Question

Calculate the moles of ethnol in 5 litre of its 2m solution if the density of the solution 0.981 kg/ l

Answer 1

5×.981=4.905

4.905÷46= .1066

thank you

Answer 2

5l of solution
density=.981kg/l
mass =0.981*5=4.905kg
molality=2moles/kg
moles=molality*mass=2*4.905=9.810moles