Quiz about Unit 1 - Properties & Conservation of Mass

Question 1

How many Hydrogen are in 4H₂O?

Accepted Answer

8

Answer

6

Answer

2

Answer

4

Question 2

How many Oxygen are in H₂O?

Accepted Answer

1

Answer

2

Answer

0

Answer

4

Question 3

2H₂ + O₂ ----> 2H₂O What are the products?

Accepted Answer

2H2O

Answer

------>

Answer

2H₂+ O₂

Question 4

2H₂ + O₂--------> 2H₂O What are the reactants?

Accepted Answer

2H₂ +O₂

Answer

----->

Answer

2H2O

Question 5

How many Magnesium are in 10MgCl₂?

Accepted Answer

10

Answer

5

Answer

20

Question 6

How many elements are in C₆H₁₂O₆?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 7

How many atoms are there TOTAL in:
H₂SO₄

Accepted Answer

7

Answer

6

Answer

5

Answer

3

Question 8

(Element or Compound)
C₂H₈O

Accepted Answer

Compound

Answer

Element

Answer

Letters

Answer

Numbers

Question 9

How many Elements are in the compound C₂H₈O ?

Accepted Answer

3

Answer

2

Answer

1

Answer

0

Question 10

A capital letter or combination of a capital letter and a small letter that is used to represent an element is called a(n) ________

Accepted Answer

chemical symbol

Answer

abbreviation

Question 11

A subscript is the small number below and to the right of a(n) ________ that tells the number of _______ of that element.

Accepted Answer

element symbol; atoms

Answer

atom; element symbol

Answer

subscript; protons

Answer

compound; elements

Question 12

Which equation obeys the law of conservation of mass?

Accepted Answer

C + 2H₂ ----> CH₄

Answer

H₂ + O₂ ------> H₂0

Answer

2Fe₂O₃ ------> 2O₂ + 4Fe

Question 13

The law of conservation of matter states that

Accepted Answer

atoms are neither created nor destroyed in chemical reactions.

Answer

chemical reactions change matter.

Answer

it is mandatory that you recycle.

Answer

a chemical equation can be balanced or unbalanced.

Question 14

If there is no subscript by an element in a chemical formula, how many atoms of that element are there?

Accepted Answer

only 1

Answer

0

Answer

2

Answer

1 million

Question 15

Which side of a chemical equation is the reactant side?

Accepted Answer

Left (before the yields sign)

Answer

Right (after the yields sign)

Question 16

Which side of a chemical equation os the product side?

Accepted Answer

Right (after the yields sign)

Answer

Left (before the yields sign)

Question 17

Which chemical equation is balanced?

Accepted Answer

2Na + 2H₂O --> 2NaOH + H₂

Answer

PbO₂ + 2H₂

Answer

SO₂ + H₂0 --> H₂SO₄

Question 18

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 19

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

Accepted Answer

No

Answer

Yes

Question 20

What is the Law of Conservation of mass?

Accepted Answer

Chemical equations must have the same number and type of atoms before and after a reaction

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 21

A chemical reaction is balanced when

Accepted Answer

Both sides have the same number and type of atoms

Answer

both sides have the same elements

Answer

Same subscripts

Answer

Same coefficients

Question 22

The big number in front of a chemical formula is a __________ and it tells us the number of __________ present in that formula

Accepted Answer

Coefficient; Molecules

Answer

Subscript; Atoms

Answer

Superscript;Molecules

Answer

Charge;Atoms

Question 23

How many nitrogen atoms does NH₃ have?

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 24

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 25

Mass cannot be created or__________ during a chemical reaction?

Accepted Answer

Destroyed

Answer

Reacted

Answer

Transferred

Answer

Born

Question 26

Which compounds are the PRODUCTS of this reaction?

Accepted Answer

CO₂ + H₂O

Answer

C₆H₁₂O₆ + O₂

Answer

C₆H₁₂O₆+ CO₂

Answer

H₂O + O₂

Question 27

Which compounds are the REACTANTS of this reaction?

Accepted Answer

C₆H₁₂O₆ + O₂

Answer

CO₂ + H₂O

Answer

C₆H₁₂O₆+ CO₂

Answer

H₂O + O₂

Question 28

How many different elements are in the REACTANTS side of this balanced equation?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 29

2Al₂O₃is on the ____________ side of this equation.

Accepted Answer

Products

Answer

Reactants

Question 30

Dissolving sugar in water is an example of a _____.

Accepted Answer

Homogeneous Mixture

Answer

Heterogeneous Mixture

Question 31

Which is an example of a physical property?

Accepted Answer

state of matter

Answer

ability to react with acid

Answer

flammability

Answer

ability to react with oxygen

Question 32

How many Hydrogen atoms are in this chemical formula?

8Fe(H₂O)₄(OH)₂

Accepted Answer

80

Answer

16

Answer

64

Answer

72

Question 33

How does the Law of Conservation of Mass apply to chemical reactions?

Accepted Answer

The reactants and products must have exactly the same number and type of atoms.

Answer

The reactants must have fewer atoms than the products.

Answer

The products must have twice as many atoms as the reactants.

Answer

The reactants and products must have close to the same number and type of atoms.

Question 34

Which is an example of a heterogeneous mixture?

Accepted Answer

salad

Answer

sugar water

Answer

brass

Answer

table salt

Question 35

Smallest and basic particle of matter

Accepted Answer

atom

Answer

element

Answer

compound

Answer

mixture

Question 36

A combination of two or more substances that are not chemically combined

Accepted Answer

mixture

Answer

element

Answer

atom

Answer

compound

Question 37

A mixture in which different materials can be easily distinguished

Accepted Answer

heterogeneous mixture

Answer

homogeneous mixture

Answer

chemical formula

Answer

molecule

Question 38

A group of atoms bonded together

Accepted Answer

molecule

Answer

chemical formula

Answer

chemical bond

Answer

solution

Question 39

A mixture that forms when one substance dissolves another

Accepted Answer

solution

Answer

molecule

Answer

pure substance

Answer

compound

Question 40

What is CO2 an example of?

Accepted Answer

Compound

Answer

Element

Answer

Atom

Answer

Mixture

Question 41

Lemonade consists of several substances that are NOT chemically combined, so lemonade is classified as

Accepted Answer

a mixture

Answer

pure substance

Answer

a compound

Answer

an element

Question 42

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 43

Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.

Accepted Answer

The mass of the reactants equals the mass of the products.

Answer

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

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 44

What happens to atoms in a chemical reaction?

Accepted Answer

they are rearranged

Answer

they are destroyed

Answer

they are created

Question 45

Pure water is _______ on the pH scale.

Accepted Answer

Neutral

Answer

Acid

Answer

Base

Question 46

If the pH of a solution is 9, it is a....

Accepted Answer

base

Answer

acid

Answer

both

Answer

none

Question 47

Which is the stronger acid?

Accepted Answer

pH 1

Answer

pH 4

Answer

pH 8

Answer

pH 13

Question 48

Which of the following substances is basic?

Accepted Answer

Baking soda

Answer

Apple juice

Answer

Ginger ale

Answer

Distilled water

Question 49

Which pH number below reflects a weak acid?

Accepted Answer

6

Answer

1

Answer

8

Answer

13

Question 50

Which pH number below reflects a weak base?

Accepted Answer

8

Answer

1

Answer

6

Answer

13

Question 51

What does a pH scale do?

Accepted Answer

All of these are true.

Answer

Tells you if a substance is an acid.

Answer

Tells you if a substance is a base.

Answer

Measures the strength or weakness of an acid or base.

Question 52

Which of the following is an example of COHESION?

Accepted Answer

water sticking to water

Answer

water sticking to glass

Answer

oil sticking to plastic

Answer

hydrogen sticking to oxygen

Question 53

What is the term for water's ability to defy gravity and climb up a tube?

Accepted Answer

Capillary Action

Answer

Specific Heat

Answer

Universal Solvent

Answer

Magic

Question 54

Surface tension of water is the cohesive force between water molecule and other molecule.

Accepted Answer

False

Answer

True

Question 55

What word describes when water is attracted to other substances?

Accepted Answer

adhesion

Answer

cohesion

Answer

capillary action

Answer

surface tension

Question 56

The tightness across the surface of water that enables paper clips to float is ____________.

Accepted Answer

surface tension

Answer

adhesion

Answer

capillary action

Answer

polarity

Question 57

True or False

This chemical equation demonstrates the Law of Conservation of Matter

Accepted Answer

True

Answer

False

Question 58

True or False

This chemical equation represents the Law of Conservation of Matter

Accepted Answer

False

Answer

True

Unit 1 - Properties & Conservation of Mass

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