Question

An oxide of metal have 20% oxygen , the equivalent weight of oxide is?

Answer 1

the answer is calcium

Answer 2

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→20% oxygen in the oxide

∴ 20 grams of oxygen in 100 grams of oxide

∴ mass of metal = 100-20

=80grams.

$\dfrac{metal:\mass}{oxygen:\mass}:\=\dfrac{eq.:\ mass:\of:\metal}{equi.:\mass:\of:\oxygen}$

80/20 = E /8

E = 32 g

so , equivalent weight of oxide

=32+16

=48g