Question

Calculate the number of moles of hcl in 25.50 g of 1.0 m hcl solution. assume that the density of the hcl solution is 1.00 g/ml.

Answer 1

density can be calculated using the following rule:
density = mass / volume
This means that:
volume = mass / density
volume = 25.5 / 1 = 25.5 ml

molarity can be calculated using the following rule:
molarity = number of moles of solute / volume of solution
This means that:
number of moles = molarity x volume of solution
number of moles = 1 x 0.025 liters = 0.025 moles