Questions asked by Amanda

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• Let's say you calculate the electronegativity difference between N and Cl, based on where that value falls on the Bonding Spectrum Scale, how could you predict whether the bond would be ionic, polar covalent, or non-polar covalent?
  
• Correct the errors in the following? a) #1s^2 2s^3 2p^7# b) #1s^2 2s^2 3p^6 3s^2 3d^8# c) #1s^3 2s^2 2p^6 3s^2 3p^5 4s^1# d) #1s^1 2s^2 2p^6 3s^2 3p^6 3d^7#
  
• Complete the following equations? a)
  
• Complete the following equation?
  
• Convert 87.69 kJ/g into k/mol?
  
• The mass of MgO is 1.04 g in a reaction. How many moles of MgO were used?
  
• 0.036 kJ of energy is released in a reaction involving 1.04 g of MgO. Convert the 0.036 kJ of energy into kJ/mol MgO using ΔH=Q/n?
  
• What is the balanced equation for the combustion of pentane gas (C5H12)?
  
• At 25oC, the value of Kc for the following reaction is 82. 𝐼2(𝑔) + 𝐶𝑙2(𝑔) ⇌ 2𝐼𝐶𝑙(𝑔) 0.83 mol of I2(g) and 0.83 mol of Cl2(g) are placed in a 10 L container at 25oC. What is the concentration of the three gases at equilibrium?
  
• A beaker contains 100.0 mL of distilled water. We add 0.10 g of KOH. What is; a. the concentration of H+ ions? b. the pH of the solution?
  
• Calculate the volume of Mg(OH)2 at 0.20 M necessary to neutralize 300.0 mL of H3PO4 at 0.30 M in a titration lab?
  
• For the Hall-Héroult process, how would you determine the two half-reactions (anode and cathode) which make up this process, complete with electrons? Also by balancing the half-cells and determining how the net-ionic equation is obtained?
  
• What are the two products that result with adding salicylic acid to ethanol?
  
• #"H"_3"C"-"C"="CH" + "HBr" -> #?
  
• Show the complete esterification of the following pairs of reactants and name the ester product. Be sure to draw the structures of all reactants and products? a) ethanol & benzoic acid
  
• What is the most likely product to form when 4-methyl-1-pentene reacts with excess Br2? Please show the structural formula. What type of reaction is this?
  
• What are the [H+] and [OH–] for a 0.0025 M solution of perchloric acid?