Direction:
Read the questions carefully and encircle the letter of your chosen
answer.
1. Suppose you
were asked to
prepare a 250-g
chocolate mousse which
is 35% chocolate, 30% cream, 20%
milk, 10% sugar, and 5% butter, how much cream are you going to use?
a. 75 g cream b.
60 g cream
c. 73 g cream d. 62 g cream
2.
Cheska 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 kinds 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.
3.
The following are representative particles of matter: which among them
represents a covalent compound?
a. atom b.
ion
c. molecule d.
particle unit
4.
A bag of NPK fertilizer marked 16-4-8 contains 16% nitrogen, 4% phosphorous and
8% potassium, the
other 72% is
usually inert filler
material, such as
clay pellets or granular limestone. What is the mass of
nitrogen present in 500g pack of NPK fertilizer?
a. 80g b.
40g
c. 20g d.
10g
5. How many particles are equal to 1 mole?
a. 6.02 x 1022 particles
b. 6.02 x 1023particles
c. 6.02 x 1024 particles d.
6.02 x 1025 particles
6. How can the
knowledge about 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 a
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.
7. How can you
apply knowledge on percentage composition?
a.
In maintaining the quality of food product.
b. In checking
the amount of sugar present in the softdrink.
c.
In identifying the correct amount of substance present in a sample.
d.
all of the above
8. How many
percent of hydrogen (H) is present in water (H2O)?
a.
12% b.
11%
c.
13% d.
10%
9. Which of
the following units is used in expressing the amount of substance in terms of the
number of particles?
a.
liter b. gram
c. mole d.
Celcius
10. 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
11. The label
of the dark chocolate indicates that its mass is 150g and it is 70% cacao, if you
consume the whole chocolate bar, how much cacao did you eat?
a.
105 g cacao b. 45 g cacao
c.
100 g cacao d. 50 g cacao
12. What is
the representative particle of ionic compounds?
a.
atom b.
ion
c.
molecule d. formula unit
13. How many
particles are there in one mole of any kind of substance?
a.
3.01 x 1023 b.
6.02 x 1023
c.
3.01 x 1024 d.
6.02 x 1024
14. Moth balls
(paradichlorobenzene-C6H4Cl2) are used
as cockroach repellent. It is often placed
inside the cabinet. If
1 piece of moth ball weighs
5.0g and your mother put 3
pieces in your
cabinet, how many
molecules of paradichlorobenzene-C6H4Cl2 (Molar Mass =
147.00 g/mol) will
be circulating inside
your cabinet considering
all the moth balls have sublimed?
a.
6.02 x 10 22 molecules of C6H4Cl2
b.
6.02 x 10 23molecules of C6H4Cl2
c.
6.14 x 10 22 molecules of C6H4Cl2
d. 6.14 x 10 23
molecules of C6H4Cl2
15. Who among
the following students describes the result of the activity on counting by weighing
correctly?
Ann –Different sets of materials
having the same mass have different number of pieces.
Dan –Different sets of materials
have the same number of pieces and the same mass.
Tom - The same sets of materials, have the same
number of pieces but different masses.
a.
Ann b.
Dan
c.
Tom d.
none of them
16. The
roots of the
plants absorb the
nutrients from the
soil. For the
farmers, it is important to strengthen the root system of
their plants to ensure its growth. Potassium is the mineral responsible
for a healthy root
system. If you
were a farmer,
which of the following fertilizers are you going to
use?
a.
K2SO4 b. K2O
c.
KCl d.
K2CO3
17. Methane
(CH4Molar Mass= 16.04 g/mol)is one of the greenhouse gases. If 32.08 g of CH4 is
released in the atmosphere, how
many molecules of CH 4 are
added in the atmosphere?
a.
1.20 x 1024 b.
1.20 x 1023
c.
6.02 x 1024 d.
6.02 x 1023
18. The
presence of SO2 in
the atmosphere causes
acid rain. How
many percent of sulfur is present in SO2 (Molar
Mass = 64.07g/mole)?
a.
40.00% b. 49.95%
c.
60.00% d. 50.05%
19. Arrange
the following substances from the lightest to the heaviest:
Cl2;
CH4; H2O; NH3; N2
a. H2O<
NH3< N2< CH4< Cl2 b.
CH4< NH3< H2O< N2< Cl2
c. N2<
Cl2< H2O< CH4<NH3 d. NH3<
CH4< Cl2< H2O< N2
20. Why is
mole concept important?
a.
It is useful when converting between grams and atoms or molecules.
b.
It gives us a convenient way to express large numbers
c.
It can be applied to any type of particle representative
d.
All of the above
21. Ammonium
nitrate (NH4NO3
Molar Mass =
80.06g/mole) is a
substance used to produce dinitrogen monoxide (N2O),
a dental anesthetic. Determine the mass percent of N in ammonium nitrate?
a.
35.00% b. 40.65%
c.
39.50% d. 43.68%
22. People
usually use hydrogen peroxide (H2O2 Molar Mass = 34.02
g/mole) to clean their wounds. If Cheska used 1.0 g of H2O2to
clean her wound, how many mole of H2O2 did she use?
a.
0.035 mole b. 0.030 mole
c.
0.029 mole d.
0.025 mole
23. In cold
areas, many fish and insects, including the common housefly produce large amounts
of glycerol (C3H8O3Molar Mass = 92.11 g/mole)
to lower the freezing point of their blood. How many percent of oxygen is
present in glycerol?
a.
52.11% b. 50.11%
c. 51.11% d.
53.11%
24. Ethyl
butanoate (C3H7COOC2H5) is
the substance responsible
for the aroma
of pineapple. What is the molar mass of ethyl butanoate?
a.
118.00 g/mole b. 117.12 g/mole
c.
120.12 g/mole d. 116.18 g/mole
25. Calcium
carbonate (CaCO3
Molar Mass =
100.09 g/mole) is
an antacid used
to neutralize extra acid in the stomach. Lorie is prescribed by the
doctor to take 250mg tablet of CaCO3three times a day. How many moles
of CaCO3 will Lorie consume for 3 days?
a. 0.0252
moles b. 0.0225 moles
c.
0.0242 moles d. 0.0235 moles
ANSWERS KEY:
1. a
2. d
3. c
4. a
5. b
6. d
7. d
8. b
9. c
10. c
11. a
12. d
13. b
14. c
15. a
16. b
17. a
18. d
19. b
20. d
21. a
22. c
23. a
24. d
25. b
ANSWERS KEY:
1. a
2. d
3. c
4. a
5. b
6. d
7. d
8. b
9. c
10. c
11. a
12. d
13. b
14. c
15. a
16. b
17. a
18. d
19. b
20. d
21. a
22. c
23. a
24. d
25. b
Key answer pls..
ReplyDeleteKey answer pls..
ReplyDeleteCan you please show the solution of no.14?
ReplyDeleteplease kindly show the solution of no.14,thanks.
ReplyDelete