Can someone explain how to solve:
1. Determine the % relative error for the following quantity: (5.47±0.05) + (0.47±0.03) - (0.87±0.02)
2. Determine the absolute error for the following quantity: 0.821mol × 36.46g/mol ÷ 0.321g/mL
3. Determine the % error for the following quantity: 12.53 cm x 99.4 cm