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What is the total number of oxygen atoms in the formula MgSO4•7H2O? [The • represents seven units of H2O attached to one unit of MgSO4.]
(1) 11 (3) 5
(2) 7 (4) 4



Answer :

11.
O4 means 4 atoms of oxygen. H2O
has one atom of oxygen, so seven "units" of
H2O has 7.

Answer:

11

Explanation:

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