Question

The active mass of water at 4C is

Answer 1

Answer:

for water

density = 1g/ml = 1000g/l

molar mass = 18.015g/mole

so

1000g/l= (1000g/l)(18.015 g/mole)=55.51 mole/l

hope this help you

Answer 2

For water,  

density = 1 g/mL = 1000 g/L  

Molar mass = 18.015 g/molar mass  

so  

1000 g/L = (1000 gram/Litre)/(18.015 gram/molarmass) = 55.51 molarmass/Litre