Which aqueous solution has higher concentration`:1` molar or 1 molal solution of the same solute ?

Explanation

1 molar aqueous solution has higher concentration than 1 molal solution.
A molar solution contains one mole of solute in one litre of solution while a one molal solution contains one mole of solute in 1000 g of solvent.
If density of water is 1, then one mole of solute is present in 1000 mL of water in 1 molal solution while one mole of solute is present in less than 1000 mL of water in 1 molar
solution (1000 mL solution = amount of solute + amount of solvent). Thus, 1 molar solution is more concentrated.