Balancing Equations | 2.3K plays

1.

Multiple Choice

1 min

1 pt

How many elements are in C₆H₁₂O₆?

1

2

3

4

2.

Multiple Choice

1 min

1 pt

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

3

6

12

24

3.

Multiple Choice

1 min

1 pt

How many atoms are there TOTAL in:
H₂SO₄

6

5

7

3

4.

Multiple Choice

30 sec

1 pt

The red numbers in the image below represent ________

subscripts

coefficients

I don't know, and don't want to try

None of the answers are correct

5.

Multiple Choice

30 sec

1 pt

The blue numbers in the image below represent ________

I don't know, and don't want to try

coefficients

subscripts

none of the answers are correct

6.

Multiple Choice

1 min

12 pts

The substances at the beginning of a chemical equation are called the ____

product

yield

chemical symbol

reactants

7.

Multiple Choice

30 sec

1 pt

In the equation, 2Mg + O₂ ---> 2MgO, which are the reactants?

Mg and O

MgO

Mg and MgO

O and MgO

8.

Multiple Choice

1 min

1 pt

How many O's are in Al₂(SO₄)₃

4

12

7

24

9.

Multiple Choice

1 min

1 pt

Number of H in 3(NH₄)₂CrO₄

4

2

8

24

10.

Multiple Choice

1 min

1 pt

What does the Law of Conservation of Mass state?

Matter cannot be gained or lost in a chemical reaction.

Matter can only be lost in a chemical reaction.

Matter can only be gained in a chemical reaction.

Matter can be gained and lost in a chemical reaction.

11.

Multiple Choice

30 sec

1 pt

What is the right part of a chemical equation called...

H_{2 +}O₂ --> H₂O

Reactants

Products

Yields

Chemical Equation

12.

Multiple Choice

30 sec

1 pt

What is the arrow in a chemical equation...

H_{2 +}O₂ --> H₂O

Reactants

Products

Yields

Chemical Equation

13.

Multiple Choice

1 min

1 pt

Balance this equation...
HgO --> 2Hg + O₂

It is balanced

2HgO --> Hg + O₂

2HgO --> 2Hg + O₂

I don't know...Oh well!

14.

Multiple Choice

30 sec

1 pt

Balance this equation...
Sb₂S₃ + O₂ --> Sb + SO₂

It is balanced

Sb₂S₃ + 3O₂ --> 2Sb + 3SO₂

Sb₂S₃ + O₂ --> 2Sb + SO₂

I don't know...Oh well!

15.

Multiple Choice

45 sec

1 pt

Which of the following is an unbalanced equation?

CaCO₃--> CaO + CO₂

PbO₂+ 2H₂-->2Pb + H₂O

2Na+ 2H₂O-->2NaOH + H₂

CS₂+ 2O₂--> CO₂+ 2SO₂

16.

Multiple Choice

1 min

1 pt

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

charge

subscript

random number

coefficient

17.

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.

18.

Multiple Choice

1 min

1 pt

Is this equation balanced?

yes

no

Not enough information

19.

Multiple Choice

1 min

1 pt

A sealed test tube containing 8 grams of iron filings and 5 grams of sulfur is heated until the material in the test tube glows bright red. What is the mass of products?

Mass is less than 13 grams

Mass is equal to 13 grams

Mass is greater than 13 grams

Mass cannot be measured

20.

Multiple Choice

30 sec

1 pt

Balance this equation:

H₂ + Cl₂ ---> HCl

It is balanced.

H₂ + Cl₂ ---> 2HCl

3H₂ + Cl₂ ---> 6HCl

H₂ + 3Cl₂ ---> 6HCl

21.

Multiple Choice

5 mins

1 pt

Which number should go in the blank?
Al(NO₃)₃ + _ NaOH -> Al(OH)₃ + 3 NaNO₃

1

2

3

0

22.

Multiple Choice

5 mins

1 pt

Which number should go in the blank?
Mn + _ HNO₃ → Mn(NO₃)₂ + H₂

1

2

3

0

23.

Multiple Choice

5 mins

1 pt

Balancing this Equation,

____ Fe + ____ Cl₂ → ____ FeCl₃

1, 2 → 2

2, 2 → 2

2, 3 → 2

3, 3 → 2

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