Asked by ofjdsh934nvv
1. For which properties can a student design an investigation of the electrostatic forces between molecules in a substance?
A. melting point and boiling point, but not surface tension and vapor pressure
B. surface tension and vapor pressure, but not melting point and boiling point
C. boiling point, but not melting point, surface tension, or vapor pressure
D. melting point, boiling point, surface tension, and vapor pressure
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2. A student decides to conduct an investigation to determine the boiling points of water and ethanol. The student will heat samples of water and ethanol, and measure the temperature at which the samples boil. The student will conduct the investigation three times. Which aspect is missing from the experimental design?
A. determining what data to collect
B. deciding on the number of trials to perform
C. deciding on the appropriate equipment
D. determining the procedure
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3. Why is it important to conduct multiple trials of an investigation to determine the melting point of ice?
A. It lets scientists manipulate data to meet their needs.
B. It ensures that results are accurate.
C. It helps decrease human error.
D. It reduces the materials needed for the investigation.
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4. A student performs four trials of an investigation to determine the boiling point of water. How should the student handle the results?
A. The student should take the average of the minimum and maximum value of the results.
B. The student should use the value that is closest to 100ºC.
C. The student should use the maximum value of the results.
D. The student should take the average of the results from all four trials.
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5. To investigate electrostatic forces between molecules in water and in ethanol, a student pours identical amounts of the liquids into two identical beakers. The student then places objects of different weights in the beakers. Which characteristic is the student most likely testing?
A. melting point
B. boiling point
C. surface tension
D. vapor pressure
A. melting point and boiling point, but not surface tension and vapor pressure
B. surface tension and vapor pressure, but not melting point and boiling point
C. boiling point, but not melting point, surface tension, or vapor pressure
D. melting point, boiling point, surface tension, and vapor pressure
-
2. A student decides to conduct an investigation to determine the boiling points of water and ethanol. The student will heat samples of water and ethanol, and measure the temperature at which the samples boil. The student will conduct the investigation three times. Which aspect is missing from the experimental design?
A. determining what data to collect
B. deciding on the number of trials to perform
C. deciding on the appropriate equipment
D. determining the procedure
-
3. Why is it important to conduct multiple trials of an investigation to determine the melting point of ice?
A. It lets scientists manipulate data to meet their needs.
B. It ensures that results are accurate.
C. It helps decrease human error.
D. It reduces the materials needed for the investigation.
-
4. A student performs four trials of an investigation to determine the boiling point of water. How should the student handle the results?
A. The student should take the average of the minimum and maximum value of the results.
B. The student should use the value that is closest to 100ºC.
C. The student should use the maximum value of the results.
D. The student should take the average of the results from all four trials.
-
5. To investigate electrostatic forces between molecules in water and in ethanol, a student pours identical amounts of the liquids into two identical beakers. The student then places objects of different weights in the beakers. Which characteristic is the student most likely testing?
A. melting point
B. boiling point
C. surface tension
D. vapor pressure
Answers
Answered by
Unknown
1)melting point, boiling point, surface tension, and vapor pressure
2)deciding on the appropriate equipment
3)Mix ice with water until equilibrium is reached but some ice remains that is no longer melting.
4)It ensures that results are accurate.
5)The student should take the average of the results from all four trials.
2)deciding on the appropriate equipment
3)Mix ice with water until equilibrium is reached but some ice remains that is no longer melting.
4)It ensures that results are accurate.
5)The student should take the average of the results from all four trials.
Answered by
p00pyhead
unknown is correct 100%
Answered by
one piece
thanks bro Unknown 100% correct
Answered by
captncrun
5. surface tension.
otherwise, Unknown is correct
otherwise, Unknown is correct
Answered by
Cheddar <3 :)
Unknown is 100% correct
Answered by
wanst me
still correct
Answered by
Nuggie
CaptnCrun I correct as is Unknown. Thank you both!
Answered by
Dinonuggies
Unknown is still 100% correct!!
Answered by
anon
tysm unknown!!
Answered by
Some girl
Thank you !
Answered by
misscat^^
still correct ✅ thanks guys!
Answered by
REX
Unknown
still correct w 100%
still correct w 100%
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