Answers created by Tony T.

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• Question #e64fe
  
• If 1/8 of an original sample of krypton-74 remains unchanged atter 34.5 minutes, what is the half life of krypton-74?
  
• How do you determine pi bonds in a molecule?
  
• What are some ways that plate movements create volcanoes?
  
• What is the spectator ion and net ionic equation of #Zn(s)+Ag_2SO_4(aq)->ZnSO_4(aq)+2Ag(s)#?
  
• Why would you likely not find any fossils in the bedrock if you were hiking up Mt. Marcy in the Adirondack Mountains?
  
• Question #12912
  
• What is a change in the properties of matter that does not change the the identity of the substance?
  
• How many protons are present in an atom which has an atomic number of 35?
  
• What resulted when the early atmosphere saw an increase in oxygen?
  
• What is the theory of plate tectonics based upon?
  
• The difference in terms of reflection, between objects that appears yellow and objects that appears blue?
  
• In an ionic bond, the atom with the highest electronegativity will always form what type of bond?
  
• Question #3f09f
  
• How do you graph 2x-y=4 using a table of values?
  
• What is the molecular formula of a substance that decomposes into 133 g of H and 21.3 g of O, and was found to have a molar mass of 34.1 g?
  
• Can someone compare s, p, d, and f orbitals in terms of size, shape, and energy?
  
• Question #32f25