Assignment

1.
What do the coefficients in a balanced chemical equation tell you?
A.
Amount of energy produced
B.
Number of moles which react
C.
Physical state of the compounds reacting
D.
Elements involved in the reaction

2.
In terms of stoichiometry, a balanced chemical equation alone tells you all of the following EXCEPT:
A.
The elements involved in the reaction
B.
The ratio of number of moles of substances in the reaction
C.
How fast the reaction will occur
D.
The products and reactants

3.
WHERE would you find the mass of 1 mole of an element? (What source?)
A.
Periodic Table
B.
Avogadro's Number
C.
Dictionary
D.
Polyatomic Ion Sheet

4.
What is the mass of 1 mole of Silicon?
A.
6.02 x10²³ atoms
B.
14 g
C.
28.1g
D.
22.4 L

5.
In the equation, 2H₂+O₂→2H₂O, what substance(s) are the product(s)?
A.
H₂
B.
O₂
C.
H₂O
D.
H₂ and O₂

6.
Given the following equation: Cu+2AgNO₃→Cu(NO₃)₂+2Ag. How many moles of Ag are produced from 6 moles of AgNO₃ ?
A.
0.33 mole Ag
B.
2 mole Ag
C.
3 moles Ag

7.
Given the following equation:2NaClO₃→2NaCl+3O₂ . If eight moles of NaClO₃ are used, how many moles of O₂ will be produced?

A.
3 moles O₂
B.
6 moles O₂
C.
12 moles O₂
D.
24 moles O₂

8.
How many grams of hydrogen gas (H₂) is produced if 10.0 mol of Zn are added to hydrochloric acid (HCl) according to the equation: Zn+2HCl→ZnCl₂+H₂

A.
20.2 g H₂
B.
10 moles H₂
C.
10.1 g H₂
D.
2.02 g H₂

9.
What mass in grams of sodium hydroxide (NaOH) is produced if 2.0 moles of sodium (Na) racts with water according to the chemical equation 2Na+2H₂O→2NaOH+H₂

A.
22.98 g NaOH
B.
45.96 g NaOH
C.
39.97 g NaOH
D.
79.9 g NaOH

10.
2KClO₃→2KCl+3O₂ How many moles of O₂ can be produced by letting 12.0 moles of KClO₃ react?

A.
3 moles O₂
B.
12 moles O₂
C.
18 moles O₂
D.
24 moles O₂

11.
The reactant that is totally consumed when a chemical reaction is complete is called the:

A.
Excess Reagent
B.
Limiting Reagent
C.
Actual Yield
D.
Theoretical Yield

12.
If a pitcher of kool aid takes 2 quarts of water, 1 packet of kool aid, and 1 cup of sugar, how many pitchers of kool aid can you make with unlimited water, 4 packets of kool aid, and 13 cups of sugar?

A.
13
B.
1
C.
4
D.
2

13.
What is your limiting reactant If you burn a 5.0 gram piece of carbon with a reaction of C+O₂→CO₂?

A.
Carbon
B.
Oxygen
C.
Carbon Dioxide
D.
None, it will burn forever

14.
The predicted amount of product(s) produced according to a calculation is ___________________.

A.
Theoretical Yield
B.
Limiting Reagent
C.
Actual Yield
D.
Percent Yield

15.
A chemistry student calculates from a balanced reaction that 81.9 g of NaCl should be produced. The reaction in the lab produces 49.6 g NaCl. What is the percent yield for the reaction?

A.
1.65%
B.
25%
C.
49.6%
D.
60.6%.