A student compares the boiling point of substances having different intermolecular forces. Which scientific problem is the student most likely investigating? (5 points)
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Is boiling point affected by the strength of particle attraction?
Is boiling point correlated to melting point?
Is boiling point affected by the mass of the sample?
Is boiling point the temperature at which a substance changes its state?
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Question 15 (10 points)

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

- decrease the number of plants and animals living in the water.

solute : a solute is a substance that is dissolved in another substance is known as a solvent. it is mixed with a special mixture know as homogeneous mixture.

solvent: a solvent is a substance that dissolved a solute, which results in a solution is known as solvent.