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A sample of propane (20.4 g) is burned in 82.3 g of oxygen in a chemical...

A sample of propane (20.4 g) is burned in 82.3 g of oxygen in a chemical reaction to produce water and carbon dioxide (CO2). If 75.5 g of CO2 is formed, how much water, in grams, was also produced?

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Answer #1

If 75.5 g of CO2 is formed

C3H8    + 5 O2   ---------------------> 3 CO2 + 4 H2O

44.1 g       160 g                                 132 g       72 g

?    ?                            75.5 g

132 g of CO2 ------------------> 72 g of H2O

75.5g of CO2   ---------------->     ?? H2O

mass of water produced = 41.2 g

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