QuestionCount the significant digits in these measurements: $3.2 \times 10^{-2} \mathrm{~mL}$, $0.009500 \mathrm{~J}$, $-1.0 \times 10^{-1} \mathrm{~kJ/mol}$, $92500 \mathrm{~kg}$.

Studdy Solution
Finally, let's look at the fourth measurement $92500 . \mathrm{kg}$. Here, the trailing zeros are not significant because they are not to the right of a decimal point.
$$Number\, of\, significant\, digits =3$$So, the number of significant digits in each measurement are\begin{tabular}{|c|c|} \hline measurement & $\begin{array}{c}\text { number of } \\ \text { significant } \\ \text { digits }\end{array}$ \\ \hline $3.2 \times10^{-2} \mathrm{~m}$ & $2$ \\ \hline $0.009500 \mathrm{~J}$ & $4$ \\ \hline$-1.0 \times10^{-1} \mathrm{~kJ} / \mathrm{mol}$ & $2$ \\ \hline $92500 . \mathrm{kg}$ & $3$ \\ \hline\end{tabular}