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A non-polar molecule of an unknown molecular mass is dissolved in benzene. When 12.5 g of this substance is used to make a 150.0 g solution, the solution's boiling point is found to be 141°C. What is the molar mass of the solute (Benzene's normal boiling point is 136°C, Kb = 2.53°C /m)?
The enthalpy change for the reaction of hydrogen gas with flourine gas to produce hydrogen flouride is -542kJ fo the equation as written H2+F2=2HF deltaH=-542kJ
what is the limiting reagent and the volume of CO2 formed when 11 L s2 reacts with 18 L O2 to produce Co2 gas adn SO2 gas at STP
If 18.4 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia?
What is the density of lead (in g/cm^3) if a rectangular bar measuring 0.500 cm in height, 1.55 cm in width, and 25.00 cm in length has a mass of 220.9 g?
mass of magnesium = .021 grams initial volume = 50.00 mL final volume = 25.6 volume of liquid displaced = 24.4 volume of hydrogen gas produced = 24.4?
what would be the saturation concentration molel of oxygen o2 in a river in winter when the air temperature is 0degc if
The molar solubility of a compound AX2 is 2.5 x 10-3 M. Calculate the value of Ksp for AX2. 1.5 x 10-3 6.3 x 10-8 1.4 x 10-8 3.4 x 10-9 none of these
Consider the case of 10 oscillators and eight quanta of energy. Determine the dominant configuration of energy for this system by identifying energy configurations and calculating the corresponding weights. What is the probability of observing the..
calculate strain on Co-Cr rod. Assuming compression is elastic, calculate stress on rod. Then compare stress with given properties. Based on stress value, was the compression purely elastic?
Explain what is the pH of the solution when 18.30 mL of 0.137 M trisodium hemimellitalate (trisodium benzene 1,2,3, tricarobxylate) is mixed with 25.00 mL of 0.274 M HNO3 (to two d.p.)
As a reference, a standard mixture containing 2.26 micrograms Co/mL and 1.92 micrograms Ti/mL was prepared and measured to have a signal-to-signal ratio of 2.41 Ti: 1.00 Co.
A 54.14 g sample of a substance is initially at 28.6 C. After absorbing 2631 J of heat, the temperataure of the substance is 179.1 C. What is the specific heat (c) of the substance
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