A molecule of $\mathrm { Fe } _ { 2 } \mathrm { O } _ { 3 }$ consists of 2 iron atoms and 3 oxygen atoms. How many total atoms do y molecules contain?
A) $2 y + 3$
B) $y + 5$
C) $5 y$
D) $6 y$
E) $5 + 2 y$

Question

Quizplus · Accepted Answer

Each molecule of $\mathrm{Fe}_2\mathrm{O}_3$ contains 5 atoms (2 iron + 3 oxygen). Therefore, $y$ molecules contain $5y$ atoms.

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A Molecule Of $\mathrm { Fe } _ { 2 } \mathrm { O } _ { 3 }$