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?

Coal is made up of more than one element

The Law of Conservation of Mass states

that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

that matter exists in all states and reacts the same

that matter can only be changed into new substances by introducing a catalyst

that matter exists in the same state throughout any chemical change

What is a coefficient?

The large number in front of a chemical formula.

The small number on the right of the chemical symbol.

The number in between the chemical symbols.

The number behind a chemical formula.

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

the product is half the mass of the reactants

the mass changes depending on the reaction

_Na 3 PO 4+ _KOH ---> _NaOH + _ K 3 PO 4

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

Physical Science, Chemical Reactions, Review

Authored by Marissa Powell

Chemistry

9th - 12th Grade

NGSS covered

Used 14+ times

Physical Science, Chemical Reactions, Review

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MULTIPLE CHOICE QUESTION

5 mins • 1 pt

In a chemical equation, is it true that -

the reactant side and product side can have different numbers of atoms for each element

there can be different elements on the reactant side and the product side

an element or compound must be accompanied by a phase change

the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The formula below represents the most common carbohydrate known as glucose. Which information can be determined from the chemical formula?
C₆H₁₂O₆

The structural arrangement of the atoms in a glucose molecule

The color of a glucose molecule

The size of a glucose molecule

The number of atoms of each element in a glucose molecule

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following equations demonstrates an actual chemical reaction that forms a new substance?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

True

False

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Two clear colorless solutions were combined.
The student observed that the temperature changed from 25 •C to 23 •C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to produce these results?

One of the original compounds came out of solution

The solutions reacted chemically

Some of the water froze into ice crystals

Rapid evaporation of water occurred, leaving a solid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

H₃PO₄

H₂SO₄

HCIO₃

H₂0

Tags

NGSS.MS-PS1-1

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Physical Science, Chemical Reactions, Review

In a chemical equation, is it true that -

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

The formula below represents the most common carbohydrate known as glucose. Which information can be determined from the chemical formula?
C₆H₁₂O₆

Which of the following equations demonstrates an actual chemical reaction that forms a new substance?

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

Two clear colorless solutions were combined.
The student observed that the temperature changed from 25 •C to 23 •C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to produce these results?

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

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?

In a ___________change, a substance changes into a different substance.

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Physical Science, Chemical Reactions, Review

In a chemical equation, is it true that -

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

The formula below represents the most common carbohydrate known as glucose. Which information can be determined from the chemical formula?C6H12O6

Which of the following equations demonstrates an actual chemical reaction that forms a new substance?

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

Two clear colorless solutions were combined. The student observed that the temperature changed from 25 •C to 23 •C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to produce these results?

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

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?

In a ___________change, a substance changes into a different substance.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

The formula below represents the most common carbohydrate known as glucose. Which information can be determined from the chemical formula?
C₆H₁₂O₆

Two clear colorless solutions were combined.
The student observed that the temperature changed from 25 •C to 23 •C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to produce these results?

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