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Explain what is the magnitude of the partial positive and partial negative charges in the HBr molecule? (1D=3.36x10-30 C m; 1e = 1.6022x10-19 C; bond length HBr= 1.41 angstroms; Dipole Moment HBr= 0.82D)
Draw appropriate Lewis structure and VSEPR structure for oxalate anion. What is the O-C-O bond angle? What is the C-C-O bond angle? What is the hybridization of each carbon? On which atoms does the negative charge reside? Draw all resonance struct..
A Student dispenses 24.95 mL of a hydrochloric acid solution with an unknown concentration into an Erlenmeyer flask. The student then titrates the HCl solution with 0.168 M sodium hydroxide. If 24.33 mL of NaOH is required to reach the equivalence..
A buffer is perpared by adding 0.100 moles of sodium acetate to 0.100 moles of acetic acid and diluting to 1.00L. What is the pH of the solution after the addition of 5.00mL of 1.00 molar HCl
A solution of HNO3 is standardized by reaction with pure sodium carbonate: 2H+ + Na2CO3 ---> 2Na+ + H2O + CO2 A volume of 23.66 ± 0.04 mL of HNO3 solution was required for complete reaction with 0.814 ± 0.0009 g of Na2CO3
When coal is burned, the sulfur present in coal is converted to sulfur dioxide (SO2), which is responsible for the acid rain phenomenon. S(s) + O2(g) ? SO2(g) If 2.31 kg of S are reacted with oxygen, calculate the volume of SO2 gas (in mL) formed ..
Quantum numbers are used to uniquely identify an electron in an atom. The Pauli exclusion principle states that no two electrons in an atom may have the same set of four quantum numbers
A 1.5618-g sample containing sulfate ion was treated with barium chloride reagent, and 0.2321 g of barium sulfate was isolated. Calculate the percentage of sulfate ion in the sample.
Identifying the primary species (atoms, molecules, or ions) present in an aqueous solution of each of the following compounds. Decide which species are Bronsted acids or bases and whether they are strong or weak: (a). NH3, (b). CH3CO2H, and (c). N..
Yellowstone Lake has an area of 88,960 acres. How many liters of pure oleic acid (molecular mass = 282.5 and density = .895 g/ml) would be needed to cover this lake with a layer one molecule thick? Assume the oleic acid molecule occupies a cubic s..
Briefly describe experiments and expected outcomes to differentiate whether this inhibitor is a competitive inhibitor or a mixed inhibitor.
0.4647g sample of a compound known to contain only carbon, hydrogen and oxygen was burned to yield 0.8635g of CO2 and 0.1767g of H2O. What is the empirical formula of the compound
How many liters of hydrogen gas are collected over water at 18 0C and 725 mm Hg when 0.84 g of lithium reacts with water. P= 15.5 torr
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