In the equation Ca (s) + 2H2O (l) - ->Ca (OH) 2 (aq) + H2 (g), list each element used as a reactant, and tell how many atoms of each are needed for this reaction.

Question

Abraham Potter

Chemistry

17 July, 17:23

In the equation Ca (s) + 2H2O (l) - ->Ca (OH) 2 (aq) + H2 (g), list each element used as a reactant, and tell how many atoms of each are needed for this reaction.

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Answers (1)

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Frederick Roy · Answer 1

See below

Explanation:

Ca + 2H2O → Ca (OH) 2 + H2

The elements involved are:

Ca - calcium H - hydrogen O - oxygen

The numbers of each atom are:

1 atom Ca 4 atoms H 2 atoms O

The 2 in front of H2O multiplies everything in the H2O.