Answer
total mass of beaker= 14.55 g ( to four significant figures)
Work Step by Step
The total mass of the beaker ( before reaction) is the sum of all the masses:
total mass of beaker= the mass of beaker+ the mass of iron pallet + mass of hydrochloric acid
total mass of beaker= 53.10 g + 5.348 g + 56.1 g
total mass of beaker= 14.548 g
As iron pallet is given in four significant figures, then:
total mass of beaker= 14.55 g ( to four significant figures)
