Answer:
115.936g
Explanation:
Ca(ClO3)2 -->CaCl2 +3 O2
One mole of calcium chlorate give up three moles of oxygen.
Molar mass of calcium chlorate is
40+(35.5+16*3)*2 = 207g/mol
Therefore there are
250g/207=
1.207mol of calcium cholrate...
So 1.207*3=3.623mol
Therefore 3.623mols of Oxygen must be produced.
Mass of the oxygen gas is equal to 3.623mol*32g/mol =115.936g
(O2 molar mass 32g/mol)
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