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Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house.
Assuming that all the energy given off in the reaction goes to heating up only the air in the house, determine the mass of methane required to heat the air in a house by 15.0 Celcius. Assume each of the following: house dimensions are 30.0m 30.0m 2.8m ; specific heat capacity of air is 30 J/K ; 1.00mol of air occupies 22.4L for all temperatures concerned.
Calculate the value of the rate constant. Pick the choice from below which gives the correct reaction order and value of the rate constant for this reaction.
A 3.140 molal solution of NaCl is prepared. How many grams of NaCl are present in a sample containing 2.678 kg of water?
at 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor, 0.30 atm of carbon dioxide, and 0.27 atm of hydrogen. Is the system at equilibrium?
Calculate both the molar and molal concentration of water (H2O) in a solution of pure water when the water is at 10C and 30C. Use an accurate molecular weight for water
Ben Franklin dropped the oil on the surface of a lake and found that 2 mL of oil gave a circle of radius 30 m. Estimate the volumetric size of an oil molecule in angstroms, give one significant digit.
Why is the enthalpy based on the moles of NH3 and not HCl? c. Calculate the percent error in part (a) if the accepted Hrxn is -55.0 kj/mol
An emission line from K atoms is found to have two closely spaced components, one at 766.70nm and the other at 770.11nm. Account for this observation, and deduce
If a reaction mixture initially contains 486 of and 261 of , what is the mole fraction of when equilibrium is reached.
Calculate the concentration of the Ca2+ in ppm (or mg/L) using the correct number of significant figures assuming the 1.0 HCl has a density of 1.000 g/mL. Show these calculations clearly in your notebook and on your report form. Recall that calciu..
Practice entering numbers in scientific notation by entering the diameter of a hydrogen atom in its ground state
Using the quantities 3 grams of salicylic acid and 6ml of acetic anhydride noted in the macro scale procedure and any other necessary data, calculate the theoretical yield in moles and grams of aspirin.
How much heat is absorbed when 45.00 g of C(s) reacts in the pressence of excess SO2(g) to produce CS2(l) and CO(g) according to the following chemical equation?
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