A sample of 10 dm3 of polluted air at, When 0.1g of a metal hydride MH was allowed , The element germanium was an important component of transistors
PROBLEM: A sample of 10 dm3 of polluted air at s.t.p. is passed through lime water so that all the CO 2 present is precipitated as CaCO 3 . The mass of CaCO 3 formed is 0.05g. What is the percentage by volume of CO 2 the air sample? SOLUITON: Ca(OH) 2 + CO 2 CaCO 3 + H2O Number of moles of CaCO 3 formed = 0.05 / 100 ...