Question

which among the following contains 12 atoms of oxygen ?
(a) 6 molecules of calcium oxide
(b) 6 molecules of water
(c) 3 molecules of sodium bicarbonate
(d) 4 molecules of calcium carbonate​

Answer 1

Answer:

6 molecules

Explanation:

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Answer 2

Answer:

yes, the answer is (D)

because the formula of calcium carbonate is CaCO3 and there are 4 molecules of CaCO3

so,

If we multiply it by 4 ( 4 × CaCO3 )

then we'll get 12 atoms of oxygen

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