Answers edited by Simon Moore

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