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Question- After recrystallization a student obtained a very low percent recovery of a solid. Describe a probable cause of this problem and explain what steps might be taken to increase the recovery.Provide complete description
Calculate the pH of the 0.20 M NH/0.26 M NHCl buffer. What is the pH after the addition of 20.0 mL of 0.050 M NaOH to 90.0 mL of the buffer solution
Methane enters a heat exchanger at a volumetric flow rate of 120.0 m3/min, at a pressure of 1.013 bar and temperature of 5.0°C. At these conditions, the specific enthalpy of methane is -45.181 kJ/kg.
The organic compound di-n-butyl phthalate, C16H22O4(l), is sometimes used as a low-density (1.046 g·mL-1) manometer fluid. Compute the pressure (in torr) of a gas that supports a 507-mm column of di-n-butyl phthalate
a hurricane is simply a steam engine which draws much of its destructive power from the evaporation and condensation of
If the heat capacity of the calorimeter is 85 JK , and the density of the liquid -1 is 2.34 gmL , what is the specific heat capacity of the unknown liquid?
what is the dose in rads to the animal in the first 4.0 hours following the ingestion of the radioactive material?
construct an energy level diagram (molecular orbital) for the molecule SO. We are then asked to comment on the ionic species of SO - bond order, bond distance etc. So far so good.
during photosynthesis an electron is believed to travel 25 angstroms within one picoseconds. the uncertainty in time
Using this information and the Clausius-Clapyron equation (P = const•exp(-?Hvap/RT)), calculate the vapor pressure of 3 nm droplets of mercury.
Strike anywhere matches contain the compound tetraphosphorous trisulfide, which burns to form tetraphosphorus decaoxide and sulfur dioxide gas.
Consider the combustion reaction: CH4(g) + O2(g)= CO2(g) + H2O(l) is this an exothermic reaction. If 100g of CH4 is burned, calculate the heat exchange (balance the equation).
In the reaction below, 7.57 atm each of H2 and Br2 were placed into a 1.00 L flask and allowed to react: H2(g) + Br2(g) 2 HBr(g) Given that Kc = 11.8, calculate the equilibrium pressure of Br2.
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