Natural abundance of heavy water in water is 1: 6000. How many heavy water molecules are present in one drop of water ? (one mL water is 20 drops)

Natural abundance of heavy water in water is 1: 6000. How many heavy w

1.	Natural abundance of heavy water in water is 1: 6000. How many heavy water molecules are present in one drop of water ? (one mL water is 20 drops)
Answer» Solution :ONE mL water =one gram (d=1 g per mL) weight of one drop of water `=(1)/(20)g` weight of `D_(2)O` in one drop of water `=(1)/(20 xx 6000)g` Number of moles of `D_(2)O =("weight")/(GMW)=(1)/(20 xx 6000 xx 20)` Number of `D_(2)O` molecules =Number of moles `xx N_(A)` `=(6.022 xx 10^(23))/(20 xx 6000 xx 20)=2.51 xx 10^(17)` Number of HEAVY water molecules is `2.51 xx 10^(17)`