The correct statements are

Options

A. The isotopies of chlorine with mass number 35 and 37 exist in ratio 3:21 if its average atomic mass is 35.5
B. The mass of one amu is approximately `1.6xx10^(-24)g`
C. The number of molecules in 1 ml of gas at STP is called Loschmidt number
D. If `6.023xx10^(21)` molecules of a solute are present in 100 ml solution molarity of solution is 0.1 M

Answer

A, B, C, D