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Chemistry 2

Total questions: 29

Worksheet time: 19mins

Name
Class
Date
1.
Acids react with
a)
water to produce bases and salts
b)
salts to produce bases and water
c)
neither bases, salts nor water
d)
bases to produce salts and water
2.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

3.
Releases hydrogen in an aqueous solution.
a)
base
b)
strong base
c)
acid
d)
weak base
4.

Which of these pH values represent an acid?

a)

4

b)

8

c)

10

d)

12

5.

Which of the following is a property of a base?

a)

bitter taste

b)

reacts with metals

c)

salty

d)

sour taste

6.
Balance this equation
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
7.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
8.
N2 + H2 = NH4
a)
Balanced
b)
Unbalanced
9.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
10.
Name the part in red:

H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Yield
d)
Subscript
11.
Name the part in red:

_2_H2 + _1_O2 -> _2_H2O
a)
Coefficient
b)
Product
c)
Yield
d)
Subscript
12.
Name the part in red:

H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Reactant
d)
Subscript
13.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
14.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
15.

What is the right part of a chemical equation called...

H2 + O2 --> H2O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

16.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
17.

A substance that is formed as the result of a chemical reaction is a __________________

a)

Product

b)

Reactant

c)

Starters

d)

Enders

18.

Look at the Chemical reaction below

6CO2 + 6H2O + Light energy → C6H12O6 + 6O2

Which statement is true?

a)

There are 2 total Carbon atoms

b)

There are 3 total Oxygen atoms

c)

There are 18 total Oxygen atoms

d)

There are 29 total Hydrogen atoms

19.

The teacher cut a 5 cm piece of Magnesium and placed it in a test tube containing Hydrochloric acid. Students observed bubbles and a cloudy, white vapor rising up from the Magnesium ribbon. Which of the following is not evidence that a chemical reaction occurred between the Magnesium and Hydrochloric acid?

a)

A cloudy, white vapor was formed.

b)

The students observed bubbles

c)

The magnesium was cut into a 5 cm piece

d)

A new substance with different properties was formed.

20.

The table shows the density of different known substances. A student measured the volume of a piece of aluminum using water displacement. The volume was 3.0 cm3. Using the volume and density measurements, calculate the mass in grams of aluminum in the student's sample.

a)

0.9 g/cm3

b)

2.97 g/cm3

c)

33.9 g/cm3

d)

8.1 g/cm3

21.

A compound secreted by honeybees to paralyze intruders in their hive is known as 2-heptanone. The formula for this compound is shown.

CH3C4H8COCH3

How many atoms of each element are in one molecule of 2-heptanone?

a)

4 Carbon atoms, 11 Hydrogen atoms, and 1 Oxygen atom

b)

7 Carbon atoms, 14 Hydrogen atoms, and 1 Oxygen atom

c)

7 Carbon atoms, 11 Hydrogen atoms, and 8 Oxygen atoms

d)

6 Carbon atoms, 14 Hydrogen atoms, and 3 Oxygen atoms

22.

How many more Oxygen atoms are represented in the formula of Aluminum Sulfate, Al2(SO4)3 than in the formula for Barium Hydroxide, Ba(OH)2?

a)

2

b)

3

c)

5

d)

10

23.

Is an organic compound that changes color in acids or bases. Litmus paper turns red in an acid and blue in a base

a)

Acid

b)

Base

c)

Indicator

d)

Neutralization

24.

CH4+2O2→CO2+2H2OCH_4+2O_2→CO_2+2H_2O  


The reactants in the methane combustion formula are:

a)

CH4CH_4  

b)

CO2+2H2OCO_2+2H_2O  

c)

CH4+2O2CH_4+2O_2  

d)

CO2CO_2  

25.

CH4+2O2→CO2+2H2OCH_4+2O_2→CO_2+2H_2O  


The products in the methane combustion formula are:

a)

CH4CH_4  

b)

CO2+2H2OCO_2+2H_2O  

c)

CH4+2O2CH_4+2O_2  

d)

CO2CO_2  

26.

You took the temperature of a substance before a chemical reaction and it was 24 degrees Celsius.  You then took the temperature of the products and it was 45 degrees Celsius. The type of chemical reaction is called ________________. 

a)

exothermic

b)

cryptothermic

c)

endothermic

d)

hypothermic

27.

You took the temperature of a substance before a chemical reaction and it was 34 degrees Celsius.  You then took the temperature of the products and it was 22 degrees Celsius. The type of chemical reaction is called ________________. 

a)

exothermic

b)

cryptothermic

c)

endothermic

d)

hypothermic

28.

Select ALL of the examples of a chemical reaction:

a)

steel wool burning

b)

ice melting

c)

a puddle evaporating

d)

copper pipe rusting

e)

fireworks

29.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water

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