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PLEASE ANSWER: If the valencies of two elements X and Y are 2 and 3...

PLEASE ANSWER: If the valencies of two elements X and Y are 2 and 3 respectively, write down the formula of their combination.
b. What is the valency of copper in copper (II) oxide?
In Chemistry
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Asked by UgonnaSS1 on 19th May, 2020
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