Consider Two Equal-Volume Flasks of Gas at the Same Temperature $\frac { 32 } { 38 }$

Multiple Choice

Consider two equal-volume flasks of gas at the same temperature and pressure. One gas, oxygen, has a molecular mass of 32. The other gas, nitrogen, has a molecular mass of 28. What is the ratio of the number of oxygen molecules to the number of nitrogen molecules in these flasks?

A) $\frac { 32 } { 38 }$
B) $\frac { 28 } { 32 }$
C) $\sqrt { \frac { 28 } { 32 } }$
D) $\sqrt { \frac { 32 } { 28 } }$
E) $\frac { 1 } { 1 }$