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A solution of 75.0 g of benzene (C6H6) and 75.0 g of toluene (C7H8) has a total vapor pressure of 80.9 mmHg at 303 K. Another solution of 100.0 g benzene and 50.0 g toluene has a total vapor pressure of 93.9 mmHg at this temperature.
The element is so highly unstable that no observations of its properties have been possible. Based on its position in the periodic table, propose two different reasonable valence electron configurations for this element.
Calculate the composition of air (percent by mass) assuming that it only contains nitrogen and oxygen and behaves like an ideal gas
Create an outline of no more than 10 steps describing how you will regenerate the column, load your sample and collect the hydronium ion released.
Give the balanced total and net ionic equations and predict whether a reaction occurs. indicate whether the reactions are precipitation reactions or acid-base reactions.
How would you prepare 1.0 ml of a 0.6 mg/ml protein sample from a 1.0 mg/ml protein stock solution in a given phosphate buffer? b) 1 ml of water and 1.0 ml of a solution "x" mixed together is a 1:2 dilution of "x" in water.
Determine what given process is occurring when the color appears in the flame and an electron emits energy and it makes a transition to a higher energy orbital.
Calculate the change in enthalpy of Hydrogenation from 298 K to 398 K. The Cp values are C2H4: 43.6 J/K mol and C2H6: 52.7 J/K mol
charcoal is primarily carbon. determine the mass of CO2 produced by burning enough carbon to produce 5.00 X 10^2 KJ of heat.
Compute delta Hf for CaC2 : CaC2 + 2H2O-->Ca(OH)2 +C2H2 From the given enthalpy of reaction data as water(H2O) =(2*-285.83),calcium hydroxide Ca(OH)2=(-986.2) , AcetyleneC2H2 =(226.77)?
A shiny piece of metal is beleved to be either platinum or nickel. if the price has a mass of 156.485g and a volume of 7.31 ml, calculate its density and decide which elemnt it is made of. The density of Ni is 8.9 g/ml, pt is 21.4 g/ml
A method of preparing a very pure alkane is to react the corresponding alkyl magnesium halid (grignard reagent) with water and collect the alkane product.
what is the ratio of the rate of reaction A to reaction B ? B) if the initial concentrations of the reactants are both 1.80 M, what is the ratio of the rate of reaction A to reaction B ?
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