1) How many atoms of oxygen atoms are in this formula? a) 3 b) 1 c) 2 2) How many elements are in magnesium sulfate (MgSO4)? a) 4 b) 3 c) 1 d) 2 3) What is the total amount of Na atoms found in sodium chloride (NaCl)? a) 1 b) 2 c) 3 d) 4 4) How many molecules is this? a) 1 b) 2 c) 3 5) How many different elements are in this formula? a) 2 b) 3 c) 6 6) How many molecules of this compound are there? a) 1 b) 3 c) 6 7) How many sulfur atoms are in this compound? a) 1 b) 2 c) 3 d) 4 8) How many atoms of C?  a) 2 b) 1 c) 3 d) 4 9) How many hydrogen atoms are in sugar? a) 1 b) 6 c) 12

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