forces than propane. so propane has lower enthalpy of vaporization
The enthalpy of a system decreases as heat is transferred from the system to its surroundings, hence Hrxn is negative. On the other hand, if heat is transferred from the environment to a system, the system's enthalpy rises and Hrxn is positive. The process of vaporizationneeds heat. The Heat is absorbed during this procedure. Therefore, the process is endothermic. Therefore, propane would have a lower enthalpy of vaporization.
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Many of the lunar craters are due to volcanic eruptions true or false
Answers
Answer:
false
Explanation:
Craters on the Moon are caused by asteroids and meteorites colliding with the lunar surface. The Moon's surface is covered with thousands of craters. ... It also has very little geologic activity (like volcanoes) or weathering (from wind or rain) so craters remain intact from billions of years.
Freshwater makes up about 90% of the Earth's surface.
Answers
Answer:
what is your question?
Explanation:
I don't understand
4) SiO2 + CSIC + CO Find the theoretical yield of silicon carbide if 50.0 grams of silicon dioxide reacts with 79.1 grams of Carbon.
Answers
The mass of the Silicon Carbide is 33.3 g using the data that has been presented in the question before us.
What is the stoichiometry?In a balanced chemical equation, the coefficients in front of the chemical formulas represent the number of moles of each substance that participate in the reaction.
We can see that;
Number of moles of silicon dioxide = 50.0 grams/60 g/mol
= 0.833 moles
Number of moles of Carbon = 79.1 g/12 g/mol = 6.6 moles
Now silicon dioxide is the limiting reactant.
Thus;
The theoretical yield of the silicon carbide is;
0.833 moles * 40 g/mol
= 33.3 g
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Name the nutrient present in cooked rice , a boiler eggs
Answers
Explanation:
cooked rice
nutrient
carbohydrate.
Boiler eggs
nutrient
Protein.
which characteristic belongs to metal elements
Answers
c. Easily Gain Electrons. Easily Gain Electrons belongs to metal elements.
Metal elements are characterized by having relatively low ionization energies and high electronegativities. This allows them to easily gain electrons from other elements in chemical reactions.Metals are chemical elements that are characterized by their ability to conduct electricity, have a metallic luster, and are malleable and ductile. They are divided into two main categories: ferrous metals, which contain iron, and non-ferrous metals, which do not.An atom can easily gain electrons by participating in a redox reaction. This is when electrons are transferred between two atoms, and the atom that receives the electrons gains them.
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What is Decomposition Reaction
Answers
Answer:
Explanation:
Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.
The decomposition reaction can be represented by the general equation:
AB → A + B
Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.
There are different types of decomposition reactions, including:
Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):
CaCO3 → CaO + CO2
Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):
2H2O → 2H2 + O2
Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:
Cl2 → 2Cl
These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.
Answer:
Explanation:
reaction in which a compound breaks down into simpler substances or elements
What is the molarity of 3 mole of hydrochloride acid in 3 L of water ?
Answers
Answer:
1
Explanation:
Formula of molarity is
\(M=\frac{n}{v}\)
M= molarity
n= no of moles
v= volume in liters (if mL then you have to convert it to L)
What is the mass of 6.78x1050 molecules of NaCl
Answers
Answer:
Explanation:
As
Molar mass of NaCl= 58.44 gm
So we got it that,
58.44 mass of NaCl contain = 6.023*10^23 molecules of Na Cl
x mass will contain = 6.78*10^50
by cross multiplication , we get
x= 58.44*(6.78*10^50)/ 6.023*10^23
x= 65.785 * 10^27 molecules
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Is using a fuel cell to separate water into hydrogen and oxygen a physical or chemical separation?
Answers
using a fuel cell to separate water into hydrogen and oxygen is chemical separation.
fuel cell uses concept of called reversible electrolysis for seperation.The process of separating water into hydrogen and oxygen is known as electrolysis. An electrolyte separates the anode from the cathode in a fuel cell. Different types of electrolyte and the ionic species they conduct play a major role in how different fuel cells operate.At the anode, water reacts to produce positively charged hydrogen ions and oxygen (protons).The hydrogen ions move arbitrarily across the to the cathode as the electrons go through an external circuit.Hydrogen gas is created at the cathode when hydrogen ions and electrons from the external circuit combine.In order to reach the Hydrogen Energy Earthshot objective of lowering the price of clean hydrogen by 80% to $1 per kilogramme in ten years, electrolysis is a primary method of hydrogen production.Learn more about electrolysis here:
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If a solid is placed in a liquid and lots of bubbles are formed, is this a physical change
Answers
Answer:
The formation of gas bubbles is often the result of a chemical change.
differentiate between Acidic radical and basic radical
Answers
Explanation:
Acidic radical
Acid radical is the ion formed after the removal of Hydrogen ion (H+) from an acid. Example: When H2SO4 loses H+ ion, it forms HSO4− which is an acid radical.
Basic radical
The ion formed after the removal of hydroxide ion (OH−) from a base is known as basic radical.
There are three major parts within each dna nucleotide. of these three, which is responsible for the storage of genetic information?
Answers
PLEASE ANSWER REALLY QUICK!!
Drag the item from the item bank to its corresponding match.
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
This is to observe carefully and in detail so as to identify causes, key factors, or possible results.
This is what people do when they are searching for information. People often look in more than one location.
This is a prediction of the outcome of scientific processes based on analysis.
This is the process of steps taken in completing a task, such as a lab investigation.
Answers
We can see here that:
The cloudiest month - AprilThe coldest month - JanuaryThe hottest month - MayWhen the temperature first rose above 90 degrees - February.We see here that the bar graph will be more understandable if there is: A. Title.
Another thing that can aid in understanding the bar graph is: B. add pictures.
What is bar graph?Using rectangular bars with heights or lengths proportional to the values they represent, a bar chart or bar graph displays categorical data. Both a vertical and a horizontal bar plot are possible. A column chart is another name for a vertical bar graph.
An appropriate question to guide Sarah's research will be: C. Which fixture uses the most water in our home?
To make this a real experiment, Sarah has to do the following: D. Collect and analyze data before and after the leaks are fixed.
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How many grams are in 1.11 molecules of N2?
Answers
Answer:
15.547437000000029
Explanation:
solid sodium reacts with liquid water to produce hydrogen gas and aqueous sodium hydroxide(naoh) . write a balanced chemical equation for this reaction.
Answers
The balanced chemical equation for the reaction between solid sodium and liquid water is:
2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g)
In this equation, two atoms of sodium (Na) react with two molecules of water (H₂O) to produce two molecules of sodium hydroxide (NaOH) and one molecule of hydrogen gas (H₂).
The reaction is highly exothermic, meaning it releases a significant amount of heat. Sodium is a highly reactive metal and reacts vigorously with water, causing the evolution of hydrogen gas. Sodium hydroxide, also known as caustic soda, is a strong base that can cause severe skin and eye irritation. This reaction is often used in industrial processes for the production of hydrogen gas and sodium hydroxide.
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you notice that a lawn looks unhealthy and that, perhaps, the grass is dying. Undertake a scientific project to save the lawn.
Answers
This scientific project aims to analyze and implement strategies to rejuvenate a dying lawn, ensuring its vitality and health.
If you notice that a lawn looks unhealthy and the grass is dying, you can undertake a scientific project to save it by following these steps:
Step 1: Identify the problemThe first step is to identify the problem. Observe the lawn and try to determine what is causing the grass to die. Common causes include poor soil quality, lack of water, too much sun or shade, pests, or disease.
Step 2: ResearchOnce you have identified the problem, conduct research to find out more about it. Look for information about how to treat the specific problem that is causing the grass to die. You can consult gardening books or online resources.
Step 3: Develop a hypothesisBased on your research, develop a hypothesis about what is causing the problem. For example, if you think the soil quality is poor, your hypothesis might be that adding fertilizer will improve the health of the grass.
Step 4: Design an experimentDesign an experiment to test your hypothesis. For example, if your hypothesis is that adding fertilizer will improve the health of the grass, you could divide the lawn into two sections. Apply fertilizer to one section and not the other. Record your observations over time to see if the grass in the fertilized section is healthier.
Step 5: Conduct the experiment , Carry out your experiment, making sure to record your observations.
Step 6: Analyze the data Analyze your data and determine whether your hypothesis was correct. If the grass in the fertilized section is healthier than the grass in the section without fertilizer, your hypothesis was correct.
Step 7: Draw a conclusion Based on your analysis, draw a conclusion about what is causing the problem and how it can be fixed. For example, if your experiment showed that adding fertilizer improved the health of the grass, you could conclude that the soil quality is poor and that fertilizing the lawn will help to improve it.
Step 8: Take action Based on your conclusion, take action to fix the problem. In this case, you would apply fertilizer to the entire lawn to improve its health.
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Students will design an experiment to find out if brand X fertilizer will affect the growth of Lily
plants. Remember a fair experiment only has ONE (1) Independent Variable. In this experiment,
Answers
The independent variable as we can see from the experiment that have been described in this case is the brand of fertilizer that was used in the study.
What is an experiment?When we talk about an experiment, we are talking about the way by which the relation ship between the dependent and the independent variable could be studied. In the experiment, there is a dependent variable which would change values when the variable that is under study in the particular experiment changes value. We have to know that in the realm if science, it is only by the means of experiments that we can be able to establish cause and effect relationships.
In this case, we can see that the experiment that the students were working on has to do with trying to actually find out if brand X fertilizer will affect the growth of Lily plants. This means that they were studying the effect of a fertilizer brand on the growth of the crops.
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Given a solid mixture containing sodium chloride, magnesium oxide and benzoic acid. i. Design a scheme to successfully separate and collect each component of the mixture.
Answers
Answer:
filtration and Chromatography
Explanation:
The first method used for separation of solids from the mixture is filtration. Filtration is used to separate different solids in a mixture which has particles of different sizes. Other method is Chromatography in which the compounds in the mixtures are separated from each other by moving the mixture at high speed. Due to high speed, the compounds are separated from each other because different compounds have different speeds so it is separated easily.
what does Le châteliers principle state?
Answers
Hope this helps!
This is hard, isn't it? please help me though. PLEASE
Answers
for the reaction δ g° 700k = –13.457 kj. what is kp for this reaction at 700. k?
Answers
The value of Kp for the reaction at 700 K cannot be determined solely from the given information.
The standard Gibbs free energy change (ΔG°) at a given temperature can be related to the equilibrium constant (K) through the equation:
ΔG° = -RTln(K)
Where:
ΔG° is the standard Gibbs free energy change
R is the gas constant (8.314 J/(mol·K))
T is the temperature in Kelvin
K is the equilibrium constant
To calculate Kp, we need to convert the given ΔG° value from kilojoules to joules and calculate K at 700 K.
Given: ΔG° = -13.457 kJ
Converting to joules:
ΔG° = -13.457 kJ × 1000 J/kJ
ΔG° = -13,457 J
Rearranging the equation for ΔG°:
K = e^(-ΔG° / (RT))
Substituting the known values:
K = e^(-(-13,457 J) / ((8.314 J/(mol·K)) * 700 K))
Calculating the value of K requires knowledge of the reaction stoichiometry and the specific reactants and products involved. Without that information, we cannot determine the value of Kp for the given reaction at 700 K.
The value of Kp for the reaction at 700 K cannot be determined without additional information about the reaction and its stoichiometry.
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minant in horses, and curly hair is recessive. Black hair is dominant, and chestnut hair is r
enotes black and b denotes chestnut, classify the alleles according to their types.
SS
BB
bb
Ss
Bb
Homozygous
Dominant
SS
Heterozygous
Homozygous
Recessive
Answers
Genotypes ratios are 1 : 2 : 1 for brown yellow tannish and white horse
The term "genotype" broadly refers to an organism's genetic make-up; in other terms, it characterizes an organism's whole gene pool. The phrase can also be used to describe to the genotypes, or different versions of a genome, that an organism carries in a more specific meaning.
Genotypes are as follows:
brown horses are BB
white horses are bb genotype
yellow-tannish colored horse are Bb genotype
Brown × White (Bb× bb)
100% Bb genotype
Brown × Yellow tannish colored horse(BB × bb)
25% BB, 50% Bb, 25% bb
Hence, The ratio which the brown yellow tannish and white horse holds are as follows
1 : 2 : 1
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uh id.k how to fill this out, i mean the type of reaction part is obvious but id.k what to put in the box and the other blue part.
Answers
Answer:
Explanation:
Strontium chlorate appears as a moist solid or semi-solid slurry of white crystals. May explode under exposure to heat or fire. Used in pyrotechnics
strontium chlorate | Sr(ClO3)2 - PubChem.
Description: Strontium chlorate appears as a ...
Synonyms: STRONTIUM CHLORATE7791-10-...
Molecular Formula: Sr(ClO3)2 or Cl2O6Sr
23) how many unpaired electrons would you expect for the complex ion: [co(oh)6]3-? a) 1 b) 2 c) 4 d) 0 e) 3
Answers
Unpaired electrons: The number of electrons that are singly occupying an orbital in a molecule or atom are unpaired electrons. Unpaired electrons in metal complexes are linked to the chemical and physical properties of a molecule. When all electrons are paired with another, the molecule has no unpaired electrons,
therefore a diamagnetic molecule is formed. Unpaired electrons cause paramagnetism in molecules and atoms.The given complex ion is [Co(OH)6]3-. For determining the unpaired electrons, we have to write down the electronic configuration of the given complex ion.
The electronic configuration of Co is [Ar]3d74s2.Now, in Co(III) ion, the 3d level is expected to be half-filled, and then the 4s level is emptied. Therefore, the electronic configuration of the given complex ion [Co(OH)6]3- is: [Co(III)]=[Ar]3d6We know that d-orbitals have five orbitals and can have a maximum of 10 electrons (i.e., five pairs of electrons).The electronic configuration of Co(III) ion indicates that all the electrons are paired up i.e., there is no unpaired electron. Therefore, the correct option is "d) 0". 0" and the of this is that the electronic configuration of the given complex ion [Co(OH)6]3- is [Co(III)]=[Ar]3d6 which indicates that all the electrons are paired up i.e., there is no unpaired electron. Therefore, the correct option is "d) 0".
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A solution of NaCl was prepared in the following manner: 0.0842 g of NaCl is massed out on an analytical balance. The solid is transferred to a 25.00 mL volumetric flask. Deionized water is added to the flask such that the bottom of the meniscus is at the line. A 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask using a volumetric pipet and diluted to volume. 6. Calculate the concentration of NaCl in the resulting solution in mg/L NaCl. (answer = 67.4 mg/L) 7. Calculate the concentration of NaCl in the resulting solution using propagation of error through the calculation. Use the manufacturer's tolerance values as the absolute error. The tolerances can be found in Chapter 2 of the Harris text. Assume a Class 1 balance and Class A glassware. Treat the tolerances as random error. (answer = 67.4+0.4 mg/L) 8. Identify 2 possible sources of random (indeterminate) error. Identify 2 possible sourses of systematic (determinate) error.
Answers
Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl
To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7. Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.
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What’s the kinetic theory
Answers
The kinetic theory states that the forces between molecules and the energy that they possess.
What is kinetic theory ?The kinetic theory of matter helps to understand why matter exist in different stages i.e., solid, liquid and gases, and how matter can convert from one stage to another.
The assumption of kinetic theory is that the measurable characteristics of gases, liquids, and solids reflect the mixed actions of countless numbers of atoms and molecules.
Thus, The kinetic theory states that the forces between molecules and the energy that they possess.
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