Convert the following
2.1kmtom
We know that,
1km=1000m
So,
2.1km=2110×1000m=2100m
Hence, the required answer is 2100m.
The hardness of a water sample containing 10-3MMgSO4 expressed as CaCO3 equivalents (in ppm)is (molar mass of MgSO4is 120.37g/mol)