Question

if the density of methanol is 0.793 kilogram litre what is its volume needed for making 2.5 Litre of its 0.25 M solution​

Answer 1

Explanation:

Mass of methanol required is

M=Volume of solution×Molariy of solution×Molar mass of methanol

=2.5×0.25×32=20 g.

Volume of methanol needed =

density

mass

=

0.793

20

=25.22 mL.

Answer 2

Explanation:

Mass of methanol required is

M = Volume of solution*Molarity of solution*Molar mass of

methanol

= 2.5*0.25*32 = 20g

Volume of methanol needed = mass/density

= 20/0.793

= 25.22ml