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What is the internal energy of an ensemble of 1 mole of particles having two non-degenerate electronic energy levels separated by 1000cm^-1 at 1310K. Only consider the contribution coming from the electronic particion function. Hint: U =- (d lnQ/d beta) ; Q = q^N/ (N!) , where N is the total number of particles.
At 25°C the heat of fusion of aluminum is 10.6 kJ/mol and the heat of sublimation is 326.4 kJ/mol. What is the heat of vaporization of aluminum at 25°C?
The metal used to make the US nickel coin is an alloy of 75% copper and 25% nickel. What maximum mass of alloy could be produced if only 450 kg of nickel and 1180 kg of copper were on hand?
The density of aluminum is 2.702 g/cm3. What is the final liquid level of water if 1.130 ounces (oz) of aluminum is dropped into a graduated cylinder containing
Determine the percent yield for the reaction and also find out at which point the total pressure = 188 torr.
An analytical procedure requires a solution of chloride ions. how many grams of caCl2 must be dissolved to make 2.15 L of 0.0520 M Cl-.
How many moles of bromine will react with 0.0500 mole of C2H2 in the reaction C2H2 + 2 Br2 -> C2H2Br4?
If 2.55 mol of ethane (C2H6) undergo combustion according to the unbalanced equation C2H6 + O2 -→ CO2 + H2O , how much oxygen is required? Answer in units of mol.
A 530. g piece of copper tubing is heated to 92.0°C and placed in an insulated vessel containing 49.5 g of water at 39.5°C. Assuming no loss of water and heat capacity for the vessel of 10.0 J/K,
An unidenti?ed organic compound X, containing C, H, and O was subjected to combustion analysis. When 228.4 mg of pure X was burned 627.4 mg of CO2 and 171.2 mg of H2O were obtained. Determine the simplest formula of the compound X?
A bottle of 5.5 M acid has 21.3 mL remaining in it. If the acid is diluted to 700 mL, what is the new concentration of the acid?
what is the mass of a rectangular piece of copper 24.4 cm x 11.4 cm x 6.6 cm? The density of copper is 8.92 g/cm^3.
A canister is filled with 310 g of ice and 100 g. of liquid water, both at 0 C . The canister is placed in an oven until all the has boiled off and the canister is empty.
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