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Cumene, a hydrocarbon, is a compund composed only of C and H. It is 89.94% carbon, and its molar mass is 120.2 g/mole. What are the empirical and molecular formulas of cumene?
the label of an aerosol spray can contains a warning that the can should not be heated to over 130 degrees f because of
what is the lewis dot structure for if6 iodine
A gaseous mixture of O2 and Kr has a density of 1.102 g/L at 420 torr and 300. K. What is the mole percent O2 in the mixture?
A gas is confined to a cylinder under constant atmospheric pressure. When 419 J of heat is added to the gas, it expands and does 103 J of work on the surroundings. What is the value of delta H for this process. And what is the value of delta E for..
Find the approximate pH range suitable for the separation of Fe3+ and Zn2+ ions by precipitation of Fe(OH)3from a solution that is initially 0.015 M in both the ions. Assume a 99% precipitation of Fe(OH)3.
Calculate the molecular mass of the nonionic solutes: 8.02 g of solute in 861 g of water lower the freezing point to -0.430 degrees C.
In either of the simple distillation experiments, can you account for the boiling point of your product in terms of the known boiling points of the pure components of your mixture?
write a balanced equation for the reaction of phosphorus trichloride pcl3 with water h2o forming phosphorous acid h3po3
A liquid mixture of methyl acetate and ethyl acetate at 50oC and 1 atm is in equilibrium with gas containing methyl acetate, ethyl acetate and 23 mole % nitrogen. What are the molar fractions of ethyl and methyl acetate in the liquid and gas phase
When 0.455g of Thyroxine is dissolved in 10.0g of benzene, the freezing point of the solution is depressed by 0.3000C. What is the molar mass of Thyroxine?
SnI4 is soluble in acetone. What does this tell you about the ionic nature of this compound? Is the charge on the tin is actually +4? What was the effect of adding KI to the acetone solution?
for a certain change, the value of change in U is -2.37kJ. during the change the system absorbs 650 joules. how much work did the system do?
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