Answer
total mass of graduated cylinder = 130.0 g
Work Step by Step
The total mass of graduated cylinder is the sum of all the masses:
total mass of graduated cylinder = the mass of graduated cylinder + the mass of water+ mass of sodium chloride
total mass of graduated cylinder = 66.5 g + 58.2 g + 5.279 g
total mass of graduated cylinder = 129.979 g
As sodium chloride is given in four significant figures, then:
total mass of graduated cylinder = 130.0 g ( to four significant figures)