How many moles of calcium are in a sample of 40 g?

Question

maddymoodles · Answer

40 grams ÷ 40.08 grams/moles = 1 mole

maddymoodles · Answer

The 40 g sample of calcium contains approximately 0.997 moles of calcium, which can be rounded to about 1 mole for simpler calculations. This is calculated using the molar mass of calcium, which is approximately 40.08 g/mol. The formula used is the number of moles = mass (g) divided by molar mass (g/mol). 
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How many moles of calcium are in a sample of 40 g?

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