Chemical Equations | 7.7K plays

1.

Multiple Choice

1 min

1 pt

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

3

6

12

24

2.

Multiple Choice

1 min

1 pt

How many Sodium (Na) are in 6NaCl?

1

12

6

3.

Multiple Choice

1 min

1 pt

How many Aluminum are in Al₂O₃?

3

2

5

4.

Multiple Choice

1 min

1 pt

How many Hydrogen are in 4H₂O?

6

8

2

4

5.

Multiple Choice

1 min

1 pt

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

4Fe + 3O₂ -> 2Fe₂O₃

2 Fe + 3O₂ -> Fe₂O₆

4 Fe + O₆ -> 2Fe₂O₃

None of the options are correctly balanced.

6.

Multiple Choice

2 mins

1 pt

Which of the following reactions is balanced?

2CH₄ + O₂ -> CO₂ + H₂O

CH₄ + 2O₂ -> CO₂ + H₂O

CH₄ + 2O₂ -> CO₂ + 2H₂O

None of the chemical equations are balanced.

7.

Multiple Choice

1 min

1 pt

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

1

2

3

4

8.

Multiple Choice

2 mins

1 pt

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

2,1,2,1

1,2,2,1

1,2,1,2

2,2,2,2

9.

Multiple Choice

2 mins

1 pt

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

1,2,1,1

2,1,2,1

1,2,1,2

0,2,0,2

10.

Multiple Choice

2 mins

1 pt

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

2, 6, 3, 2

it is already balanced

4, 12, 3, 4

2, 1, 4, 5

11.

Multiple Choice

45 sec

1 pt

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

Yields

Reactants

Products

Precipitates

12.

Multiple Choice

1 min

1 pt

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

Products

Coefficients

Precipitates

Reactants

13.

Multiple Choice

1 min

1 pt

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

Matter is not created or destroyed.

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

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

Matter is not changed.

14.

Multiple Choice

45 sec

1 pt

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

All three are reactants and none are products.

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

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

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

15.

Multiple Choice

45 sec

1 pt

Which is the Law of Conservation of Matter?

matter cannot be created or destroyed, it only rearranges

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

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

matter is an unproven theory created by Hans Geiger

16.

Multiple Choice

1 min

1 pt

Which one is a compound?

Co

Br

Fe

CO

17.

Multiple Choice

1 min

1 pt

Which one is an element?

Co

CO

CO₂

CO₃^-2

18.

Multiple Choice

1 min

1 pt

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

1

4

3

5

19.

Multiple Choice

15 mins

1 pt

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

1

2

3

0

20.

Multiple Choice

15 mins

1 pt

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

1

2

3

0

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