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A gas mixture of three gases exerts a total pressure of 1 atmosphere. The first gas exerts a pressure of 0.3 atmospheres. The second gas exerts a pressure of 0.4 atmospheres. What is the pressure of He?
Calculate the theoretical titration curve for the titration of 50.00 mL of 0.1000 M Na2CO3 with a 0.2000 M solution of HCl. Propose the indicators.
What pH range will allow the selective precipitation of one of the ions after saturation with H2S?
At high pressures, Ne behaves as an imperfect gas. In the range 300 K to 500 K the equation of state for one mole of Ne (g) can be written as : PV = RT + BP where B is a constant.
Given that balanced equation 26.17 grams of Fe2O3 are mixed with 6.970 grams of carbon. How many grams of each reactant remain after the reaction is complete, and how many grams of each product is produced
If the ion of element X has a mass number of 230 and has 86 electrons, what is the identity of the element? How many neutrons does it have?
a gaseous mixture of and contains 32.8 nitrogen by mass. what is the partial pressure of oxygen in the mixture if the
If an unknown substance with the formula Ba(subscript x)Cl(subscript y)•(variable z)H(subscript 2)O was added to water and Na(subscript 2)HPO(subscript 4), the precipitate formed is Barium phosphate. What is the net ionic equation for this precipi..
Water in an enclosed vessel at 17°C contains a concentration of dissolved oxygen of 6 mg/L. At equilibrium, determine the concentration of oxygen in the space above the water in molal fraction. and the total pressure in the vessel. Henry's law con..
the process (A-> B is first order with a half-life of 0.21 seconds. How long would it take for 15.0M of A to decrease to 0.25 M?
If a 45kg sample of water absorbs 345kj of heat. If the water was initially at 22.1 degrees Celsius, define what is the final temperature
Name and explain the theory that allows scientists to predict the shape of a molecule?
"Describe the functions performed by various IT departments (for example, help desk, planning, operations, development, and planning).
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