Question

Large doses of vitamin c are supposed to cure the common cold. one commercial over-the-counter product consists of 500.0-mg tablets that are 20.0% by weight vitamin

c. how many tablets should one take for a 0.92 g dose of vitamin c? assume that the tablets can be accurately dived. therefore express your answer to the correct number of significant figures.

Answer 1

Weight of one tablet = 500mg Percentage of vitamin C in one tablet, by weight = 20 % Amount of vitamin C in one tablet is 20% of 500 mg (A) = 500 * 20/100 = 100 mg Amount of vitamin C required for a dose (B) = 0.92 g = 920 mg Number of tablets that need to be taken for a 0.92 g dose is obtained by dividing (B) by (A) = 920/100 = 9.2 So, one should take 9.2 tablets for a 0.92 g dose of vitamin C.