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1) World energy supplies are often measured in the unit of quadrillion British thermal units (10^12 Btu), generally called a "quad." In 2015, world energy consumption is projected to be 5.81 x 10^17 kJ. 1 Btu = 1054 J. A Btu is the amount of heat required to raise the temperature of 1 lb of water by 1 degree F. How many quads of energy does world energy consumption quantity represent?
2) Current annual energy consumption in the US is 99.7 quads. Assume that all this energy is to be generated by burning CH4(g) in the form of natural gas. If the combustion of the CH4(g) were complete and 100% efficient, how many moles of CH4(g) would need to be combusted in order to provide the U.S. energy demand?
3) How many kilograms of CO2(g) would be generated in the combustion?
For each of the pairs of elements below give the formula for the simplest compound to be formed from them and explain the basis of your decision and note if the bond
a gas has a volume of 2.57L, a pressure of 1.54 atm, and a temperature of 24.5 C. calculate the number of moles of gas present.
From its electronic configuration, predict which of the first 10 elements would be most similar in chemical behavior to the as yet undiscovered element 170.
In this exercise it was assumed that the initial temperature of the metal was the same as that of the boing water. Qualatively, how would the calculated specific heat of the metal be affected
What is the FORMULA for the limiting reagent? What is the maximum amount of carbon dioxide that can be formed in grams? What amount of the excess reagent remains after the reaction is complete in grams?
A 2g sample of an unknown metal, M, was completely burned in excess O2 to yield .02224mol of the metal oxide, M2O3. What is the metal
A student following the procedure of the experiment determining the molar mass of a volatile liquid by the dumas method obtaint the following data for an unknown volatile liquid
Calculate ?Grxn at 298 K under the conditions shown below for the following reaction. SO3(g) + H2O(g) ? H2SO4(l) ?G°= -90.5 kJ P(SO3) = 0.20 atm, P(H2O) = 0.88 atm
The test tube contained some water (besides the metal) that was subsequently added to the calorimeter. Considering a higher specific heat for water, will the temperature change in the calorimeter be higher, lower, or unaffected by this technique e..
Before developing the dead-weight gauge, he worked in a mine shaft, and used a mercury manometer for measurements of pressure to more than 400 bar. Estimate the height of the manometer required.
A certain first-order reaction (A->product) has a rate constant of 7.50×10-3 at 45 . How many minutes does it take for the concentration of the reactant, , to drop to 6.25 of the original concentration?
Visualize whats happening at the molecular level and explain how your products wind up in the Hickman's collection well. What would happen if you placed the Hickman above the water condenser?
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