Quiz about Chemical Equations

Question 1

How many atoms of carbon (C) are in C₆H₁₂O₆?

Accepted Answer

6

Answer

3

Answer

12

Answer

24

Question 2

How many Sodium (Na) are in 6NaCl?

Accepted Answer

6

Answer

1

Answer

12

Question 3

How many Aluminum are in Al₂O₃?

Accepted Answer

2

Answer

3

Answer

5

Question 4

How many Hydrogen are in 4H₂O?

Accepted Answer

8

Answer

6

Answer

2

Answer

4

Question 5

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

Accepted Answer

4Fe + 3O₂ -> 2Fe₂O₃

Answer

2 Fe + 3O₂ -> Fe₂O₆

Answer

4 Fe + O₆ -> 2Fe₂O₃

Answer

None of the options are correctly balanced.

Question 6

Which of the following reactions is balanced?

Accepted Answer

CH₄ + 2O₂ -> CO₂ + 2H₂O

Answer

2CH₄ + O₂ -> CO₂ + H₂O

Answer

CH₄ + 2O₂ -> CO₂ + H₂O

Answer

None of the chemical equations are balanced.

Question 7

How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl₂ + H₂

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 8

Balance this equation.
_CF₄+ _Br₂-- _CBr₄+ _F₂

Accepted Answer

1,2,1,2

Answer

2,1,2,1

Answer

1,2,2,1

Answer

2,2,2,2

Question 9

Balance this equation.
_CH₄ + _O₂--> _CO₂+ _H₂O

Accepted Answer

1,2,1,2

Answer

1,2,1,1

Answer

2,1,2,1

Answer

0,2,0,2

Question 10

Balance this equation
_Al +_HCl --> _H₂+_AlCl₃

Accepted Answer

2, 6, 3, 2

Answer

it is already balanced

Answer

4, 12, 3, 4

Answer

2, 1, 4, 5

Question 11

The substances listed on the right side of a chemical equation are the

Accepted Answer

Products

Answer

Yields

Answer

Reactants

Answer

Precipitates

Question 12

The substances listed on the left side of a chemical equation are the

Accepted Answer

Reactants

Answer

Products

Answer

Coefficients

Answer

Precipitates

Question 13

In chemical reactions, what does the principle of conservation of mass mean?

Accepted Answer

Matter is not created or destroyed.

Answer

The total mass of the reactants is greater than the total mass of the products.

Answer

The total mass of the reactants is less than the total mass of the products.

Answer

Matter is not changed.

Question 14

Identify the reactant(s) and product(s) of the reaction.

Accepted Answer

Hydrogen and oxygen are the reactants, and water is the product.

Answer

All three are reactants and none are products.

Answer

Hydrogen and water are the reactants, and oxygen is the product.

Answer

Water and oxygen are the reactants, and hydrogen is the product.

Question 15

Which is the Law of Conservation of Matter?

Accepted Answer

matter cannot be created or destroyed, it only rearranges

Answer

matter can be created but it cannot be destroyed, it never rearranges

Answer

matter can be destroyed but it cannot be created, it usually just rearranges

Answer

matter is an unproven theory created by Hans Geiger

Question 16

Which one is a compound?

Accepted Answer

CO

Answer

Co

Answer

Br

Answer

Fe

Question 17

Which one is an element?

Accepted Answer

Co

Answer

CO

Answer

CO2

Answer

CO3-2

Question 18

How many elements are found in the following molecule? Mg(ClO₃)₂

Accepted Answer

3

Answer

1

Answer

4

Answer

5

Question 19

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

Accepted Answer

2

Answer

1

Answer

3

Answer

0

Question 20

Which number should go in the blank?
2 Na+ _ Cl₂ -> 2 NaCl

Accepted Answer

1

Answer

2

Answer

3

Answer

0

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