A sample of ammonia has a mass of 51 g. How many molecules are in this sample?

Chemistry

1 answer:

pantera1 [17]4 years ago

3 0

M(NH₃)=51g, n(NH₃)=m/M=51g÷17g/mol(14+3×1)=3mol
N(NH₃)=n×Na(Avogadro number)=3mol×6·10²³1/mol=18×10²³ molecules

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If a 10.0ml sample of unknown liquid has a mass of 7.553g what is the density of the unknown liquid

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<h3>What is density?</h3>

Density is the measurement of how tightly a material is packed together.

Given data:

Weight =7.553g

Volume = 10.0ml

Density = $\frac{mass}{volume}$