Question

count the significant digits in each of these measurements: measurement number of significant digits 0.00500 j - 8.0×10⁻² kj/mol 9.5×10⁻¹ ml 68100. kg

Explanation:

Step1: Identify significant - digit rules

Non - zero digits are always significant. Leading zeros are not significant. Trailing zeros after a decimal point are significant.

Step2: Analyze 0.00500 J

The leading zeros are not significant. The non - zero digits 5, 0, 0 are significant. So there are 3 significant digits.

Step3: Analyze - 8.0×10⁻² kJ/mol

Both 8 and 0 are significant. So there are 2 significant digits.

Step4: Analyze 9.5×10⁻¹ mL

Both 9 and 5 are significant. So there are 2 significant digits.

Step5: Analyze 68100. kg

The trailing zero after the decimal point makes all the digits significant. So there are 5 significant digits.

Answer:

3
2
2
5