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When 1 mole of H2 gas reacts with 1 mole of F2 gas, 2 moles of HF gas are produced and 536 kJ of energy is released. Is this an endo or exothermic reaction? Write a thermochemical equation for this reaction.
Calculate the pH at the equivalence point in titrating 0.047 M solutions of each of the following with 0.011 M NaOH. (a) periodic acid (HIO4) pH = (b) benzoic acid (HC7H5O2), Ka = 6.3e-05 pH = (c) carbonic acid (H2CO3), Ka = 4.3e-07 pH =
Water with an alkalinity of 2.00 X 10^-3 equivalents/L has a pH of 7.00. Calculate [CO2], [HCO3-], [CO3^2-], and [OH-].
Determine the change in Ssys for the process if specific heat capacity for ethanol = 2.42 J/g K. express your answer in units of J/K
Ethyl alcohol, C2H5OH, is a fermentation produce of sugars in the presence of enzymes. How much glucose, C6H12O6, would you need to start with to prepare 4.6 x 104 kg of ethyl alcohol
consider radiation of wavelength of 8000 Angestroms, at a temprature of 1000 K. using a planck law, calculate the energy per unit volume
The rate constant of a reaction is 7.4 x 10^-3 s-1 at 25 Celsius, and the activation energy is 33.6 kJ/mol. What is k at 75 Celsius?
Determine whether a solid forms when solutions containing the following salts are mixed. If so, write the ionic equation and the net ionic equation. NaF and AgNO3 . Write the ionic equation.
laser beam to read the digital video data off a DVD disk. What is the frequency of this red colored visible light?
doctors commonly used a syringe for drawing blood this syringe commonly has an opening with a 0.514mm of diameter.
What mass of O2 is required for the complete combustion of 68.9 g of pentane, C5H12, to CO2 and H2O?
a graduated cylinder contains 110. ml of water. a 10.0 g piece of iron density 7.86 gcm3 and a 18.9 g piece of lead
The mole fraction of O2 in the air is 0.2094, and the mole fraction of N2 is 0.7809. Calculate the density of air at 25 degree celcius and the pressure is 1.00 atm.
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