Answers edited by Simon Moore

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• What is the difference between an electrophilic substitution reaction and a nucleophilic substitution reaction?
  
• Why are resonance structures necessary?
  
• What is the highest point on earth?
  
• Why is cholesterol in the blood?
  
• Is combustion a physical or chemical change? Why?
  
• Is uranium a fossil fuel?
  
• What is laughing gas called? ?
  
• Why is an alkyl group is denoted by #"R"#?
  
• One solution contains 55 g #NaCl # per liter. and another contains 55 g #KCl# per liter. Which solution has the higher molarity? How can you tell?
  
• Question #42299
  
• Question #ebf5e
  
• Question #73746
  
• Question #2a118
  
• What is an example of a colloid?
  
• Question #c2f50
  
• Question #0ae32
  
• Is there a membrane that stop liquid water but let Methane gas in?
  
• Silver emits light of 328.1 nm when burned. What is the energy of a mole of these photons?
  
• Question #1e971
  
• What is the pH of a #1*10^-5# #M# solution of sulfuric acid?
  
• Question #f678c
  
• How can I explain the enthalpy of a system?
  
• Question #39df6
  
• Question #147e5
  
• What are the products when Alka Seltzer dissolves in water? Is it water and carbon dioxide, i'm not really sure with that
  
• What is the difference between compounds and mixtures?
  
• All of the reagent solutions have a concentration of 0.2 M. This means that there is 0.2 mole of dissolved substance per liter of solution. What will be the concentration after mixing, assuming you use equal volumes of each solution?
  
• Why can't we react francium with water?
  
• What is the name of the compound # P_2O_5#?
  
• Why alkenes called olefins?
  
• Question #ece79
  
• Why does the Antarctic have a large hole in the ozone, when no one even lives there?
  
• How does the mass of the substance effect the specific heat value?
  
• Question #a9349
  
• How do you convert 2 tons to grams?
  
• What volume of a #1.5*mol*L^-1# solution is required to deliver a #3.0*mol# quantity of solute?
  
• What is a neat liquid?
  
• Question #80627
  
• Does pure water have more H+ ions than OH- ions?
  
• What is formal charge and how is it determined?
  
• Consider a mixture of water, sand, and oil. How many phases are present? How could you separate mixture into individual substances?
  
• Question #8af18
  
• Question #af560
  
• The half-life of cobalt-60 is 5.2 years. Find the time it would take for a sample of 0.5 grams to decay to 0.1 gram?
  
• Question #2a46a
  
• What's one thing you like about Socratic?
  
• How much energy (in joules) is required to raise the temperature of 200g of liquid water from 20c to 50 c?
  
• Woollen clothes are biodegradable but nylon clothes are not. Why do you think is the case?
  
• When you blow air into a balloon, not only there will be increase in it's pressure but also it's volume. Is it a violation of Boyle's law?
  
• What are some examples of colloids and suspensions?
  
• On a mountaintop, it is observed that water boils at 90°C, not at 100°C as at sea level. Why does this phenomenon occur on the mountaintop?
  
• Question #68599
  
• Any 3 reasons for profuse use of plastics although it is harmful?
  
• Is a suspension a homogeneous or a heterogeneous mixture?
  
• How does plastic benefit and harm the environment?
  
• What safety equipment should always be used when working with glass or chemicals?
  
• Question #2d155
  
• A #"standard solution"# is #"aqueous"#, #"unsaturated"#, #"a mother solution"#?
  
• What are the differences between hydration, hydrolysis and condensation?
  
• What is indicated by the #methyl-# prefix?
  
• Question #b65fa
  
• What are the advantages and disadvantages of emulsion polymerization as compared to bulk and solution polymerization?
  
• Can a rubbing alcohol conduct electric current?
  
• Question #87757
  
• Why do bases feel slick in nature?
  
• What volume of concentrated #HCl# contains a mass of #125*g# #HCl#?
  
• Question #f92a2
  
• Question #ce94f
  
• Question #ffab1
  
• How many grams of water could be made from 5.0 mol #H_2# and 3.0 mol #O_2#?
  
• Does pure water have a concentration?
  
• Question #5f334
  
• Question #edc6b
  
• Why do bases feel slippery?
  
• How can you can tell the difference between a solution and a clear colloid?
  
• What states of matter can flow?
  
• Question #3c6f1
  
• Question #e788e
  
• How would I convert the following to ppm? 3 grams of lead found in 30kg of soil.