Chapter 1 - Problems - Page 20: 22

(a) $7.68~g$ This measurement has three significant figures. (b) $0.420~kg$ This measurement has three significant figures. (c) $0.073~m$ This measurement has two significant figures. (d) $7.68\times 10^5~g$ This measurement has three significant figures. (e) $4.20\times 10^3~kg$ This measurement has three significant figures. (f) $7.3\times 10^{-2}~m$ This measurement has two significant figures. (g) $2.300\times 10^4~s$ This measurement has four significant figures.

We can find the number of significant figures in each measurement. (a) $7.68~g$ This measurement has three significant figures. (b) $0.420~kg$ This measurement has three significant figures. (c) $0.073~m$ This measurement has two significant figures. (d) $7.68\times 10^5~g$ This measurement has three significant figures. (e) $4.20\times 10^3~kg$ This measurement has three significant figures. (f) $7.3\times 10^{-2}~m$ This measurement has two significant figures. (g) $2.300\times 10^4~s$ This measurement has four significant figures.