Quiz about Conservation of Matter

Question 1

The Law of Conservation of matter states that the total amount of matter ______________ after it undergoes change.

Accepted Answer

stays the same

Answer

disappears

Answer

weighs less

Answer

explodes

Question 2

An oreo cookie weighs 20 grams.  It gets crushed into crumbs for a recipe.  How much do its crumbs weigh?

Accepted Answer

20 grams

Answer

15 grams

Answer

25 grams

Question 3

What is the Law of Conservation of mass?

Accepted Answer

Mass is never created or destroyed

Answer

Mass is created in a chemical reaction

Answer

Mass is created in a physical change

Answer

New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

Question 4

Which of the following are Subscripts in this Chemical Formula: 3Fe₂O₄

Accepted Answer

2,4

Answer

3,4

Answer

3,2

Answer

6

Question 5

How many nitrogen atoms does NH₃ have?

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 6

How many oxygen atoms are in this chemical formula?

Accepted Answer

6 oxygen atoms

Answer

2 oxygen atoms

Answer

3 oxygen atoms

Answer

4 oxygen atoms

Question 7

How many Sodium (Na) are in 6NaCl?

Accepted Answer

6

Answer

1

Answer

12

Question 8

Which side of a chemical equation is the reactant side?

Accepted Answer

Left (before the yields sign)

Answer

Right (after the yields sign)

Question 9

Which side of a chemical equation os the product side?

Accepted Answer

Right (after the yields sign)

Answer

Left (before the yields sign)

Question 10

What is a coefficient?

Accepted Answer

The large number to the left of a formula.

Answer

The small number on the right of the chemical symbol.

Question 11

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O

Accepted Answer

Yields

Answer

Reactants

Answer

Products

Answer

Chemical Equation

Question 12

Read the following chemical formula: C₆H₁₂O₆. How many hydrogen atoms are in the formula?

Accepted Answer

12

Answer

6

Answer

4

Question 13

If reaction starts with 20g of reactants, it will produce ---

Accepted Answer

a total of 20g of product

Answer

a total of 40g of product

Answer

a total of 10g of product

Answer

a total of 80 g of product

Question 14

How many of each type of atom are in the formula NH₃?

Accepted Answer

1 nitrogen, 3 hydrogen

Answer

3 nitrogen, 3 hydrogen

Answer

1 neon, 3 hydrogen

Answer

1 nitrogen, 3 helium

Question 15

How many molecules are represented in the formula 3CO₂?

Accepted Answer

3 carbon dioxide

Answer

3 carbon, 2 oxygen

Answer

6 carbon dioxide

Answer

3 carbon, 6 oxygen

Question 16

In a reaction A + B ----> C.

Reactant A has 5g and product C has 9g.

How many grams does reactant B should have?

Accepted Answer

4g

Answer

5g

Answer

9g

Answer

14g

Question 17

What will have more mass when a chemical change is complete: the reactants before the chemical reaction or the product after the reaction is complete?

Accepted Answer

They both will have the same mass

Answer

The product always has more mass than the reactant

Answer

The reactant will have more mass than the product

Answer

They both will lose mass after the reaction

Question 18

If there are 4 H atoms on the reactant side, how many H atoms will be on the product side?

Accepted Answer

4

Answer

2

Answer

6

Answer

You need more information to answer this question

Question 19

How many atoms of aluminum are on each side of the following equation?

4Al + 3O₂--> 2Al₂O₃

Accepted Answer

4

Answer

2

Answer

6

Answer

1

Question 20

Matter is anything that ---

Accepted Answer

takes up space and has mass.

Answer

is in our universe.

Answer

is light, sound or ideas.

Question 21

The amount of atoms should be the same on both sides of a chemical equation.

Accepted Answer

True

Answer

False

Question 22

Chemical Reaction

Accepted Answer

The process by which one or more substances change to produce one or more different substances.

Answer

The energy that is stored in all compounds and potentially released in chemical reactions.

Answer

To maintain at a constant overall total.

Answer

The smallest particle of an element that maintains the chemical identity of that element.

Question 23

To maintain at a constant overall total.

Accepted Answer

Conserve

Answer

Covalent bond

Answer

Chemical reaction

Answer

Atom

Question 24

The smallest particle of an element that maintains the chemical identity of that element.

Accepted Answer

Atom

Answer

Conserve

Answer

Chemical Energy

Answer

Chemical Reaction

Question 25

Matter cannot be created or destroyed describes which of the following?

Accepted Answer

Law of conservation of matter

Answer

Law of attraction

Answer

Law of superposition

Answer

Law of conservation of energy

Question 26

How many of each type of atom are in 4NO₂?

Accepted Answer

4 nitrogen, 8 oxygen

Answer

4 nitrogen, 2 oxygen

Answer

4 nitrogen, 6 oxygen

Answer

8 nobelium

Question 27

The chemical formula of glucose is C₆H₁₂O_6.Is glucose an element, compound, or mixture?

Accepted Answer

compound

Answer

element

Answer

mixture

Question 28

The chemical formula of glucose is C₆H₁₂O_6.Is it a pure substance?

Accepted Answer

yes

Answer

no

Question 29

Which of the following substances is a compound?

Accepted Answer

CO2

Answer

Co

Answer

O2

Answer

Li

Question 30

If the mass of a chemical reaction's product is 15 grams, what would the mass of the reactants be?

Accepted Answer

15 g

Answer

20 g

Answer

10 g

Answer

3 g

Question 31

Which section represents the reactants?

Accepted Answer

A

Answer

B

Answer

C

Question 32

Which section represents the products?

Accepted Answer

C

Answer

A

Answer

B

Question 33

Which section represents the yield sign?

Accepted Answer

B

Answer

A

Answer

C

Question 34

Why does this picture demonstrate the Law of Conservation of Mass?

Accepted Answer

the number of atoms of each element are the same on both sides

Answer

they start out separate and end up combined

Answer

the same elements are used

Answer

it doesn't demonstrate the Law of Conservation of Mass

Question 35

If a chemical reaction occurs in a closed system (no way for any part of the reaction to escape), how does the product mass compare to the reactant mass?

Accepted Answer

the mass would stay the same

Answer

the mass would decrease

Answer

the mass would increase

Answer

it depends on the type of reaction

Question 36

Which picture below would correctly demonstrate the Law of Conservation of Matter if this picture is the reactants?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 37

Which of the following would represent an element?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Question 38

Matter is not created or [BLANK] during a chemical reaction

Accepted Answer

Destroyed

Answer

Balanced

Answer

Mass

Answer

Coefficient

Question 39

The total number of [BLANK] is conserved (stays the same) and the mass does not change.

Accepted Answer

Atoms

Answer

Subscript

Answer

Mass

Answer

Coefficient

Question 40

The total number of atoms is conserved (stays the same) and the [BLANK] does not change.

Accepted Answer

Mass

Answer

Subscript

Answer

Atoms

Answer

Coefficient

Question 41

This is used to represent the number of each atom being represented.

Accepted Answer

The Subscript

Answer

A Exponent

Answer

The Coefficient

Answer

A Molecule

Question 42

How many hydrogen atoms are in this chemical formula:

Accepted Answer

4 hydrogen atoms

Answer

1 hydrogen atom

Answer

2 hydrogen atoms

Answer

3 hydrogen atoms

Question 43

How many oxygen atoms are in this chemical formula?

Accepted Answer

6 oxygen atoms

Answer

2 oxygen atoms

Answer

3 oxygen atoms

Answer

4 oxygen atoms

Question 44

True or false.  Law of conservation of mass means that the number of atoms of the products is more than the number of atoms in the reactants.

Accepted Answer

False

Answer

True

Question 45

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

Accepted Answer

True

Answer

False

Question 46

What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?

Accepted Answer

They both will weigh the same

Answer

The product always weighs more than the reactant

Answer

The reactant will weigh more than the product

Answer

They both will loose mass after the reaction

Question 47

How many Carbons are on EACH side of the chemical reaction?

Accepted Answer

1

Answer

3

Answer

4

Answer

5

Question 48

There are 4 hydrogens in the products of the equation. How many hydrogens would you expect in the reactants?

Accepted Answer

4

Answer

1

Answer

3

Answer

5

Question 49

Looking at the reactants, there is _____ molecule(s) of CH₄and _______ molecule(s) of O₂.

Accepted Answer

1, 2

Answer

1, 1

Answer

2, 2

Answer

2, 4

Question 50

The following chemical reaction occurs:
2S + 3O₂ -> 2SO₃_{How many atoms of oxygen are there in the reactant?}

Accepted Answer

6 atoms of oxygen

Answer

2 atoms of oxygen

Answer

3 atoms of oxygen

Answer

1 atom of oxygen

Question 51

The following chemical reaction occurs:
N₂+ 3 H_{2 ->}2NH₃How many atoms of hydrogen are there in the product?

Accepted Answer

6 atoms of hydrogen

Answer

3 atoms of hydrogen

Answer

2 atoms of hydrogen

Answer

1 atom of hydrogen

Question 52

There are two reactants in a chemical equation, and one product.  The mass of the product is 30g.  The mass of the first reactant is 17g.  What must the mass of the second reactant be, if the equation is to follow the law of conservation of mass?

Accepted Answer

13g

Answer

47g

Answer

23g

Answer

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