WorksheetsChemistry 2020 Unit 5 Review
Total questions: 74
Worksheet time: 3hrs 0mins
What is the molar mass of fluorine gas?
(beware fluorine is diatomic F2!)
18.998 g/mol
38 g/mol
9 g/mol
18 g/mol
What is the molar mass of Cl2?
17 g/mol
35.5 g/mo;
71.0 g/mol
89 g/mol
What id the molar mass of UF6?
101 g/mol
238 g/mol
257 g/mol
352 g/mol
Calculate the molar mass of KOH.
28 g/mol
56 g/mol
84 g/mol
112 g/mol
Calculate the molar mass of CO2.
14 g/mol
28 g/mol
36 g/mol
44 g/mol
Calculate the molar mass of Ba(C2H3O2)2
255.3 g/mol
237.3 g/mol
228.3 g/mol
196.3 g/mol
Calculate the molar mass of Cu2O.
37 g/mol
45 g/mol
79.5 g/mol
143 g/mol
What is the molar mass of the diatomic element nitrogen?
7 g/mol
14 g/mol
28 g/mol
Calculate the molar mass of water (H2O).
10 g/mol
17 g/mol
18 g/mol
34 g/mol
Calculate the molar mass for Al(OH)3
78.0 g/mol
72 g/mol
28 g/mol
25 g/mol
Calculate the molar mass of NH4NO2
50 g/mol
60 g/mol
64 g/mol
78 g/mol
The number 6.022 x 1023 is called...
A dozen
Bohr's number
Buckley's number
Avogadro's number
To convert from moles to particles, you should multiply by ....
To convert from particles to moles, you should multiply by ....
5.11 x 1023 atoms of lithium (Li) is equal to how many moles?
1.18 moles
0.351 moles
1.34 moles
0.849 moles
0.75 mole of copper (Cu) is equal to how many atoms?
8.03 x 1023 atoms
6.02 x 1023 atoms
4.51 x 1023 atoms
3.11 x 1023 atoms
What is the mass of one mole of potassium (K)?
19 grams
39.10 grams
30.97 grams
38 grams
To convert from moles to grams, you should multiply by ....
To convert from grams to moles, you should multiply by ....
Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titanium?
47.86 g Ti / 1 mol Ti
1 mol Ti / 47.84 g Ti
47.84 mol / 1 g Ti
47.87 g Ti / 1 mol Ti
0.50 moles of carbon (C) is equal to how many grams?
6.0 grams
12.0 grams
8.0 grams
14.0 grams
36.0 g of beryllium (Be) contains how many moles?
0.25 mol
4.0 mol
45 mol
320 mol
How many atoms would be contained in 454 grams of iron (Fe)?
6.02 x 1023 atoms
8.14 atoms
4.90 x 1024 atoms
55.85 x 1023 atoms
Find the mass in grams of 2.25 x 1024 atoms of calcium (Ca).
40.0 grams
255.1 grams
150 grams
9.02 x 1024 grams
What is the mass of 2.50 mol of oxygen gas (O2)?
40.0 g
80.0 g
16.0 g
32.0 g
What is the mass of 6.25 mol of Cu(NO3)2?
126 g
785 g
625 g
1172 g
If I have 6.02 x 1023 molecules of CO2, what is the mass?
44.0 g
2.65 x1023 g
1.37 x1022 g
96.0 g
How many mL of stock solution of 2M NaCl do you need to prepare 100 mL of 0.150M NaCl?
7.5 mL
15 mL
1333 mL
200 mL
The term molar, which describes a solution's concentration, is written as?
M
mol
g
g/L
Calculate the Molarity in a solution containing 40.0 g of NaCl dissolved in 500.0 ml of H2O.
0.08 M
12.5 M
1.37 M
0.74 M
Molarity is ...
grams of solute/deciliters of solvent.
grams of solute/liters of solution.
moles of solute/liters of solution.
moles of solute/milliliters of solvent.
A solution is made by dissolving 0.50 mole of NaCl in enough water to give a final volume of 400.0 mL. What is the molarity of the solution?
0.10 M
0.40 M
1.25 M
2.33 M
If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add 560 mL more water to it?
.188 M
3.78 M
.389 M
1.76 M
How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?
27.8 mL
.278 mL
2.8 mL
278 mL
How many moles of solute are present in 50.0 mL of 0.20M KNO3?
10.0 moles solute
0.05 moles solute
1.00 moles solute
0.01 moles solute
If you use of 0.672 moles of magnesium. How many liters of magnesium would you need in the graduated cylinder for a 0.0446 M solution?
0.15L Mg
15.05L Mg
105L Mg
19,05L Mg
How many liters will 3.59 moles of N2 occupy?
80.4 L N2
40.8 L N2
0.408 L N2
0.804 L N2
How many moles does 65 L of CO2 gas contain?
2.9 Moles CO2
29 Moles CO2
1.9 Moles CO2
39 Moles CO2
How many moles are in 70.0L of O2 gas?
31.2 Moles 02
3.12 Moles 02
2.31 Moles 02
23.1 Moles 02
Calculate the volume of 3.44 moles methane, CH4 gas at STP
77.06 L CH4
62.1 L CH4
7.67 L CH4
6.02 L CH4
Convert 261.5 L of CO2 gas to moles..
11.7 moles
43.2 moles
27.1 moles
32.4 moles
How many moles are in 3.7 L of H2 gas?.
0.6 moles
0.2 moles
1.2 moles
7.32 moles
How many liters would 32.0 moles of Ar gas occupy?.
0.16.78
0.718
78.16 L Ar
716.8 L Ar
What is the difference between the atomic mass of an element and the molar mass of a compound?
The atomic mass is the added sum of ALL of the elements
The molar mass can be either the added sum of ALL the masses or the mass of a particular element
The molar mass and the atomic mass are always the same
The atomic mass of a compound is the average of H2O
The mole can be used to measure (SELECT ALL CORRECT ANSWERS)
The amount of atoms
The amount of molecules or compounds in a substance
The amount of particles
The amount of fission or fusion decay over time
0.75 mole of copper (Cu) is equal to how many atoms?
8.03 x 1023 atoms
6.02 x 1023 atoms
4.51 x 1023 atoms
3.11 x 1023 atoms
What is the correct mass for the compound, CaSO4•2H2O?
154.10 g/mol
156.12 g/mol
188.12 g/mol
172.17 g/mol
What is the correct mass for the compound, CrBr3•6H2O?
363.76 g/mol
319.90 g/mol
399.80 g/mol
417.82 g/mol
As we dilute a solution.....
The volume increases and the molarity (M) increases
The volume increases and the molarity (M) decreases
The volume decreases and the molarity (M) increases
The volume decreases and the molarity (M) decreases
The term molar which is used to describe a solution's concentration, is written as?
M
mol
g
g/L
The units "M" can also be written as:
mol/L
moles
g/L
g/mol
If you have 34 mL of a 0.5 M NaBr solution, what will the concentration be if 56 mL of water is added to it?
.188 M
3.78 M
.389 M
1.76 M
If 1 mole of solute is dissolved in 1 liter of water, what is the molarity?
2M
.5M
1M
It can't be determined unless you know the solute
