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A sample of an unknown gas effuses in 12.4 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.59 min. What is the molar mass of the unknown gas?
If an automobile is able to travel 242 mi on 12.0 gal of gasoline, what is the gas mileage in km/L
A room contains 46 of air.How many kilowatt-hours of energy are necessary to heat the air in the house from 9 to 30? The heat capacity of air is 1.03.
The solution to Chemistry, Are there differences between having electron-donating groups and electron-withdrawing groups
A voltaic cell employs the following redox reaction: Sn^2+(aq)+ Mn(s)--> Sn(s) + Mn^2+(aq) Calculate the cell potential at 25 under each of the following conditions.
A 493 mL sample of solution contains 33.2 g of CaCl2 Calculate the molar concentration of Cl in this solution
If all four gases had initial concentrations of 0.650 M, calculate the equilibrium concentrations of the gases.
CaCO3(s) + 2 HCl(aq) -> CaCl2(aq) + H2O(l) + CO2(g) How many mol CaCO3 can be dissolved in 0.0575 mol HCl?
A 4.05 g sample of a compound containing only C, H, and O was burned completely. The only combustion products were 10.942 g CO2 and 4.476 g H2O. What is the empirical formula of the compound.
Compute the amount of heat required to boil 92.1 grams of benzene (C6H6), start from a temperature of 42.5 degrees Celsius.
What is the change in internal energy (in J) of a system that absorbs 0.588 kJ of heat from its surroundings and has 0.219 kcal of work done on it?
Many gases are shipped in high-pressure containers. Consider a steel tank whose volume is 65.0L and which contains O2 gas at a pressure of 16,500kPa at 23°C.
Ammonia burns in pure oxygen and reaction produces nitrogen and water. What is the amount of Nitrogen produced from 45.0 g NH3?
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