The correct statements are

1.	The correct statements are
Answer» The isotopes of chlorine with mass NUMBER 35 and 37 EXIST in ratio `3:21` if its average atomic mass is 35.5 The mass of one amu is APPROXIMATELY `1.6xx10^(-24)g` The number of molecules in 1 ml of a gas at STP is called Loschmidt number If `6.023xx10^(21)` molecules of a solute are present in 100 ml SOLUTION molarity of solution is 0.1M Solution :a) `35.5=(75xx35+25xx37)/(100)` d) Molarity = `("No. of molecules of solute")/(6.023xx10^(23))xx(1000)/("volume of solution in ml")` Molarity = `(6.023xx10^(21))/(6.023xx10^(23))xx(1000)/(10)=0.1M`

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