Cumulative Exam — Cumulative exam Answers

A chemist dissolved crystals of an unknown substance into water at room temperature. He found that 33 g of the substance can be dissolved into 100 mL of water. What property of the unknown substance was the chemist most likely investigating?

Which energy change best relates to a boulder that is rolling down the side of a hill?

Which method would increase the solubility of a gas?

Consider the equation below.AgNO3(aq) + NaCl(aq) AgCl(s) + NaNO3(aq)Which compound is the precipitate in this chemical reaction?

How can a scientist assess whether a pure niobium (Nb) sample is responsible for contaminating the lab with radioactivity?

Which substance is a strong electrolyte?

Solute crystals are added to a solution until they begin to sink to the bottom of their container. The solution is then heated, and many more solute crystals dissolve. Which term best describes the solution immediately after it was heated?

Which would most likely be the pH of a highly-corrosive acid?

A balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm, what is the new volume of the balloon in the hot room?Use .

Which form of energy is directly related to the measure of the average kinetic energy of the particles in a substance?