How many kilojoules of heat are needed to completely vaporize 42.8 g C4H10O at its boiling point? Given that ΔHvap = 26.5 kJ/mol

Match each solid with its classification.

Which one of the following species has the electron configuration of 1s22s22p6? 1.   Na+ 2.   O2- 3.   F-

Which Lewis structure below correctly represents the compound formed between potassium and chlorine?

Increasing the intermolecular forces of a liquid will do which of the following?

A balloon filled with 0.500 L of air at sea level at 1 atmosphere is submerged in the water to a depth that produces a pressure of 3.25 atm. What is the volume of the balloon at this depth?

The Lewis structure below best represents what formula?  [:-=] 

Hydrogen gas produced in the laboratory by the reaction of magnesium and hydrochloric acid was collected over water at 25°C. The atmospheric pressure at the time was 742.5 mm Hg. What is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 23.8 mm Hg?

Melting point can be defined as the temperature when a solid becomes a liquid. The melting point of the chemical acetone is -95°C. Which state of matter would you expect to exist for acetone at a temperature of -94°C?

What are the coefficients for the following reaction when it is properly balanced?___O2 + ___CH4 → ___CO2 + ___H2O