Multiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits.

Question

20.9476 g/mL X 40. mL = [ ] g

2.09476 cm X 2.25 cm = [ ] cm^2

806.18 mol / 0.54 L = [ ] mol/L

Answer 1

When multiplying or dividing, the answer should have no more significant digits than the least number of significant digits in the numbers being multiplied or divided.

20.9476 g/mL X 40. mL = 837.904 g = 840 g (rounded to 2 s.f. based on 40. ml having 2 s.f.)

2.09476 cm X 2.25 cm = 4.71321 cm² = 4.71 cm² (rounded to 3 s.f. based on 2.25 having 3 s.f.)

806.18 mol / 0.54 L = 1,492.93 mol/L = 1500 mol/L (rounded to 2 s.f. based on 0.54 having 2 s.f.)