Q: A 747 is fueled with $$173,231\ \mathrm{L} of $$jet fuel with a density of $$0.768\ \mathrm{g/cm}^3. $$What is the mass of the fuel in kilograms?

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

Question 1

Which of the following best describes the difference between a scientific law and a scientific theory?

Accepted Answer

A law is a brief statement that summarizes past observations and predicts future ones, while a theory provides the underlying reasons for those observations.

Question 2

A sample of matter is found to have a fixed volume but no fixed shape. Which state of matter does this sample most likely represent?

Accepted Answer

Liquid

Question 3

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

Accepted Answer

Flammability

Question 4

A student heats a sample of copper from room temperature to $$95\ ^\circ \mathrm{C}. $$What happens to the sample?

Accepted Answer

The sample expands.

Question 5

Which separation technique would be most appropriate to separate a mixture of sand and water?

Accepted Answer

Filtration

Question 6

A platinum ring has a mass of $$3.15\ \mathrm{g}$$ and displaces $$0.233\ \mathrm{cm}^3 of $$water. What is its density, and is it likely to be made of platinum ($$21.4\ \mathrm{g/cm}^3$$)?

Accepted Answer

$$13.5\ \mathrm{g/cm}^3$$, not platinum

Question 7

Which of the following is an intensive property?

Accepted Answer

Density

Question 8

Convert $$40.00\ ^\circ \mathrm{C} to $$Kelvin.

Accepted Answer

$$313.15\ \mathrm{K}$$

Question 9

Which prefix multiplier is most appropriate for reporting a measurement of $$5.57 	imes 10$$^{-6}$$\ \mathrm{m}$$?

Accepted Answer

Micro

Question 10

A cylinder has a mass of $$8.3\ \mathrm{g}$$, a length of $$1.94\ \mathrm{cm}$$, and a radius of $$0.55\ \mathrm{cm}. $$What is its density in $$\mathrm{g/cm}^3$$? (Use $$V = \pi r^2$ l)$$

Accepted Answer

$$4.5\ \mathrm{g/cm}^3$$

Question 11

Which of the following best describes the arrangement of atoms in a crystalline solid?

Accepted Answer

Atoms are arranged in a regular, repeating three-dimensional pattern.

Question 12

Which of the following is a physical change?

Accepted Answer

Evaporation of rubbing alcohol

Question 13

A student measures the mass of a lead block four times and gets values close to each other but far from the true value. The measurements are:

Accepted Answer

Precise but not accurate

Question 14

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

Accepted Answer

$$F = 1.8(C) + 32$$

Question 15

A 747 is fueled with $$173,231\ \mathrm{L} of $$jet fuel with a density of $$0.768\ \mathrm{g/cm}^3. $$What is the mass of the fuel in kilograms?

Accepted Answer

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

Question 16

Which of the following is an example of a homogeneous mixture?

Accepted Answer

Tea with sugar

Question 17

Which of the following is the correct equation for the volume of a sphere?

Accepted Answer

$$V = \frac{4}{3} \pi r^3$

Question 18

Which of the following statements about energy is correct?

Accepted Answer

Kinetic energy is associated with motion.

Question 19

Which of the following is an exact number?

Accepted Answer

The number of centimeters in an inch ($$1\ \mathrm{in} = 2.54\ \mathrm{cm})$$

Question 20

Which of the following is the correct rule for determining the number of significant figures in the result of a multiplication or division calculation?

Accepted Answer

The result should have as many significant figures as the number with the fewest significant figures.

Chapter 1: Matter, Measurement, and Problem Solving – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard