Answer
The mass of this cube of silver is equal to $2.5 \times 10^3kg$
Work Step by Step
1. Calculate the cube's volume:
$0.62$ $m \times \frac{1cm}{10^{-2}m} = 62$ $cm$
$Volume (cube) = (side lenght)^3 = (62cm)^3 = 2.4 \times 10^5cm^3$
2. Now, find the mass of this silver cube:
$2.4 \times 10^5 cm^3 \times \frac{10.5g}{1cm^3} = 2.5 \times 10^6g$
$2.5 \times 10^6g \times \frac{1kg}{10^{3}g} = 2.5 \times 10^3kg$