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2 years ago

Pliss HELP ME only if you know the answer

Chemistry

1 answer:

Nadusha1986 [10]2 years ago

7 0

Answer:

100 and 1 atm

Explanation:

I think the gas is given kinetic energy only from its temperature

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enyata [817]

It’s B. Substitution hope this helps

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2 years ago

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Calculate the no. of each atoms presents in 10 grams of calcium carbonate.

raketka [301]

Molar Mass of Calcium carbonate:-

$\\ \sf\longmapsto CaCO_3$

$\\ \sf\longmapsto 40u+12u+3(16u)$

$\\ \sf\longmapsto 52u+48u$

$\\ \sf\longmapsto 100u$

$\\ \sf\longmapsto 100g/mol$

Given Mass=10g

$\boxed{\sf No\:of\;moles=\dfrac{Given\:Mass}{Molar\:Mass}}$

$\\ \sf\longmapsto No\:of\;moles=\dfrac{10}{100}$

$\\ \sf\longmapsto No\:of\:moles=0.1mol$

Now

$\boxed{\sf No\:of\:molecules=No\;of\:moles\times Avagadro\: No}$

$\\ \sf\longmapsto 0.1\times 6.023\times 10^{23}$

$\\ \sf\longmapsto 6.023\times 10^{22}molecules$

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2 years ago

Does the model below represent a mixture or a substance ?

Vikentia [17]

Answer:

substance

Explanation:

A mixture is when two or more <u>different</u> atoms/molecules are together, but not joined.

A substance is when the <u>same </u>atom/molecule is in a group together.

In this example, it is a substance because it is comprised of the same molecule not joined all together. If you wanted a mixture, other colored atoms/molecule (e.g. add green atoms) would change it to this property.

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2 years ago

COCI2 has an effusion rate of 0.00172 m/sec. Which of the gases below would have an effusion rate of 0.00323 m/sec?

geniusboy [140]

CO por qué si y punto, chao

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1 year ago

Naming the hydrates?

slamgirl [31]

HEY mate here your answer

CoBr2 . 6 h2o = Cobalt(II) Bromide Hexahydrate

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2 years ago

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Pliss HELP ME only if you know the answer ​

Pliss HELP ME only if you know the answer