What is the mass of 2.01 x 10^23 atoms of lead?

Mass = 68.376 g

Explanation:

Given data:

Mass of lead = ?

Number of atoms of lead = 2.01 ×10²³ atom

Solution:

Number of moles of lead:

1 mole of lead contain 6.022×10²³ atom

2.01 ×10²³ atom × 1 mol /6.022×10²³ atom

0.33 mol

Mass of lead:

Mass = number of moles ×  molar mass

Mass = 0.33 mol ×  207.2 g/mol

Mass = 68.376 g

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b.

the accuracy of the data.