Which is true about an aqueous solution of sodium chloride? one that has 30.0 grams of nacl dissolved in 100 grams of water is would have the same molarity as one that has 15.0 grams of nacl dissolved in 100 grams of water?

Molarity when 30g is dissolved in 100g of water = 0.5128moles / dm^3

Molarity when 15g is dissolved in 100g of water = 0.2564moles/dm^3

Therefore the statement is not right, as the 15g has exactly half the molarity as the 30 g one. molarity only changes if the volume changes or the mass of the salt changes, it's given by the equation "number of moles X volume"