CHM 113 ACTUAL EXAM PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Characterize each of the following using as many of the words from
question 1 as applicable: Ne, O2, NO2, air (consists of N2, O2, and a
few other types of matter), salt water (NaCl and H2O). Answer: Ne:
atom, element, pure substance
O2: molecule, element, pure substance
NO2: molecule, compound, pure substance
Air: homogenous mixture
Salt water: homogenous mixture
◉ Characterize each of the following as a physical property or chemical
property: Answer: boiling point (physical)
tendency to rust (chemical)
density (physical)
luster (physical)
reactivity with acid (chemical)
◉ Characterize each of the following as an intensive property or an
extensive property: Answer: heat content (extensive)
reactivity with oxygen (intensive)
, mass (extensive)
volume (extensive)
density (intensive)
odor (intensive)
melting point (intensive)
◉ Circle the correct answer in each case: I am making a candle. I start
by melting some white wax in a pot. This is a (physical / chemical)
change. I then add some red food coloring and stir. I have made a(n)
(element / compound / homogenous mixture / heterogeneous mixture).
Next, I add some rose petals and stir. I have made a(n) (element /
compound / homogenous mixture / heterogeneous mixture). I then allow
the wax to cool and solidify. This is a (physical / chemical) change. The
wax solidifies at 30 C, which is an example of a (physical / chemical)
property and a(n) (intensive / extensive) property. I light the candle and
watch it react with oxygen. As the candle burns, I am observing a
(physical / chemical) change. Answer: Physical/homogenous
mixture/heterogeneous mixture/physical/(physical /intensive/chemical
◉ Convert:
567 g to mg Answer: 567000 mg or 5.67 x 105 mg
◉ 6.73 x 103 s to ms Answer: 6730000 ms or 6.73 x 106 ms
◉ 5.7 L to mL Answer: 5700 mL or 5.7 x 103 mL
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Characterize each of the following using as many of the words from
question 1 as applicable: Ne, O2, NO2, air (consists of N2, O2, and a
few other types of matter), salt water (NaCl and H2O). Answer: Ne:
atom, element, pure substance
O2: molecule, element, pure substance
NO2: molecule, compound, pure substance
Air: homogenous mixture
Salt water: homogenous mixture
◉ Characterize each of the following as a physical property or chemical
property: Answer: boiling point (physical)
tendency to rust (chemical)
density (physical)
luster (physical)
reactivity with acid (chemical)
◉ Characterize each of the following as an intensive property or an
extensive property: Answer: heat content (extensive)
reactivity with oxygen (intensive)
, mass (extensive)
volume (extensive)
density (intensive)
odor (intensive)
melting point (intensive)
◉ Circle the correct answer in each case: I am making a candle. I start
by melting some white wax in a pot. This is a (physical / chemical)
change. I then add some red food coloring and stir. I have made a(n)
(element / compound / homogenous mixture / heterogeneous mixture).
Next, I add some rose petals and stir. I have made a(n) (element /
compound / homogenous mixture / heterogeneous mixture). I then allow
the wax to cool and solidify. This is a (physical / chemical) change. The
wax solidifies at 30 C, which is an example of a (physical / chemical)
property and a(n) (intensive / extensive) property. I light the candle and
watch it react with oxygen. As the candle burns, I am observing a
(physical / chemical) change. Answer: Physical/homogenous
mixture/heterogeneous mixture/physical/(physical /intensive/chemical
◉ Convert:
567 g to mg Answer: 567000 mg or 5.67 x 105 mg
◉ 6.73 x 103 s to ms Answer: 6730000 ms or 6.73 x 106 ms
◉ 5.7 L to mL Answer: 5700 mL or 5.7 x 103 mL
