How many sulfur atoms are there in 25 molecules of C4H4S2?

Which of the following scientists used an alpha particle scattering experiment to prove the existence of a dense, positive nucleus (and disprove the earlier “Plum Pudding” model of the atom)?

My little sister has been locked in the refrigerator since last night at a temperature of -63.0 ºF. What is this temperature in K?

Which of the following gas samples is expected to deviate the least from Ideal Gas behavior?

What are the two thermodynamic driving forces for solubility?

Which of these properties is not characteristic of pure water (H2O)?

Which of the following substances is most likely to dissolve in CH3OH?

A sample of gas originally at 25 ºC and 1.00 atm of pressure in a 2.5 L container is subject to a pressure of 0.85 atm and 15 ºC. What is the final volume of the gas?

Which of the following conditions is required to have a spontaneous, endothermic process?

Which of these pure substances is expected to boil at the lowest temperature?