Calculate the density of methanol (CH3OH) ?

This question is incomplete so because of unavailability of proper information i will simply let you understand this by an example:

lets say you have 4.2 moles of methanol in 5.67 L.

Firstly convert the moles into mass

mass = moles x molar mass of methanol

mass = 4.2 moles x 32.05 g/mol = 134.61 g

Density = mass / vol

convert 5.67L into mL which is 5670mL

putting values

134.61 / 5670 mL = 0.0237 g/mL

hope you get it!