Question

You have 4.872 x 10^34 atoms of copper. How many moles is this?

A. 7.666 x 10^32 mol
B. 2.933 x 10^58 mol
C. 1.237 mol
D. 8.093 x 10^10 mol

Answer 1

the answer is d

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Answer 2

D. 8.090 × 10¹⁰

Step-by-step explanation:

Use Avogadro’s number to convert atoms of Cu to moles of Cu.

1 mol Cu atoms = 6.022 × 10²³ atoms of Cu

Moles of Cu = 4.872× 10³⁴ × 1 /6.022 × 10²³

Moles of Cu = 8.090 × 10¹⁰ mol Cu

Thee are 8.090 × 10¹⁰ mol Cu in 4.872× 10³⁴ atoms of Cu.