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When no single electronic formula can be drawn for a stable molecule so as to maintain the octet rule and still fit the observed properties, the situation is best described in terms of
A. polarity.
B. coordinate covalence.
C. resonance.
D. unsaturation.
E. the Pauli exclusion principle
the advantages and disadvantages of using methanol, ethanol and water as a solvent for reactions with sodium borohydride?
Use the van der Waals parameters for chlorine to calculate approximate values of (a) the Boyle temperature of chlorine and (b) the radius of a Cl2 molecule regarded as a sphere.
plot the titration point. make sure there is enough data. F. what indicator wouldyou use for this titration. what color change would you observe.
Consider equal volumes (say 1 rm L) of a substance in the solid, liquid, and gas phases. Arrange them in order of decreasing mass. If the mass difference between samples is relatively small, rank the items as equivalent.
Then 1.00 mL of a 10.9 mM Lithium standard was added to 9.00 mL of serum, and this spiked serum gave an intensity reading of 721 units. What is the original concentration of Li in the serum?
All ammonium compounds, that comprise the ammonium ion (NH4+) and negative ion, are thermally unstable. Explain two ways that ammonium compounds decompose when they are heated.
Calculate the pH during the titration of 30.00 mL of 0.1000 M NaOH with 0.1000 M HCl after 30.31 mL of the acid
Determine the normal boiling point of a substance whose vapor pressure is 55.1 mm Hg at 35°C and has a Hvap of 32 .1 kJ/mol.
during exercise a person breathes in between 100 and 200 L of air er minute. if a person is exercising enough to breathe in an average of
If the balloon rises to an altitude at which the temperature is -2.8°C and the pressure is 0.068 atm, what will the volume of the balloon be?
write the equations for two different acid base reactions of diethylamine with water. Indicate the direction of the equlibrium for both reactions. The pKa of diethyl ammonium ion is 10.94.
Write ionic and net ionic equations for the following reactions. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)
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