A) A team of scientists is working to find the boiling point of a liquid at very low

Question

pressure. After three trials, the team has an average of 12.3ºC. An additional
trial gives a result of 13.1°C. Which statement is a reasonable conclusion that
can be drawn from this result? (1 point)
The original average should be thrown out because it could not be confirmed
by new results.
More data should be collected because the first three trials appear to be
wrong.
More data should be collected to get a more reliable average.
The original average should be used because it came from three results, not
just one.
12/18/24, 5:57 PM Vega Viewer SPA

Question 2
A) The boiling point of a liquid is tested at 10 different pressures, from 0.5 to
1.4 atmospheres. The results of the tests show that there is a nearly constant
increase in boiling point for each increase in pressure. Which conclusion is
reasonable based on this information? (1 point)
A boiling point at 15 atmospheres could not be predicted with any certainty at
all.
A boiling point at 15 atmospheres could be predicted fairly well.
A boiling point at 1.5 atmospheres could not be predicted with any certainty at
all.
A boiling point at 1.5 atmospheres could be predicted fairly well.
12/18/24, 5:57 PM Vega Viewer SPA

Question 3
A) A team of scientists is conducting tests to measure the boiling point of a
liquid using a thermometer in the liquid. The team is then recording the
temperature where the liquid changes from a liquid to a gas rapidly. After 100
trials, the results are 5 degrees below the expected results. Which next step is
most reasonable? (1 point)
checking the insulation of the apparatus to find out if heat is escaping
assuming that the previous measurements are incorrect
assuming that the new results are incorrect
checking the calibration of the thermometer to ensure that it is giving accurate
readings
12/18/24, 5:57 PM Vega Viewer SPA

Question 4
A) The boiling point of a substance is tested. After 10 tests, the result is given
as 37+ / − 3°C. Which conclusion can be drawn from this result? (1 point)
The scientists do not need to collect more data because they have narrowed
down the range of the results.
The actual boiling point is probably between 34°C and 40°C.
The actual boiling point is either 34°C or 40°C.
The scientists should not report these results until they have the exact
number.
12/18/24, 5:57 PM Vega Viewer SPA

Question 5
A) A team wants to understand the effects of molecular weight on boiling point.
The team has access to five substances with different molecular weights and
the time to measure 50 boiling points. How can the team make the best use of
the laboratory testing time? (1 point)
by taking 10 measurements of each of the five liquids and finding an average
by taking one measurement of each liquid and then working to improve the
least certain liquid in the group
by taking 10 measurements of each of the five liquids and using the highest
value from each set
by taking measurements of the liquids one at a time, making sure that the
correct results are achieved before moving on to another liquid

Answer 1

Here are the most reasonable conclusions for each question based on the information provided:

Question 1: More data should be collected to get a more reliable average.
Rationale: The additional trial provides a new data point that is different from the average of the first three trials. Collecting more data will help to better establish a reliable average.

Question 2: A boiling point at 1.5 atmospheres could be predicted fairly well.
Rationale: Since the tests show a nearly constant increase in boiling point with each increase in pressure, it suggests a predictable relationship. Thus, extrapolating to slightly above the maximum tested pressure of 1.4 atmospheres is reasonable.

Question 3: Checking the calibration of the thermometer to ensure that it is giving accurate readings.
Rationale: Since the results are consistently 5 degrees below the expected values, it is essential to investigate the accuracy of the measuring instrument (the thermometer) before concluding anything about the boiling point itself.

Question 4: The actual boiling point is probably between 34°C and 40°C.
Rationale: The report of the boiling point as 37° ± 3°C indicates that the results suggest a range of possible values that the actual boiling point could fall within.

Question 5: By taking 10 measurements of each of the five liquids and finding an average.
Rationale: This method ensures that the team has a representative data set for each substance, allowing for better analysis of the relationship between molecular weight and boiling point. Averaging multiple measurements will help to minimize random error and improve reliability.