Question

There are 342 g of sucrose in 1.00 mol of sucrose. What is the molar concentration (molarity) of a solution containing 171 g sucrose in 1.25L solution?

Answer 1

molarity is defined as the number of moles of solute (in this case sucrose) per liter of solution.
To calculate the moles of sucrose in a given mass of sucrose you have to divide the given mass by the molecular mass.
n= mass/MM

To find the molarity of that solution you have to divide the number of moles (calculated in the previous sentence) by the volume of solution in liters.

molarity= n/V(liters)