Degrees celcius are combined at constant temperature
3.0 L of He gas at 5.6 atm pressure and 25 degrees celcius and 4.5 L of Ne gas at 3.6 atm and 25 degrees celcius are combined at constant temperature into a 9.0 L flask. What is the total pressure in atm in the 9.0 L flask?"
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If the temperaure changes from 22.0oC to 275oC and the specific heat of aluminum is .900 J/goC, how much energy, in J, was required?
At the start of the reaction there are 0.714 mole of H2, 0.984 mole of I2, and 0.886 mole of HI in a 2.20 L reaction chamber. Calculate the concentrations of the gases at equilibrium.
Toluene is a liquid compound similar to benzene. Calculate the mole fraction of Toluene in a solution that contains 112 g TOluene and 221 g Benzene.
A compound has a molar mass of 100 g/mol and the percent composition of 65.45% C, 5.5% O. Determine the empirical formula and the molecular formula.
The temperature of a sample of water increases from 21.7°C to 46.1°C as it absorbs 5605 J of heat. What is the mass of the sample?
A solution is made by dissolving 31.0 g of NaOH in approximately 450 mL of water in a volumetric flask. The solution becomes quite warm, but after it is allowed to return to room temperature, water is added to total 500 mL of solution.
Calculate the wavelength of a 141 g baseball in nm at this speed. What is the wavelength of a hydrogen atom at the same speed?
A chemist wishing to do an experiment requiring 47Ca (half-life = 4.5 days) needs 5.0 mg of the nuclide. What mass of 47CaCO3 must be ordered if it takes 48 h for delivery from the supplier?
The heat of fusion of ice (the heat associated with ice melting) is 6.0kJ/mol . Find the temepature of the coffer after the ice melts.
A zero-order reaction has a constant rate of 3.70×10-4 . If after 45.0 seconds the concentration has dropped to 2.50×10-2 , what was the initial concentration?
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