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If you fill the larger tank with oxygen to a pressure of 155 atm, to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior f
Calculate the freezing point and boiling point of the following aqueous solutions, assuming complete dissociation. 21.5 g of CuCl2 in 4.50 X 10^2 g of water
A 27 gram sample of an unknown hydrocarbon was burned in excess oxygen to form 88 g of CO2 and 27 g of H20? What is a possible molecular formula of the hydrocarbon?
Discuss the idea that the standard of living in society might be measured in units of kJ/person available in that society.
If the initial temperature of the water in the calorimeter was 20.25 °C, calculate the calorimeter constant (in J/K) for the coffee cup calorimeter.
A chemist has 4 moles of C2H6 to use in the study. How many moles of O2 will be needed in order to react all of the C2H6?
What is the denisty of a substance if a 1.50mL sample has a mass of 0.550g at room temperature? What is the specific gravity of the substance? Is the substance less dense or more dense than water?
A sample of calcium nitrate, Ca(NO3)2, with a formula weight of 164 g/mol, has 5.00 x 1025 atoms of oxygen. How many kilograms of Ca(NO3)2 are present? Use dimensional analysis
If each reactant molecule in the above image represents 0.0157 mol and the reaction yields is 89%, how many grams of Si-containing product form?
A sealed balloon is filled with 1.40 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 200. torr and the temperature is -26°C. What is th
A sample weighing 25g starts at 99 degrees celsius. It is put in a calorimeter containing 100g water. The water temperature begins at 20 degrees and both water and sample reach equilibrium at 32 degre
Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the reaction CaCOmc062-1.jpg(s) mc062-2.jpg CaO(s) + COmc062-3.jpg(g).
Calculate the equilibrium constant KP if the total pressure is 2.6 atm at that temperature.
Name the principal enzymes taking part in this bioconversion. To which class of enzymes do they belong to?Is this biocatalytic process used in the manufacture of alcohlic beverages?
One liter of a solution of pH 9 has how many hydroxyl ions (OH-) than 1 L of a solution of pH 4?
A fixed quantity of gas at 21 exhibits a pressure of 730 and occupies a volume of 4.40. Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.85 while the te
At a certain temperature and pressure 4.2 L of N2 reacts with 6.3 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced? (L)
A pressure of 0.600 atm of nitrosyl chloride is sealed in a flask and allowed to reach equilibrium. If 27.0% of the NOCl decomposes, what is the equilibrium constant for the reaction?
The calcium oxide is added to seawater, and a number of changes occur. First calcium oxide reacts with water to form calcium hydroxide. what is the word equation for this? and the balanced equation?
An ideal gas is in a cylinder with a volume of 250.0 mL at a temperature of 25 ºC and a pressure of 700 torr. The gas is expanded to a volume of 1.0 L and the temperature increased to 500 &ord
A graduated cylinder contains 18.5 {rm mL} of water. What is the new water level after 30.0 {rm g} of silver metal with a density of 10.5 {rm g/mL} is submerged in the water?
In a calorimeter, 10.0 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed?
Calculate the standard emf of a cell that uses the Mg/Mg2+ and Cu/Cu2+ half cell reactions at 25 deg C. What is the equation for the cell reaction that occurs under standard-state conditions?
Determine the freezing point of a solution of 60.0g of glucose, C6H12O6, dissolved in 80.0g of water.
How many moles of water vapor would have to be added to the container to increase the concentration of H2 to 0.320 M when equilibrium is re-established?