Q: A sample of jet fuel has a density of $$0.768 \ \mathrm{g/cm^3$}. If a $$Boeing 747 is fueled with $$173,231 \ \mathrm{L} of $$jet fuel, what is the mass of the fuel in kilograms? (1 L = 1000 cm$$^3)$$

$$1.33 \times 10^5$ \ \mathrm{kg}$$

Q: Convert $$5.00 \ \mathrm{km} to $$meters using the correct number of significant figures.

$$5.0 \times 10^3$ \ \mathrm{m}$$

Q: A cube has sides of $$2.00 \ \mathrm{cm}. $$What is its volume in $$\mathrm{mm^3$}$$?

$$8.00 \times 10^3$ \ \mathrm{mm^3$}$$

Question 1

Which of the following is an example of an intensive property?

Accepted Answer

Density

Question 2

A sample of jet fuel has a density of $$0.768 \ \mathrm{g/cm^3$}. If a $$Boeing 747 is fueled with $$173,231 \ \mathrm{L} of $$jet fuel, what is the mass of the fuel in kilograms? (1 L = 1000 cm$$^3)$$

Accepted Answer

$$1.33 	imes 10^5$ \ \mathrm{kg}$$

Question 3

Which of the following correctly lists the SI base units for length, mass, and temperature?

Accepted Answer

Meter, kilogram, Kelvin

Question 4

Convert $$5.00 \ \mathrm{km} to $$meters using the correct number of significant figures.

Accepted Answer

$$5.0 	imes 10^3$ \ \mathrm{m}$$

Question 5

Which of the following numbers has 3 significant figures?

Accepted Answer

0.00420

Question 6

A student measures the length of a metal rod three times and records: $$12.51 \ \mathrm{cm}$$, $$12.50 \ \mathrm{cm}$$, $$12.52 \ \mathrm{cm}. $$The true length is $$12.00 \ \mathrm{cm}. $$Which statement best describes the measurements?

Accepted Answer

The measurements are precise but not accurate.

Question 7

Which prefix represents a factor of $$10^{-6}$$?

Accepted Answer

micro

Question 8

A cube has sides of $$2.00 \ \mathrm{cm}. $$What is its volume in $$\mathrm{mm^3$}$$?

Accepted Answer

$$8.00 	imes 10^3$ \ \mathrm{mm^3$}$$

Question 9

Which of the following is the correct conversion factor to change centimeters to meters?

Accepted Answer

$$1 \ \mathrm{cm} = 0.01 \ \mathrm{m}$$

Question 10

A temperature is measured as $$68.0^\circ \mathrm{F}. $$What is this temperature in $$^\circ \mathrm{C}$$? (Use $$^\circ \mathrm{C} = ( ^\circ \mathrm{F} - 32 ) 	imes \frac{5}{9})$$

Accepted Answer

$$20.0^\circ \mathrm{C}$$

Question 11

Which of the following is an exact number?

Accepted Answer

The number of centimeters in a meter

Question 12

When multiplying $$2.51 (3 $$sig figs) by $$0.10 (2 $$sig figs), how many significant figures should the answer have?

Accepted Answer

2

Question 13

A student needs to convert $$5280$$ feet to miles. Which conversion factor should they use?

Accepted Answer

$$1 \ \mathrm{mile} = 5280 \ \mathrm{ft}$$

Question 14

Which of the following best describes the difference between accuracy and precision?

Accepted Answer

Accuracy is how close measurements are to the true value; precision is how close measurements are to each other.

Question 15

A rectangular block has dimensions $$2.00 \ \mathrm{cm} 	imes 3.00 \ \mathrm{cm} 	imes 4.00 \ \mathrm{cm}. $$What is its volume in $$\mathrm{cm^3$}$$ and $$\mathrm{mL}$$?

Accepted Answer

$$24.0 \ \mathrm{cm^3$}$$ and $$24.0 \ \mathrm{mL}$$

Question 16

Which of the following is the correct scientific notation for $$0.00042$$?

Accepted Answer

$$4.2 	imes 10$$^{-4}$$

Question 17

A graduated cylinder is marked every $$0.1 \ \mathrm{mL}. A $$student reads the meniscus at $$4.57 \ \mathrm{mL}. $$What is the uncertainty in this measurement?

Accepted Answer

$$\pm 0.01 \ \mathrm{mL}$$

Question 18

Which of the following is NOT a base SI unit?

Accepted Answer

Liter (L)

Question 19

A block of metal has a mass of $$15.0 \ \mathrm{g}$$ and a volume of $$2.50 \ \mathrm{cm^3$}. $$What is its density?

Accepted Answer

$$6.00 \ \mathrm{g/cm^3$}$$

Measurement, Units, and Significant Figures in General Chemistry

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