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Elemental analysis indicates the simplest formula of an unknown is C2H4O. Explain when 0.775 g of the compound is dissolved in 50 g of benzene (C6H6) the solution freezes at 5.06 degrees Celsius. Explain what are the molecular weight as well as the molecular formula of the compound? The freezing point of pure benzene is 5.48 degrees Celsius as well as it's Kf is 5.12 degrees Celsius/m
A calibration curve was prepared from series of standards for various concentrations of this analyte and the line of best fit was determined to be S=1.56C + 0.2, where, S, is the signal in mV and, C, is the concentration in ppm (parts per million)..
Calculate the final temperature of the water and ice together once they have reached thermal equilibrium. The specific heat capacity of water is 4.184 J/g°C. Assume no heat is lost to the surroundings during the process
If 75.0 grams of metal at 75oC is added to 150 grams of water at 15.0oC, the temperature of the water rises to 18.3oC. Assuming no heat loss to the surroundings, explain what is the specific heat of the metal in J/goC
using as sample of gas of 12.0 moles nbspare in a tank of 8.00 litres at the temperature of 22.6 degree celsius.
each quarter produced by the u.s. mint is made up of copper and nickel alloy. in each coin there is 0.00740 moles of ni
In the laboratory experiment, as the 4-methylcyclohexene and water are being formed, they are constantly being disstiled from the reaction mixture into a separate receiving flask. Explain how this process helps the reaction proceed with a higher y..
if the half life of a certain radioactive element is 1,250 years what is the percent of atoms remaining after 7,500 years is ?
calculate the number of moles of gaseous N2 contained in a sample of 300 ml of gas saturated with water vapour at 25 degree celcius and 95 kPa.
use curved arrows to show the flow of electrons in each step, and note any relevant charges or lone pairs of electrons.
Aluminum is mined as the mineral bauxite, which consists primarily of Al2O3 (alumina). The aluminum can be refined by heating the bauxite to drive off the oxygen
Consider a saturated solution of calcium fluoride in 0.092 M potassium nitrate. Complete the following tasks, and then answer the question. a) Write the chemical equation corresponding to Ksp.
What is the energy of a single UV photon and mole of UV photons having a wavelength of 25 nm
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