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Liquid butane C4H10 , the fuel used in many disposable lighters, has delta Hfinal=-147.5 kj and a density of 0.579 g/ml . Use Hess's law to calculate the enthalpy of combustion in kJ/mol.
Calculate the number of moles of HCl that would be consumed by 1.0 g of NaHCO3
What are the mass and mole fraction of all components in the mixture? What is the average molecular weight of the mixture?
the students product is contaminated with 5% o a constitutional isomer. give the approximate expected melting point of the students product
the reaction a->b=c is found to be a zero order. If it takes 4.3 x 10^2 secounds for an initial conventration of A to go from .50 M to .25 M, what is the rate constant for the reaction
Write a general formula to represent the chemical composition of fats and oils. How do they differ from one another
Write the equilibrium expression, and calculate the equilibrium constant for this reaction at this temperature.
An aerosol can has a gas pressure of 133 kPa at 293 K. Calculate the pressure when the can is heated to 460 K.
First order decomposition in which the rate constant is 0.00830 sec-1, how long will it take (in minutes) until 0.309 mol/L of the compound is left, if there was 0.517 mol/L at the start
a solution contains 4.00g NaOH, 5.61g KOH, and 1.03g RbOH in 90.0g of H2O. The solution has density of 1.08g/mL. What is the molality of OH?
What is the structure of the most abundant acylium ion (and resonance structure) that would be observed in mass spectral analysis
Describe why this is based on the wavelength range that is transmitted. What color would you see if you mixed the two solutions with ?max = 520 and ?max = 610?
If the crucible Cover falls and breaks during the heating of Magnesium, do you have to start the experiment over again?
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