Answered

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What is the average mass, in grams, of one atom of niobium? (NA = 6.022 × 1023 mol–1)

Sagot :

1) List known data

NA = 6.022*10^23

List unknown data

Mass in grams:

Molar mass: 92.906 g/mol

2) Find out the mass

[tex]gramsof1atomofNiobium=92.906\frac{g}{\text{mol}}\cdot\frac{1\text{mol of niobium}}{6.022\cdot10^{23}\text{atoms of niobium}}=1.543\cdot10^{-22}g[/tex]

One atom of niobium weighs 1.543*10^-22 g

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