Question

How many significant figures from 0,020170 kg ? a. 3 b. 4 c. 5 d. 6 e. 7

Answer 1

> Non-zero numbers (like 1,2,3,4...) are always significant
> A zero sandwiched between two non-zero numbers is always significant
> Trailing zeros in a decimal (not whole number like million) are always significant.

0,020170 = 2.0170 × 10^-2

5 sig-figs