Convert 1255 mm Hg to atm

Which substance in the liquid state has only dipole-dipole and hydrogen bonding?

Answer the following question. Show the answer on the screen provided. After uploading your exam, take the picture of your work and upload it to Exam 4 Solutions, Extra Credit, and Partial Credit assignment. Your work must reflect the answer provided here. NO CREDIT will be awarded for the answer without work shown. A 15.00 g sample of CaO is dissolved in water in a calorimeter with a heat capacity of 4.37 kJ/oK. The temperature decreases by 4.05oK.  Calculate ΔHrxn  in kJ/mol for the reaction CaO(s) + H2O(l) => Ca(OH)2(s)  

The following can be used to measure the heat of combustion for an unknown sample?

A  75.0 L balloon contains 215.18 g of neon at 27oC. Calculate the pressure in atm,  in the ballon.

An _____ reaction results when the energy released by the formation of products is greater than the energy required to break the bonds in the reactants.

If 0.500  mol of hydrogen gas completely reacted with 0.5000 mol of bromine gas at constant pressure, releasing 46.25 kJ of heat, which of the following thermochemical equations is correct?

If 9.00  mol of hydrogen gas completely reacted with 3.000 mol of nitrogen gas at constant pressure, releasing 277 kJ of heat, which of the following thermochemical equations is correct?

A 30.0 L cylinder contains 122.0 g of oxygen gas at 25oC. What is the pressure of the gas in torr?

A 0.213 g sample of an organic compound with a molar mass of 386.0 g/mol was burned in the bomb calorimeter with a heat capacity of 2.54 kJ/K. The temperature in the calorimeter increased by 4.12 K. Calculate the energy of combustion of the compound in kJ/mol.