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A solution contains 10.0g of KOH and 900.0ml of water. The volume of the solution is 904.7ml. What is the mass percent of KOH? What is the mole fraction of KOH? What is the molality of the solution?
a sample of nitrogen gas occupies a volume of 3.87 liters at 52.8oc and 2.11 atm. what will the new temperature in degc
an elemental has a mass of 10.3 grams. if the volume is 58.4 liters and the pressure is 758torrs at a temperature of
when silver nitrate reacts with zinc chloride silver chloride and zinc nitrate are formed. if you react 2.22 g of
mg3n2s 3 h2ol 3 mgos 2 nh3ghow many moles of magnesium oxide are produced by the reaction of 3.82g of magnesium
1.at what temperature does the first solid phase form?2.what is the composition of this solid phase?3.at what
write the word formula and chemical equations for the reaction between hydrogen sulfide gas and oxygen gas that
a vertical triangular orifice in the wall of a reservoir has a base 0.9m long0.6m below its vertex and 1.2 m below the
a solution is made by dissolving 1.00 moles of sodium chloride nacl in 155 grams of water. if the molal boiling point
a nurse has to administer a 1000ml iv solution in 8 hours. find the number of drops per minute knowing the iv solution
the device shown is used in the semiconductor industry to polish silicon wafers. the wafers are placed on the faces of
What is the oxidizing agent, the reducing agent, and the substances being reduced and oxidized for the following Redox Equation
You have a gas cylinder, the weights on the piston weight 3kg. The radius of the piston is 40cm. Calculate the pressure of the gas in pascals in atmosphere.
Calculate the work in Joules when 2.5 mols of water vaporizes at 1 atmosphere pressure and 25 degrees C. The work is done in pushing back the atmosphere.
ironiii is polarographically reduced to ironiiat potentials more negative than about 0.4v versus sce and is further
what will the concentration be after 3.00 minutes? B)A zero-order reaction has a constant rate of 3.40×10^?4 M/s . If after 80.0 seconds the concentration has dropped to 3.00×10^?2 M , what was the initial concentration?
a mixture of 75mole propane and 25mole hydrogen is burned with 25 excess air. fractional conversions of 90 of the
What are the steps to determine isotope fractionation between water and vapor at 25 degrees C
The molar mass of corn oil is 890g/mole. How many moles and how many grams of sodium hydroxide are required to react with the 15mL (13.7g) of corn oil? Show your calculations.
a 27.7 ml sample of CO2 was collected over water at 25.0 degrees celcius and 1.00 atm.(the vapor pressure of water at 25.0 degrees celcius is 23.8 torr) What will the volume be at the same temperature and pressure after removing the water vapor?
A Pb-Sn alloy containing 40 wt% Sn is cooled from the liquid state to room temperature. How much of each phase is present in the material at room temperature. Sketch the expected microstructure.
calculate acidic and basic buffer capacity. How much of strong acid should be added to shift buffer pH one unit down, and how much of the strong base is needed to bring buffer pH one unit up?
There are two stereoisomeric 1,3-cyclobutane carboxylic acids. one can form a cyclic anhydride, the other can not. draw the structures of theses compounds and indicate which one can be converted to a cyclic anhydride. explain
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