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A 49.6-mL sample of gas in a cylinder is warmed from 27*C to 89*C. What is its volume at the final temperature? (Assume constant pressure.)
What is the activation energy for this reaction? a) 112 kJ/mol. b) 56 kJ/mol. c) 28 kJ/mol. d) 336 kJ/mol. e) 448 kJ/mol.
One method used to store energy during times of low demand is by pumping water uphill into a reservoir. When energy demand exceeds the output produced by power plants, the water is released, moves downhill, and is converted into electricity by a t..
An antacid tablet containing magnesium hydroxide as an active ingredient requires 22.6 mL of 0.597 M HCl for complete neutralization. What mass of Mg(OH)2 did the tablet contain?
Using Henry's Law to calculate gas solubility If air contains 78% N2 by volume, what is the solubility of N2 in water of 25oC and 1 atm (Henry's constant kH for N2 in H2O at 25oC = 7 x 10-4 mol/L.atm)?
Propane, C3H8, when used as a fuel, reacts with oxygen gas to produce carbon dioxide and water. What mass of oxygen will be required to react with exactly 14.05 grams of propane?
what is the UV absorption region of uracil,5-bromo uracil,5-chloro uracil, 5-iodo uracil, 6-methyl uracil?
How many metric tons (t) of oxygen are combined in a sample of pitchblende that contains 2.5 t of uranium? Analysis shows that 84.2 g of pitchblende contains
When 25g of magnesium reacts with 75g of hydrochloric acid it produces 95g of magnesium chloride and hydrogen gas.
Take element Z = 57 from the periodic table. Ionize it 56 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron
At 580 nm the wavelength of its maximum absorption, the complex FeSCN2+ has a molar absorptivity of 7X10^3 L cm-1 mol-1 calculate
water to give a solution that has a vapor pressure of 37.2 torr at 35 °C? Assume complete dissociation of the solute and ideal solution behavior
calcium chloride solution to give a new solution in which [Cl^-1] is .52 M, what is the concentration of the calcium chloride used to make the new solution?
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