Express the sum 1.00 kg + 1531 g + 2.54 × 10⁴ mg in kilograms with the correct number of significant figures. A)2.56 kg B)27.9 kg C)2.53 kg D)2.79 kg

Question

Quizplus · Accepted Answer

First, convert all masses to kilograms: 1531 g = 1.531 kg and 2.54 × 10^4 mg = 2.54 × 10^1 g = 0.0254 kg. Adding these to 1.00 kg gives 1.00 kg + 1.531 kg + 0.0254 kg = 2.5564 kg, which rounds to 2.56 kg with three significant figures.

Express the Sum 1