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When a sample of PCl5(g) (0.1612 mol/L) is placed in 35.00 L reaction vessel at 878.0 K and allowed to come to equilibrium the mixture contains 3.122 mol of PCl3(g). What is the concentration (mol/L) of PCl5(g)?
calculate the theoretical moles of NaOH that should be necessary to reach the equivalence point
How much heat is needed to convert 10.0 g of ice at -25.0ºC to water at 80.0ºC?
What is the mass of one mole of the gas when the density of a gas is 0.0151 g/mL at 150 degrees Celsius and 1.50 atmospheres?
CaCN2 + 3 H2O → CaCO3 + 2 NH3 . How much NH3 is produced if 187 g of CaCO3 are produced?
How many kJ of heat are required to produce 13.7g NO2, by 2NO2+ O2 --> 2NO2. the heat of reaction is 113.04
What is the final concentration of copper in the flask b)what is the uncertainty in the value of the copper concentration?
What is the equilibrium expression for the following reaction. Please interpret as an equilibrium symbol.
A cylindrical bar of metal having a diameter of (4.740x10^0) mm and a length of (9.9406x10^2) mm is deformed elastically in tension with a force of (1.281x10^4) N.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 67.5 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Compare the chemical structure of the nylon polymer that has been prepared to the polypeptide trimer of glycine, the simplest of the naturally occurring amino acids
What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones? i) What is the three dimensional structure of methane? Why?
Iron has a density of 7.874. g/cm3. What is the mass of a rectangular block of iron with dimensions of 3.000 cm by 4.000 cm by 5.000 cm?
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