Quiz about Chemistry Regents Review

Question 1

What information does a subscript number tell us?

Accepted Answer

the number of atoms per element

Answer

the number of molecules per formula

Question 2

What information does the coefficient in an equation give us?

Accepted Answer

the number of molecules per formula

Answer

the number of atoms per element

Question 3

Which formula has 6 atoms of Carbon, 12 atoms of Hydrogen, and 6 atoms of Oxygen.

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 4

12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed?

Accepted Answer

28 g

Answer

4g

Answer

30g

Answer

12g

Question 5

The number of atoms of N (nitrogen) in 3N₂O₅is

Accepted Answer

6

Answer

2

Answer

5

Answer

15

Question 6

What is the atomic mass for this element?

Accepted Answer

12.0107

Answer

6

Answer

6.0107

Answer

18.0107

Question 7

What 2 elements make up water?

Accepted Answer

Hydrogen and Oxygen

Answer

Hydrogen and Carbon

Answer

Carbon and Oxygen

Answer

Oxygen and Helium

Question 8

How many molecules are in this formula?

Accepted Answer

1

Answer

2

Answer

3

Answer

6

Question 9

What substance commonly exists in what 3 states of matter?

Accepted Answer

Water

Answer

Oxygen

Answer

Carbon Dioxide

Answer

Rust

Question 10

How many molecules are in the Reactant?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 11

The center of an atom is called

a/an __________.

Accepted Answer

nucleus

Answer

atomic mass

Answer

proton center

Answer

energy shell

Question 12

Which image shows a Bohr model for Carbon.

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 13

What is the primary type of bonding in sodium chloride (NaCl)?

Accepted Answer

Ionic bonding

Answer

Covalent bonding

Answer

Metallic bonding

Answer

Hydrogen bonding

Question 14

Which of the following is a balanced chemical equation for the combustion of methane (CH4)?

Accepted Answer

$$\ce{CH4 + 2O2 -> CO2 + 2H2O}$$

Answer

$$\ce{CH4 + O2 -> CO2 + H2O}$$

Answer

$$\ce{2CH4 + 3O2 -> 2CO2 + 4H2O}$$

Answer

$$\ce{CH4 + 3O2 -> CO2 + 2H2O}$$

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