1) A team of scientists is working to find the boiling point of a liquid at very low 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 used because it came from three results, not just one.
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.
2) 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 1.5 atmospheres could not be predicted with any certainty at all.
A boiling point at 1.5 atmospheres could be predicted fairly well.
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.
3) 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 actual boiling point is probably between 34°C and 40°C.
The scientists should not report these results until they have the exact number.
The actual boiling point is either 34°C or 40°C.
The scientists do not need to collect more data because they have narrowed down the range of the results.
4) 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 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
by taking 10 measurements of each of the five liquids and finding an average
A student is studying the boiling points of six different liquids and finds results with consistently higher boiling points than what research would suggest. %)
5) Which option describes a likely cause?(1 point)
The thermometer being used might need to be recalibrated.
The experimental setup might be too well insulated, causing higher temperatures.
The amount of liquid being tested might be insufficient.
The heat from the liquids might be escaping too easily.
1.
C.More data should be collected to get a more reliable average.
2.
A. A boiling point at 1.5 atmospheres could be predicted fairly well.
3.
B. checking the calibration of the thermometer to ensure that it is giving accurate readings
4.
B. The actual boiling point is probably between 34°C and 40°C.
5.
C. by taking 10 measurements of each of the five liquids and finding an average
For people who don't have question 3, and different question for number 5, the answer is;
The thermometer being used might need to be recalibrated.
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Chemistry 1 Advanced - Electrical Bonding Investigation: Refining QC. 100% correct as of December 2022.
1: A team of scientists is working to find the boiling point of a liquid at very low 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?
Answer: More data should be collected to get a more reliable average.
2: 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?
Answer: A boiling point at 1.5 atmospheres could be predicted fairly well.
3: 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?
Answer: The actual boiling point is probably between 34°C and 40°C
4: 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?
Answer: By taking 10 measurements of each of the five liquids and finding an average.
5: A student is studying the boiling points of six different liquids and finds results with consistently higher boiling points than what research would suggest. Which option describes a likely cause?
Answer: The thermometer being used might need to be recalibrated.
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answers have shifted so watch for the statements and not the letters. and drake is wrong on number 4
connexus
1) The reasonable conclusion that can be drawn from the additional trial result of 13.1°C is that more data should be collected to get a more reliable average. It is important to gather more data in order to validate the initial average obtained from the three trials. This will help determine if the initial average was accurate or if it needs to be revised based on the new result.
2) Based on the information provided, the reasonable conclusion is that a boiling point at 1.5 atmospheres could be predicted fairly well. The fact that there is a nearly constant increase in boiling point for each increase in pressure indicates a predictable pattern. This suggests that the relationship between pressure and boiling point is consistent, allowing for a relatively accurate prediction of the boiling point at other pressures within the tested range.
3) From the result of 37+/-3°C, the reasonable conclusion is that the actual boiling point is probably between 34°C and 40°C. The range of 37+/-3°C indicates the uncertainty in the measurement, suggesting that the true boiling point lies within this range. It is unlikely that the boiling point is exactly 34°C or 40°C, as the result has a degree of uncertainty.
4) In order to make the best use of the laboratory testing time, the team can take 10 measurements of each of the five liquids and find an average. By taking multiple measurements for each liquid and calculating the average value, the team can obtain a more accurate representation of the boiling point for each substance. This approach allows for a thorough understanding of the effects of molecular weight on boiling point without sacrificing the quality of the data obtained.
5) A likely cause for consistently higher boiling points than expected could be that the thermometer being used might need to be recalibrated. If the thermometer is not accurately measuring the temperature, it can result in higher readings, leading to a misinterpretation of the boiling points. Recalibrating the thermometer can help ensure accurate temperature measurements and provide more reliable results.