Mathematical manipulations including SI units, scientific notation, linear equations, graphing, ratio and proportion, significant digits, and dimensional analysis.
Use of appropriate technology including computers, graphing calculators, and probeware, for gathering data, communicating results, and using simulations to model concepts.
Accurate recording, organization, and analysis of data through repeated trials.
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Q 1/25
Score 0
What would be the best to measure 12.6 ml of liquid ethanol?
30
25 mL graduated cylinder
25 mL Beaker
25 mL Volumetric Flask
25 mL Erlenmeyer flask
Q 2/25
Score 0
A compound has a mass of 2.6632 x 10^2 g/mol. The number of significant figures in this mass is -
30
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4
2
7
25 questions
Q.
What would be the best to measure 12.6 ml of liquid ethanol?
1
30 sec
CH.1.b
Q.
A compound has a mass of 2.6632 x 10^2 g/mol. The number of significant figures in this mass is -
2
30 sec
CH.1.g
Q.
What is the volume of the water in this graduated cylinder
3
30 sec
CH.1.b
Q.
If a sample has a mass of 1.25 x10^2 g and a volume of 51 mL, what is its density?
4
30 sec
CH.1.g
Q.
A bottle of chemical Q spills on the floor. According to the MSDS, what is the proper response to this accident?
5
30 sec
CH.1.c
Q.
What is the best use for the fume hood?
6
30 sec
CH.1.b
Q.
Students want to separate and compare the components of black ink and green ink. Which technique is best for the students to use?
7
30 sec
CH.1.a
Q.
Which of these best describes the basis on which new scientific ideas are accepted or rejected?
8
30 sec
CH.1.i
Q.
A student determined that the density of a sample of tin is 8.00 g/mL, when the actual density of tin is 7.28 g/mL. What was the percent error in the student's calculation?
9
30 sec
CH.1.f
Q.
A student performed a series of titirations to find the concentration of an unknown acid. The results of the titrations are shown in the data table. What is the mean of this set of data?
10
30 sec
CH.1.d
Q.
The picture shows a filtration process. Which of these is least likely to pass into the test tube?
11
30 sec
CH.1.a
Q.
After 1911, most scientist accepted the theory that the nucleus of an atom was very dense and very small and had a positive charge. What led scientists to accept this theory?
12
30 sec
CH.1.i
Q.
A student is given a container of potassium nitrate crystals. In order to determine the exact mass of the potassium nitrate using a triple beam balance, he must know the -
13
30 sec
CH.1.a
Q.
What is the independent variable in the study?
14
30 sec
CH.1.g
Q.
To determine if a reaction is exothermic, a student should use a -
15
30 sec
CH.1.h
Q.
A student hypothesizes that the solubility of a particular solute in water is nearly constant as temperature varies. The student can best test the hypothesis by doing which of the following?
16
30 sec
CH.1.e
Q.
The table shows the measurements of the volume and the pressure of a portion of a gas at constant temperature. After graphing, the date reveals that the volume is -
17
30 sec
CH.1.g
Q.
The accepted value for the specific heat of aluminium is 0.897 J/gC. Which of the following sets of specific heat values for aluminum, calculated from a prior experiment, has the greatest accuracy and precision?
18
30 sec
CH.1.d
Q.
Four students each took three temperature readings of a sample of water. The actual temperature of the sample was 80.0 C. Which student's measurements were both accurate and precise?
19
30 sec
CH.1.d
Q.
Which of these is the proper method for using a thermometer to measure the temperature of liquid in a beaker?
20
30 sec
CH.1.b
Q.
Sulfuric acid (H2SO4) is spilled on a laboratory bench. Which chemical would be useful for neutralizing the acid?
21
30 sec
CH.1.c
Q.
The graph shows five data points collected in an investigation of the relationship between the concentration of alcohol dissolved in water and its density. The relationship was expected to be linear. Which of the data points most likely resulted from an error in procedure?
22
30 sec
CH.1.g
Q.
Which is the safest practice when heating the contents of a test tube over a flame?
23
30 sec
CH.1.b
Q.
The proper scientific notation for 565,000,000,000 is -
24
30 sec
CH.1.g
Q.
Which of these is the percent of error in evaluating the molecular mass of a compound if the experimental was 105.2 amu and the known value was 107.5 amu?
