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Solution A : calcium hydroxide

Solid B : calcium oxide

Gas C : Hydrogen gas

Explanation:

i) When metals react with water they form hydroxides thus calcium hydroxide

ii) When metals eact with oxygen they form oxides.

iii) Wehn metals react with hydrochloric acid they form a salt and a gas hydrogen.

HOPE THIS HELPED

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).