Multiple Choice
|
|
|
1.
|
In an endothermic reaction,
a) | temperature of the surroundings increases. | b) | heat flow out of the
system. | c) | energy is absorbed by the system. | d) | the products have less energy than the
reactants. |
|
|
|
2.
|
How many moles of CO 2 can be produced by the reaction of 5.00 mol of
C 2H 4 and 12.0 mol of O 2 as shown below? a) | 4.00 mol | b) | 10.0 mol | c) | 5.00
mol | d) | 8.00 mol |
|
|
|
3.
|
How many moles of water are produced when 2.50 moles of oxygen react with excess
hydrogen as shown below: a) | 5.00 mol | b) | 3.50 mol | c) | 1.25
mol | d) | 2.00 mol |
|
|
|
4.
|
In the diagrams below, the green spheres represent chlorine atoms, yellow-green
spheres represent fluorine and the white spheres represent hydrogen atoms. Based on this
information, classify the reaction indicated below: a) | double replacement | c) | Single replacement | b) | Decomposition | d) | Synthesis |
|
|
|
5.
|
The reaction  is an example of a) | decomposition | b) | combination | c) | single
replacement | d) | double replacement |
|
|
|
6.
|
How many moles of NH 3 are needed to react completely with 13.6 mol of
F 2, as shown below? a) | 6.80 mol | b) | 5.44 mol | c) | 2.27
mol | d) | 34.0 mol |
|
|
|
7.
|
How many moles of NH 3 are needed to react completely with 13.6 mol of
F 2, as shown below? a) | 2.27 mol | b) | 6.80 mol | c) | 5.44
mol | d) | 34.0 mol |
|
|
|
8.
|
What type of reaction is shown below? CH 4 + 2 O 2 
CO 2 + 2 H 2O + 218 kcal a) | Single replacement | b) | Endothermic | c) | decomposition | d) | Exothermic |
|
|
|
9.
|
Cold packs, used in athletic and medical applications, work by lowering
temperature when ammonium nitrate is dissolved in water. Which of the following statements is
true for this process?
|
|
|
10.
|
In the reaction shown below, how many kcal of heat is required to produce 32.0 g
of O 2? a) | 137 kcal | b) | 68.5 kcal | c) | 548
kcal | d) | 274 kcal |
|
|
|
11.
|
How many grams of oxygen are needed to completely react with 200.0 g of
NH 3, as shown below? a) | 3.406 g | b) | 300.6 g | c) | 2.180
g | d) | 469.7 g |
|
|
|
12.
|
When the equation shown below is balanced, the proper sequence of coefficients
for each substance is a) | 2, 3, 3, 1 | b) | 3, 2, 1, 6 | c) | 2, 3, 6,
1 | d) | 2, 3, 1, 6 |
|
Short Answer
Complete and balance each reaction shown below:
|
|
|
13.
|
|
|
|
14.
|
|