Quiz about MP3 Chem Exam Review

Question 1

What is the value of Avogadro's constant?

Accepted Answer

$$6.02 imes 10^{23}$$ mol $$^{-1}$$

Answer

$$3.01 imes 10^{23}$$ mol $$^{-1}$$

Answer

$$6.02 imes 10^{22}$$ mol $$^{-1}$$

Answer

$$12.04 imes 10^{23}$$ mol $$^{-1}$$

Question 2

Which of the following is the correct formula for balancing the chemical equation: $$ ext{Al} + ext{O}_2 ightarrow ext{Al}_2 ext{O}_3$$ ?

Accepted Answer

$$4 ext{Al} + 3 ext{O}_2 ightarrow 2 ext{Al}_2 ext{O}_3$$

Answer

$$2 ext{Al} + 3 ext{O}_2 ightarrow 2 ext{Al}_2 ext{O}_3$$

Answer

$$2 ext{Al} + ext{O}_2 ightarrow ext{Al}_2 ext{O}_3$$

Answer

$$4 ext{Al} + 2 ext{O}_2 ightarrow 2 ext{Al}_2 ext{O}_3$$

Question 3

What is the correct name for the ionic compound $$ ext{NaCl}$$ ?

Accepted Answer

Sodium chloride

Answer

Sodium chlorate

Answer

Sodium(I) chloride

Answer

Sodium chlorite

Question 4

What is the correct name for the covalent compound $$ ext{CO}_2$$ ?

Accepted Answer

Carbon dioxide

Answer

Carbon monoxide

Answer

Carbon(II) oxide

Answer

Carbonic acid

Question 5

How many molecules are in 2 moles of a substance, according to Avogadro's constant?

Accepted Answer

$$12.04 imes 10^{23}$$ molecules

Answer

$$6.02 imes 10^{23}$$ molecules

Answer

$$3.01 imes 10^{23}$$ molecules

Answer

$$24.08 imes 10^{23}$$ molecules

Question 6

Which of the following is the correct formula for balancing the chemical equation: $$ ext{H}_2 + ext{O}_2 ightarrow ext{H}_2 ext{O}$$ ?

Accepted Answer

$$2 ext{H}_2 + ext{O}_2 ightarrow 2 ext{H}_2 ext{O}$$

Answer

$$ ext{H}_2 + 2 ext{O}_2 ightarrow ext{H}_2 ext{O}$$

Answer

$$ ext{H}_2 + ext{O}_2 ightarrow 2 ext{H}_2 ext{O}$$

Answer

$$2 ext{H}_2 + 2 ext{O}_2 ightarrow 2 ext{H}_2 ext{O}$$

Question 7

What is the correct name for the ionic compound $$ ext{MgCl}_2$$ ?

Accepted Answer

Magnesium chloride

Answer

Magnesium(I) chloride

Answer

Magnesium chlorate

Answer

Magnesium dichloride

Question 8

What is the correct name for the covalent compound $$ ext{SF}_6$$ ?

Accepted Answer

Sulfur hexafluoride

Answer

Sulfur fluoride

Answer

Sulfur(VI) fluoride

Answer

Hexafluorosulfuric acid

Question 9

What is the purpose of balancing chemical equations?

Accepted Answer

To ensure that the same number of each type of atom appears on both sides of the equation

Answer

To make the equation look more complex

Answer

To change the properties of the products

Answer

To increase the reaction rate

Question 10

What is the correct formula for the ionic compound formed between sodium (Na) and sulfur (S)?

Accepted Answer

$$ ext{Na}_2 ext{S}$$

Answer

$$ ext{NaS}$$

Answer

$$ ext{NaS}_2$$

Answer

$$ ext{Na}_2 ext{S}_2$$

Question 11

What is the correct name for the covalent compound $$ ext{P}_4 ext{O}_{10}$$ ?

Accepted Answer

Tetraphosphorus decoxide

Answer

Phosphorus oxide

Answer

Phosphorus(IV) oxide

Answer

Phosphorus decioxide

Question 12

What is the correct name for the ionic compound $$ ext{CaCO}_3$$ ?

Accepted Answer

Calcium carbonate

Answer

Calcium(I) carbonate

Answer

Calcium carbide

Answer

Calcium bicarbonate

Question 13

What is the correct name for the covalent compound $$ ext{N}_2 ext{O}_5$$ ?

Accepted Answer

Dinitrogen pentoxide

Answer

Nitrogen pentoxide

Answer

Nitrogen(V) oxide

Answer

Nitrous acid

Question 14

How many atoms are in 0.5 moles of a substance, according to Avogadro's constant?

Accepted Answer

$$3.01 imes 10^{23}$$ atoms

Answer

$$6.02 imes 10^{23}$$ atoms

Answer

$$1.20 imes 10^{24}$$ atoms

Answer

$$3.01 imes 10^{22}$$ atoms

Question 15

Which of the following is the correct formula for balancing the chemical equation: $$ ext{C}_3 ext{H}_8 + ext{O}_2 ightarrow ext{CO}_2 + ext{H}_2 ext{O}$$ ?

Accepted Answer

$$ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}$$

Answer

$$ ext{C}_3 ext{H}_8 + 3 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}$$

Question 16

Which of the following is the correct formula for balancing the chemical equation: $$ ext{N}_2 + ext{H}_2 ightarrow ext{NH}_3$$ ?

Accepted Answer

$$ ext{N}_2 + 3 ext{H}_2 ightarrow 2 ext{NH}_3$$

Answer

$$ ext{N}_2 + 2 ext{H}_2 ightarrow 2 ext{NH}_3$$

Answer

$$2 ext{N}_2 + 3 ext{H}_2 ightarrow ext{NH}_3$$

Answer

$$ ext{N}_2 + 3 ext{H}_2 ightarrow ext{NH}_3$$

Question 17

What is the correct name for the covalent compound $$ ext{Cl}_2 ext{O}_7$$ ?

Accepted Answer

Dichlorine heptoxide

Answer

Chlorine heptoxide

Answer

Chlorine(VII) oxide

Answer

Chlorine oxide

Question 18

How many moles are there in $$1.204 imes 10^{24}$$ atoms of carbon?

Accepted Answer

2 moles

Answer

1 mole

Answer

0.5 moles

Answer

4 moles

Question 19

A sample contains $$3.01 imes 10^{23}$$ molecules of CO $$_2$$ . How many moles of CO $$_2$$ does this represent?

Accepted Answer

0.5 moles

Answer

0.25 moles

Answer

1 mole

Answer

2 moles

Question 20

If you have 4 moles of argon gas, how many atoms of argon do you have?

Accepted Answer

$$2.41 imes 10^{24}$$

Answer

$$24.08 imes 10^{23}$$

Answer

$$6.02 imes 10^{23}$$

Answer

$$1.20 imes 10^{24}$$

Question 21

How many molecules are in 2.5 mol of NaCl?

Accepted Answer

1.51x10²⁴

Answer

1.51x10²³

Answer

146

Answer

4.15

Question 22

How many particles are in a mole?

Accepted Answer

6.02 x 10²³

Answer

602

Answer

602 million

Answer

602 moles

Question 23

How many molecules are there in 5.9 moles of NaCl?

Accepted Answer

3.5x10²⁴molecules

Answer

9.79x10^-24molecules

Answer

1.02x10²³molecules

Question 24

If you have 3 moles of nitrogen gas (N₂), how many molecules of nitrogen do you have?

Accepted Answer

$$18.06 imes 10^{23}$$

Answer

$$1.81 imes 10^{24}$$

Answer

$$6.02 imes 10^{23}$$

Answer

$$1.20 imes 10^{24}$$

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