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a balloon contains 0.76 mol N2, 0.18 mol O2, 0.031 mol He and 0.026mol H2 at 739 mmHg. what is the partial pressure of O2?
what is the molarity of the solution formed by mixing 0.20 mol of sodium hydroxide with enough water to make 150 ml of solution
A voltaic cell is based on the reaction Sn + I2 = Sn2+ + 2I-.
If 0.628 moles of a substance weighs 77.3 g, what is the molar mass of the substance, in units of g/mol?
If 5.78 mol of ethane (C2H6) undergo combustion according to the unbalanced equation C2H6 + O2 = CO2 + H2O how much oxygen is required?
Application of the concepts of VSEPR theory leads us to conclude that the shape of the SO3 molecule is
An air sample contains 0.032% CO2 (by mole). If the total pressure is 758mm Hg, what is the partial pressure of CO2
At 295 K, Keq = 7.0 x 10-2 for the following equilibrium: NH4HS(s) = NH3(g) + H2S(g) What is the equilibrium partial pressure (in atm) of H2S
A chemist found that a certain amount of a CFC gas required 186 seconds to effuse through a porous plug when the pressure was held constant.
calculate the approximate volume of a 0.600 mol sample of gas at 15.0 degrees Celcius and a pressure of 1.10 atm.
We add excess Na2CrO4 solution to 17.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.310 grams.
How many moles of H+ (H3O+) are produced in 40.0 m of 0.025 M HCL?
How many grams of methane gas (CH4) need to be combusted to produce 18.2 L water vapor at 1.2 atm and 275 K? CH4 (g) + 2 O2 (g)-> CO2 (g) + 2 H2O (g)
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