How many neutrons are in a 100 mg sample of fluorine gas composed entirely of the most common isotope of fluorine?

Which of the following compounds would be expected to have the largest lattice energy (in terms of the size of the number, ignoring the sign—i.e., in terms of absolute value)?

To prepare a solution that is 1.0% by weight aluminum bromide in methanol (the alcohol of methane, density = 0.8 g/cm3), one should

A spontaneous reaction has a ΔH value of -50.0 kJ at 0 °C. The value of TΔS for this reaction

Liquids with strong intermolecular forces have: (CHOOSE ALL THAT APPLY—on this exam multiple answers are possible for this question and only questions which state that this is so.)

A solid sample is heated until it begins to melt. As it melts, the temperature gradually rises from 800 °C to 900 °C, at which temperature it has completely melted. The sample must be

According to the Bohr model, which electron transition in a hydrogen atom should emit the longest wavelength of light?

Perchloric acid is a stronger acid than chlorous acid because

The arrangement of electrons around the central atom in the carbonate ion consists of

For the exothermic reaction 2NO2 = N2O4 the entropy change for the system is ________, for the surroundings is ________, and for the universe is ________. The entropy change for the ________ must be greater than for the ________.