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Which of the following substances has a standard heat of formation of zero? A. pb @ 1000 degrees C B. C3H8 @ 25.0 C and 1 ATM pressure C. Solid glucose @ room temperature D.N2 @ 25.0 and 1 atm pressure
A 25:75 mixture of acetone:toluene is heated to 70 C at a pressure of 760 mmHg. What is the total vapor pressure of the system? Is the system a liquid below boiling, at boiling, or a gas?
-an experiment was done using NaCl and KCl for solubilty purposes, would the results be different if Nacl and LiCl were used instead?
Important information about Solution Concentrations, Find the concentration of 500mg of alltrans retinol 0.1% per 1 ounce of solution.
Dry air (0% humidity) is approximately 78% N2, 21% O2, and 1% Ar by moles. Calculate the molar mass and density of dry air at 0 °C and 1.0 atm. Assume ideal behavior and use two significant figures in your answers.
what is the relationship between the carbon to nitrogen bond lengths and bond order for HCN molecule
A certain gas has a volume of 200 dm3 at 27oC and 2 atmospheres of pressure. What is its volume at STP?
A 0.120M solution of an enantiometrically pure chiral compound D has an observed +0.18 in a 1-dm sample container. The molar mass of the compound is 136.0g/mol. What is the specific rotation
What is the molecular weight and structure? Also what does this compounds infrared spectrum and NMR spectrum show?
An ionic compound forms when calcium (Z = 20) reacts with iodine (Z = 53). If a sample of the compound contains 1.20 1019 calcium ions, how many iodide ions does it contain?
The temperature dependence of the equilibrium constant is given by the equation: Ln K = Ln A - delta H (standard enthalpy change)/RT. Solve for k (equilibrium constant).
A water sample was taken from a lake. A 100.00mL portion of this sample was pipetted into a 250mL Erlenmeyer flask. EriochromeBlack T-indicator, sodium cyanide, and ammonia buffer
Draw the structure of the one alkene which upon treatment with O2 followed by Zn and acid, would give rise to formaldehyde and cyclohexanone
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