What is the mass in grams of 9.76 × 10¹² atoms of naturally occurring sodium? A)22.99 B)1.62 × 10^-11 C)3.73 × 10^-10 D)7.05 × 10^-13 E)2.24 × 10¹⁴

Question

Quizplus · Accepted Answer

The molar mass of sodium is 22.99 g/mol. Therefore, to find the mass of 9.76 × 10^21 atoms, we need to convert this quantity to moles first:

9.76 × 10^21 atoms / 6.022 × 10^23 atoms/mol = 0.0162 mol

Then, we can use the molar mass to convert to grams:

0.0162 mol x 22.99 g/mol = 0.373 g

Therefore, the mass of 9.76 × 10^21 atoms of sodium is 0.373 grams or 3.73 × 10^-10 grams, which is closest to choice C.

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