Look at this chemical equation: _Na 3 PO 4+ _KOH ---> _NaOH + _ K 3 PO 4 Which of the choices is correctly balanced?

1 Na 3 PO 4 +3 KOH ---> 3 NaOH + 1 K 3 PO 4

2 Na 3 PO 4 +2 KOH ---> 3 NaOH + 1 K 3 PO 4

1 Na 3 PO 4 +2 KOH ---> 2 NaOH + 1 K 3 PO 4

3 Na 3 PO 4 +3 KOH ---> 3 NaOH + 1 K 3 PO 4

What is the 'Law of Conservation of Matter'?

It states that during a chemical reaction, atoms rearrange, but, are never destroyed or created

It states that during a chemical reaction atoms get created

It states that during a chemical reaction, atoms get destroyed or changed

It states that during a chemical reaction, materials change phase

Examine the reaction in the picture. This equation is balanced because

There is 1 carbon atom on each side

There are 4 oxygen atoms on each side

There are 4 hydrogens on each side

The total number of atoms on each side is equal

Which equation below matches the description above?

2Na 3 PO 4 + 3CaCl 2 --> Ca 3 (PO 4 ) 2 + 6NaCl

Ca 3 (PO 4 ) 2 + 6NaCl --> 2Na 3 PO 4 + 3CaCl 2

CaPO 4 + NaCl --> NaPO 4 + CaCl

NaPO 4 + CaCl --> CaPO 4 + NaCl

Which of the following equations are correctly balanced?

6CO 2 + 6H 2 O --> C 6 H 12 O 6 + 6O 2

12CO 2 +H 2 O --> C 6 H 12 O 6 + O 2

CO 2 + 9H 2 O --> C 6 H 12 O 6 + O 2

CO 2 + H 2 O --> 3C 6 H 12 O 6 + O 2

Why is Cl 2 + KI → KCl + I 2 not a synthesis reaction?

The reaction has more than one product.

Oxygen is not a reactant in this reaction.

The reaction has more than one reactant.

Oxygen is not a product in this reaction.

What is the balanced chemical equation when Ca reacts with Cu(SO 4 )?

2Ca + 3CuSO 4 --> Ca 2 (SO 4 ) 3 + 3Cu

2Ca + Cu 2 SO 4 --> Ca 2 SO 4 + 2Cu

If an element is diatomic it should have a subscript of___

it shouldn't have a subscript, it should have a coefficent

in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride. what is the correct balanced equation.

BaCl 2 (aq) + K 2 CO 3 (aq) --> BaCO 3 (s) + 2KCl (aq)

Ba 2 Cl (aq) + K CO 3 (aq) --> BaCO 3 (s) + KCl (aq)

BaCl (aq) + K 2 CO 3 (aq) --> BaCO 3 (s) + K 2 Cl (aq)

Ba 2 Cl 2 (aq) + KCO 3 (aq) --> Ba 2 CO 3 (s) + KCl 2 (aq)

What is the purpose of the arrow (-->) in a chemical equation?

To separate reactants from products.

To separate reactants from reactants.

To separate products from products.

This symbol is not used in a chemical equation.

What does this word equation represent: Iron + oxygen → Iron oxide

A chemical reaction between iron and oxygen, where rust (iron oxide) is produced

A physical change in iron (nothing new gets made)

A chemical reaction between iron and rust, where oxygen is produced

A physical change between iron and oxygen that forms a red color

Chemical Reactions Unit Review

Authored by Beth VanOstrand

Chemistry

8th - 10th Grade

NGSS covered

Used 22+ times

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MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Copper chloride (CuCl2) and aluminum react to produce aluminum chloride (AlCl3) and copper. Which of the following is the correctly balanced chemical equation for this reaction?

CuCl₂ + Al → AlCl₃ + Cu

3CuCl₂ + Al→ AlCl₃ + 2Cu

3CuCl₂ + 2Al → 2AlCl₃ + 3Cu

CuCl₂ + 3Al → AlCl₃ + 2Cu

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Give the reactants in the following equation:
CH₄ + 2O₂ → CO₂ + H₂O

CH₄ and CO₂

2O₂ and CO₂

CH₄ and 2O₂

2O₂ and H₂O

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Give the products in the following equation:
CH₄ + 2O₂ → CO₂ + H₂O

CH₄ and CO₂

2O₂ and CO₂

2O₂ and H₂O

CO₂ and H₂O

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Is this equation balanced?
N₂ + 3H₂ → 2NH₃

Yes - it is balanced

No - it is not balanced

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Is this equation balanced?
Mg + O₂ → MgO

Yes - it is balanced

No - it is not balanced

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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

Synthesis (or combination)

Decomposition

Single replacement

Double replacement

Combustion

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

2 NH₃+ 1 H₂SO₄ ----> 1 (NH₄)₂SO₄

Synthesis (or combination)

Decomposition

Single replacement

Double replacement

Combustion

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Chemical Reactions Unit Review

Copper chloride (CuCl2) and aluminum react to produce aluminum chloride (AlCl3) and copper. Which of the following is the correctly balanced chemical equation for this reaction?

Give the reactants in the following equation:
CH₄ + 2O₂ → CO₂ + H₂O

Give the products in the following equation:
CH₄ + 2O₂ → CO₂ + H₂O

Is this equation balanced?
N₂ + 3H₂ → 2NH₃

Is this equation balanced?
Mg + O₂ → MgO

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

2 NH₃+ 1 H₂SO₄ ----> 1 (NH₄)₂SO₄

3 Pb + 2 H₃PO₄ ----> 3 H₂ + 1 Pb₃(PO₄)₂

1 Li₃N + 3 NH₄NO₃ ----> 3 LiNO₃ + 1 (NH₄)₃N

CaCO₃ ----> CaO + CO₂

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Chemical Reactions Unit Review

Copper chloride (CuCl2) and aluminum react to produce aluminum chloride (AlCl3) and copper. Which of the following is the correctly balanced chemical equation for this reaction?

Give the reactants in the following equation:CH4 + 2O2 → CO2 + H2O

Give the products in the following equation:CH4 + 2O2 → CO2 + H2O

Is this equation balanced?N2 + 3H2 → 2NH3

Is this equation balanced?Mg + O2 → MgO

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

2 NH3+ 1 H2SO4 ----> 1 (NH4)2SO4

3 Pb + 2 H3PO4 ----> 3 H2 + 1 Pb3(PO4)2

1 Li3N + 3 NH4NO3 ----> 3 LiNO3 + 1 (NH4)3N

CaCO3 ----> CaO + CO2

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Give the reactants in the following equation:
CH₄ + 2O₂ → CO₂ + H₂O

Give the products in the following equation:
CH₄ + 2O₂ → CO₂ + H₂O

Is this equation balanced?
N₂ + 3H₂ → 2NH₃

Is this equation balanced?
Mg + O₂ → MgO

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

2 NH₃+ 1 H₂SO₄ ----> 1 (NH₄)₂SO₄

3 Pb + 2 H₃PO₄ ----> 3 H₂ + 1 Pb₃(PO₄)₂

1 Li₃N + 3 NH₄NO₃ ----> 3 LiNO₃ + 1 (NH₄)₃N

CaCO₃ ----> CaO + CO₂