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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)
Many elements can have more than one charge or oxidation number. In this set of problems, we will assign oxidation numbers to each atom in sulfate, carbonate, bicarbonate, bisulfate, sulfite, nitrate, nitrite, chlorate, and perchlorate.
A 2.983 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution. To this solution was added 1.910 grams of KI and 50.00 mL of a 0.00894 M KIO3 solution.
a 192 g piece of copper is heated to 100.0c in a boiling water bath and then dropped into a beaker containing 75.0 ml
Which quantity has the greatest mass. 2.0 mol of Na, 2. 0 mol of Na2O, 2.0 mol of NaCl, 2.0 mol of O2
The standard enthalpy change in the combustion of the hydrocarbon octane is delta H=-5.48*10^3KJ/Mol C8H18. How much heat, in kilojoules, is liberated per gallon of octane burned? Density of octane = 0.703 g/mL 1 Gal=3.785 L
A reaction mixture contains 0.41 M I2, 0.27 M Br2 and 3.5 M IBr. Which of the following statements is TRUE concerning this system. I2(g) + Br2(g) 2 IBr(g) Kc = 1.1 × 102
A 5g packet of an effervescing stomach antiacid contains 2.68 g of calcium hydroxide to neutralize stomach acid. What volume of stomach acid (containing 0.010mol/L HCl) could be neutralized
Breathalyzers determine the alcohol content in a person's breath by the following (unbalanced) redox reaction:
what is steam distillation and why is it a preferred technique to purify high boiling liquids that are water insoluble?
In what ways do the properties of water influence the strength of: (a) electrostatic interactions; (b) hydrogen bonding; and (c) hydrophobic interactions. Explain in physical and chemical terms.
no electrons are emitted from the surface of metallic cs until the frequency of the radiation reaches 4.50 x 1016 hz.
A compound is 42.9% C, 2.4% H, 16.7% N, and 38.1% O, by mass. Addition of 6.00 grams of this compound to 50.0 ml benzene, C6H6 (d = 0.879 g/mL), lowers the freezing point from 5.53 to 1.37 degrees celsius. What is the molecular formula of this com..
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