How many moles of calcium are in a 351 kg sample? use "e" for "*10" and use significant figures?

Question

Chemistry

Warren Romero

21 January, 15:42

How many moles of calcium are in a 351 kg sample? use "e" for "*10" and use significant figures?

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Answers (1)

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Rowan Ross · Answer 1

In order to know the number of moles from the given mass, the conversion factor to be used is the average atomic mass of Calcium which is equal to 40.08 g/mol. But first, let's convert mass from grams to kilograms knowing that there are 1,000 g in every 1 kg.

Mass = 351 kg * 1,000g/1 kg = 351,000 grams

Number of moles = 351,000 g * 1 mol/40.08 g = 8,757.5 moles Calcium