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a) Explain the octet rule.b) Briefly describe two situations which are exceptions to the octet rule; include relevant chemical formulas to support your descriptions.
Determine what is the mass percent yield from 2.57 grams of Sb in excess Sulphur , if 1.56 g of Sb 2 S 3 is obtained?
Calculate the mass of propylene glycolC3H8O2 that must be added to 0.320kg of water to reduce the vapor pressure by 2.88torr at 40C Pressure H2O 40C 55.3torr
Find the standard change of entropy for the formation of CH2Cl29g) from its gaseous elements in their standard states. Please show and explain how you got the answer. Specifically how you came up with a balanced equation.
A solution is prepared by mixing 10g of water with 10g of ethanol. What is the mole fraction of water in the vapor phase at 30 degree C. The vapor pressure of water at 30 degree C is 32 torr and ethanol is 78 torr. The molar mass of water is 18.02..
Predict whether each of the following reactions will be spontaneous at all temperatures, nonspontaneous at all temperatures, spontaneous at low temperatures, or spontaneous at high temperatures
If an unknown is water soluble, why is it unnecessary and potentially misleading to perform (and interpret) the result of the solubility of this unknown in 5% HCl.
calculate the ph of a solution of calcium carbonate having [calcium ion]=1.3x10^-4M,[carbonate ion]=3.8x^10-5M and [HCO3]=8.8X10^-5M
what will be the final temperature in degrees celsius if the volume of a gas container at 32.0degc changes from 1550 ml
Draw an energy diagram for the enthalpy of solution of NaCl given that the lattice energy is 773 kJ/mol, the enthalpy of hydration
Iron can be prepared by the reaction of Fe2O3 with carbon according to the equation: 2Fe2O3(s) + 3C(s) 3CO2(g) + 4Fe(s) If 401 g Fe2O3 and 205 g C are heated together, how many grams of iron could be produced?
A very crude model of the buckminsterfullerene molecule (C60) is to treat it as a collection of electrons in a cube with sides of length equal to the mean diameter of the molecule (0.7nm)
Suppose you carry out a TLC separation of acetaminophen and phenacetin on silica gel using a nonpolar solvent. Which should have the higher R1 value. why
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