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9966 [12]
3 years ago
12

All cell activity is controlled by the A. nucleus

Chemistry
2 answers:
Lelu [443]3 years ago
8 0

Answer:

A

Explanation:

how I know this I am very smart I know everything

tangare [24]3 years ago
3 0

Answer:

A

Explanation:

it also stores all the cells dna

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Ammonia (NH3) can be produced by the reaction of hydrogen gas with nitrogen gas:
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B) 40%  
The balanced equation indicates that for every 3 moles of H2 used, 2 moles of NH3 will be produced. So the reaction if it had 100% yield would produce (2.00 / 3) * 2 = 1.333333333 moles of NH3. But only 0.54 moles were produced. So the percent yield is 0.54 / 1.3333 = 0.405 = 40.5%. This is a close enough match to option "b" to be considered correct.
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Explanation:

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~ Good luck!
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