Question

quiz - measurement, density, %error & sig figs
a brick has a density of 3.52 g/ml and a volume of 12 ml. what is the mass of the brick?
0.29 g
3.4 g
17.5 g
42.2 g

Explanation:

Step1: Recall density formula

$\text{density}=\frac{\text{mass}}{\text{volume}}$, or $
ho=\frac{m}{V}$.

Step2: Rearrange formula for mass

$m =
ho\times V$.

Step3: Substitute given values

$m=3.52\ g/mL\times12\ mL$.

Step4: Calculate mass

$m = 42.24\ g$. Rounding to one - decimal place gives $42.2\ g$.

Answer:

D. 42.2 g