An unknown substance has a mass of 53.9 g and occupies a volume of 35.4 mL. What is its density in g/mL?

density = mass/volume = 53.9/35.4 = ?

To find the density of a substance, you need to divide its mass by its volume. In this case, the mass is given as 53.9 g and the volume is given as 35.4 mL.

Density = Mass ÷ Volume

So, the density in g/mL is:

Density = 53.9 g ÷ 35.4 mL

To calculate this, divide the mass of 53.9 g by the volume of 35.4 mL:

Density = 1.524 g/mL

Therefore, the density of the unknown substance is 1.524 g/mL.