Quiz about (Q2) Unit 3 - Conservation of Mass

Question 1

Which statement is true of the following chemical reaction?

Accepted Answer

The mass of the reactants is equal to the mass of the products.

Answer

The mass of the reactants is less than the mass of the products.

Answer

The mass of the reactants is greater than the mass of the products.

Question 2

Which statement is true of the following chemical reaction?

Accepted Answer

The mass of the reactants is greater than the mass of the products.

Answer

The mass of the reactants is less than the mass of the products.

Answer

The mass of the reactants is equal to the mass of the products.

Question 3

Which statement is true of the following chemical reaction?

Accepted Answer

The mass of the reactants is less than the mass of the products.

Answer

The mass of the reactants is greater than the mass of the products.

Answer

The mass of the reactants is equal to the mass of the products.

Question 4

Which equation shows that the atoms are conserved in the chemical reaction?

Accepted Answer

2K + 3O₂ --> 2KO₃

Answer

K + 3O₂ --> 2KO₃

Answer

3K + 3O₂ --> 6KO₃

Answer

4K + 2O₂ --> 2KO₃

Question 5

Which of the following is true about this chemical reaction?

N₂ + 2H₂ --> NH₄

Accepted Answer

There are more atoms in the reactants

Answer

The equation is balanced.

Answer

There are more atoms in the products

Question 6

Which of the following is true about this chemical reaction?

N₂ + 2H₂ --> 2NH₄

Accepted Answer

There are more atoms in the products

Answer

The equation is balanced.

Answer

There are more atoms in the reactants

Question 7

Which of the following is true about this chemical reaction?

N₂ + 4H₂ --> 2NH₄

Accepted Answer

The equation is balanced.

Answer

There are more atoms in the reactants

Answer

There are more atoms in the products

Question 8

Which formula represents the molecules?

Accepted Answer

4CO2

Answer

C4O8

Answer

4C4O8

Answer

CO2

Question 9

Which formula represents the molecules?

Accepted Answer

2CH4

Answer

CH4

Answer

C2H8

Answer

10CH4

Question 10

Are the atoms conserved in the following chemical reaction?

Accepted Answer

Yes because the number of reactant atoms are equal to the product atoms.

Answer

Yes because there are 3 molecules on both sides.

Answer

No because the reactants have more atoms than the products.

Answer

No because the molecules are different on the product side.

Question 11

Are the atoms conserved in the following chemical reaction?

Accepted Answer

No because the reactants have more atoms than the products.

Answer

Yes because the number of reactant atoms are equal to the product atoms.

Answer

Yes because there are 3 molecules on both sides.

Answer

No because the products have more atoms than the reactants.

Question 12

According to the law of conservation of mass, how much zinc should have been produced?

Accepted Answer

104 grams

Answer

256 grams

Answer

128 grams

Answer

64 grams

Question 13

According to the law of conservation of mass, how much zinc should have been produced?

Accepted Answer

152 grams

Answer

104 grams

Answer

128 grams

Answer

64 grams

Question 14

What changes during a chemical reaction?

Accepted Answer

the properties of the new substance

Answer

total mass

Answer

the number of atoms

Answer

the size of the atoms

Question 15

What are the coefficients required to balance the following chemical equation?

Accepted Answer

6, 1, 2

Answer

3, 1, 2

Answer

3, 2, 1

Answer

6, 2, 3

Question 16

Which statement best describes what happens during. a chemical reaction when two different substances form a new substance?

Accepted Answer

None of the atoms are destroyed and no new atoms form.

Answer

Some of the atoms are destroyed and replaced by new atoms.

Answer

All of the atoms are destroyed and all new atoms form.

Answer

None of the atoms are destroyed but some new atom are added.

Question 17

Two liquids are mixed in a chemical reaction forming a white solid. What will the mass of the new solid substance be?

Accepted Answer

250 g

Answer

150 g

Answer

100 g

Answer

50 g

Question 18

What are these signs of?

Accepted Answer

a chemical reaction occurred

Answer

a physical reaction occurred

Answer

an exothermic reaction occurred

Answer

an endothermic reaction occurred

Question 19

Which sign of a chemical reaction shows the formation of a precipitate?

Accepted Answer

Example D

Answer

Example A

Answer

Example B

Answer

Example C

Answer

Example E

Question 20

Which sign of a chemical reaction shows the formation of a gas?

Accepted Answer

Example C

Answer

Example A

Answer

Example B

Answer

Example D

Answer

Example E

Question 21

The tangram activity is a good analogy for...

Accepted Answer

conservation of mass

Answer

physical properties

Answer

chemical properties

Answer

balancing equations

Question 22

Which equation represents the model below?

Accepted Answer

2SO₂ + O₂ --> 2SO₃

Answer

N₂ + H₂ --> NH₃

Answer

2S₂O + S₂ --> S₃O

Answer

2H₂O + O₂ --> 2H₃O

Question 23

What is this image showing?

Accepted Answer

atoms form new bonds during a chemical reaction

Answer

atoms release large amounts of energy during a chemical reaction

Answer

atoms are too strong to break apart during collisions

Answer

some atoms get destroyed when they collide with enough energy

Question 24

Several students made a claim about what happened when the coal was burned. Which claim is support with evidence form the image below?

Accepted Answer

All of the particles in the solid piece of coal have rearranged into a colorless gas.

Answer

The solid coal particles get burned up and destroyed when coal is burned.

Answer

The gas particles created have less mass than the solid coal particles.

Answer

The solid coal is converted into pure energy when burned.

(Q2) Unit 3 - Conservation of Mass

24 questions

Which statement is true of the following chemical reaction?

Which statement is true of the following chemical reaction?

Which statement is true of the following chemical reaction?

Which equation shows that the atoms are conserved in the chemical reaction?

Which of the following is true about this chemical reaction?

N₂ + 2H₂ --> NH₄

Which of the following is true about this chemical reaction?

N₂ + 2H₂ --> 2NH₄

Which of the following is true about this chemical reaction?

N₂ + 4H₂ --> 2NH₄

Which formula represents the molecules?

Which formula represents the molecules?

Are the atoms conserved in the following chemical reaction?

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(Q2) Unit 3 - Conservation of Mass

24 questions

Which statement is true of the following chemical reaction?

Which statement is true of the following chemical reaction?

Which statement is true of the following chemical reaction?

Which equation shows that the atoms are conserved in the chemical reaction?

Which of the following is true about this chemical reaction?N2 + 2H2 --> NH4

Which of the following is true about this chemical reaction?N2 + 2H2 --> 2NH4

Which of the following is true about this chemical reaction?N2 + 4H2 --> 2NH4

Which formula represents the molecules?

Which formula represents the molecules?

Are the atoms conserved in the following chemical reaction?

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Similar Resources on Wayground

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Which of the following is true about this chemical reaction?

N₂ + 2H₂ --> NH₄

Which of the following is true about this chemical reaction?

N₂ + 2H₂ --> 2NH₄

Which of the following is true about this chemical reaction?

N₂ + 4H₂ --> 2NH₄