My Identify the pair of substances having the same formula unit mass.

1.	My Identify the pair of substances having the same formula unit mass.
A.	Calcium chloride, potassium carbonate
B.	Calcium oxide, hydrochloric acid
C.	Carbon monoxide, ammonia
D.	Carbon dioxide, nitrous oxide
Answer» E.

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My Identify the pair of substances having the same formula unit mass.

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