A nanotechnology equipment requires 7.40 x 10^18 atoms of potassium. What is the mass of this sample?

Question

Ashlee Salinas

Chemistry

20 July, 09:20

A nanotechnology equipment requires 7.40 x 10^18 atoms of potassium. What is the mass of this sample?

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Answers (1)

Know the Answer?

Gloria Ferguson · Answer 1

4.81*10⁻⁴ g K

Explanation:

Convert atoms to moles:

7.40*10¹⁸ atoms K * (1 mol K / 6.02*10²³ atoms) = 1.23*10⁻⁵ mol K

Convert moles to mass:

1.23*10⁻⁵ mol K * (39.1 g K / mol K) = 4.81*10⁻⁴ g K