WorksheetsQ2 M7 - MOLE CONCEPT
Total questions: 51
Worksheet time: 18mins
Name
Class
Date
1.
How many particles are equal to 1 mole?
a)
6.02 x 1022 particles
b)
6.02 x 1023 particles
c)
6.02 x 1024 particles
d)
6.02 x 1025 particles
2.
Which of the following units is used in expressing the amount of substance in terms of the number of particles?
a)
celsius
b)
gram
c)
liter
d)
mole
3.
Schaiemour measured the mass of 10 pieces of each of the following materials: marble, pebble, and ballpen cap. What will be her findings based on the data she obtained?
a)
Different materials have different masses.
b)
Materials of different kind differ in amount, color and texture.
c)
The same number of materials has different colors and appearance.
d)
The same number of materials of different kinds has different masses.
4.
The following are representative particles of matter, which among them represents a covalent compound?
a)
atom
b)
ion
c)
molecule
d)
particle unit
5.
What do you expect to observe in a “Mole Exhibit of Different Substances?
a)
different kind of elements
b)
different colors of substances
c)
showcase of 1mole of different elements having different masses
d)
showcase of 1mole of different substances having the same masses
6.
Given that Ca - 40, O - 16 and H - 1, what is the mass of Ca (OH)2?
a)
57 g
b)
58 g
c)
73 g
d)
74 g
7.
What is the representative particle of ionic compounds?
a)
atom
b)
formula unit
c)
ion
d)
molecule
8.
Calcium carbonate (CaCO3 Molar Mass = 100 g/mole) is an antacid used to neutralize extra acid in the stomach. Lorie is prescribed by the doctor to take 250 mg tablet of CaCO3 three times a day. How many moles of CaCO3 will Lorie consume for 3 days?
a)
0.0225 moles
b)
0.0235 moles
c)
0.0242 moles
d)
0.0252 moles
9.
Which term best completes the second relationship? dozen: eggs while mole: _____
a)
6.02 x 10^20
b)
6.02 x 10^21
c)
6.02 x 10^22
d)
6.02 x 10^23
10.
Methane (CH4 Molar Mass = 16 g/mol) is one of the greenhouse gases. If 32.08 g of CH4 is released in the atmosphere, how many molecules of CH4 are added in the atmosphere?
a)
1.21 x 10^24
b)
1.21 x 10^25
c)
6.02 x 10^24
d)
6.02 x 10^25
11.
Why is mole concept important?
a)
It can be applied to any type of particle representative.
b)
It gives us a convenient way to express large numbers.
c)
It is useful when converting between grams and atoms or molecules.
d)
All of the above
12.
People usually use hydrogen peroxide (H2O2 Molar Mass = 34 g/mole) to clean their wounds. If Cheska used 1.0 g of H2O2 to clean her wound, how many mole of H2O2 did she use?
a)
0.025 mole
b)
0.029 mole
c)
0.030 mole
d)
0.035 mole
13.
Ethyl butanoate (C3H7COOC2H5, where: C - 12, H - 1 and O - 16) is the substance responsible for the aroma of pineapple. What is the molar mass of ethyl butanoate?
a)
116 g/mole
b)
117 g/mole
c)
118 g/mole
d)
119 g/mole
14.
Which of the following compounds has a lower number of particles?
a)
mole of O2
b)
moles of H2O
15.
Why do you think so? There are ______.
a)
1.204 x 10^23 H2O molecules and 3.01 x 10^24 O2 molecules
b)
1.204 x 10^23 H2O molecules and 3.01 x 10^23 O2 molecules
c)
1.204 x 10^24 H2O molecules and 3.01 x 10^23 O2 molecules
d)
1.204 x 10^24 H2O molecules and 3.01 x 10^24 O2 molecules
16.
What is the representative particle of an element?
a)
atom
b)
ion
c)
molecule
d)
particle unit
17.
What is the mass of moles of Ca (OH)2 (where: Ca - , O - and H - )?
a)
g
b)
g
c)
g
d)
g
18.
Which of the following DOES NOT refer to one mole of carbon dioxide (C - , O - )?
a)
g of C and g of O
b)
g of carbon dioxide
c)
x molecules
d)
mol of C and mol of O
19.
How can the knowledge about the mole be useful for environmentalists?
a)
Mole concept can be used in environmental monitoring.
b)
It gives information on the most dangerous pollutant in the atmosphere.
c)
It gives feedback on the kinds of pollutants present in the atmosphere.
d)
Mole concept can be used in quantifying the amount of pollutant - particles released in the atmosphere.
20.
Mothballs (paradichlorobenzene - C6H4Cl2) are used as a cockroach repellent. If piece of a mothball weighs g and your mother put pieces in your cabinet, how many molecules of paradichlorobenzene - C6H4Cl2 (Molar Mass = g/mol) will be circulating inside your cabinet considering all the mothballs have sublimed?
a)
x molecules of C6H4Cl2
b)
x molecules of C6H4Cl2
c)
x molecules of C6H4Cl2
d)
x molecules of C6H4Cl2
21.
Gold is one of the coinage metals (copper, gold, and silver). How many atoms of gold (Au - ) are in a pure gold nugget having a mass of g?
a)
2mol
b)
4mol
c)
8mol
d)
8mol
22.
Who discovered the MOLE?
a)
Amadeus
b)
Aristotle
c)
Avogadro
d)
Newton
23.
What is a MOLE?
a)
Chemical reaction
b)
Number
c)
Compound
d)
Unit
24.
What is the use of a MOLE?
a)
Dig
b)
Measure
c)
Count
d)
Add
25.
What is the correct value of a MOLE?
a)
6.023
b)
12.04 x10^10
c)
602000000
d)
6.02 x10^23
26.
In one mole of CaCO3 how many formula units of CaCO3 are there?
a)
6.02 x10^23
b)
12.04 x10^23
c)
24.08 x10^23
d)
3.01 x10^23
27.
In one mole of CaCO3 how many Ca2+ ions are there in CaCO3?
a)
12.04 x10^23
b)
6.02 x10^23
c)
24.08 x10^23
d)
3.01 x10^23
28.
In one mole of CaCO3 how many CO3^2- ions are there in CaCO3?
a)
6.02 x10^23
b)
12.04 x10^23
c)
24.08 x10^23
d)
3.01 x10^23
29.
What is the mass of 1 mole of cobalt atoms?
a)
58.9 grams
b)
60 grams
c)
58.9345 grams
d)
57.36 grams
30.
How many atoms of Nitrogen are there in N2 gas?
a)
6.02 x10^23
b)
1.204 x10^24
c)
2.408 x10^24
d)
3.01 x10^23
31.
How many ions of chloride are there in BaCl2?
a)
6.02 x10^23
b)
1.204 x10^24
c)
2.408 x10^24
d)
3.01 x10^23
32.
What is the mass of one mole of CuBr2?
a)
143.45 grams
b)
143 grams
c)
144 grams
d)
143.5 grams
33.
What is the mass of 0.84 mole CuBr2?
a)
120.5 grams
b)
121 grams
c)
120 grams
d)
120.53 grams
34.
If one energy drink contains 0.16 g of caffeine, how many moles of caffeine do we consume when we drink 2 cans? The chemical formula for caffeine is C8H10N4O2.
a)
194.19 moles
b)
0.00107 moles
c)
1213.69 moles
d)
0.00016 moles
35.
Acetone, C3H6O, is the main component of fingernail polish remover. What is the molar mass of acetone to the nearest hundredths place?
a)
58.1 g/mol
b)
58.00 g/mol
c)
58.08 g/mol
d)
59.39 g/mol
36.
Chalk is mostly made of calcium carbonate, CaCO3. If it took 5.2 g of chalk to write your name on the board, how many moles of calcium carbonate does your name contain?
a)
0.05 moles
b)
0.052 moles
c)
0.0406 moles
d)
0.040625 moles
37.
How many atoms of H in the molecule (NH4)2SO4 contains?
a)
2
b)
4
c)
6
d)
8
38.
What is the representative particle of NaHCO3 (baking soda)?
a)
A grain of NaHCO3
b)
An atom of sodium
c)
A molecule of NaHCO3
d)
A molecule of Na2CO3
39.
Which one of the following is untrue about atomic mass?
a)
A relative number
b)
Based on H-1
c)
Used to determine molar mass
d)
Based on carbon-12
40.
What does a molar mass of an element mean?
a)
The atomic mass expressed in amu
b)
The molecular mass
c)
The atomic mass expressed in grams
d)
The atomic mass expressed in kilograms
41.
What is the representative particle for KBr?
a)
Extended lattice
b)
Formula unit
c)
Atom
d)
Molecule
42.
What is molar mass?
a)
One mole of a solution
b)
6.02 x10^23 particles
c)
One mole of representative particles of a substance
d)
One Avogadro’s number of atoms
43.
What is the representative particle for H2?
a)
Atom
b)
Molecule
c)
Formula unit
d)
Ions
44.
What is the SI unit for the amount of substance?
a)
Mole
b)
Gram
c)
Milligram
d)
Microgram
45.
How many honey-buttered chips are there in 4 dozens of honey-buttered chips?
a)
12
b)
24
c)
36
d)
48
46.
What is the molar mass of PtCl6?
a)
405.0 g/mol
b)
407.0 g/mol
c)
407.80 g/mol
d)
408.0 g/mol
47.
How many numbers of particles are there in 24 mol of gold?
a)
1.4x10^25 molecules
b)
1.4x10^25 ions
c)
1.4x10^25 atoms
d)
1.4x10^25 units
48.
How many moles are there in 1.7x10^14 units of LiBr?
a)
2.8 x10^-14 mol
b)
282.39 mol
c)
282 x10^-12 mol
d)
2.82 x10^-14 mol
49.
What is the formula mass of FeO2C6H4?
a)
85 g/mol
b)
163.94 g/mol
c)
163.93 g/mol
d)
164 g/mol
50.
What is the mass of a 1.5 mol S8?
a)
384g
b)
384.78g
c)
385g
d)
387.8g
51.
A flying balloon contains helium gas, which has 32g of helium gas pumped into it. After 3 days, it was found out that the mass of the balloon was reduced to half. How many moles of helium gas escaped to the environment?
a)
2mol
b)
4mol
c)
4mol
d)
8mol
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