Multiply a Subscript by the Number of Molecules - Practice 2

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A subscript states how many atoms of an element are in one molecule. A number of molecules multiplies that count. Do not change the formula's subscripts to count a larger sample.

Worked example

Three CO2 molecules contain 3 x 2 = 6 oxygen atoms and 3 carbon atoms.

Three separate CO2 molecule models each show O-C-O. Together they contain three carbon atoms and six oxygen atoms. The connecting lines are schematic, not a complete bond representation.

Question 1 How many oxygen atoms are in 7 molecules of CO2? Answer

Question 2 How many oxygen atoms are in 8 molecules of CO2? Answer

Question 3 How many oxygen atoms are in 9 molecules of CO2? Answer

Question 4 How many oxygen atoms are in 10 molecules of CO2? Answer

Question 5 How many oxygen atoms are in 11 molecules of CO2? Answer