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Sergeeva-Olga [200]
3 years ago
10

Define the mass number of an atom

Chemistry
1 answer:
aivan3 [116]3 years ago
7 0

Answer:

The mass number of an atom, which is also called the atomic mass number,  is the total number of protons and neutrons in an atom,

Explanation:

Hope this is helpful.

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3 years ago
7.5 moles of nitrogen gas (N2) is formed in the following reaction. How many grams
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Answer:

Mass = 255 g

Explanation:

Given data:

Number of moles of nitrogen = 7.5 mol

Mass of ammonia formed = ?

Solution:

Chemical equation:

3H₂ + N₂      →    2NH₃

Now we will compare the moles of nitrogen and ammonia.

             N₂         :        NH₃

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