if 7.5g of urea, (NH2)2CO is dissolved in 500g of water (density of resulting solution is 1.25g/mml). what is the molar concentration of the solution?

Answer 1

M = mols/L
mols = g/molar mass = 7.5/60 = 0.125
volume = mass/density = 500/1.25 = 400 mL = 0.400 L
M = 0.125 moles/0.400 L = ?