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

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

Question 1

Which of the following statements best explains why chemistry is called the 'central science'?

Accepted Answer

Chemistry provides foundational concepts that connect and support other sciences such as biology, physics, geology, and environmental science.

Question 2

A student measures the mass of a sample as 12.30 g and its volume as 4.5 mL. What is the density of the sample, reported with the correct number of significant figures?

Accepted Answer

$$2.7\ \mathrm{g/mL}$$

Question 3

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

Accepted Answer

Mass

Question 4

A cube of ice at $$0^\circ\mathrm{C}$$ has sides of $$2.0\ \mathrm{cm}. If $$the density of ice is $$0.92\ \mathrm{g/cm^3$}$$, what is the mass of the cube?

Accepted Answer

$$14.7\ \mathrm{g}$$

Question 5

Which of the following best describes a heterogeneous mixture?

Accepted Answer

A mixture with non-uniform composition, such as trail mix.

Question 6

Convert a body temperature of $$39.0^\circ\mathrm{C} to $$degrees Fahrenheit using the correct formula.

Accepted Answer

$$102.2^\circ\mathrm{F}$$

Question 7

Which of the following is NOT a base SI unit?

Accepted Answer

Liter (L)

Question 8

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

Accepted Answer

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

Question 9

Which of the following is a physical change?

Accepted Answer

Melting ice to form liquid water

Question 10

How many significant figures are in the measurement $$0.004080\ \mathrm{g}$$?

Accepted Answer

4

Question 11

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 12

A student needs to convert $$8.00\ \mathrm{m} to $$inches. Given $$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$ and $$1\ \mathrm{m} = 100\ \mathrm{cm}$$, what is the correct answer with the proper number of significant figures?

Accepted Answer

$$203\ \mathrm{in}$$

Question 13

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 14

A sample of gas occupies $$9.850 	imes 10^3$\ \mathrm{cm^3$}$$ and has a mass of $$1.9\ \mathrm{g}. $$What is the density of the gas in $$\mathrm{g/cm^3$}$$, reported with the correct number of significant figures?

Accepted Answer

$$0.0019\ \mathrm{g/cm^3$}$$

Question 15

Which of the following is an example of a quantitative property?

Accepted Answer

Mass

Question 16

Which of the following is the correct scientific notation for the number 0.0000859?

Accepted Answer

$$8.59 	imes 10$$^{-5}$$

Question 17

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements chemically bonded together.

Question 18

A student is asked to add $$102.50$$ and $$0.231. $$What is the correct answer, reported with the proper number of decimal places?

Accepted Answer

$$102.73$$

Question 19

Which of the following is true about the SI unit 'mole'?

Accepted Answer

It is the SI base unit for amount of substance.

Question 20

Which of the following is an intensive property?

Accepted Answer

Density

Topic 1: Matter and Measurement – Foundations of Chemistry

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