Answers edited by Simon Moore

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