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A closed gas system initially has pressure and temperature of 641 mm Hg and 638.0 oC with the volume unknown. If the same closed system has values of 859 mm Hg, 3.20 L and 580 K, what was the initial volume in mL?
The reaction A---> B is 4th order in the reactant A. derive an expression for the concentration of the reactant as a function of time [A]t
Calculate the pH of a solution prepared by mixing 50mL of a 0.10 M CH3NH2 solution with 25mL of a .20M HCl solution. (Kb CH3NH2 = 4.4 x 10^-4)
a sample of argon is at a pressure of 1.24*10^4 kPa of 24 degrees c in a rigid 25-L tank. How many moles of argon does this tank contain?
hawaiian macadamia nuts provide about 190 cal of energy usable from the digestion of these nuts per 1.0 oz serving. if
The valve between a 5-L tank containing a gas at 9 atm and a 10-L tank containing a gas at 6 atm is opened. Calculate the final pressure.
Calculate the free energy change if the ratio of the concentrations of the products to the concentrations of the reactants is 24.5, and the temperature is 37.0 °C? ?G°\' for the reaction is -16.7 kJ/mol. The constant R = 8.3145 J/(mol•K)
What is the mass of a piece of concrete that starts at 90.0 C, us immersed in a calorimeter with 350.0 g of water at 26.0 C
A 250 g yo-yo is swung on the end of a50 cm string at a constant speed of 4 m/s. What is the centripetal force acting on the yo-yo?
Approximately 12 million kilograms of phosphoric acid (H3PO4) are produced annually for fertilizers, detergents, and agents for water treatment. Phosphoric acid can be prepared by heating the mineral fluoroapatite (Ca5(PO4)3F) with sulfuric acid
The pressure is changed to 8.75 atm and the gas is cooled to 15 C. Calculate the new volume of the gas using the ideal gas equation.
A solution is initially 0.050M in acetate, CH3COO- (Kb = 5.6 x 10^-10). 10.0mL of 0.10 M HCl is added. Write a chemical equation for the neutralization reaction that occurs.
Explain why should apparatus always be clamped securely to a metal ring stand before starting a chemical reaction
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