Methane (natural gas) is a fossil fuel that can be burned to heat our homes. The reactants in this chemical equation are methane and oxygen. The products are water and carbon dioxide. The following word equation can be used to describe this reaction: Methane + oxygen→ water + carbon dioxide Which of the following is true about the mass of the reactants and the products?

c. the mass of the methane and oxygen will be equal to the mass of the water and carbon dioxide.

a. the mass of the methane and oxygen will be less than the mass of the water and carbon dioxide.

b. the mass of the methane and oxygen will be greater than the mass of the water and carbon dioxide.

d. it is not possible to determine the masses without more information.

The formula below represents the chemical reaction between the elements hydrogen and oxygen when the compound water is formed. 2H 2 + O 2 → 2H 2 O This equation supports the law of conservation of mass because

c. the same number of atoms of the elements hydrogen and oxygen are in the reactants as are in the products.

a. the total number of hydrogen and oxygen atoms in the reactants and products is twelve.

b. the mass of hydrogen in the reactants is equal to the mass of the water in the product

d. atoms of the elements hydrogen and oxygen react to form molecules of the compound water.

A chemical equation is balanced when the

c. Same number of each kind of atom appears in the reactants and in the products

a. Subscripts of the reactants equal the subscripts of the products.

b. Coefficients of the reactants equal the coefficients of the products.

d. Products and reactants are the same chemicals.

A chemical reaction is balanced when

Both sides have the same number of atoms

both sides have the same elements

Chemical Equations & Conservation of Mass

Authored by Erin Williams

Science

6th - 8th Grade

NGSS covered

Used 2+ times

Chemical Equations & Conservation of Mass

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is this equation balanced?

yes

Not enough information

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is this equation balanced?

yes

Not enough information

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Substance that cannot be broken into simpler substances

element

molecule

gram

proton

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Substance made up of chemically combined elements

atom

element

electron

compound

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Substances that form as the result of a chemical reaction

products

reactants

coefficients

subscripts

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Substances present at the start of a chemical reaction

subscripts

coefficients

reactants

products

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is this chemical equation balanced?
2Na + Cl₂ ----> 2NaCl

Yes

Tags

NGSS.MS-PS1-5

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Chemical Equations & Conservation of Mass

Is this equation balanced?

Is this equation balanced?

Substance that cannot be broken into simpler substances

Substance made up of chemically combined elements

Substances that form as the result of a chemical reaction

Substances present at the start of a chemical reaction

Is this chemical equation balanced?
2Na + Cl₂ ----> 2NaCl

The total amount of matter (atoms) before and after a chemical reaction remains the same.

Which are the reactants in the following reaction?
2Mg + O₂ ---> 2MgO

Mg + ___ HCl → MgCl₂ + H₂

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Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Chemical Equations & Conservation of Mass

Is this equation balanced?

Is this equation balanced?

Substance that cannot be broken into simpler substances

Substance made up of chemically combined elements

Substances that form as the result of a chemical reaction

Substances present at the start of a chemical reaction

Is this chemical equation balanced?2Na + Cl2 ----> 2NaCl

The total amount of matter (atoms) before and after a chemical reaction remains the same.

Which are the reactants in the following reaction?2Mg + O2 ---> 2MgO

Mg + ___ HCl → MgCl2 + H2

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Is this chemical equation balanced?
2Na + Cl₂ ----> 2NaCl

Which are the reactants in the following reaction?
2Mg + O₂ ---> 2MgO

Mg + ___ HCl → MgCl₂ + H₂