Calculate the moles and the mass of solute in 500.0 mL of 2.00 M HCl.

Question

Quizplus · Accepted Answer

To calculate the moles of solute, we use the formula:
moles = molarity x volume (in liters)

Converting 500.0 mL to liters:
500.0 mL x (1 L / 1000 mL) = 0.500 L

Using the formula:
moles = 2.00 M x 0.500 L = 1.00 moles

To calculate the mass of solute, we use the formula:
mass = moles x molar mass

The molar mass of HCl is equal to the atomic mass of hydrogen (1.008 g/mol) plus the atomic mass of chlorine (35.45 g/mol), which gives us a molar mass of 36.46 g/mol.

Using the formula:
mass = 1.00 moles x 36.46 g/mol = 36.5 g

Therefore, the best choice is C.

Calculate the Moles and the Mass of Solute in 500