Which of the following is most likely to be a solid at room temperature?

A solid crystal of NaCl is

You have a 10.40-g mixture of table sugar (C12H22O11) and table salt (NaCl). When this mixture is dissolved in 150. g of water, the freezing point is found to be –2.24°C. Calculate the percent by mass of sugar in the original mixture.

Why might fairness become a problem with future enhancement methods?

How many milliliters of 15.7 M H2SO4 are needed to prepare 600.0 mL of 0.10 M H2SO4?

Free Response #1   Version B   Please circle 1B on the sheet and show your work for for full credit.   When 0.715 g of NH4NO3 was added to 135.0 g of water in a Styrofoam cup, the temperature dropped by 0.492°C. The heat capacity of H2O is 4.18 J/g°C. Assume the specific heat of the solution equals that of pure H2O and that the calorimeter neither absorbs nor leaks heat. The molar heat of solution of solid NH4NO3 is:

Which statement from the article is an opinion rather than a fact?

When a 49.1-g sample of an unknown compound is dissolved in 500.g of benzene, the freezing point of the resulting solution is 3.77°C. The freezing point of pure benzene is 5.48°C and Kf for benzene is 5.12°C/m. Calculate the molar mass of the unknown compound.

The process of condensation happens when which of the following occurs?

If 2.00 g of helium gas and 3.82 g of oxygen gas are mixed together, what is the mole fraction of helium in the solution?