1. Intro to General Chemistry

Which of the following substances would be the best electrical insulator?

Which of the following is a reason chemical sterilization might be used instead of autoclaving?

Which of the following occurs in all chemical changes?

Which statement best illustrates the difference between a chemical reaction and a nuclear reaction?

Which of the following is an example of a chemical reaction?

Which of the following is an indicator that a chemical reaction has occurred?

Which of the following gases is the most abundant in Earth's atmosphere?

Which of the following compounds is the most stable?

Which of the following is a chemical property of a substance?

Which of the following best describes a chemical reaction?

At a pressure of 18.1 inches Hg vacuum, what is the saturation temperature of R-123?

The 'elephant toothpaste' demonstration involves the rapid decomposition of hydrogen peroxide, producing foam. Is this process an example of a physical change or a chemical reaction?

What is the primary reason that NH_3(aq) is added to the dissolved penny solution in this experiment?

Which of the following must occur when a substance undergoes a chemical change?

Increased ozone in the lower atmosphere (near the ground) results primarily from: