Vapor pressure

The vapor pressure of water at 22 degrees C is 19.800 torr. If you put 26.662 g of water in a cubic container that is 1.1000 m on an edge, will there be any liquid water remaining in the container at 22 degrees C or will it all be vapor? R = 0.0820578 L*atm/K*mol.

Standard heat of fusion

If you want to convert 56.0 g of ice (at 0 degrees C) to water at 75 degrees C, how much propane (CH3-CH2-CH3) would have to burn in order to supply the heat (at constant pressure) to melt the ice and then warm it to the final temperature. Change in standard Heat of fusion = 6.009 kJ/mol and the molar heat capacity of water is 7 ...continues

Different melting points of NaF and MgO

The ions of NaF and MgO are isoelectronic, and the intermolecular distances are about the same (235 pm and 212 pm, respectively). Why then are the melting points of NaF and MgO so different (992 degrees C and 2643 degrees C, respectively)?

Pi and Sigma bonds

Why or why isn't it possible to have pi bonds between two atoms without there being a sigma bond?

Liquifying a compound?

The simple hydrocarbon methane (CH4) cannot be liquefied at room temperature, no matter how high the pressure. Propane (C3H8), another compound in the series of hydrocarbons, has a critical pressure or 42 atm and a critical temperature of 96.8 degrees C. Can this compound be liquefied at room temperature?

Don't know how to set up the problem

How many moles of PbSO4 will be formed when 0.55 moles of Al4(SO4)3 is used in the following equation? PbCl2 + Al2(SO4)3 arrow PbSO4 + AlCl3

Chemistry - aluminum

A piece of aluminum with a mass of 234 grams is heated to a temperature of 231 degrees Celcius and then is dropped into 123 mL of 21 degrees celcius water. If no energy is lost to the surroundings, what will be the maximum temperature reached by the water?

Number of Moles

Part A: If we start with 0.500 moles of H2 (subscript) and 0.500 moles of I2 (subscript) in a 5.25 L reaction vessel at 698 K, how many moles of each of the three gases will be present at equilibrium? Equation: H2(subscript) + I2(subscript) <--> 2HI KEQ= 54.3 at 698 K Part B: The same set up as part A, but this time ...continues

Chemistry Problems

1. The following reaction occurs: CaCO3 + 2H- -> Ca2+ + CO2 +H2O If a 25gm sample of calcium carbonate is added to a 75.5 ml HCl (density = 1.125gm/cm3, 26% HCl by mass), calculate the molarity of the HCL remaining in solution (if any) after the reaction is complete. Assume no volume change. 2. A sample of coc ...continues

Chemistry Quiz on enthalpy, intermolecular forces, paramagnetism, coulomb, partial pressure. Answer Grid is provided.

I am preparing for exams and multiple choice questions help me learn the material. can you provide me with a multiple choice test with the answers provided enthalpy, intermolecular forces, paramagnetism, coulomb, partial pressure, and the likes. Thanks. CHEMISTRY QUIZ: 1) An unstable nucleus will ... (a) dissolve ...continues