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# 40 g of an unknown metal combines with 2 g of hydrogen to form its corresponding hydride. What is the equivalent weight of the metal? If the metal is divalent, find the atomic weight of the element.

40 g of metal $\qquad\underrightarrow{combines\;with}\qquad 2 g of H$
Eq.wt.of metal $\qquad\underrightarrow{combines\;with}\qquad 1g of H$
Eq.wt of metal =$\large\frac{1\times 40}{2}$$=20$
Atomic weight=Eq.wt$\times$ valency=$20\times 2=40$