Q: Convert $$690\ \mathrm{m}^2 to$$ $$\mathrm{cm}^2.$$

$$6.90 \times 10^6$\ \mathrm{cm}^2$$

Question 1

Which of the following best describes the level at which chemistry studies matter?

Accepted Answer

Atoms and molecules

Question 2

How many significant figures are in the measurement 0.005890 g?

Accepted Answer

4

Question 3

What answer should be reported, with the correct number of significant figures, for the following calculation? $$965.43 	imes 3.911 + 9413.4136$$

Accepted Answer

13189

Question 4

Using the ruler image provided, what is the correct length of the metal bar, reported with the correct number of significant figures?

Accepted Answer

15.0 cm

Question 5

Convert $$690\ \mathrm{m}^2 to$$ $$\mathrm{cm}^2.$$

Accepted Answer

$$6.90 	imes 10^6$\ \mathrm{cm}^2$$

Question 6

A recipe requires 1.66 liters of milk for a soup base. How many quarts are needed? ($$1\ \mathrm{L} = 1.057\ \mathrm{qts})$$

Accepted Answer

1.75 qts

Question 7

Determine the mass of an object that has a volume of $$88.6\ \mathrm{mL}$$ and a density of $$9.77\ \mathrm{g/mL}.$$

Accepted Answer

866 g

Question 8

Which of the following best describes a solid?

Accepted Answer

Not compressible but rigid

Question 9

Which one of the following is a pure substance?

Accepted Answer

Gold

Question 10

Which one of the following is a homogeneous mixture?

Accepted Answer

Pure air

Question 11

Which of the following is a chemical change?

Accepted Answer

Digesting pizza

Question 12

Determine the number of protons, neutrons, and electrons in $$^{25}_{12}X.$$

Accepted Answer

$$p^+ = 12$$, $$n^0 = 13$, e^- = 12$

Question 13

How many protons does $$^{80}\mathrm{Br}$$ have?

Accepted Answer

35

Question 14

Which of the following best demonstrates the Law of Multiple Proportions using the data for cuprous chloride and cupric chloride?

Accepted Answer

The ratio of copper to chlorine in cuprous chloride is $$1.80$$, and in cupric chloride is $$0.892. $$The ratio of these two ratios is approximately $$2:1.$$

Question 15

Which of the following is the correct electron configuration for a neutral aluminum atom (Al, atomic number 13)?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$\ $$3p^1$$

Question 16

A student measures the mass of a sample as 12.340 g and the volume as 4.1 mL. What is the density, reported with the correct number of significant figures?

Accepted Answer

3.01 g/mL

Question 17

Which of the following is a heterogeneous mixture?

Accepted Answer

Blood

Question 18

Which of the following is NOT a physical property?

Accepted Answer

Flammability

Question 19

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

General Chemistry Exam 1 Study Guidance

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