Which compound has the shortest carbon—carbon bond length?

For ΔEsys to always be negative, what must be true?

Which of the following molecules do not have a dipole moment?   CH4   SF6 NH3 CO2 H2O I II III IV V  

Which of the following molecular geometries can be described as containing a central atom that possesses one lone pair of electrons?   tetrahedral T-shaped seesaw square planar square pyramidal I II III IV V

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Assignments are due on Mondays, unless otherwise noted, at 11:59 p.m.

How many moles of NO2 form when 1.35 kg of N2O5 completely decomposes? Use 2 N2O5(g) →  4 NO2(g) + O2(g)

Correctly identify the covalent species below.  CH2Cl2  NaF CCl4 BaBr2 CuSO4 I II III IV V

(15 points) A 30.00-mL sample of an unknown HCl solution is titrated with a 0.300 M NaOH solution. The equivalence point is reached when 10.00 mL of NaOH solution is added. What is the concentration of the unknown HCl solution? The neutralization reaction is HCl (aq) + NaOH (aq) →  H2O (l) + NaCl (aq)

(30 points total) Consider the precipitation reaction of Lead(II) nitrate in aqueous solution with that of potassium iodide in solution producing solid Lead(II) iodide and aqueous potassium nitrate. a. (5 points) Write the balanced molecular equation for the reaction.   b. (5 points) Identify the spectator ions and write the net ionic equation.   c. (15 points) Starting with 1 L of 0.200 M Lead(II) nitrate and 1 L of 0.200 M of potassium iodide solution, what is the limiting reagent and theoretical yield (in grams) of Lead(II) iodide for the reaction?   d. (5 points) If we are able to isolate 10.00 g of Lead(II) iodide what is the percent yield for the reaction?