A) For which properties can a student design an investigation of the

Question

A) For which properties can a student design an investigation of the
electrostatic forces between molecules in a substance? (1 point)
melting point and boiling point, but not surface tension and vapor pressure
surface tension and vapor pressure, but not melting point and boiling point
melting point, boiling point, surface tension, and vapor pressure
boiling point, but not melting point, surface tension, or vapor pressure
A) 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? (1 point)
determining what data to collect
deciding on the appropriate equipment
deciding on the number of trials to perform
determining the procedure
12/8/24, 9:33 PM Vega Viewer SPA

Question 3
Question 4
A) Which procedure can be used to determine the melting point of ice?
(1 point)
Warm a beaker of ice on a hot plate until only liquid remains and measure the
temperature of the liquid.
Add ice to liquid water one at a time and measure the temperature of the water
once added ice cubes no longer melt.
Mix ice with water and immediately measure the temperature.
Place a beaker of liquid water in the freezer and measure the temperature after
the water has become solid.
A) Why is it important to conduct multiple trials of an investigation to determine
the melting point of ice? (1 point)
It lets scientists manipulate data to meet their needs.
It helps decrease human error.
It reduces the materials needed for the investigation.
It ensures that results are accurate.
12/8/24, 9:33 PM Vega Viewer SPA

Question 5
A) A student performs four trials of an investigation to determine the boiling
point of water. How should the student handle the results? (1 point)
The student should take the average of the minimum and maximum value of
the results.
The student should use the value that is closest to 100ºC.
The student should use the maximum value of the results.
The student should take the average of the results from all four trials.

GPT-4o mini · Answer

Let's break down each of your questions:

Question 1: Properties for Investigation of Electrostatic Forces The best answer is:

melting point, boiling point, surface tension, and vapor pressure

All these properties can be influenced by electrostatic forces between molecules. Melting point and boiling point are related to the strength of intermolecular forces, and surface tension and vapor pressure are also affected by these forces.

Question 2: Missing Aspect from the Experimental Design The best answer is:

determining the procedure

While the student has planned to heat the samples and measure the temperature at which they boil, the specific steps (procedure) outlining how the heating and measuring will be performed are not mentioned.

Question 3: Procedure to Determine the Melting Point of Ice The best answer is:

Mix ice with water and immediately measure the temperature.

This procedure will reliably give the melting point because it directly relates to the phase transition of ice to water and allows for monitoring of the temperature as the ice melts.

Question 4: Importance of Conducting Multiple Trials The best answer is:

It ensures that results are accurate.

Conducting multiple trials helps to confirm the reliability of the data collected, reducing the impact of random errors or anomalies in a single trial.

Question 5: Handling Results of the Boiling Point Investigation The best answer is:

The student should take the average of the results from all four trials.

Taking the average helps to smooth out any anomalies or inconsistencies in the data collected from individual trials, providing a more reliable measurement of the boiling point.

If you need further clarification on any of the answers, feel free to ask!