Calculate the mass of NaCl in a 35-mL sample of a 1.3 M NaCl solution.

= 2.659 g NaCl

Explanation:

Molarity of a substance is given by the formula;

Molarity = moles/Volume in liters

Thus;

Number of moles = Molarity * volume in liters

= 1.3 M * 0.035 L

= 0.0455 Moles

But, the molar mass of NaCl is 58.44 g/mol

The mass of NaCl is therefore;

= 0.0455 g * 58.44 g/mol

= 2.659 g NaCl