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The equivalent mass of calcium in calciu...

The equivalent mass of calcium in calcium oxide is 20. find the percentage composition of calcium oxide.

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Equivalent mass of calcium in calcium oxide=20
`therefore`20g calcium combines with 8g oxygen in calcium oxide.
`therefore`amount of calcium in calcium oxide`=(20)/((20+8))xx100`
`=71.43%`
`therefore`Amount of oxygen in calcium oxide
`=(8)/((20+8))xx100=28.57%`.
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