Question

what volume of glycerine C3H8O3, with a density of 1.26 g/mL should be taken to obtain 2.50 ml of glycerine?

Answer 1

what volume of glycerine CHO with 1.26 must be taken to obtain 2.50 mole of glycerine

Answer 2

Answer to this question

Answer 3

Given number of moles to be 2.5mol, we can use it and the molar mass of glycerine which is 92.11g/mol to determine it's mass. That is,
m=nMr
m=2.50mol*92.11g/mol
m=230g
Density is s ratio of the mass and the volume, so we use this relationship to find the volume to obtain 2.5mol,C3H8O3
V=m/D
V=230g/1.26g/ml
V=183ml