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In 1782, Jacques Charles used a hydrogen-filled balloon to fly from Paris 25 km into the french countryside. What is the mass density of hydrogen relative to air at the same temperature and pressure? What mass of payload can be lifted by 10 kg of hydrogen, neglecting the mass of the balloon?
Calculate the pH of a buffer tht contains 0.60M ammonium chloride
Kc for the reaction below at 25°C is 4.8 x 10-6. Calculate the equilibrium concentration (mol/L) of Cl2(g) if the initial concentration of ICl(g) is 1.33 mol/L. There is no I2 or Cl2 initially present.
Calculate the amount of heat liberated (in kJ) from 417 g of mercury when it cools from 64.0°C to 12.0°C.
Calculate the transformation rate for the austenite-to-pearlite transformation at 650 °C and at 600 °C. Show the relationship(s) you used to arrive at your answers.
Draw the accepted mechanism for each reaction and illustrate how each stereoisomer is formed in the reaction.
The half-life for the first-order reacion of HCl with ethylene is 15.4 s when the initial concentration of HCl is 0.67 M. What is the rate constant for this reaction?
A 250.0 ml sample of gaseous hydrogen bromide, measured at 22.9 C and 0.930 atm, was dissolved in sufficient pure water to form 250.0 ml of solution. What was the pH of that solution.
The reaction of 2,2-dimethyl-1-propanol with HBr is very slow and gives 2-bromo-2-methyl-propane as the major product. Give a mechanistic explanation for these observations
Which statement(s) is(are) true about X which has a molecular ion peak in its mass spectrum at mass 164?
Determine the molar mass of the compound if boiling point constant for CCl 4 =4.95 K · kg/mol.?
What information is gained from VSEPR analysis? What is Valence Bond Theory?
How would you experimentally demonstrate whether the newly entering acetyl group from the breakdown of glucose is or is not the carbon oxidized in the citric acid cycle? Show your work and draw out experiment.
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