How many significant figures are there in the measured values
(i)227.2 g , (ii)3600 g and (iii)0.00602 g

Explanation

(i) 227.2 g has all the non-zero digits. Hence, it has four significant figures.
(ii) According to rule number 3, trailling zeroes are not significant.
Hence, 3600 g has 2 significant figures.
(iii) 0.00602g. According to the rule number 5, the zeroes at the beginning are not significant.
Hence, 3 significant figures.