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**Unformatted text preview: **c. ::r 2 ~ "/' 5. A student performed an analysis of a sample for its calcium content and got the following results: 14.92% 14.88% 14.91 % 14.91 % The actual amount of calcium in the sample is 15.70%. What conclusions can you draw about the accuracy and precision of these results? 6. Compare and contrast the multiplication/division significant figure rule to the sig-nificant figure rule applied for addition/subtraction mathematical operations. 7. Explain how density can be used as a conversion factor to convert the volume of an object to the mass of the object, and vice versa. 8. On which temperature scale CF, °C, or K) does 1 degree represent the smallest change in temperature? 9. Distinguish between physical changes and chemical changes. 10. Why is the separation of mixtures into pure or relatively pure substances so im-portant when performing a chemical analysis?...

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