In two separate experiments, 0.36g and 0.71g of chlorine combined with a metal X to give Y and Z respectively. An analysis showed that Y and Z contain 0.20g and 0.40g of X respectively. The data above represents the law of ?

  • A multiple proportion
  • B conservation of mass
  • C constant composition
  • D reciprocal proportion
jamb 1991chemistry

The correct answer is C. constant composition

0.36g of Cl combines with 0.2g of x

1g of Cl will combine with \(\frac{1 \times 0.2}{0.32}\) = 0.56

0.71g of U combines with 0.49g of x

1g of U will combine with \(\frac{1 \times 0.4}{71}\) = 0.56

Ratio 0.56 : 0.56 = 1:1

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