Answers
Answer:
javier applied force how this helps
Related Questions
A 14.579 g sample of CaCl2 was added to 28.016 g of K2CO3 and mixed in water. A 3.558 g yield of CaCO3 was obtained.
What is the limiting reagent?
Answers
Answer:
CaCl3 is the limited reagent
Explanation:
Choose the incorrect statement A. Replacing 3 of the H of LiALH4 with OR groups make it a more reactive reducing agents than NaBH4. B. Ester functional group has a higher priority than aldehyde in nomenclature. C. Ketones are more reactive than esters. D. Aldehydes are less reactive than acyl halides. E. Reactions of aldehydes with (1) NaBH4 and (2) H3O+ form primary alcohols.
Answers
Answer:
Replacing 3 of the H of LiALH4 with OR groups make it a more reactive reducing agents than NaBH4
Explanation:
LiAlH4 and NaBH4 are two well known reducing agents in organic chemistry. These two reducing agents function by transfer of hydrogen to the substrate.
If the hydrogen atoms in LiAlH4 are replaced by the -OR moiety, the new compound will be far less reducing than NaBH4 because the hydrogen atoms necessary to effect the reduction has been removed. Thus, the new compound containing -OR moiety can never be more reducing than NaBH4. This implies that the statement written in the answer is false as written.
advanced flow measuring devices ?
I need info about this topic please
Answers
Answer:
they are:-
venturi meter.
orfice plate.
Dall tube .
pitot tube.
Averaging pitot tube .
cone meter.
linear resis meter.
A technician is installing a liquid cooling system for a high-end gaming PC. Which of the following liquids is MOST likely used for cooling?A. Iodine
B. Mercury
C. Thermal paste
D. Oil
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Choose the correct answer.
Answers
The correct reaction equation is; Sr(OH)2 ----> Sr + 2OH
How do you know a correct reaction equation?A correct chemical reaction equation must follow the law of conservation of mass, which states that matter cannot be created or destroyed, only transformed from one form to another. This means that the total number of atoms of each element on the reactant side of the equation must be equal to the total number of atoms of each element on the product side.
To ensure that an equation is correct, you should first check that the chemical formulas of the reactants and products are correct. You can then balance the equation by adjusting the coefficients in front of each chemical formula so that the number of atoms of each element is the same on both sides of the equation.
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22 Agas that is collected by upward delivery is likely to be A heavier than air B insoluble in water C lighter than air D Soluble in water
Answers
Answer:
joib
Explanation:
How many molecules would there be in 3.500 grams of carbon disulfide?
Answers
Carbon disulfide:
\(CS_2\)First, we need to know this:
1 mol of CS2 = 76.13 g (this value is obtained from the molar mass)
Also,
1 mol of CS2 = 76.13 g = 6.022 x 10^23 formula units ( molecules, atoms, etc.)
We have been asked for the number of molecules in 3.500 g of CS2.
Procedure:
75.13 g of CS2 ---------------- 6.022 x 10^23 molecules of CS2
3.500 g of CS2---------------- x
\(x\text{ = }\frac{3.500gx6.022x10^{23}molecules}{75.13\text{ g}}=2.805x10^{22}molecules_{}\)Answer: 2.805x10^22 molecules of CS2
Give an example of how matter flows through a system.
Answers
Answer:
Carbon and nitrogen are examples of nutrients. Decomposers release nutrients when they break down dead organisms. The nutrients are taken up by plants through their roots. The nutrients pass to primary consumers when they eat the plants.
Explanation:
Aluminum undergoes a single-displacement reaction with copper (II) sulfate to form aluminum sulfate and _______________.
Answers
Ans cooper
6. The drawing shows Samir riding his mountain bike.
i) Draw a circle around the places on the drawing where there
should be a lot of friction.
ii) Explain why there should be a lot of friction in these places.
Answers
Answer:
You Need To Upload The Photo Then I Will Help You :)
Explanation:
Zoe left her water bottle capped and in her bedroom. She came back some time later to realize that the bottle was “sweating” and left a ring of liquid on her nightstand
Explain thoroughly the science behind why Zoe’s water bottle is sweating
Answers
Answer:
Condensation
Explanation:
Zoe is quite keen to have noticed what we call condensation. Air contains many components, one of those being water vapor. Like how sugar is soluble in water, water can be said to be "soluble" in air. Water will evaporate into the air to a certain extent. The higher the temperature of the air, the more water the air can hold. If the air has more water that it can hold (potentially because of a temperature decrease), the extra water will come out of the air. Zoe's water bottle was cold, and because the air around Zoe's bottle had cooled down, the air can not hold as much water as it could when it was warm, so the air deposited the extra water in the form of liquid water onto the bottle, giving the illusion that her bottle was sweating.
chemical name of this formula Na2SO4.
Answers
Na is for sodium and SO4 is sulfate...
Answer: The chemical compound name for Na₂SO₄ is Sodium Sulfate.
Elements with atomic numbers of 104 and greater are known as super-heavy elements. None of these elements have been found in nature but instead have been made in a laboratory. They are very difficult and expensive to create, and they break down into other elements quickly. There currently are no practical applications for any of these elements. However, some scientists believe that, with further work, they may discover some isotopes and super-heavy elements that are move stable and that could possibly have practical implications. Do you think that scientists should continue to try and create super-heavy elements and expand the periodic table? explain why or why not
Answers
The goals of scientific research are to further knowledge and address pressing issues. This assisted us in comprehending the state of the art.
What is super-heavy elements?Chemical elements with an atomic number greater than 103 are referred to as superheavy elements, transactinide elements, transactinides, or super-heavy elements. The periodic table's superheavy elements are the ones that follow the actinides; lawrencium is the final actinide.
Superheavy elements are transuranium elements by definition, meaning they have atomic numbers higher than uranium (92). Lawrencium could also be added to conclude the 6d series, in accordance with the definition of 3 groups that the authors use. The goals of scientific research are to further knowledge and address pressing issues. This assisted us in comprehending the state of the art.
Therefore, the goals of scientific research are to further knowledge and address pressing issues. This assisted us in comprehending the state of the art.
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[H+] = 2.5 x 10-3M find the pH and pOH
Answers
pH = 2.6
pOH = 11.4
Explanations:The formula for calculating the pH of a solution is given as;
\(pH=-log[H^+]\)Given the following parameter
\([H^+]=2.5\times10^{-3}\)Substitute the given parameter into the formula
\(\begin{gathered} pH=-log(2.5\times10^{-3}) \\ pH=-log(0.0025) \\ pH=-(-2.6) \\ pH=2.6 \end{gathered}\)Determine the pOH of the solution
\(\begin{gathered} pH+pOH=14 \\ pOH=14-pH \\ pOH=14-2.6 \\ pOH=11.4 \end{gathered}\)Therefore the pH and pOH of the solutionare 2.6 and 11.4 respectively
Pewter is a solidified solution of tin and lead or tin and zinc. In both cases, tin is the main component. Which metal would you classify as the solute in each type of pewter?
Answers
Write the ionic equation for the percipitation of zinc phosphate from aqueous solution
Answers
Answer:
Zn2++2OH−→Zn(OH)2
Explanation:
According to Dalton’s atomic theory, which of the following are true? Check all that apply. Check all that apply.
Atoms of two different elements combine to form compounds.
Atoms of an element are identical to atoms of other elements.
Every element is made of atoms.
In a chemical reaction, some atoms disappear and new atoms appear.
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Dalton asserted the indivisible nature of atoms. The mass and chemical characteristics of all atoms of a specific element are the same.
Atoms of two different elements combine to form compounds: Dalton's atomic theory states that atoms of different elements can combine in different proportions to form compounds.
Atoms of an element are identical to atoms of other elements: Dalton's atomic theory states that atoms of the same element have the same properties and composition.
Every element is made of atoms: Dalton's atomic theory states that all elements are made up of atoms, which are the smallest indivisible particles of matter.
In a chemical reaction, some atoms disappear and new atoms appear: Dalton's atomic theory states that in a chemical reaction, atoms are neither created nor destroyed, but simply rearranged into new combinations.
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What functional group results when cyclopentanone reacts with ethylamine in the presence of trace acid? A) cyanohydrin B) semicarbazone C) imine D) enamine E) oxime
Answers
Which of the following must gain 2 electrons to achieve a noble gas configuration?
Group of answer choices
Phospors
Nitrogen
Sulfur
Chlorine
Answers
Answer:
sulfur
Explanation:
since sulfur is in group six meaning it has six election in the outer most shell hence it gains two elections for it to be stable
Write a summary paragraph discussing this experiment and the results. Use the following questions to help guide the content of your paragraph.
What was your hypothesis? According to your data, was your hypothesis was correct?
Why did some substances require larger additions before a color change was seen? What does this indicate about the strength of the acid or base?
What happened in the final step of the experiment? What does the final color indicate?
To what extent was this experiment useful in determining pH? Could a specific pH be determined using this procedure?
Why are acid and base indicators important? How could they be used in everyday life?
Answers
Answer:
The experiment tested the pH levels of various substances by using universal indicator and observing the color change. The hypothesis was that substances with a pH closer to 7 would require smaller amounts of indicator for a color change compared to substances with more extreme pH levels. The data collected supported this hypothesis, as substances with pH closer to 7 required smaller amounts of indicator. This indicates that the strength of the acid or base affects the amount of indicator needed for a color change. In the final step of the experiment, the universal indicator was added to a substance until the color stabilized, indicating the pH level. The final color observed indicates the pH level of the substance. While this experiment is useful in determining the approximate pH level of a substance, it cannot determine a specific pH. Acid and base indicators are important as they allow us to determine the pH level of a substance, which can be useful in everyday life, such as in pool maintenance or testing the acidity of soil for gardening.
Explanation:
Answer:
A hypothesis states your predictions about what your research will find. It is a tentative answer to your research question that has not yet been tested. For some research projects, you might have to write several hypotheses that address different aspects of your research question. Some substances work only for strong bases or weak bases or strongs acids. Example, if you have a weak base solution (pH=8) and you add phenolphthalein, then you need a lot of phenolpthalein drops to see a pink color change because phenolphthalein is for stronger bases 1. liquids such as lemonade clear soda and the clear shampoo would be acidic where as the baking soda dish soap and fertilizer would be basic, my hypothesis was somewhat correct all but the soda was correct by the looks of the colors.2. Some liquids required more because the strength of the acidity or base wasn't very strong thus requiring a larger amount of liquid added to the cabbage indicator.3. At the end of the experiment when the vinegar and baking powder were added together the colors mixed into a mix of the two more purple then the cabbage indicator and there was plenty of bubbles in the solution.4. Not very useful unless you know exactly what the colors indicate. Yes, all that would be needed is a ph scale.5. Acids and base indicators help us identify whether a substance is acidic or basic. They can be used to detect the nature of soil, samples etc which can be helpful.Acid-base indicators are most often used in a titration to identify the endpoint of an acid-base reaction. They are also used to gauge pH values and for interesting color-change science demonstrations.On a topographic map, what is used to show elevation? a. relief c. blue lines b. contour lines d. an open circle Please select the best answer from the choices provided A B C D
Answers
Answer:
the answer should be B
Explanation:
contour lines
Answer:
B- contour lines
Explanation:
I just took the test
YW
You are given a sample of benzoin that has been contaminated with anthracene and you purify this sample by recrystallization. Which of the following is a possible melting point you may measure if you did not successfully purify benzoin and it is still contaminated with anthracene? (literature melting points: benzoin 134-138C; anthracene 210-215C).
A. 120-130B. 172-175C. 134-136D. 210-212
Answers
Answer:
The correct option is A
Explanation:
Now from the question we are told that the purification of benzoin was not successful and generally for every substance , it melting point at the pure state is higher that its melting point at its impure state, with this knowlege and the information given in the question that the melting point of benzoin at it pure state is (134-138 ) °C, we can deduce that the melting we may measure if we did not successfully purify benzoin and it is still contaminated with anthracene is (120-130) °C
using the partial charges, draw out the full reaction mechanism for this acid-base reaction: draw the arrows to show how the arrows to show how the electrons flow from source to sink.
Answers
In an acid-base reaction, the partial charges on the molecules are used to determine the flow of electrons from one atom to another. The partial charges indicate where the electrons are more or less likely to be found, and this helps to determine the direction of the electron flow.
In the reaction mechanism, the arrows are drawn from the atom with the partial negative charge (the electron source) to the atom with the partial positive charge (the electron sink). This indicates the flow of electrons from the source to the sink.
For example, in the reaction between a hydrogen ion (H+) and a hydroxide ion (OH-), the partial charges are as follows:
H+ has a partial positive charge and OH- has a partial negative charge. The arrow is drawn from the oxygen atom in the hydroxide ion (the electron source) to the hydrogen ion (the electron sink). This indicates that the electrons are flowing from the oxygen atom to the hydrogen ion.
Overall, the partial charges are used to determine the direction of the electron flow in an acid-base reaction, and the arrows are drawn to show this flow from the electron source to the electron sink.
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Baseballs pitched by a machine have a horizontal velocity of 30 meters/second. The machine accelerates the baseball from 0 meters/second to 30 meters/second in 0.5 seconds. If a baseball has a mass of 0.15 kilograms, the force the machine exerts is newtons. Use F = ma, where a = v − u t .
Answers
The machine exerts a force of 9 newtons on the baseball to accelerate it from 0 m/s to 30 m/s in 0.5 seconds.
To calculate the force exerted by the machine on the baseball, we can use Newton's second law of motion, which states that force (F) is equal to the product of mass (m) and acceleration (a).
In this case, the acceleration can be determined using the formula a = (v - u) / t, where v is the final velocity, u is the initial velocity, and t is the time taken for the acceleration.
Given:
Mass of the baseball (m) = 0.15 kg
Initial velocity (u) = 0 m/s (as the baseball starts from rest)
Final velocity (v) = 30 m/s
Time (t) = 0.5 s
First, let's calculate the acceleration:
a = (v - u) / t
a = (30 m/s - 0 m/s) / 0.5 s
a = 60 m/s^2
Now, we can use the calculated acceleration and the given mass to determine the force:
F = m * a
F = 0.15 kg * 60 m/s^2
F = 9 N
The machine exerts a force of 9 newtons on the baseball. This force is calculated using Newton's second law of motion, which states that force is equal to mass multiplied by acceleration.
By determining the acceleration of the baseball using the formula a = (v - u) / t and substituting the given values, we find that the acceleration is 60 m/s^2. Multiplying the mass of the baseball (0.15 kg) by the acceleration gives the force exerted by the machine as 9 newtons.
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what are the impact of soil Science to the development of Ghana's agriculture?
Answers
In an ecosystem, the impact of soil Science to the development of Ghana's agriculture is that it provides suitable conditions for root germination and growth.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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What is the term for producing a current by moving a wire through a magnetic field?
solenoid induction
flowing induction
electromagnetic induction
coiled induction
Answers
The term for producing a current by moving a wire through a magnetic field is electromagnetic induction.
When a conductor (such a wire) is moved through a magnetic field, a voltage is induced across the conductor, in accordance with Faraday's law of electromagnetic induction. The right answer is c.
Michael Faraday made the initial discovery of this phenomenon in the early 19th century. The strength of the magnetic field, the rate of movement, and the angle between the conductor and the magnetic field all affect how much voltage is induced.
Electric generators, which transform mechanical energy into electrical energy, work on the fundamental principle of electromagnetic induction. It serves as the foundation for numerous contemporary technologies, such as wireless charging, motors, and transformers.
In conclusion, electromagnetic induction is a key idea in physics and electrical engineering that outlines the procedure of generating a current by moving a conductor through a magnetic field. The correct option is c.
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Helppppppp plssss guysss
Answers
Answer:
3 - coefficient
2 subscripr
6 total #
cl- element symbol
A sealed container can hold 6.28 L CO2 at 1.00 atm and 293 K. How many moles of CO2 fill the container?
Answers
The term "molar volume" (Vm) of an ideal gas refers to this amount. (STP) as 293 kelvin (K) of temperature and 1 atmosphere of pressure (P = 1 atm, which is also equal to 760 torr). Any ideal gas has a 22.4 L molar volume at STP.
How can I calculate the molar volume?The volume occupied through one mole of the a chemical element or chemical compound at a standard temperature and pressure (STP) is known as the molar volume (Vm). By dividing the mass density () by the molar mass (M), it can be computed.
Are moles and molar volume the same thing?One mole of any gas has the same volume when it is present at the same temperature and pressure. The volume that one mole of any gas occupies at standard pressure and temperature is known as the molar volume. 24 dm3 is equivalent to the molar volume (24,000 cm 3). In cases where it is necessary, this volume is provided.
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About how long did it take for this population to reach the carrying capacity of this habitat
Answers
Answer:100
Explanation:
The teacher said the volume of the liquid was 500 mL when measured a student found it was 499.7 mL what is the students percent error
Answers
Answer:
0.06 %Explanation:
The percentage error of a certain measurement can be found by using the formula
\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)
From the question
error = 500 - 499.7 = 0.3
actual volume = 500 mL
We have
\(p(\%) = \frac{0.3}{500} \times 100 \\ = \frac{3}{50} \\ \)
We have the final answer as
0.06 %Hope this helps you