Answers created by Dylan K.

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• For the following anion, which C-C bond would you expect to be longest?
  
• What is the molarity of an HCl solution if 25.0 mL of a 0.13 M NaOH solution are needed to neutralize 30.0 mL of the sample?
  
• If 1.67 mol of copper and 6.5 mol of silver nitrate are available to react by single replacement, what is the limiting reactant?
  
• Question #008eb
  
• The table below gives information about two isotopes of element X. How would you calculate the average atomic mass of element X?
  
• What is the Lewis electron-dot structure for a molecule of hydrogen chloride?
  
• How do you find the geometry of #TeCl_4# using the VSEPR method?
  
• What can the electronegativity difference between the atoms in a molecule of HCI can be used to determine?
  
• What type of reaction is #2H_2O -> 2H_2 + O_2#?
  
• Question #fea87
  
• Lead has a density of 11.3 g/#cm^3#. What volume of lead has a mass of 226 g?
  
• Question #30be5
  
• How do you write the electron configuration for silicon?
  
• How would you arrange the following bonds in order of increasing ionic character? How is this determined?
  
• Question #31146
  
• How many moles of nitrogen atoms are there in .3400 moles of ammonium nitrate, #NH_4NO_3#?
  
• What do the four quantum numbers describe about an electron?
  
• Question #3df05
  
• How many mols of #H_2SO_4# will neutralize 78.3 mK of 0.187 N #NaOH#?
  
• How are atoms arranged in molecular compounds?
  
• How do you calculate the pH of acid rain?
  
• What is the relationship between oxygen use and heat production?
  
• If 12.5 grams of the original sample of cesium-137 remained after 90.6 years, what was the mass of the original sample?
  
• Magnesium reacts with oxygen gas to produce magnesium oxide, light, and heat. What type of reaction is this?
  
• What is the gram formula mass of #Al_2(SO_4)_3#?
  
• How does a antimony-122 atom become a antimony -122 ion with a #3^-# charge?
  
• What does the sign #uarr darr# represent with respect to electrons?
  
• How do you determine the heat of formation of hydrogen peroxide from the given bond energies: #H_2(g) + O_2(g) -> H_2O_2(g)#? Bond energies: H-H = 432; O2 = 494, O-H = 459. O-O = 142?
  
• What type of reaction is #FeS + HCl -> FeCl_2 + H_2S#?
  
• Is sodium a metal or a nonmetal?
  
• How do you calculate the number of oxygen atoms in 9.20 moles of magnesium iodate?
  
• How do you determine whether a element is not isoelectronic with another element?
  
• What is the difference between a homogenous and heterogeneous mixture?
  
• How do you find the derivative of #g(t)=t^-2#?
  
• Whats is metallic bonding?
  
• Question #00965
  
• Do nonmetals prefer to receive electrons in chemical reactions?
  
• Question #940bc
  
• Question #fa212
  
• Is #FeCL_3# ionic or covalent?
  
• What is the molal concentration of lead nitrate in 0.726 M #Pb(NO_3)_2#?
  
• Question #c7335
  
• How many Li atoms are in 5.8 moles of Li?
  
• How do we describe the #"electronic geometry"# with respect to #SBr_2#? #(a)# #"bent"#; #(b)# #"trigonal planar"#; #(c)# #"tetrahedral"#; #(d)# #"octahedral"#?
  
• Question #5770b
  
• Question #05d9b
  
• Question #37a44
  
• Question #3c373
  
• What coefficient is placed in front of #O_2# to complete the balancing of the following equation #C_5H_8 + ?O_2 -> 5CO_2 + 4H_2O#?
  
• Question #bc771
  
• How do you convert centimeters to meters?
  
• Question #3d976
  
• Question #4a7f5
  
• Question #aa9b7
  
• Question #a28c7
  
• How would you balance the following equation? #?BF_3 + ?Li_2SO_3 -> ?B_2(SO_3)_3 + ?LiF#
  
• Question #a78ae
  
• How do you differentiate #f(x)=sqrt((1-4x)^3# using the chain rule.?
  
• What atomic or hybrid orbitals make up the sigma bond between I and Cl in iodine pentachloride, #ICl_5#?
  
• How many pi bonds are in #CO_2#?
  
• 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?
  
• How are sigma and pi bonds form?
  
• Question #1d33e
  
• 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)#?
  
• How many grams of nitrogen dioxide must react with water to produce #5.00*10^22# molecules of nitrogen monoxide?
  
• How do you find the derivative using limits of #f(x)=3x+2#?
  
• What is the balanced chemical equation for magnesium hydroxide and hydrochloric acid?
  
• What is the general electron configuration for noble gas atoms?
  
• Question #25959
  
• An orbital with #l = 0# is what type of orbital? What shape does it have? How many total orbitals does this type have for each principal energy level?
  
• Question #88966
  
• 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?
  
• How many grams of Ta are there in #6.022 x 10^24# atoms of tantalum?
  
• How many valence electrons does each atom in the alkali earth metal family have?
  
• What is the basic formula of an oxidation reduction reaction?
  
• Does a negative #DeltaH# correspond to an endothermic or exothermic process?
  
• Question #39bd1
  
• 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 ?
  
• Question #ae614
  
• What happens to electrons when a polar covalent bond forms?
  
• What is the formula and molar mass of beryllium chloride?
  
• What are three elements that form only one cation?
  
• What is a bond between a positive and a negative ion called?
  
• How do solutions differ from heterogeneous mixtures? Other classes of matter?
  
• Question #7037e
  
• Question #cf092
  
• What would cause an atom to have a high electronegativity value?
  
• 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 would you draw the chloroform molecule (#CHCl_3#)?
  
• Question #00aba
  
• Do sigma bonds overlap?
  
• What is electron configuration of fluoride ion?
  
• What causes shielding effect?
  
• Would these orbital descriptions be atomic or hybrid orbitals? s, p, d, f, #sp^2#, #sp^3#