count the significant digits in each of these measurements: measurement number of significant digits - 5.0 ×…
count the significant digits in each of these measurements: measurement number of significant digits - 5.0 × 10^(-3) kj/mol 3 6.0 × 10^(-1) ml 0.003300 j 2900. kg
Answer
Explanation:
Step1: Recall significant - digit rules
Non - zero digits are always significant. Zeros between non - zero digits are significant. Leading zeros (zeros before non - zero digits) are not significant. Trailing zeros in a number with a decimal point are significant.
Step2: Analyze $6.0\times10^{-1}\text{ mL}$
The number $6.0\times10^{-1}$ has 2 significant digits. The 6 is non - zero and the 0 is between the non - zero digit and the decimal point.
Step3: Analyze $0.003300\text{ J}$
The leading zeros are not significant. The non - zero digits 3, 3 and the trailing zeros 0, 0 are significant. So there are 4 significant digits.
Step4: Analyze $2900.\text{ kg}$
The decimal point indicates that the trailing zeros are significant. So there are 4 significant digits.
Answer:
| measurement | number of significant digits |
|---|---|
| $6.0\times 10^{-1}\text{ mL}$ | 2 |
| $0.003300\text{ J}$ | 4 |
| $2900.\text{ kg}$ | 4 |