Which of the following shows the correct way to balance the chemical equation? Fe + O 2 -> Fe 2 O 3

None of the options are correctly balanced.

Which of the following reactions is balanced?

None of the chemical equations are balanced.

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.

In a closed system, a chemical reaction takes place. The mass of the reactants in the beginning of the reaction is 25g. What does the mass have to be in the end of the reaction in order to follow the law of conservation of mass?

You can't tell with the given information.

There are two reactants in a chemical equation, and one product. The mass of the product is 30g. The mass of the first reactant is 17g. What must the mass of the second reactant be, if the equation is to follow the law of conservation of mass?

You cant tell with the given information

Students react baking soda & vinegar. Which of the following would provide the evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?

The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.

Bubbles were produced during the reaction, which meant that a gas was being produced.

The plastic bag did not change in any way, indicating that it was not involved in the reaction.

The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.

A chemical reaction is balanced when

Both sides have the same number of atoms

both sides have the same elements

Balancing Chemical Equations

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Balancing Chemical Equations

Quiz

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Chemistry

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8th - 9th Grade

•

Practice Problem

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Easy

•

NGSS

MS-PS1-5, MS-PS1-2, MS-PS1-1

Standards-aligned

Hannah Vorpahl

Used 45+ times

FREE Resource

40 questions

Show all answers

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What type of reaction occurs between an element and a compound?
Zn + 2HCl --> ZnCl₂ + H₂

Synthesis

Decomposition

Single Replacement

Double Replacement

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What kind of reaction is this:
2H₂ + O₂ --> 2H₂O

Synthesis

Decomposition

Single Replacement

Double Replacement

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What kind of reaction is this:
4Fe + 3O₂ → 2Fe₂O₃

Synthesis

Decomposition

Single Replacement

Double Replacement

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What kind of reaction is this:
2H₂O₂ →2 H₂O + O₂

Synthesis

Decomposition

Single Replacement

Combustion

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The reaction below is an example of?
AgNO₃ + NaCl → AgCl + NaNO₃

Single Replacement

Double Replacement

Decomposition

Combustion

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What kind of reaction is this:
CaCO₃ + Ag₂SO₄ → CaSO₄+ Ag₂CO₃

Decomposition

Single Replacement

Double Replacement

Combustion

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What type of reaction is illustrated below?
2HI --> H₂+ I₂

synthesis

decomposition

single replacement

double replacement

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Balancing Chemical Equations

40 questions

What type of reaction occurs between an element and a compound?
Zn + 2HCl --> ZnCl₂ + H₂

What kind of reaction is this:
2H₂ + O₂ --> 2H₂O

What kind of reaction is this:
4Fe + 3O₂ → 2Fe₂O₃

What kind of reaction is this:
2H₂O₂ →2 H₂O + O₂

The reaction below is an example of?
AgNO₃ + NaCl → AgCl + NaNO₃

What kind of reaction is this:
CaCO₃ + Ag₂SO₄ → CaSO₄+ Ag₂CO₃

What type of reaction is illustrated below?
2HI --> H₂+ I₂

Which type of reaction involves one element and one compound reacting?

Classify
HI → H₂ + I₂

Classify
Zn + H₂S → ZnS + H₂

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Balancing Chemical Equations

40 questions

What type of reaction occurs between an element and a compound?Zn + 2HCl --> ZnCl2 + H2

What kind of reaction is this:2H2 + O2 --> 2H2O

What kind of reaction is this:4Fe + 3O2 → 2Fe2O3

What kind of reaction is this:2H2O2 →2 H2O + O2

The reaction below is an example of?AgNO3 + NaCl → AgCl + NaNO3

What kind of reaction is this: CaCO3 + Ag2SO4 → CaSO4 + Ag2CO3

What type of reaction is illustrated below?2HI --> H2 + I2

Which type of reaction involves one element and one compound reacting?

ClassifyHI → H2 + I2

ClassifyZn + H2S → ZnS + H2

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What type of reaction occurs between an element and a compound?
Zn + 2HCl --> ZnCl₂ + H₂

What kind of reaction is this:
2H₂ + O₂ --> 2H₂O

What kind of reaction is this:
4Fe + 3O₂ → 2Fe₂O₃

What kind of reaction is this:
2H₂O₂ →2 H₂O + O₂

The reaction below is an example of?
AgNO₃ + NaCl → AgCl + NaNO₃

What kind of reaction is this:
CaCO₃ + Ag₂SO₄ → CaSO₄+ Ag₂CO₃

What type of reaction is illustrated below?
2HI --> H₂+ I₂

Classify
HI → H₂ + I₂

Classify
Zn + H₂S → ZnS + H₂