A sample of a mixture of and is heated. After complete decomposition, of is collected at STP and of water is produced. The percentage of in the mixture is

Question

A  sample of a mixture of  and  is heated. After complete decomposition,  of  is collected at STP and  of water is produced. The percentage of  in the mixture is

Canvas Classes · Accepted Answer

Strategy:
 Heating a mixture of bicarbonate and carbonate causes only the bicarbonate to decompose (at moderate temperatures). The mass of water produced is directly proportional to the amount of bicarbonate in the original mixture.

Step 1: Analyze the decomposition

1 mole of water () is produced from 2 moles of  ().

Step 2: Calculate from water mass
Given:  of water .
Moles of .
Mass of .

Step 3: Find percentage

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