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Combustion examination of a 12.01-g sample of an unknown compound which contains simply carbon, hydrogen, and oxygen-produced 14.08 g CO2 and 4.32 g H2O. Determine the empirical formula for the unknown compound
Find Delta H for the combustion of ethanol (C2H6O) to carbon dioxide and liquid water from the following data. The heat capacity of the bomb calorimeter is 34.65 kJ/ K and the combustion of 1.750 g of ethanol raises the temperature of the calorime..
Compute pH of a solution containing .030 moles of TRIS and .020 moles of the salt TRISHCl in a total volume of 1.50L
How much ammonium hydroxide is needed to react completely with 75.0g of copper (2) nitrate in a double replacement reaction.
1.50 mol of helium gas in a cylinder is held at a volume of 22.4 L by a piston at 273K and 1.00 atm. Heat is supplied to the system to double the volume and temperature of the gas while maintaining the internal pressure at 1.00 atm.
Copper and zinc (elements 29 and 30, respectively) appear next to each other on the periodic table. A 5.50 g sample of zinc has a volume of 0.770 mL, while a 5.50 g sample of copper has a volume of 0.616 mL. Why?
How many moles and how many equivalent of H30+ are present in 50ml of a 0.3N solution of H2SO4
HCl solution to reach the methyl red endpoint. Calculate the weight percent NH3 in the aqueous water
Explain a gaseous fuel mixture stored at 744 mmHg and 298 K contains merely methane CH4 and propane C3H8. While 12.2 L of this fuel mixture is burned, it produces 771 kJ of heat.
a rectangular block of plastic measuring 1.34 cm by 2.27 cm by 1.39 cm floats in the middle of the pacific ocean. the
explain how to correct for the partial pressure of water vapor when calculating the partial pressure of a dry gas that is collected over water.
A 160.0 L helium tank contains pure helium at a pressure of 1870 psi and a temperature of 298 K. How many 3.5 L helium balloons can be filled from the tank
How many grams of MgO are produced when 40.0 g of O2 react completely with Mg?
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