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Suppose that an atmospheric chemist combines 165 of methane at STP, 870 of oxygen at STP, and 56.5 of at STP in a 1.8 flask. The reaction is allowed to stand for several weeks at 275 .If the reaction reaches 90.0% of completion (90.0% of the limiting reactant is consumed), what are the partial pressures of each of the reactants in the flask at 275 ?
A solution was prepared by dissolving 28.0g of KCl in 225g of water. Calculate the mass percent of KCl in the solution.
When 64.5 g of HCl are allowed to react with 17.6 g of O2, 50.4 g of Cl2 are collected. Determine the limiting reactant, theoretical yield of Cl2 and percent yield for the reaction.
What is the molar concentration of Br^- ions in a 0.235 M aqueous solution of FeBr3, assuming complete dissociation?
What is the molarity of a solution of vinegar that is 5.00 % by mass acetic acid (CH3CO2H) and has a density of 1.01 g/mL.
What is the concentration of unknown acid solution? Write the neutralization reaction, balance it, name the products THEN Solve the problem above.
whether these collisions are elastic or inelastic makes no difference as long as the walls are at the same temperature as the gas. Explain. Explain the kinetic molecular theory of gases
An unknown metal X with a mass of 28 grams absorbs 58 J of heat. calculate the heat capacity if Its temperature raises from 31.1 °C to 39.9 °C.
A moth-ball, composed of naphthalene (C10H8), has a mass of 1.32 g. How many naphthalene molecules does it contain?
The Balmer series of transitions for the hydrogen atom result in absorption of photons that all originate from the n = 2 level. What are the longest and shortest wavelength photons in the Balmer sequence?
A gas occupying 28mL at standard conditions is heated to 18C while the pressure is reduced to 0.98221 atm. What is the new volume occupied by the gas? Answer in units of mL.
A 1L steel tank has a safety valve that opens when the internal pressure exceeds 850 torr. The tank is filled with He at 23 oC and 0.991 atm.
Both potassium chloride (KCL) and potassium hydroxide (KOH) are very soluble in water. However, as one increases the temperature of the solution, KCL becomes more soluble and KOH becomes less soluble. Explain
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