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Extra Credit Opportunity

Total questions: 29

Worksheet time: 2hrs 25mins

Name
Class
Date
1.
2H2  +   O2  →  2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?
a)
2
b)
4
c)
6
d)
8
2.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
3.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
4.
Two Reactants and One Product
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
5.
Always starts with a Hydrocarbon that reacts with oxygen and produces carbon dioxide and water. 
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
6.
One reactant into several products.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
7.
One element replaces another in a compound.
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
8.
Ions in two compounds switch. 
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
9.
What is the type of reaction shown at the top?
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
10.
H2O + C yields H2 + CO2
1. Balance the equation,
2. what type reaction is this
a)
4:2:4:2
Decomposition
b)
1:1:1:2
Single Replacement
c)
2:1:2:1
Double Replacement
d)
2:1:2:1
Single Replacement
11.
What does the heat capacity of an object measure?
a)
the amount of energy required to change the temperature of an object
b)
the total amount of energy an object can store
c)
the thermal potential energy of the object
d)
the amount of work done by the object
e)
the amount of energy required to melt a solid object
12.
When applying the first law of thermodynamics to a system, when is heat a positive quantity?
a)
when the system does work
b)
when the system has work done on it
c)
when the system absorbs heat
d)
when the system loses heat
e)
when no work is done either on the system or by the system
13.
The product of the pressure and volume of a system  has the same SI units as which one of the following choices?
a)
force
b)
work
c)
acceleration
d)
momentum
e)
impulse
14.

What does R stand for

a)

Ideal gas constant

b)

Real gas constant

c)

Temperature constant

d)

Ideal gas law

15.

Which of the following equations represents the Ideal Gas Law?

a)
b)
c)
d)
16.

The entropy will usually increase when

a)

a molecule is broken into two or more smaller molecules

b)

a reaction occurs that results in an increase in the number of moles of gas

c)

a solid changes to a liquid

d)

all of these

17.

Systems in nature tend to undergo changes toward

a)

lower energy and less disorder

b)

lower energy and more disorder

c)

higher energy and less disorder

d)

higher energy and more disorder

18.

Which sample has the lowest entropy?

HINT - Look at the phase of each chemical....

a)

1 mole of KNO3(l)

b)

1 mole of KNO3(s)

c)

1 mole of H2O(l)

d)

1 mole of H2O(g)

19.

Entropy is a measure of

a)

accuracy

b)

precision

c)

the disorder of a system

d)

the attraction of a nucleus for an electron

20.

What phase of matter has the most entropy?

a)

solid

b)

liquid

c)

gas

21.

What happens at absolute zero?

a)

All Motions cease

b)

everything turns to a solid

c)

everything dies

d)

who knows?

22.

Why is absolute zero unreachable?

a)

It takes an amount of work to drop a temperature, and to reach absolute zero it will require a infinite amount of work.

b)

Because absolute zero is an infinitely unreachable limit regarding to its state of matter.

23.

Which temperature scale does not have a negative values?

a)

Celsius

b)

Fahrenheit

c)

Kelvin

d)

all of the above

24.

Which law states that if two systems or objects are in thermal equilibrium with a third system or object, then they are in thermal equilibrium with each other?

a)

First law

b)

Second law

c)

Third law

d)

Zeroth law

25.
The amount of force pushing on an area is the definition of....
a)
Fluid
b)
Viscosity
c)
Barometer
d)
Pressure
26.
Pressure is measured in what units
a)
Newtons
b)
m/s
c)
Pascals
d)
Moles
27.
True or false:
Pressure depends on depth
a)
true
b)
false
28.
As you climb up a mountain what happens to the air pressure?
a)
decreases
b)
increases
c)
stays the same
29.

The weight of air molecules pressing down on Earth

a)

temperature

b)

air pressure

c)

humidity

d)

precipitation

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