A sample of calcium oxide has mass of 2.80 g. The molar mass of CaO is 58.08 g/mold how many moles of CaO does this sample contain

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Chemistry

4 March, 00:02

A sample of calcium oxide has mass of 2.80 g. The molar mass of CaO is 58.08 g/mold how many moles of CaO does this sample contain

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Julien Friedman · Answer 1

Hi!

To convert grams to moles, you need to divide the amount (grams) of your substance by its molar mass, both of which are given to you.

28 g CaO / 58.08 g/mol CaO = 0.4820936639 moles of CaO

(And 28 contains two significant digits, so you will round this to 0.48 moles.)

Good luck!