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Ethanol is a possible fuel. Use average bond energies to calculate delta Hrxn for the combustion of ethanol.CH3CH2OH(g)+3O2(g)->2CO2(g)+3H2O(g)
What is delta Hrxn
A sample of H2SO4 contains 1.11 grams of H (1.01 g/mol). How many moles of H2SO4 (98.02 g/mol) are present?
how many mL of 1.00M NaOH should be added to .700 liter of 1.00M NaH2PO4? pKa = 6.82
A chemist is trying to come up with a new solution-based battery for use in a new car. He chooses iron and zinc as the metals for his research and .
compound noradrenaline contains 56.79% C, 6.56% H, 28.37% O, and 8.28% N by mass. What is the empirical formula for noradrenaline?
Energy costs vary greatly with energy source: coal @ $25.00/ton, gasoline @ a pump price of $2.00/gal, and electricity @ $0.1000/kWhr. Conventional practice is to put these on a common basis by expressing
What mass of this substance must evaporate in order to freeze 230 of water initially at 24? (The heat of fusion of water is 334 the specific heat of water is 4.18 .)
dissolved in water in a calorimeter that has a total heat capacity of 1.494 kJ·K-1, the temperature decreases by 0.500 K. Calculate the molar heat of solution of KSCN.
what is the concentration of oygen dissolved in water at 20 degrees celsuis in equilibrium with a gas mixture at 0.81 atm.
In the lower troposphere, ozone is one of the components of photochemical smog. It is generated in air when nitrogen dioxide, formed by the oxidation of nitrogen monoxide from car exhaust, reacts by the following mechanism.
Provide a structure for the following compound: molecular mass 101; IR: 3397, 3200, 1655, 1622 cm-1; 13C NMR: ? 27.5, ? 38.0 (weak), ? 180.5 (weak).
Calculate the gas NH3 in ppm over NH4OH solution.The density of the solution is 0.9g/ml and the Commercial concentrated aqueous ammonia is 29%.
How many liters of NO(g) can be made from 17.57 L of O2(g) and 16.55 L of N2(g) at STP?
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