AKS 3 Unit Review

AKS 3 Unit Review

By Marissa Brown

Multiple Choice

The Law of Conservation of Mass states Matter is NEITHER created nor destroyed.

• True

• False

TRUE!

The Law states matter is neither created nor destroyed as seen in this image. We started with 100g and when we broke apart the elements they STILL equal 100g of mass.

Multiple Choice

The number in front of a compound or element is a 

• Subscript
• Coefficient
• Superscript
• Charge

Multiple Choice

The Coefficient (3) in the Chemical Formula, 3H₂O, tells you how many _____________ there are.

• Atoms of Hydrogen

• Atoms of Oxygen

• Atoms of Water

• Molecules of Water

Multiple Choice

The number to the lower side of an element is a 

• Subscript
• Superscript
• Coefficient
• Charge

Multiple Choice

How many oxygen atoms are in this chemical formula?

• 6 oxygen atoms

• 2 oxygen atoms

• 3 oxygen atoms

• 4 oxygen atoms

Multiple Choice

If a reaction starts with a total 75g of reactants it should produce 

• a total of 40g of products
• a total of 75g of products
• a total of 180 g of products
• None of the above

Multiple Choice

24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride

• 62 
• 38
• 24
• 14

Multiple Choice

32 g of Oxygen completely reacts with 8 g of Hydrogen to produce _____ g Water

• 8

• 12

• 24

• 40

Multiple Choice

How many elements does PbNO₃ have?

• 2
• 3
• 4
• 5

Multiple Choice

How many nitrogen atoms does NH₃ have?

• 1
• 2
• 3
• 4

Multiple Choice

Is this equation balanced or unbalanced? 
H₂ + O₂ --> H₂O

• balanced
• unbalanced

Multiple Choice

Is this balanced?
2HgO → 2Hg + O₂

• Yes
• No

Multiple Choice

Which equation best represents the law of conservation of mass? 

• A
• B
• C
• D

Multiple Choice

What reaction has the following general formula:

A + CD --> C + AD

• Combination/synthesis

• Decomposition

• Single Replacement

• Double Replacement

Multiple Choice

Which of the Following Correctly Balances this Equation? 
_H₂+_Cl₂ --> _HCl

• 2H₂ + Cl₂ --> 4HCl
• H₂+Cl₂ --> 2HCl
• 3H₂ + 3Cl₂ --> HCl
• H + Cl --> HCl

Multiple Choice

Identify the following chemical reaction.

2 NaBr + 1 Ca(OH)₂ ----> 1 CaBr₂ + 2 NaOH

• Synthesis (or combination)

• Decomposition

• Single replacement

• Double replacement

Multiple Choice

Identify the following chemical reaction.

Pb + FeSO₄ ----> PbSO₄ + Fe

• Synthesis (or combination)

• Decomposition

• Single replacement

• Double replacement

Multiple Choice

What reaction has the following general formula:

A + B --> AB

• Combination/sytthesis

• Decomposition

• Single Replacement

• Double Replacement

Multiple Choice

What reaction has the following general formula:

A + CD --> C + AD

• Combination/synthesis

• Decomposition

• Single Replacement

• Double Replacement

Multiple Choice

What reaction has the following general formula:

AB --> A + B

• Combination/synthesis

• Decomposition

• Single Replacement

• Double Replacement

Multiple Choice

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1
• 2
• 3
• 4

Multiple Choice

Which problem is balanced?
(Check ALL answers)

• PbO₂ + 2H₂
• SO₂ + H₂0 --> H₂SO₄
• 2Na + 2H₂O --> 2NaOH + H₂

Multiple Choice

Balance this equation

_Al +_HCl --> _H₂ +_AlCl₃

• 2,6,3,2

• it's already balanced

• 4,12,3,4

• 2,1,4,5

Multiple Choice

Balance the following equation:

___ H₂+ ___ O₂→___ H₂O

• 1, 1, 3

• 2, 2, 2

• 1, 2, 1

• 2,1, 2