The mass of a box measured by a grocer’s balance is 2.300 kg. Two go

1.	The mass of a box measured by a grocer’s balance is 2.300 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What isthe total mass of the box,the difference in the masses of the pieces to correct significant figures?
Answer» 1. Total mass of the box = 2.300 kg + 20.15 g + 20.17 g = 2.34032 kg = 2.34 kg. 2. Difference in the masses of the pieces = 20.17 g – 20.15 g = 0.02 g.

The mass of a box measured by a grocer’s balance is 2.300 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What isthe total mass of the box,the difference in the masses of the pieces to correct significant figures?

Answer»

1. Total mass of the box = 2.300 kg + 20.15 g + 20.17 g

= 2.34032 kg = 2.34 kg.

2. Difference in the masses of the pieces = 20.17 g – 20.15 g = 0.02 g.