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strojnjashka [21]
3 years ago
5

Which of the following statements is true??

Chemistry
1 answer:
iren [92.7K]3 years ago
8 0
Tsunamis are caused by seismic waves
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What is the mass in grams of 2.50 mol of ammonia vapor, NH3?
Crank

Molar mass:-

\\ \tt\longmapsto 14+3(1)=17g/mol

Now

\\ \tt\longmapsto Given\:mass=No\;of\:moles\times Molar\;mass

\\ \tt\longmapsto Given\:mass=17(2.5)

\\ \tt\longmapsto Given\:mass=42.5g

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2 years ago
A chemist weighed out 20.7 g of sodium . Calculate the number of moles of sodium she weighed out
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Answer:

about 0.9 mol

Explanation:

there are 22.990 g/mol of Na

20.7/22.99 = 0.900391 mol

about 0.9 mol

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