Question

A chemistry student needs 85.0 mL of chloroform. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of chloroform is 1.48 g•cm^-3. Calculate the mass of chloroform the student should weigh out.

a) 125.8 g
b) 95.0 g
c) 63.5 g
d) 56.8 g

Answer 1

The student should weigh out 125.8 grams of chloroform, using the given density of 1.48 g•cm^-3 and the desired volume of 85.0 mL.

Step-by-step explanation:

To calculate the mass of chloroform the chemistry student needs, we use the density formula:

Density = Mass/Volume

We are given the density of chloroform, which is 1.48 g•cm-3, and the volume required, which is 85.0 mL. Since 1 mL is equivalent to 1 cm3, we can rearrange the formula to solve for mass:

Mass = Density × Volume

Mass = 1.48 g/cm3 × 85.0 cm3

Mass = 125.8 g

Therefore, the student should weigh out 125.8 grams of chloroform.