How many grams of NH4Cl will be needed to make a 1L solution with a concentration of 4.5M?

Molarity is defined as the number of moles of solute in volume of 1 L solution.

The molarity of solution to be prepared is 4.5 M

the volume of solution to be prepared is 1 L

therefore number of moles in 1 L - 4.5 mol

mass of NH₄Cl required - 4.5 mol x 53.5 g/mol = 240.8 g

A mass of 240.8 g of NH₄Cl is required to make a solution of 4.5 M