Question

A water sample shows 0.009 grams of some trace element for every cubic centimeter of water. Jai uses a container in the shape of a right cylinder with a radius of 9.2 cm and a height of 12.6 cm to collect a second sample, filling the container all the way. Assuming the sample contains the same proportion of the trace element, approximately how much trace element has Jai collected? Round your answer to the nearest tenth.

Answer 1

Volume = πr^2h = π(9.2^2)(12.6) = π(84.64)(12.6) ≈ π(1066.464) ≈ 3350.395 cm^3.

Trace element mass = 0.009 g/cm^3 × 3350.395 cm^3 ≈ 30.1536 g ≈ 30.2 g (to the nearest tenth).