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Quizizz: Conservation of Mass

Total questions: 25

Worksheet time: 47mins

Name
Class
Date
1.

How many grams of sulfuric acid were used in the reaction?

a)

62 g

b)

98 g

c)

36 g

d)

100 g

2.

What happens to the total mass as the reaction takes place?

a)

The mass increases

b)

The mass decreases

c)

The mass remains constant

d)

The mass first increases then decreases

3.

Oxygen and oxygen containing compounds are involved in many different reactions. Which Balanced equation represents a reaction that involves 14 atoms of Oxygen?

a)

b)

c)

d)

4.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
5.
How many atoms of Oxygen are in Fe(NO3)3 ?
a)
6
b)
3
c)
9
d)
1
6.

How many atoms are present if there is no subscript following the element symbol?

a)

0

b)

2

c)

only 1

d)

1 million

7.
What is the Law of Conservation of mass?
a)
Mass is created in a chemical reaction
b)
Mass is created in a physical change
c)
New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
d)
Mass is never created or destroyed
8.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 
a)
4g
b)
5g
c)
9g
d)
14g
9.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
10.

The Coefficient (3) in the Chemical Formula, 3H2O, tells you how many _____________ there are.

a)

Atoms of Hydrogen

b)

Atoms of Oxygen

c)

Atoms of Water

d)

Molecules of Water

11.

How many sulfur atoms are on the reactant side of the equation?

Ca3(PO4)2 + 2H2SO4 → 2CaSO4 + Ca(H2PO4) 2

a)

2

b)

3

c)

4

d)

8

12.

How many molecules of HCl are in this equation:

Zn + 2HCl → ZnCl2 + H2

a)

1

b)

2

c)

3

d)

4

13.

Which equation represents the model below?

a)

2SO2 + O2 --> 2SO3

b)

N2 + H2 --> NH3

c)

2S2O + S2 --> S3O

d)

2H2O + O2 --> 2H3O

14.

4 grams of hydrogen and 32 grams of oxygen will combine to form:

a)

36 grams of water

b)

28 grams of hydroxide

c)

32 grams of oxygen

d)

36 grams of deuterium

15.

What would you have to do to prove that matter is conserved when a piece of paper is burned?

a)

Measure the mass of the paper before and after burning

b)

Observe the color change of the paper

c)

Calculate the temperature of the flame

d)

Compare the size of the paper before and after burning

16.

How many Hydrogen molecules are in the reactants?

a)

4

b)

2

c)

8

d)

1

17.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
18.
Jason poured 500 grams of water into a container and tightly sealed it. The water was allowed to freeze. Which is most likely true about the ice that formed?
a)
The mass of the ice is the same as the mass of the water.
b)
The mass of the ice is greater than the mass of the water.
c)
The ice formed is a different substance than the water.
d)
The ice formed is the same temperature as the water.
19.

What are the products in this chemical equation?

a)

CO2 + H2O

b)

H2O

c)

C6H12O6

d)

C6H12O6 + O2

20.

Select the chemical formula for this molecule?

a)

B1F3

b)

BF

c)

BF3

d)

FB

21.

An oreo cookie has a mass of 20 grams. It gets crushed into crumbs for a recipe. What is the mass of the crumbs?

a)

15 grams

b)

25 grams

c)

20 grams

22.

When sodium and chlorine combine to form sodium chloride, sodium chloride is the:

a)

Originator

b)

Reactant

c)

Product

23.
How many phosphorus atoms are in PO4?
a)
1
b)
2
c)
3
d)
4
24.
What is the arrow in a chemical equation...
H2 + O --> H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
25.

substances that result from a chemical reaction

a)
Ingredients
b)
Products
c)
Byproducts
d)
Reactants

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