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Rainbow [258]
3 years ago
14

Please help me!!! Is 2H2O an element or compound???

Chemistry
1 answer:
ser-zykov [4K]3 years ago
4 0

Answer:

This is an element, I believe ! (Correct me if I'm wrong)

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C

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Answer is C

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4 years ago
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3 years ago
How many molecules are in 20.2 moles of CO₂?
mrs_skeptik [129]

Answer:

1.22 x 10²⁵ molecules CO₂

Explanation:

To find the amount of molecules, you need to multiply the number of moles by Avogadro's Number. Avogadro's Number is a ratio which represents the amount of molecules per every 1 mole. It is important to arrange this ratio in a way that allows for the cancellation of units (since you are going from moles to molecules, moles should be in the denominator). The final answer should have 3 sig figs like the given value.

Avogadro's Number:

6.022 x 10²³ molecules = 1 mole

 20.2 moles CO₂           6.022 x 10²³ molecules
---------------------------  x  --------------------------------------  = 1.22 x 10²⁵ molecules
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8 0
1 year ago
(there are 3 quetions) how is heat being transfered in:
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5 0
3 years ago
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