Step 1
The reaction involved:
2 KClO3 => 2 KCl + 3 O2 (completed and balanced)
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Step 2
Data provided:
Mass of KClO3 = 163.27 g
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Data needed:
The molar mass of:
KClO3) 122.6 g/mol
O2) 32.00 g/mol
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Step 3
Procedure:
By stoichiometry,
2 KClO3 => 2 KCl + 3 O2
2 x 122.6 g KClO3 ------ 3 x 32.00 g O2
163.27 g KClO3 ------ X
X = 163.27 g KClO3 x 3 x 32.00 g O2/2 x 122.6 g KClO3
X = 63.92 g
Answer: 63.95 g (the nearest value)