Is condensation of ethanol a physical change or a chemical change

If a multiple choice question has five choices and you submit one wrong answer before getting the question correct, how much credit will you lose for that part of the question?

Suppose you are performing a titration of a weak acid. Which of the following indicators would be the best choice for visualizing the titration? Group of answer choices methyl red phenolphthalein crystal violet bromocresol green

A total of 25.6 kj of hear energy is added to a 5.18l sample of helium at. 987atm The gas is allowed to expand against a fixed external pressure to a volume of 18.4l

What is the relative acidity of tomato juice (pH 4) and milk (pH 6) ?

A solution is spilled on the lab bench. It touches litmus paper and the paper turns blue. What should you use to neutralize this solution?

If 5.0mL of HC2H30 require 4.96mL of 0.9581 M NaOH to just consume the HC2H302, what is the concentration of the HC2H3O2? If necessary, show the calculation on a separate sheet of paper, scan, and submit with your lab report.

How many formula units of CaSO4 are in 17g of CaSO4?

Which of these would be an appropriate way to describe the concentration of orange candies? Check all that apply the number of orange candies divided by total number of candies the mass of orange candies divided by total mass of candies the volume

A 8.00 L tank at 26.9 C is filled with 5.53 g of dinitrogen difluoride gas and 17.3 g of sulfur hexafluoride gas. You can assume both gases behave as ideal gases under these conditions.

What type of wave is sound? a. gamma b. pressure c. electromagnetic d. light