Questions: Virtual Lab 0 - ALEKS Tutorial ALEKS - Leah Pons - Knowledge - www-awu.aleks.com/alekscgi/x/lsl.exe/1ou-IgNsIkr7j8P3jH Initial Knowledge Check Question 1 Count the significant digits in each of these measurements: measurement number of significant digits ------ 5.5 × 10^-1 mL 17700 kg 0.006700 J -6.0 × 10^-3 kJ / mol IDon't Know Submit Feels colder Now Search

Count the significant digits in the measurement $5.5 \times 10^{-1} \mathrm{~mL}$.

Identify significant digits.

In the number $5.5$, both digits are non-zero, making them significant. The scientific notation does not affect the count of significant digits.

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Count the significant digits in the measurement $17700 . \mathrm{kg}$.

Identify significant digits.

The number $17700.$ has a decimal point, indicating that the trailing zeros are significant. Therefore, all five digits are significant.

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Count the significant digits in the measurement $0.006700 \mathrm{~J}$.

Identify significant digits.

The leading zeros are not significant. The digits $6700$ are significant, including the trailing zero because it is after a decimal point.

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Count the significant digits in the measurement $-6.0 \times 10^{-3} \mathrm{~kJ} / \mathrm{mol}$.

Identify significant digits.

In the number $6.0$, both digits are significant. The scientific notation and the negative sign do not affect the count of significant digits.

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