## Chemistry (4th Edition)

e) $1\times10^{-5}$
$(6.266-6.261)\div522.0 = 0.005\div522.0$ Here, 0.005 is the operand with the least significant figures. Number of significant figures in 0.005 = 1. The final answer should be rounded to one significant figure. Hence, $0.005\div522.0$ = $1\times10^{-5}$