Question 1 (5 points)
10.02
(10.02_Q1) In Experiment 1, the density of pure ethanol was found to be:
Question 1 options:
less than 0.793 g/mL.
0.793 g/mL.
0.999 g/mL.
greater than 0.999 g/mL.
Question 2 (5 points)
(10.02_Q2) Based on the results of Experiments 1−3, the density of PA-11 is most likely:
Question 2 options:
less than 0.793 g/mL.
between 0.853 g/mL and 0.958 g/mL.
between 0.999 g/mL and 1.05 g/mL.
greater than 1.11 g/mL.
Question 3 (5 points)
(10.02_Q3) Suppose that a sixth KI/H2O solution had been measured in Experiment 2 and the mass of the solution in the graduated cylinder was 67.54 g. The density of this solution would most likely have been closest to which of the following?
Question 3 options:
1.25 g/mL
1.30 g/mL
1.35 g/mL
1.40 g/mL
Question 4 (5 points)
(10.02_Q4) A plastic bead was tested as in Experiment 3 using Liquids 1−4. Which of the following is NOT a plausible set of results for the plastic?
Question 4 options:
R R R R
R R S S
S S R R
S S S S
Question 5 (5 points)
(10.02_Q5) In Experiments 1 and 2, the students tared the graduated cylinder in each trial so they could more easily determine:
Question 5 options:
the mass of the substances added to the graduated cylinder.
the density of the graduated cylinder.
when the total volume of the added substances was equal to 50.0 mL.
when all of the KI was dissolved in the H2O.
Question 6 (5 points)
(10.02_Q6) A student claimed that polycarbonate is more dense than PA-6. Do the results of Experiments 1-3 support his claim?
Question 6 options:
No, because in Liquid 8, polycarbonate stayed at the bottom and PA-6 rose.
Yes, because in Liquid 8, polycarbonate stayed at the bottom and PA-6 rose.
No, because in Liquid 8, polycarbonate rose and PA-6 stayed at the bottom.
Yes, because in Liquid 8, polycarbonate rose and PA-6 stayed at the bottom.
Question 7 (5 points)
10.02_Q7
(10.02_Q7) What % of an object’s mass is below the water line if the object’s density is 0.63g/ml?
Question 7 options:
50%
63%
73%
82%
Question 8 (5 points)
(10.02_Q8) What % of an object’s mass is above the water line if the object’s density is 0.82g/ml?
Question 8 options:
82%
73%
25%
18%
Question 9 (5 points)
10.02_Q9
(10.02_Q9) What is the density of the oak block? (feedback provided on this question in the graded quiz view)
Question 9 options:
2.77 g/cm3
0.75 g/cm3
0.75 lb./gal
1.34 g/cm3
Question 10 (5 points)
(10.02_Q10) What is the density of the Ice block
Question 10 options:
0.92 g/cm3
0.92 lb./gal
1.1 g/cm3
0.75 g/cm3
Question 11 (5 points)
(10.02_Q11) What is the density of the Teak Wood
Question 11 options:
0.99 g/cm3
1.01 lb./gal
1.01 g/cm3
0.92 g/cm3
Question 12 (5 points)
(10.02_Q12) What is the density of the Bamboo?
Question 12 options:
0.35 lb./gal
0.35 g/cm3
2.86 g/cm3
1.01 g/cm3
Question 13 (5 points)
(10.02_Q13) What is the percentage of the Oak underwater?
Question 13 options:
35%
92%
75%
100%
Question 14 (5 points)
(10.02_Q14) What is the percentage of the ice underwater?
Question 14 options:
35%
92%
75%
100%
Question 15 (5 points)
(10.02_Q15) What is the percentage of the Teak wood underwater?
Question 15 options:
35%
92%
75%
100%
Question 16 (5 points)
(10.02_Q16) What is the percentage of the Bamboo underwater?
Question 16 options:
35%
92%
75%
100%
Question 17 (5 points)
(10.02_Q17) Do all types of wood float?
Question 17 options:
Yes
No
Question 18 (5 points)
(10.02_Q18) Is there a good correlation between the density of an object and how well it floats?
Question 18 options:
Yes
No
