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A. Explain how much heat is released when 25.0g of methane burns in excess oxygen to form gaseous CO2 and H2O?
B. Compute the temperature of the product mixture if the methane as well as air is both at an initial temperature of 0.0 degrees Celsius. Presume a stoichiometric ratio of methane to oxygen from the air, with air eing 21% O2 by volume c of CO2 = 57.2 J/mol k; c of H2O(g) = 36.0 J/mol k; c of N2 = 30.5 J/mol k.
What is the vapor pressure, at 28 degrees C, of a solution made by mixing 80.0 g of C3H7SH and 120.0 g of CH3CN, if Raoult's Law is obeyed
at 1 atmosphere of pressure 25.0g of a compound at its normal boiling point are converted to a gas by the addition
A 15.0-g sample of a hydrocarbon is placed in a balloon at 1.00 atm and 25°C, and the volume of the balloon is 12.2 L. The hydrocarbon is 79.89% carbon and 20.11% hydrogen by mass.
The present limit of detection of THC in urine is 20 nangrams (1 nanogram =1*10^-9) per milliliter of urine (1milliliter = 1ML=1*10^-3L). Calculate the molarity of the solution at the limet of dection. Molecular weight of THC is 315 g/mol.
What is the final volume V2 in milliliters when 0.508L of a 46.4% (m/v) solution is diluted to 23.6%(m/v).
The metal tungsten crystallizes in a body centered cubic unit cell with one atom per lattice point. When x-rays with wavelength 0.7107 A are used, the second order Bragg reflection from a set of parallel planes in a(n) tungsten crystal is observed..
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 25.00mL of 0.274 M HNO3 (to two d.p.)
The density of potassium, which has the BBC structure and one atom per lattice point, is 0.855 g/cm3. The atomic weight of the potassium is 39.09 g/mol. Calculate the lattice parameter and the atomic radius of potassium.
Ammonia is produced by reacting nitrogen gas and hydrogen gas. N2(g) + 3H2(g) 2NH3(g) + 92kJ. for each of the following changes at equilibrium, indicate whether the equilibrium shifts toward product or reactants or does not shift
Explain with which food label value will you compare your experimental result when computing the percent difference in your determination of energy content. Briefly describe
How many grams of NaN3 are required to produce 340 L of nitrogen gas if the gas has a density of 1.25 g/L?
Explain vanderwalls attraction. What way it affects the physical properties of non-polar molecules
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