Question

How many grams of CO2 are produced if 2.09 moles of hydrochloric acid are reacted with

calcium carbonate?

Answer 1

The molar mass of CO2 = 44.01 g/mol

Step-by-step explanation:

Start with 2.09 moles of HCl and convert to moles of CO2 For every 2 moles of HCl used, 1 mole of CO2 is formed.

2.09 mol HCl •(1 mol CO2/2 mol HCl) = 1.045 mol CO2

Now convert moles of CO2 to grams using the molar mass.

1.045 mol CO2 • 44.01 g/mol = 45.99 grams CO2

3 significant figures = 46.0 grams CO2

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