How many moles are there is 140 g of Si (atomic mass of silicon is 28)?

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How many moles are there is 140 g of Si (atomic mass of silicon is 28)?

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anonymous · Answer 1 · 2021-06-20T13:29:05+0000

To convert the mass of silicon to the number of moles, it will be divided by its molar mass. The answer is A) 5 but there should be 3 significant figures.

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How many moles are there is 140 g of Si (atomic mass of silicon is 28)?

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