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Charra [1.4K]
3 years ago
8

I don't know if this is a chemistry question but I need help its a science question from what I know!

Chemistry
1 answer:
Alex17521 [72]3 years ago
6 0

Answer:

The 3 rd answer

Explanation:

Atomic number is the number of protons in the nucleus of that element...

Mass number is the the sum of protons and neutrons in the nucleus of the atom..

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How many grams of hydrogen are contained in 2.00 mol of C6H7N
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Solution:- We have been given with 2.00 moles of C_6H_7N and asked to calculate the grams of hydrogen present in it. It's a two step conversion problem. In first step we convert the moles of the compound to moles of hydrogen as one mol of the compound contains 7 moles of hydrogen. In next step the moles are converted to grams on multiplying the moles by atomic mass of H. The calculations are shown as:

2.00molC_6H_7N(\frac{7molH}{1molC_6H_7N})(\frac{1.0gH}{1molH})

= 14.0 g H

So, there are 14.0 g of hydrogen in 2.00 moles of  C_6H_7N .

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3 years ago
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