Download Name: Per: ____ Moles/Balancing Homework Packet This packet is

Name: ___________________________________ Per: ____
Moles/Balancing Homework Packet
This packet is due ______________
This packet contains:
1. Mole problems
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2. Percent composition
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3. Balancing equations
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4. Questions for Textbook readings
a. “Methyl Alcohol” pg 265
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5. Vocabulary sheet (use notes)
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6. True and false
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7. Castle Learning Score
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Total points
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Mole Vocabulary
Mole
Conservation of
Mass
Balanced Equation
Reactants
Products
Coefficient
Gram Formula
Mass
Molecular Formula
Empirical Formula
Molar Volume of a
Gas
Moles Worksheet
1)
Define “mole”.
2)
How many moles are present in 34 grams of Cu(OH)2?
3)
How many moles are present in 2.45 x 1023 molecules of CH4?
4)
How many grams are there in 3.4 x 1024 molecules of NH3?
5)
How much does 4.2 moles of Ca(NO3)2 weigh?
6)
What is the gram formula mass of MgO?
7)
How are the terms “gram formula mass” and “atomic mass” different from one another?
8)
Which is a better unit for expressing gram formula mass, “amu” or “grams/mole”? Explain your reasoning
Mole Calculation Worksheet
1)
How many moles are in 15 grams of lithium?
2)
How many grams are in 2.4 moles of sulfur?
3)
How many moles are in 22 grams of argon?
4)
How many grams are in 88.1 moles of magnesium?
5)
How many moles are in 2.3 grams of phosphorus?
6)
How many grams are in 11.9 moles of chromium?
7)
How many moles are in 9.8 grams of calcium?
8)
How many grams are in 238 moles of arsenic?
What are the gram formula masses of the following compounds?
9)
NaOH
12)
H3PO4
10)
H2O
13)
Mn2Se7
11)
MgCl2
14)
(NH4)2SO4
Percentage Composition Worksheet
Give the % composition of all elements in these compounds. Show all work!
________________________________________________________________
1)
NH4SO3
% N ______
% H ______
% S ______
% O ______
________________________________________________________________
2)
Al(C2H3O2)3
% Al ______
% C ______
% H ______
% O ______
________________________________________________________________
3)
NaBr
% Na ______
% Br ______
________________________________________________________________
4)
Cu(OH)2
% Cu ______
% O ______
% H ______
________________________________________________________________
5)
MgCO3
% Mg ______
% C ______
% O ______
________________________________________________________________
Balancing Chemical Equations
Balance the equations below:
1)
____ N2 + ____ H2  ____ NH3
2)
____ KClO3  ____ KCl + ____ O2
3)
____ NaCl + ____ F2  ____ NaF + ____ Cl2
4)
____ H2 + ____ O2  ____ H2O
5)
____ Pb(OH)2 + ____ HCl  ____ H2O + ____ PbCl2
6)
____ AlBr3 + ____ K2SO4  ____ KBr + ____ Al2(SO4)3
7)
____ CH4 + ____ O2  ____ CO2 + ____ H2O
8)
____ C3H8 + ____ O2  ____ CO2 + ____ H2O
9)
____ C8H18 + ____ O2  ____ CO2 + ____ H2O
10)
____ FeCl3 + ____ NaOH  ____ Fe(OH)3 + ____NaCl
11)
____ P + ____O2  ____P2O5
12)
____ Na + ____ H2O  ____ NaOH + ____H2
13)
____ Ag2O  ____ Ag + ____O2
14)
____ S8 + ____O2  ____ SO3
15)
____ CO2 + ____ H2O  ____ C6H12O6 + ____O2
Is this Statement True or False?
The following statements can be true or false. You must identify it as true or false and then
explain your reasoning for your answer.
1. An equation is balanced when there are the same numbers of molecules on both sides.
2. The masses of the products have to equal the masses of the reactants.
3. In a single replacement reaction there must be an element only in the reactants.
4. A synthesis reaction has 2 reactants but only 1 product
5. A mole is a unit of mass.
6. A mole of any gas always has a volume of 22.4 Liters.
7. Grams can be converted directly into particles.
8. You can change a coefficient to balance an equation.
9. There are the same numbers of molecules in 32.0 g of O2 as there are in 71 g of Cl2.
Methyl Alcohol: Fuel with a Future? P. 265
1) What are TWO advantages of replacing gasoline with methyl alcohol (methanol)?
2) What are the dangers of Carbon Monoxide and Nitrogen dioxide in our atmosphere?
3) What reaction causes the formation of Nitrogen dioxide?
4) What are three problems of using Methyl alcohol instead of gasoline?
5) Balance the following equation for the combustion of methanol:
____CH3OH + ____O2  ____CO2 + ____H2O
6) Why is this classified as a combustion reaction?