What is shown by this balanced chemical equation? Select all that apply. H 2 + Cl 2 → 2HCl

The atoms in the original substances regroup and form a different substance.

The same atoms are present before and after the reaction.

The product is a new substance made up of different atoms than the reactants.

The total number of atoms changes in the reaction.

What information about a molecule can you determine from its chemical formula? Select all that apply.

the number of elements in the molecule

the number of atoms of each element

the type of elements in the molecule

the way the atoms connect to each other

How does a correctly balanced chemical equation show that a chemical reaction obeys the law of conservation of matter?

The equation shows that the reactants and the products have the same atoms.

The equation shows that the reactants and products are different substances.

The equation shows that atoms of the products cannot be seen.

The equation shows that the atoms of the reactants are grouped into molecules.

What does modeling the rearrangement of atoms in a balanced chemical equation demonstrate?

New atoms are created in the product

Atoms in the reactant are destroyed

Atoms are not rearranged in a chemical reaction

What is a chemical formula?

A combination of chemical symbols and numbers that represents a single unit of a substance

a specific group of atoms held together by chemical bonds

a number below and to the right of the symbol, shows how many atoms of that element there are.

a number placed in front of a chemical formula to show how many molecules of the substance are represented in the chemical equation.

What is a chemical equation?

Uses chemical formulas to model what happens in a chemical reaction.

A combination of chemical symbols and numbers that represents a single unit of a substance

A specific group of atoms held together by chemical bonds.

The process in which atoms are rearranged to produce different substances

What is a physical property?

Properties of a substance that can be observed or measured without changing the identity of the substance

Anything that has mass and takes up space

the process in which the building blocks of matter are rearranged to produce different substances.

Property that is determined by observing whether or not a substance can change into another substance.

Anything that has mass and takes up space

Properties of a substance that can be observed or measured without changing the identity of the substance

the process in which the building blocks of matter are rearranged to produce different substances.

Property that is determined by observing whether or not a substance can change into another substance.

What is a chemical reaction?

the process in which the building blocks of matter are rearranged to produce different substances.

Properties of a substance that can be observed or measured without changing the identity of the substance

Anything that has mass and takes up space

Property that is determined by observing whether or not a substance can change into another substance.

What is a chemical property?

Property that is determined by observing whether or not a substance can change into another substance.

Properties of a substance that can be observed or measured without changing the identity of the substance

Anything that has mass and takes up space

the process in which the building blocks of matter are rearranged to produce different substances.

Which of the following statements are true about the reaction rates of cooked eggs? Choose all that apply.

Increasing the temperature causes the eggs’ particles to have more energy and move faster.

Increasing the temperature causes the reaction to occur more quickly.

Increasing the temperature causes the reaction to occur more slowly.

Increasing the temperature causes the eggs’ particles to lose energy and move more slowly.

What would likely happen if you were to touch the beaker in which a reaction was absorbing energy?

The beaker would probably feel cooler than before the reaction started.

The beaker would probably feel warmer than before the reaction started.

The beaker would feel the same as before the reaction started.

When energy is changed from one form to another, ____.

all of the energy can be accounted for

some of the energy is lost entirely

HMH Module J Unit 3 Science Test

Authored by Charles Martinez

Science

6th - 8th Grade

NGSS covered

Used 4+ times

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33 questions

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In the chemical equation 3C₂H₄, how many atoms of carbon are represented?

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which types of changes observe the law of conservation of mass?

A. only changes of state

B. only physical changes

C. only chemical changes

D. physical changes and chemical changes

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Ethane, C₂H₆, is one of many compounds that burns in oxygen to form carbon dioxide and water.
C₂H₆ + O₂→ CO₂ + H₂O
What is true of the chemical equation shown?

A. The positions of the reactants and the products are reversed.

B. The formulas of the reactants and the products are not correct.

C. The equation is not balanced, so it does not show conservation of mass.

D. The types of atoms present on the reactant side are not the same as those on the product side.

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Glucose, C₆H₁₂O₆, is a kind of sugar molecule. How many atoms are in a molecule of glucose?

A. 6

B. 12

C. 18

D. 24

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The fuel butane, C₄H₁₀, reacts with oxygen, O₂, to form water, H₂O, and carbon dioxide, CO₂. Which of these best describes the carbon atoms involved in this reaction?

A. The number of carbon atoms does not change.

B. Three carbon atoms are formed in the reaction.

C. Three carbon atoms are destroyed in the reaction.

D. The arrangement of carbon atoms does not change.

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The model shows a single unit of a compound containing several elements. Which of these is the chemical formula for the substance?

Al₂SO₄

Al₂(SO₃)₄

Al₂(SO₄)₃

(AlO)₂(SO₄)₃

Tags

NGSS.MS-PS1-1

MULTIPLE SELECT QUESTION

2 mins • 1 pt

Zinc and hydrochloric acid are combined in a test tube. What can you conclude about the chemical reaction taking place? Select all that apply.

The mass of the products is exactly the same as the mass of the reactants.

One new product formed is a gas.

Molecules are changing into different molecules.

Atoms are changing into different atoms.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

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HMH Module J Unit 3 Science Test

In the chemical equation 3C₂H₄, how many atoms of carbon are represented?

Which types of changes observe the law of conservation of mass?

Ethane, C₂H₆, is one of many compounds that burns in oxygen to form carbon dioxide and water.
C₂H₆ + O₂→ CO₂ + H₂O
What is true of the chemical equation shown?

Glucose, C₆H₁₂O₆, is a kind of sugar molecule. How many atoms are in a molecule of glucose?

The fuel butane, C₄H₁₀, reacts with oxygen, O₂, to form water, H₂O, and carbon dioxide, CO₂. Which of these best describes the carbon atoms involved in this reaction?

The model shows a single unit of a compound containing several elements. Which of these is the chemical formula for the substance?

Zinc and hydrochloric acid are combined in a test tube. What can you conclude about the chemical reaction taking place? Select all that apply.

The photo shows the reaction between zinc and hydrochloric acid that forms zinc chloride and hydrogen gas. Which of these is a correctly balanced equation that models the reaction?

What is shown by this balanced chemical equation? Select all that apply.

H₂ + Cl₂ → 2HCl

How many oxygen (O) atoms are involved in this chemical reaction?

2Fe(OH)₃ → Fe₂O₃ + 3H₂O

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HMH Module J Unit 3 Science Test

In the chemical equation 3C₂H₄, how many atoms of carbon are represented?

Which types of changes observe the law of conservation of mass?

Ethane, C2H6, is one of many compounds that burns in oxygen to form carbon dioxide and water.C2H6 + O2 → CO2 + H2OWhat is true of the chemical equation shown?

Glucose, C6H12O6, is a kind of sugar molecule. How many atoms are in a molecule of glucose?

The fuel butane, C4H10, reacts with oxygen, O2, to form water, H2O, and carbon dioxide, CO2. Which of these best describes the carbon atoms involved in this reaction?

The model shows a single unit of a compound containing several elements. Which of these is the chemical formula for the substance?

Zinc and hydrochloric acid are combined in a test tube. What can you conclude about the chemical reaction taking place? Select all that apply.

The photo shows the reaction between zinc and hydrochloric acid that forms zinc chloride and hydrogen gas. Which of these is a correctly balanced equation that models the reaction?

What is shown by this balanced chemical equation? Select all that apply. H2 + Cl2 → 2HCl

How many oxygen (O) atoms are involved in this chemical reaction? 2Fe(OH)3 → Fe2O3 + 3H2O

Access all questions and much more by creating a free account

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Popular Resources on Wayground

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Ethane, C₂H₆, is one of many compounds that burns in oxygen to form carbon dioxide and water.
C₂H₆ + O₂→ CO₂ + H₂O
What is true of the chemical equation shown?

Glucose, C₆H₁₂O₆, is a kind of sugar molecule. How many atoms are in a molecule of glucose?

The fuel butane, C₄H₁₀, reacts with oxygen, O₂, to form water, H₂O, and carbon dioxide, CO₂. Which of these best describes the carbon atoms involved in this reaction?

What is shown by this balanced chemical equation? Select all that apply.

H₂ + Cl₂ → 2HCl

How many oxygen (O) atoms are involved in this chemical reaction?

2Fe(OH)₃ → Fe₂O₃ + 3H₂O