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Solid phosphorus pentabromide, PBr5, has been shown to have the ionic structure [PBr4+][Br? ]. Write the electron-dot formula of the PBr4+ cation. (Assign atomic charges where appropriate.)
what is the ph solution obtained by mixing 25.00 ml of 0.250 ml HCl and 25.00ml of 0.125M NaOH
An excess of NaOH is treated with 1.1L of dry HCl gas (measured at STP). What is the weight of NaCl formed?
HbS has normal shape under normal conditions, but under conditions of low [O2] the hemoglobin forms fibrous aggregations, giving the entire red blood cell a sickle shape. (See image of eight HbS molecules at right.)
What is the molarity of a HCl solution that contains 6.13 g of HCl in 352 mL of solution?
The density of a 23.0% by mass ethylene glycol (C_2 H_6O_2) solution in water is 1.03 g/mL. What is the molarity of the solution?
Draw resonance structures for 9-(hydroxymethyl)anthracene. Is it possible for all three rings to simultaneously have bensenoid
If the 53 g aluminum block is initially at 25^circ C, what is the final temperature of the block after the evaporation of the 1.02 galcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and t..
A 5.95-g sample of AgNO3 is reacted with BaCl2 according to the equation to give 3.21 g of AgCl. What is the percent yield of AgCl? AgNO3(aq) + BaCl2(aq) --> AgCl(s) + Ba(NO3)2(aq)
moles of an ideal gas in an initial state T1 = 300 K and P1 = 0.5 bar undergo an isothermal compression until the pressure of the system is four times the original pressure
The titration of 0.50 M NH3 with 0.50 M HCL results in a final endpoint and a concentration of 0.25 M NH4 Cl with essentially all the NH3 complete conversion to NH4^
Show the orbital-filling diagram for N (nitrogen). Stack the subshells in order of energy, with the lowest-energy subshell at the bottom and the highest-energy subshell at the top.
Give the structures of a hydrocarbon that has six carbon atoms and a) three vinylic hydrogens and two allylic hydrogens b) three vinylic hydrogens and no allylic hydrogens
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