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vivado [14]
3 years ago
15

Why is it o2 and not o?and what does the 2 stand for?​

Chemistry
2 answers:
lutik1710 [3]3 years ago
7 0

Answer:

Atoms

Explanation:

O2 is Written with a two as it is two oxygen atoms. Just o means one oxygen atom

Tanzania [10]3 years ago
4 0

Answer: Oxygen usually is in the form of diatomic molecules, this means each molecule contains two oxygen atoms.

Explanation:  molecules form because of a lone oxygen atom is two electrons short of a full outer shell of eight. In order to fill the outer shell, one oxygen electron will share electrons with another one. Each oxygen atom 'gains' two electrons from the other. A total four electrons are shared between them, two from each atom, thus a double covalent bond is created.

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zmey [24]

Answer: Moles of hydrogen required are 4.57 moles to make 146.6 grams of methane, CH_{4}.

Explanation:

Given: Mass of methane = 146.6 g

As moles is the mass of a substance divided by its molar mass. So, moles of methane (molar mass = 16.04 g/mol) are calculated as follows.

Moles = \frac{mass}{molar mass}\\= \frac{146.6 g}{16.04 g/mol}\\= 9.14 mol

The given reaction equation is as follows.

C + 2H_{2} \rightarrow CH_{4}

This shows that 2 moles of hydrogen gives 1 mole of methane. Hence, moles of hydrogen required to form 9.14 moles of methane is as follows.

Moles of H_{2} = \frac{9.14}{2}\\= 4.57 mol

Thus, we can conclude that moles of hydrogen required are 4.57 moles to make 146.6 grams of methane, CH_{4}.

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tatyana61 [14]
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Explanation:

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2.06 x 10^5 J are needed
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