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25-07-2019
Chemistry

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

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MathPhys MathPhys

25-07-2019

Answer:

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

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