molarity (M) = moles/litre of solution
To make a 1.0 M sucrose solution, you need the molar mass of sucrose. C12H22O11
(12x12.0) + (22x1.0) + (11x16.0) = (according to wikipedia 342.30 g/mole)
Take the 342.20 grams of sucrose and put it into a graduated cylinder and then fill to the 1.0 L mark with water.