Question

The density of many aqueous solutions is approximately the same as water: 1.00g/mL. For these solutions, molarity is ____ molality.

Answer choices: greater than, the same as or less than

Answer 1

answer : the same as

explanation :

for a probelm : let is take one problem as an example

a. 2.89 g of NaCl dissolved in 0.159 L of water (density of water is 1.00 g/mL)

molarity = moles / volume

              =( 2.89 / 58.5 ) x 1 / 0.159

               = 0.311 M

molality = moles / mass of solvent

              = ( 2.89 / 58.5 ) x 1 / 0.159 kg

               = 0.311 m