WorksheetsChemistry Final Exam Review Units 8-10
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Ammonia (NH₃) is used to make fertilizer. If you have 2.5 mol of ammonia, how many grams of H₂ did you start with? N₂ + 3 H₂ → 2 NH₃
a)
1.96 g H₂
b)
75 g H₂
c)
7.5 g H₂
d)
6.0 g H₂
2.
Calculate the number of moles of KCl if you have 2.0 g of it.
a)
0.0265 moles KCl
b)
3.37 moles KCl
c)
0.297 moles KCl
d)
3.36 moles KCl
3.
How many grams of sodium chloride can be produced from 5 g of sodium in the presence of excess chlorine? 2 Na + Cl₂ → 2 NaCl
a)
140 g
b)
13 g
c)
70. g
d)
44 g
4.
If you have 3 moles of Na and 1 moles of Cl₂, which is the limiting reagent? 2 Na + Cl₂ → 2 NaCl
a)
Na
b)
Cl₂
c)
NaCl
d)
there is no limiting reagent
5.
If a reaction is supposed to produce 17 g of product, but you only get 12 g, what was the percent yield of the reaction?
a)
10%
b)
71%
c)
80%
d)
170%
6.
If the pressure exerted by a gas at 25℃ in a volume of 4.5 L is 3.0 atm, how many moles of gas are present?
a)
0.55 moles
b)
6.6 moles
c)
0.045 moles
d)
37.5 moles
7.
Convert 140 mmHg to atm?
a)
4.5 atm
b)
2.2 atm
c)
0.18 atm
d)
0.22 atm
8.
You have 0.22 L of NO₂ at a temperature of 295K and a pressure of 0.88 atm. What volume will the NO₂ gas occupy at 0.77 atm and 314 K?
a)
0.16 L
b)
0.27 L
c)
2.9 L
d)
1.7 L
9.
What is temperature?
a)
a form of heat transfer where energy is radiated in the form of rays
b)
a form of heat transfer
c)
a form of energy contained in an object associated with the motion of molecules
d)
a measure of the hotness or coldness of an object.
10.
When you increase the temperature of a gas, the gas molecules _______.
a)
move faster
b)
move slower
c)
move at the same speed
d)
collide less
11.
If a gas is at STP, what volume will 1 mole of gas occupy?
a)
impossible to determine with the given information
b)
22.4 liters
c)
47 milliliters
d)
0.543 liters
12.
What is the pH of a solution with a pOH of 12?
a)
0
b)
2
c)
12
d)
14
13.
What makes strong acids different from weak acids?
a)
strong acids fully dissociate in water
b)
weak acids fully dissociate in water
c)
strong acids let less protons loose in water
d)
weak acids release more protons in water
14.
A _______ solution contains all of the solute that it can hold at a given temperature.
a)
saturated
b)
unsaturated
c)
supersaturated
d)
desaturated
15.
The substance dissolved in a solution is called the ________.
a)
solution
b)
solute
c)
solvent
d)
water
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