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What is the heat, q, of a 12.5 g block of copper with an initial temperature of 19 °C and a final temperature of 68 °C? Express answer to 3 significant figures as a positive number in units of Joules.
The rate law for the reaction, 2NO(g) + O2(g) 2NO2(g), is found to be: rate of reaction = k [?NO]2?[O2?]2. The first, fast step is 2NO(g) N2O2 (g)
A 2.95 -g sample of an unknown chlorofluorocarbon is decomposed and produces 585ml of chlorine gas at a pressure of 748 mmHg and a temperature of 298K.
what is the maximum kinetic energy of an ejected electron if platinum metal is irradiated with 174-nm light? the
Consider the following reactions and their associated equilibrium constants: A + 2B ~~~> C K1 C ~~~> D + E K2 For the reaction A + 2B ? D + E, having equilibrium constant Kc, A) Kc = K1 + K2 D) Kc = (K1)(K2) B) Kc = K1/K2 E) Kc = K2/K1 C) Kc = K1 ..
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.)
A mixture of 0.146 moles of C is reacted with 0.117 moles of O2 in a sealed 10 L vessel at 500 K producing a mixture of CO and CO2. Explain the total pressure is 0.6797 atm. Define what is the partial pressure of CO
List and describe briefly the 2 methods which are used by drug companies to discover lead compounds
calculate the ph of a buffer made with 0.50m phosphoric acid and 0.75m sodium dihydrogen phosphate. ka 7.5 x
When 0.200g of a high-molecular-weight compound is dissolved in water to form 12.5mL of solution at 25 degrees celsius, the osmotic pressure of the solution is found to be 1.10x10^-3 atm. What is the molar mass of the compound
at 1 atm, how much energy is required to heat 55.0 grams of water at -24.0 degrees Celsius to water at 157.0 degrees Celsius
A scuba diver with a lung capacity of 5.2 L inhales a lungful of air at a depth of 45 m and a pressure of 5.5 atm. If the diver were to ascend to the surface (where the pressure is 1.0 atm) while holding her breath.
A 50.0 mL glucose solution contains 3.00 g of glucose. What is the mass/volume percent of this solution
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