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Rufina [12.5K]
3 years ago
11

Pleaseeee helpppppppp

Chemistry
1 answer:
Minchanka [31]3 years ago
7 0

Answer:

C. The third option

Explanation:

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omeli [17]
This question is a dilution problem. In order to prepare a certain concentration and volume from a stock solution, you have to use the equation,

M1V1 = M2V2

From the equation, you need to calculate the volume you need from the stock solution to be able to have the diluted concentration then dilute it to a certain volume.

(1.0 M) (V1) = (0.1 M) (100 mL)
V1 = 0.1 mL is needed from the 1.0 M HCl solution

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4 years ago
How many atoms of oxygen are there in one molecule of carbon dioxide, if the chemical formula is CO2?
defon

Answer:

2

Explanation:

CO₂ shows that there are 2 oxygen molecules. Also, the name Carbon Dioxide. This shows there is One Carbon and Two Oxygen molecules from the naming system.

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3 years ago
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3 years ago
Explain why the catalyst is used as a very fine powder and larger pieces of iron are not used.
Allushta [10]

Answer:

<h2><u>Reason:</u></h2>

Catalyst is used as a very fine powder and larger pieces of iron are not used. This is because the surface area of catalyst needs to be large so that more of the surface is exposed to the substrate and more of the substrate is catalyzed.

<h2><u>Important Info:</u></h2>

=> Larger Pieces of Iron has a smaller surface area than the fine particles.

=> Larger the surface area of catalysts/enzymes , more will be the reaction rate and vice versa.

Hope this helped!

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Whenever energy is ______ from one form to another, some of that energy is lost by being changed into heat.
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Whenever energy is converted from one form to another, some of that energy is lost by being changed into heat.
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