If I ml of water contains 20 drops. Then no. of molecules in adrop of water is(AFMC 2010](a) 6.023x10^' molecules (b) 1.376x1020 molecules(c) 1.344x10'molecules (d) 4.346x1020 molecules

If I ml of water contains 20 drops. Then no. of molecules in adrop of

1.	If I ml of water contains 20 drops. Then no. of molecules in adrop of water is(AFMC 2010](a) 6.023x10^' molecules (b) 1.376x1020 molecules(c) 1.344x10'molecules (d) 4.346x1020 molecules
Answer» Density of water 1gm/ml so 1ml=1gm mol.mass of water =18 gm so 1MG = 1/18 MOLE= 3.34 * 10^ 22 molecules 1 ml= 20 drops 1 drop= 1.67*10^21 molecules