Question 1

Which of the following best describes the substance shown in image (a) of the first image (granite)?

Accepted Answer

A heterogeneous mixture

Question 2

Refer to the classification diagram (second image). Which sample is a compound?

Accepted Answer

Pure water

Question 3

Which of the following is an example of a physical change, as illustrated in the images?

Accepted Answer

Sublimation of dry ice

Question 4

A student measures the mass of a coin as shown in the image (digital scale reads 5.01 g). How many significant figures should be reported?

Accepted Answer

3

Question 5

Which metric prefix corresponds to $$10^{-6}$$?

Accepted Answer

micro

Question 6

Convert 2.44 meters to centimeters.

Accepted Answer

$$2.44 	imes 10^2$ cm

Question 7

A sample of water is heated from ice to vapor, as shown in the third image. Which property of water changes during this process?

Accepted Answer

Physical state

Question 8

A solution is prepared by dissolving sugar in water (see image). What type of change is this?

Accepted Answer

Physical change

Question 9

Which of the following is an intensive property?

Accepted Answer

Density

Question 10

A chemist finds that 25.00 cm$$^3 of a $$liquid has a mass of 19.625 g at 20°C. Using the table of densities, what is the most likely identity of the liquid?

Accepted Answer

Isopropyl alcohol

Question 11

A student adds 12.5 + 3.269 - 5.12. According to significant figure rules, what is the correct answer?

Accepted Answer

$$10.6$$

Question 12

Which of the following is the correct scientific notation for 0.00051274?

Accepted Answer

$$5.1274 	imes 10$$^{-4}$$

Question 13

A 747 is fueled with 173,231 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

$$133,060 kg$$

Question 14

Which of the following best describes the change when propane gas burns (see image)?

Accepted Answer

Chemical change

Question 15

If a solution contains 30.00% potassium iodide salt by mass, how many grams of potassium iodide are in 40.0 g of solution?

Accepted Answer

$$12.0 g$$

Question 16

Which of the following is the correct conversion factor to convert from in$$^2 to cm$^2$$?

Accepted Answer

$$1 \ \mathrm{in}^2 = 6.45 \ \mathrm{cm}^2$$

Question 17

A student records a mass of 0.050080 g. How many significant figures does this measurement have?

Accepted Answer

6

Question 18

Which of the following best describes the accuracy and precision of Student B in the bar graph image?

Accepted Answer

Precise but not accurate

Question 19

A bug runs 36.0 inches in 1.32 seconds. How long would it take the bug to run 1.00 mile at this rate? (1 mile = 5280 ft, 1 ft = 12 in)

Accepted Answer

$$2,640 s$$

Question 20

Liquid nitrogen boils at 77 K. What is this temperature in degrees Fahrenheit? Use $$T(^{\circ}F$$) = \frac{9}{5}$$T(^{\circ}C) + 32$ and T$$(^{\circ}$$C) = T(K) - 273.15.$$

Accepted Answer

$$-321^{\circ}F$

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

Guida di studio - Domande di pratica

Study guide - Flashcard