Answers created by Paul T. the science nerd

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• Question #ba857
  
• Question #1730e
  
• How can you chemically coat copper coins with a layer of zinc?
  
• If a gas in a closed container is pressurized from 15.0 atm to 16.0 atm and its original temperature was 25°C, what would be the final temperature of the gas in Kelvin?
  
• Question #54de0
  
• Question #5c0eb
  
• Does heat transfer by convection happen mostly in solids, liquids, or gases?
  
• Is metallic bond between two metals, or is present in one metal?
  
• What is the density of an object having a mass of 8.0 g and a volume of 25 cm ?
  
• How many electrons are in the outermost energy level of an oxygen atom?
  
• Question #5d6c3
  
• Question #60d5d
  
• What law can be used to calculate the number of moles of a contained gas?
  
• Question #75b51
  
• Question #5993f
  
• Question #03662
  
• This is an example of heat transfer by what?
  
• Question #de72a
  
• When carbon forms four covalent bonds, what is the orbital hybridization?
  
• Do elements in the same row across belong to the same period or group?
  
• What is the difference between an element, compound, and molecule?
  
• How does increasing and decreasing the temperature affect the pressure of containe of gas?
  
• How do you define the octet rule?
  
• What is the process by which atomic nuclei spontaneously decay called?
  
• Question #ba5a1
  
• What is the maximum number of electrons that the 3d sublevel may contain?
  
• How many unpaired electrons are in a phosphorus atom?
  
• What is true of all atoms?
  
• Question #d25b6
  
• How could you distinguish an element from a compound?
  
• How do you name the compound #LiCr_2O_7#?
  
• Question #3bfb1
  
• Question #dc3b8
  
• Which process represents oxidation with respect to the metal centre? #"A. "Fe(s)+2HCl(aq) rarr FeCl_2(aq) + H_2(g)# #"B. "FeCl_2(s)+H_2(aq) rarr Fe(s) + 2HCl(aq)# #"C. "Fe(NO_3)_2(aq)+2HCl(aq) rarr FeCl_2(aq) + 2HNO_3(aq)# #"D. "Fe_2O_3(s) + H_2(g)#
  
• Question #6db38
  
• Both of calcium's electrons are in its innermost shell. Why is this?