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.

In a double displacement reaction, what are the products?

One new compound and one element

Which of the following describes the law of conservation of mass?

In a reaction, atoms are not lost or made.

In a reaction, atoms are created or destroyed.

In a reaction, the mass of the product may be more or less than the reactants.

In a reaction, mass never stays the same.

In a single displacement reaction, what are the products?

A new element and a new compound

A new element and a new element

A new compound and a new compound

A new element and a new mixture

In a synthesis reaction, what is the product?

A compound formed by combining two or more reactants

A compound formed by rearranging the atoms of a reactant

A compound formed by breaking down a reactant

What is the process called when we balance a chemical reaction to satisfy the law of conservation of mass?

Ignoring the law of conservation of mass

Unbalancing a chemical equation

In a combustion reaction, what are the products?

sulfur dioxide and nitrogen dioxide

A subscript tells you...

the # atoms of the element it sits behind

the # of atoms in the entire equation

the # of elements in the equation

A coefficient tells you...

the # of molecules of that substance

the # of atoms in the entire equation

the # of elements in the equation

the # atoms of the element it sits behind

Carfo Review: Unit 5 Chemical Reactions

Authored by Charles Martinez

Science

9th - 12th Grade

NGSS covered

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55 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following models best demonstrates a balanced chemical equation?

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The reactants are on the left side of the chemical equation.

True

False

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

How many atoms in all are in a molecule of serotonin?
C₁₀H₁₂N₂O

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

The shape of the coal changes

Oxygen is present

A new substance is produced

Coal is made up of more than one element

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following equations demonstrates an actual chemical reaction that forms a new substance? (HINT: it must follow the Law of Conservation of Mass)

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the left part of a chemical equation called?
H_{2 +}O → H₂O

Reactants

Products

Yields

Chemical Equation

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Is this balanced?
2HgO → 2Hg + O₂

Yes

Tags

NGSS.MS-PS1-5

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Carfo Review: Unit 5 Chemical Reactions

Which of the following models best demonstrates a balanced chemical equation?

The reactants are on the left side of the chemical equation.

How many atoms in all are in a molecule of serotonin?
C₁₀H₁₂N₂O

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

Which of the following equations demonstrates an actual chemical reaction that forms a new substance? (HINT: it must follow the Law of Conservation of Mass)

What is the left part of a chemical equation called?
H_{2 +}O → H₂O

Is this balanced?
2HgO → 2Hg + O₂

Is this balanced?
Al + O₂ → 2Al₂O₃

Exothermic reactions...

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

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Carfo Review: Unit 5 Chemical Reactions

Which of the following models best demonstrates a balanced chemical equation?

The reactants are on the left side of the chemical equation.

How many atoms in all are in a molecule of serotonin?C10H12N2O

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

Which of the following equations demonstrates an actual chemical reaction that forms a new substance? (HINT: it must follow the Law of Conservation of Mass)

What is the left part of a chemical equation called?H2 + O → H2O

Is this balanced?2HgO → 2Hg + O2

Is this balanced?Al + O2 → 2Al2O3

Exothermic reactions...

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

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How many atoms in all are in a molecule of serotonin?
C₁₀H₁₂N₂O

What is the left part of a chemical equation called?
H_{2 +}O → H₂O

Is this balanced?
2HgO → 2Hg + O₂

Is this balanced?
Al + O₂ → 2Al₂O₃

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