noahcordle noahcordle

24-01-2021
Chemistry

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A sample of magnesium oxide has a mass of 94.4 g. How many molecules
are in this sample?
molecules of magnesium oxide

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ihlester ihlester

24-01-2021

Answer: 1.414x10^24 molecules in 94.4g MgO

Explanation: molar mass MgO 40.204

molecules in 40.204 g MgO = avogadro number

molecules in 94.4 g MgO = (94.4/40.204)*avogadro number

(94.4/40.204)*6.02214076*10^23 = 14.14x10^23

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