Answers edited by Dylan K.

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• What would cause an atom to have a high electronegativity value?
  
• What causes shielding effect?
  
• How do you find the derivative using limits of #f(x)=3x+2#?
  
• Does a negative #DeltaH# correspond to an endothermic or exothermic process?
  
• Question #4a7f5
  
• Question #ae614
  
• Question #00965
  
• How would you balance the following equation? #?BF_3 + ?Li_2SO_3 -> ?B_2(SO_3)_3 + ?LiF#
  
• Question #c7335
  
• Question #a78ae
  
• Question #aa9b7
  
• Question #a28c7
  
• How do we describe the #"electronic geometry"# with respect to #SBr_2#? #(a)# #"bent"#; #(b)# #"trigonal planar"#; #(c)# #"tetrahedral"#; #(d)# #"octahedral"#?
  
• Question #cf092
  
• Question #5770b
  
• If the symbol X represents a central atom, Y outer atoms, and Z lone pairs on the central atom, the structure #Y- :X: -Y# could be abbreviated as #XY_2Z_2#. How would you classify these structures by the hybridization of the central atom?
  
• What type of reaction is #FeS + HCl -> FeCl_2 + H_2S#?
  
• Question #39bd1
  
• Question #3c373
  
• Question #88966
  
• How many molecules of oxygen are produced by the decomposition of 6.54 g of potassium chlorate in the reaction #2KClO_3(s) -> 2KCl(s) + 3O_2(g)#?
  
• What is the difference between a homogenous and heterogeneous mixture?
  
• What is the mass, in kg, of 14.0 L of gasoline? (Density 0.680g/#cm^3#)?
  
• Saccharomyces cerevisiae produces ethanol by fermentation. The theoretical yield of ethanol from 2.5 g of glucose is ______________ g ?
  
• How many pi bonds are in #CO_2#?
  
• What happens when magnesium turnings are added to a solution of iron (Ill) chloride?
  
• What is the molal concentration of lead nitrate in 0.726 M #Pb(NO_3)_2#?
  
• What is a chemical reaction that absorbs heat from the surrounding? Does this reaction have a neutral, positive or negative #DeltaH# at constant pressure?
  
• How do solutions differ from heterogeneous mixtures? Other classes of matter?
  
• If 23.55 mL of 1.235 M barium hydroxide is required to fully neutralize a 25.6 mL solution of acetic acid, what is the concentration of the acid solution in M?
  
• What atomic or hybrid orbitals make up the sigma bond between I and Cl in iodine pentachloride, #ICl_5#?
  
• Question #3d976
  
• Is #FeCL_3# ionic or covalent?
  
• Would these orbital descriptions be atomic or hybrid orbitals? s, p, d, f, #sp^2#, #sp^3#
  
• How do you convert centimeters to meters?
  
• Question #bc771
  
• How are sigma and pi bonds form?
  
• Question #940bc
  
• What happens to electrons when a polar covalent bond forms?
  
• How many grams of nitrogen dioxide must react with water to produce #5.00*10^22# molecules of nitrogen monoxide?
  
• Question #1d33e
  
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