WorksheetsSm 1, Unit 1 Amnesty Week Study Guide
Total questions: 51
Worksheet time: 5hrs 11mins
How many molecules are in 2.5 mol of NaCl?
1.51x1023
146
4.15
1.51x1024
What is a mole ratio?
An animal that burrows underground.
How many moles of reactant are used up in a chemical reaction.
The ratio of a reactant / product to a different one - compared by the number of particles.
The process by which we multiply fractions by using numbers from a chemistry problem.
Where are the numbers for a mole ratio found?
They are part of the chemical formulas for the reactants / products.
They are given in the problem.
They are found on the periodic table for those elements.
They are found as coefficients in the reaction's balanced chemical equation.
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
Ethane (C2H6) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
Ethane (C2H6) combusts in the above reaction. What is the mole ratio of carbon dioxide to water?
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
A problem asks how many moles of oxygen gas are needed to react completely with 6 moles of ethane (C2H6). What is the first step in setting up the problem?
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
A problem asks how many moles of oxygen gas are needed to react completely with 6 moles of ethane (C2H6). What is the second step in setting up the problem?
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
A problem asks how many moles of oxygen gas are needed to react completely with 6 moles of ethane (C2H6). What is the final answer for this problem?
13 mol C2H6
3 mol O2
21 mol O2
42 mol O2
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
New problem: If 16 moles of carbon dioxide are formed by this reaction, how many moles of water were also produced?
4 mol H2O
6 mol H2O
24 mol H2O
96 mol H2O
384 mol H2O
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
New problem: If 3.5 moles of oxygen gas are used up as ethane combusts completely, how many moles of carbon dioxide are produced?
0.5 mol CO2
0.57 mol CO2
2.0 mol CO2
3.0 mol CO2
3.5 mol CO2
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
New problem: How many moles of ethane (C2H6) are required to produce 13.5 moles of water from the above reaction?
4.5 mol C2H6
27 mol C2H6
40.5 mol C2H6
81 mol C2H6
162 mol C2H6
N2 + 3H2 → 2NH3
How many moles of H2 is needed to react with 2 moles of N2?
6
3
2
1
2H2 + O2 → 2H2O
How many moles of H2O is produced when 8 moles of H2 reacts fully?
1
2
8
16
S8 + 12 O2 → 8 SO3
How many moles of S8 is needed to produce 12 moles of SO3?
1
1.5
2
12
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
How many moles of CO2 is produced when 3 moles of H2O is also produced?
2
3
4
4.5
2H2 + O2 → 2H2O
How many moles of O2 is needed to produce 7 moles of H2O?
1
2
3.5
14
2 KClO3 → 2 KCl + 3 O2
How many moles of KCl is produced when 6.75 moles of O2 is also produced?
2
3.5
4.5
6.75
S8 + 12 O2 → 8 SO3
How many moles of S8 is needed to react with 3 moles of O2?
0.25
1
4
36
N2 + 3H2 → 2NH3
How many moles of N2 is needed to produce 3.5 moles of NH3?
1
1.5
1.75
3
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
How many moles of CO2 is produced when 17.5 moles of O2 reacts fully?
4
7
10
30.63
4 Fe + 3 O2 → 2 Fe2O3
How many moles of Fe is needed to react with 9.75 moles of O2?
3
4
13
39
What is Avogadro's number?
6.02 x 1023
1 mole
600 million
6.02
How many moles are in 6.02 x 1023 molecules of H2O?
1 mole
2 moles
6.02 moles
602000000000000000000000 moles
One mole of carbon dioxide (CO2) contains 6.02 x 1023 _____.
atoms
formula units
ions
molecules
How many moles are in 8.30 X 1023 molecules of H2O?
1.38 X 1023 moles H2O
1.38 moles H2O
2 moles H2O
1 mole H2O
How many molecules are there in 31.8 moles of water?
5.28 x 10-23 molecules
1.91 x 1025 molecules
5.28x 10-25 molecules
1.91 x 1023 molecules
A mole is:
The SI unit for mass
The SI unit for the amount of a substance
The SI unit for volume
The SI unit for area
What is the conversion factor that should be used to determine how many molecules are there in 4.00 moles of glucose, C6H12O6?
What converting from moles to the number of particles, moles is multiplied by:
an equivalent value
a conversion factor
the number of atoms in the formula
the mass of the substance
Which has the most particles?
1 mole H2
1 mole Na1+
1 mole Al(OH)3
These are all the same
How many atoms are in 1 mole of Iodine (I)?
6.022 x 1023
4.022 x 1023
6.022 x 1025
4.022 x 1025
Why is the mole used in chemistry?
The mass of atoms is in AMUs which is too hard to convert to grams.
A dozen is not a scientific amount.
Chemists needed to make chemistry easier to understand.
It makes counting large numbers of small particles easier.
SELECT ALL CORRECT ANSWERS - The mole can be used to measure:
The amount of atoms in an element
The amount of molecules in a covalent substance
The amount of formula units in an ionic compound
The amount of mass an object has
How many moles there are in 5.68 x 1024 formula units of AlCl3?
3.42 x 1024 moles
9.44 x 1024 moles
9.44 moles
3.42 moles
What is correct equation that should be used to determine how many molecules there are in 0.75 moles of (NH4)3PO4?
How many moles are in 4.5 x 1024 atoms of lithium?
2.71 x 1048 particles
7.47 moles
7.47 x 1024 atoms
2.71 moles
How is moles abbreviated?
M
m
mol
ml
What is the correct equation to determine how many calcium ions (Ca2+) in 2 moles?
This cannot be determined as calcium is not bonded.
How many moles of Na contain 1.45 x 1021 atoms of Na?
8.73 x 1044 moles
8.73 moles
0.00241 moles
2.41 x 1044 moles
What is the correct equation to calculate the number of moles in 3.13 x 1026 molecules of H2O2?
What are the units for Avogadro's number?
meters
particles
grams
liters
