If 250 g of calcium chlorate decomposes into calcium chloride and oxygen what mass of oxygen would be produced

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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