# What is the mass of 0.045 moles of calcium oxide?

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Mass of 1 mole of CaO (from periodic table)= 40.078g + 15.999g = 56.077g/mole. Thus 0.045mole*56.077 g/mole = 2.523 g or 2.5 g using significant figures.

Posted on Dec 11, 2014

• Edmund Perozzi Dec 11, 2014

Mass of 1 mole of CaO (from periodic table)= 40.078g + 15.999g = 56.077g/mole. Thus 0.045mole*56.077 g/mole = 2.523 g or 2.5 g using significant figures.

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