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2 liquids, A and B, have the same molecular weight. Samples of each are placed on temperature probes and allowed to evaporate. After a period of time Liquid A had a change in temp. of 10.2 C while liquid B had a change in temp. of 3.7 C. Now, which of the two liquids required more energy to overcome intermolecular attraction and evaporate?
A chemist produces 460 mL of oxygen gas at - 43 °C and constant pressure. To what Celsius temperature must the oxygen be warmed in order for it to have a volume of 600 mL?
Determine the final concentration if a 144-mL portion of that solution is diluted using water of 143 mL ?
what is the percent relative error? Please explain by showing work. Are these measurements more precise or more accurate? What is the purpose of repetition in measurements?
Determine the shape (geometry) of PCl3 and then decide on the appropriate hybridization of phosphorus in this molecule
Calculate the change in its standard molar Gibbs free energy when benzene is heated from 25 ºC to 45 ºC.
Explain why and calculate the difference between the delta S° values at 298 K for the complete dissociation of the two complex ions. (Hint: the value delta H is about the same for both systems.)
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.
The Ksp for Al(OH)3 is 2 x 10-32. At what pH will a 0.2 M Al3+ solution begin to show precipitation of Al(OH)3.
The reactant concentration in a first-order reaction was 6.80×10-2 M after 10.0 s and 4.40×10-3 M after 65.0s . What is the rate constant for this reaction?
Calculate the mass of ethylene glycol required to lower the freezing point of 200 mL of water/ice by 4.5 degrees celsius. The K(f) for H20 is 1.86 degrees celsius/m. Assume the density of water is 1.00 g/ml.
When aminobenzene is subjected to standard nitration conditions {HONO2/(HO)2SO2} poor yields 1-amino-3 itrobenzene are obtained.
What volume (in mL) of a 1.420M NaOH solution is required to titrate 25.0mL of 4.50M HCl solution.
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