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Calculate the heat of reaction from the standard heats of formation listed below. Then, calculate the standard enthalpy change when 36.8 grams of water is consumed in this reaction.
A 1.50-liter sample of dry air in a cylinder exerts a pressure of 3.0 atmospheres at a temperature of 25°C. Without change in temperature, a piston is moved in the cylinder until the pressure in
At 700k the equilibrium constant kc for the gas phase reaction between no and o2 forming no2 is 8.7x 10^6 the rate constant 0.54m-1s-1 what is the value of the rate constant for the forward reaction
A tire has a pressure of 780 mmHg at 27°C. If the tire is heated to 47°C on hot pavement, what the new pressure will be:
Sulfuryl chloride (SO2Cl2) in the gas phase decomposes to sulfur dioxide and chlorine gas. A) what is the rate law?
130 mL of an HCl solution with pH of 3.90 is added to 200 mL of an HNO3 solution. The resulting solution is 1.40. What was the pH of the original HNO3 solution?
A bacterial culture isolated from sewage produced 35.0 mL of methane, CH4, at 31°C and 753 mmHg. What is the volume of this methane at standard temperature and pressure (0°C, 760 mmHg)?
In the chemical formula for alu, there are 12 water molecules present. It is also possible to prepare the anhydrous compound potassium aluminum sulfate. On the "molecular scale" describe how a cryst
Calculate the number of moles of AgCrO4(Ksp=9.0x10^12) that will dissolve in 1.00L of 0.010 M K2CrO4 solution. what will be the ion concentrations at equilibrium?
The product of this reaction, ozone, is a pollutant in the lower atmosphere. Ozone is an eye and lung irritant and also accelerates the weathering of rubber products. Write Lewis structures for each
Consider the following thermochemical equation: CaCO3(s) CaO(s) + CO2 Ho = +178 kJ. How much heat must be absorbed by 22.5 g of CaCO3 to convert it completely to CaO?
If a bottle of nail polish remover contains 172 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL.
a 75.0 mL sample of potassium hydroxide, KOH, of unknown concentration is titrated with 42.5 mL of 0.575 M acetic acid. How many moles of KOH were in the sample?
Calculate the Heat of Fusion of ice if you had 15 grams of warm water at 40 degrees Celsius in a Styrofoam cup and you added 4.27 grams of ice originally at 0 degrees celsius and after the ice melte
Write Lewis structures that obey the octet rule for each of the following molecules and ions. (In each case the first atom listed is the central atom.)
If a 1500 rm kg car can accelerate from 30 km/h to 50 km/h in 3.1 s, how long will it take to accelerate from 50 km/h to 75 km/h? Assume the power stays the same, and neglect frictional losses.
The final pressure is 15 times greater that the initial pressure. What is the final volume of the gas, assuming constant temperature.
A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 of nitrogen and 4.05 of oxygen. Calculate the empirical formula of the compound.
A 335 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 628 mmHg. Calculate the moles of Argon present.
Determine the mass of silver phosphate formed when 4.33 g of silver nitrate is reacted with 22.7 mL of .118 M K3PO4
What would be the boiling point of acetone at this elevation (ΔHvap = 32.0 kJ/mol)? What would be the vapor pressure of acetone at 35.0°C at this elevation?(torr)
When 2.55 g of an unknown weak monoprotic acid (HA, molar mass = 85.0 g/mol) is dissolved in 250.0 g of water. Calculate Ka for the unknown acid.
Rubidium Iodide has a lattice energy of -617 kJ/mol, while Potassium Bromide has a lattice energy of -671kJ/mol. Why is the lattice energy of Potassium Bromide more exothermic than the lattice energ
If the methane contained in 3.00 of a saturated solution at 25 was extracted and placed under STP conditions, what volume would it occupy? Express your answer numerically in liters.
Show how the rate law may be expressed in pseudo-first order terms and calculate the corresponding pseudo-first-order rate constant. Assume the reaction occurs at a pressure of 1 atm.