Q: Which of the following is a correct conversion factor for the equality $$1\,\text{kg} = 1000\,\text{g}$$?

$$\frac{1000\,\text{g}}{1\,\text{kg}}$$

Q: Which of the following is the correct metric equality for converting meters to centimeters?

$$1\,\text{m} = 100\,\text{cm}$$

Q: Which of the following is the correct balanced equation for the combustion of propane ($$C_3H_8$$)?

$$C_3H_8(g) + 5O_2(g) \rightarrow 3CO_2(g) + 4H_2O(g) + \text{energy}$$

Q: Which of the following is a correct conversion factor for the equality $$1\,\text{L} = 1000\,\text{mL}$$?

$$\frac{1000\,\text{mL}}{1\,\text{L}}$$

Q: Which of the following is a correct equality for mass in the metric system?

$$1\,\text{g} = 1000\,\text{mg}$$

Question 1

Which of the following observations is NOT typically evidence of a chemical change?

Accepted Answer

Melting of ice

Question 2

Which of the following is the correct balanced chemical equation for the formation of rust from iron and oxygen?

Accepted Answer

$$4Fe(s) + 3O_2(g) \rightarrow 2Fe_2O_3(s)$$

Question 3

In the reaction $$2HgO(s) \rightarrow 2Hg(l) + O_2$(g)$$, what type of reaction is occurring?

Accepted Answer

Decomposition

Question 4

Which symbol in a chemical equation indicates that heat is required for the reaction to occur?

Accepted Answer

$$\Delta$$

Question 5

What is the correct classification for the reaction $$CH_4(g) + 2O_2(g$$) ightarrow $$CO_2(g) + 2H_2O(g$$) + 	ext{energy}$$?

Accepted Answer

Combustion

Question 6

Which of the following is a correct conversion factor for the equality $$1\,	ext{kg} = 1000\,	ext{g}$$?

Accepted Answer

$$\frac{1000\,	ext{g}}{1\,	ext{kg}}$$

Question 7

A doctor's order prescribes 0.150 mg of Synthroid. If tablets contain 75 mcg of Synthroid, how many tablets are required?

Accepted Answer

2 tablets

Question 8

Which of the following reactions is a double replacement reaction?

Accepted Answer

$$AgNO_3(aq) + $$NaCl(aq) \rightarrow AgCl(s) + $$NaNO_3(aq$$)$$

Question 9

Which of the following is the correct metric equality for converting meters to centimeters?

Accepted Answer

$$1\,	ext{m} = 100\,	ext{cm}$$

Question 10

Which of the following is an example of oxidation in a biological system?

Accepted Answer

Loss of electrons

Question 11

If a person weighs 164 lb, what is their mass in kilograms? (Use $$1\,	ext{kg} = 2.20\,	ext{lb})$$

Accepted Answer

$$74.5\,	ext{kg}$$

Question 12

Which of the following is the correct balanced equation for the combustion of propane ($$C_3H_8$$)?

Accepted Answer

$$C_3H_8(g) + 5O_2(g) ightarrow 3CO_2(g) + 4H_2O(g) + 	ext{energy}$$

Question 13

Which of the following is a correct conversion factor for the equality $$1\,	ext{L} = 1000\,	ext{mL}$$?

Accepted Answer

$$\frac{1000\,	ext{mL}}{1\,	ext{L}}$$

Question 14

Which of the following is the correct classification for the reaction $$2Zn(s) + 2HCl(aq) \rightarrow $$ZnCl_2$$(aq) + H_2$(g)$$?

Accepted Answer

Single replacement

Question 15

Which of the following is the correct definition of reduction?

Accepted Answer

Gain of electrons

Question 16

A rattlesnake is 2.44 m long. How many centimeters long is the snake?

Accepted Answer

$$244\,	ext{cm}$$

Question 17

Which of the following is a correct equality for mass in the metric system?

Accepted Answer

$$1\,	ext{g} = 1000\,	ext{mg}$$

Question 18

Which of the following is the correct classification for the reaction $$2Na(s) + Cl_2$(g) \rightarrow 2NaCl(s)$$?

Accepted Answer

Combination

Question 19

Which of the following is a correct statement about oxidation-reduction reactions?

Accepted Answer

Oxidation is the loss of electrons

Chemical Reactions and Chemical Equations: Principles and Practice

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