Question

An experiment requires 40.3 of ethyl alcohol. If the density of ethyl alcohol is 0.790 g/(cm³), what is the mass of 40.3 mL of ethyl alcohol

Answer 1

Density is the mass per unit volume of a substance. Mathematically, it is expressed as:

Density = Mass/Volume.

We can rearrange the above equation to get mass as:

Mass = Density x Volume

Now, use the given values of density and volume to calculate the mass of 40.3 mL of ethyl alcohol:

Mass of 40.3 mL of ethyl alcohol

= 40.3 mL x 0.790 g/cm³

= 40.3 mL x 0.790 g/mL

= 31.837 g = 31.8 g (approximately)

Note : 1.00 cm³ = 1.00 mL