Q90E - Chemistry (OpenStax)

Question

Question: Calculate these masses 

a) What is the mass of 4.00 cm³ of Sodium, density = 0.97 g/cm³?

b) What is the mass of 125 mL gaseous chlorine, density = 3.16 g/L?

Step-by-Step Solution

Answer

a) Mass of Sodium = 3.9 g

b) Mass of gaseous chlorine = 0.395 g

Step 1: Determine the mass of Sodium

\(\begin{array}{c}Density = \frac{{mass}}{{volume}}\\mass = density \times volume\\mass = 0.97g/c{m^3} \times 4.00c{m^3}\\mass = 3.9g\end{array}\)

Step 2: Determine the mass of gaseous chlorine

\(\begin{array}{c}mass = density \times volume\\Given,\\volume = 125mL\\Density = 3.16g/L\\1mL = 0.001L\\mass = density \times volume\\mass = 3.16g/L \times 0.125L\\mass = 0.395g\end{array}\)