Question

21
density is an intensive property because it depends on the amount of substance present. (1 point)
true
false
22
what is the ratio between oxygen in nitrite to oxygen in nitrate? (1 point)
1:2
2:3
2:1
3:2

Explanation:

• Intensive properties do not depend on the amount of substance. Density is calculated as mass per unit volume ($

ho=\frac{m}{V}$). If you double the mass ($m$), the volume ($V$) also doubles, and the ratio ($
ho$) remains the same. So, the statement "Density is an intensive property because it depends on the amount of substance present" is incorrect.

• The formula for nitrite ion is $NO_{2}^{-}$ (2 oxygen atoms) and for nitrate ion is $NO_{3}^{-}$ (3 oxygen atoms). The ratio of oxygen in nitrite to oxygen in nitrate is $\frac{2}{3}$, which is $2:3$.

Answer:

1. B. False
2. B. 2:3