Q: Which of the following is a correct dimensional analysis setup to convert 600 microliters ($$\mu L) to $$milliliters ($$mL$$)?

$$600\ \mu L \times \frac{1\ mL}{1000\ \mu L}$$

Q: Which of the following is the correct formula for density?

$$\text{Density} = \frac{\text{Mass}}{\text{Volume}}$$

Question 1

Which of the following numbers has exactly three significant figures?

Accepted Answer

0.00340

Question 2

A student measures the mass of a sample as 12.345 g and its volume as 6.7 mL. What is the density of the sample, reported with the correct number of significant figures?

Accepted Answer

$$1.8\ g/mL$$

Question 3

Which statement best describes the difference between accuracy and precision?

Accepted Answer

Accuracy is how close a measurement is to the true value, while precision is how close repeated measurements are to each other.

Question 4

Convert 0.00045 meters to micrometers ($$\mu m).$$

Accepted Answer

$$450\ \mu m$$

Question 5

Which of the following is the correct scientific notation for 0.0000589?

Accepted Answer

$$5.89 	imes 10$$^{-5}$$

Question 6

A temperature of 25°C is equivalent to how many Kelvin?

Accepted Answer

$$298.15\ K$$

Question 7

Which metric prefix corresponds to $$10^{-9}$$?

Accepted Answer

nano

Question 8

When adding 12.34 and 0.567, what is the correct answer with the proper number of decimal places?

Accepted Answer

$$12.91$$

Question 9

A cube has a mass of 3.5176 g and each side measures 2.00 cm. What is the density of the cube, reported with the correct number of significant figures?

Accepted Answer

$$0.440\ g/cm^3$

Question 10

Which of the following conversion factors would you use to convert microliters ($$\mu L) to $$milliliters ($$mL$$)?

Accepted Answer

$$\frac{1\ mL}{1000\ \mu L}$$

Question 11

Which of the following numbers has five significant figures?

Accepted Answer

0.004560

Question 12

A student records the following measurements for the volume of a liquid: 98 mL, 96 mL, 100 mL, 99 mL. The true volume is 98 mL. Which statement is correct?

Accepted Answer

The measurements are both accurate and precise.

Question 13

Which of the following is NOT a base unit in the metric system?

Accepted Answer

Gram

Question 14

What is the result of $$13.3806 	imes 0.002$$ reported with the correct number of significant figures?

Accepted Answer

$$0.027$$

Question 15

Which of the following is a correct dimensional analysis setup to convert 600 microliters ($$\mu L) to $$milliliters ($$mL$$)?

Accepted Answer

$$600\ \mu L 	imes \frac{1\ mL}{1000\ \mu L}$$

Question 16

Which of the following statements about zeros is correct according to significant figure rules?

Accepted Answer

Zeros between nonzero digits are significant.

Question 17

Which of the following is the correct formula for converting Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 18

Which of the following is the correct scientific notation for 60,000 meters?

Accepted Answer

$$6 	imes 10$$^{4}$$\ m$$

Question 19

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = \frac{	ext{Mass}}{	ext{Volume}}$$

Measurement, Significant Figures, Metric System, and Dimensional Analysis in General Chemistry

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