Question

Use the 5-step method and be sure to include units where appropriate. Round your answers to the correct number of significant digits.
Adjust the density formula and solve the problems below:

What is the mass of a 1350 cm3 sample of pure silicon with a density of 21.336 g/cm3?

Answer 1

Question

Use the 5-step method and be sure to include units where appropriate. Round your answers to the correct number of significant digits.

Adjust the density formula and solve the problems below:

What is the mass of a $1350~\mathrm{cm}^3$ sample of pure silicon with a density of $21.336~\mathrm{g/cm^3}$?

Solution

The equation for density is

$$\rho = m V,$$

where $\rho$ – density, $m$ – mass and $V$ – volume. So

$$m = \rho \cdot V$$

We know that $V = 1350~\mathrm{cm}^3$ and $\rho = 21.336~\mathrm{g/cm^3}$.

Substituting the given values into the equation we can obtain the mass:

$$m = 21.336~\mathrm{g/cm^3 \cdot 1350~cm^3 = 28800~g}$$