Calcium carbonate is reported to be 40.0 % calcium by mass with an uncertainty of
PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
Calcium carbonate is reported to be 40.0\% calcium by mass with an uncertainty of ±0.2%. What is the maximum possible mass of calcium, expressed with the correct number of significant figures, that could be present in a 1.250 g tablet assumed to be pure calcium carbonate?
(a) 0.500g
(b) 0.502g
(c) 0.503g
(d) 0.498g