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2 years ago

Our day is 24 hours long because that is the time it takes the earth to

Chemistry

2 answers:

Marianna [84]2 years ago

3 0

Complete one rotation.

Hope this helps.

Anna [14]2 years ago

3 0

Our day is 24 hours long because that is the time it takes the earth to make one rotation on it's axis.

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State two causes of cracked and sore nipples during breastfeeding

Nadusha1986 [10]

The biting and sucking of the baby when eating.

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2 years ago

How do ions form bonds, and describe the structure of the resulting compound.

Artemon [7]

Answer:

Electrons are transferred between atoms together in the ionic compound. The ions are arranged in a regular repeating pattern in an ionic crystal

Explanation:

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2 years ago

C(S)+O2(g)-->CO2(g)

soldi70 [24.7K]

<u>Answer:</u> The correct answer is 1.18 g.

<u>Explanation:</u>

We are given a chemical equation:

$C(S)+O2(g)\rightarrow CO_2(g)$

We know that at STP conditions:

22.4L of volume is occupied by 1 mole of a gas.

So, 2.21L of carbon dioxide is occupied by = $\frac{1}{22.4L}\times 2.21L=0.0986mol$ of carbon dioxide gas.

By Stoichiometry of the above reaction:

1 mole of carbon dioxide gas is produced by 1 mole of carbon

So, 0.0986 moles of carbon dioxide is produced by = $\frac{1}{1}\times 0.0986=0.0986mol$ of carbon.

Now, to calculate the mass of carbon, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of carbon = 0.0986 mol

Molar mass of carbon = 12 g/mol

Putting values in above equation, we get:

$0.0986mol=\frac{\text{Mass of carbon}}{12g/mol}\\\\\text{Mass of carbon}=1.18g$

Hence, the correct answer is 1.18 g.

3 0

3 years ago

Read 2 more answers

How would the group best find out whether their study is worth more time and resourch

Anastaziya [24]

They would find out by studying hard and researching different things on which is more important

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3 years ago

Atoms of elements that are in group 15 with what charge

liq [111]

Answer:

The elements in group 13 and group 15 form a cation with a -3 charge each.

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2 years ago