A sample of substance X is initially held at 90°C and 1.9 atm pressure, then the pressure is decreased by 1.3 atm. Which of the following is an accurate description of the physical processes which take place?

The graph below shows how the vapor pressure of three liquids varies with temperature. Which liquid is the most volatile?

Which of the following would experience dipole-dipole interactions between molecules of the compound?

A metal crystallizes in a face centered cubic lattice with lattice constant = 410 pm. What is the atomic radius of the metal atom?

Which of the following molecules would you expect to have the highest boiling point?

Which of the following would you expect to form hydrogen bonding interactions between molecules of the compound?

A molecular compound has a solubility in acetonitrile of 60.1 g/L at 10°C. What mass of the compound is required to prepare 250. mL of a saturated solution of the molecular compound in acetonitrile at this temperature?

The graph below shows how the vapor pressure of three liquids varies with temperature. What is the normal boiling point of benzene?

A solution is made by mixing 131 g of heptane (C7H16; molar mass = 100.1926 g/mol) and 134 g of acetyl bromide (CH3COBr; molar mass = 122.946 g/mol). What is the mole fraction of heptane in this mixture?

A solid sample of substance Y is heated at a steady rate and the temperature is recorded as the flask is heated. What is the melting point of substance Y?