Questions asked by Ali

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• Electronic configuration of Aluminum in excited state?
  
• How can we identify the number of group from electronic configration of any element if it ended in 3d^8 4S^2 I know group no. = total no. of valence but whats the valence here in this situation?
  
• In a fraction, what is the name in English for the top number and the bottom number?
  
• How to complete this reaction? HNO3 + H2O ?
  
• The concentration of a solution of ammonia, #"NH"_3# is #"1.5% m/v"#. What is the molar concentration of a solution produced by diluting #"25.0 mL"# of this solution with #"250 mL"# of water?
  
• #"1.50 mL"# of a #"0.0500-M"# solution of calcium chloride, #"CaCl"_2#, was diluted with water to a volume of #"10.0 L"#. What is the concentration of #"Cl"^(–)# ions in the diluted solution in ppm?
  
• Can any body tell me why NAOH cant considered as a primary standard? please provide an equation to the answers thanks
  
• Am I allowed to open these brackets of t the angle?
  
• Calculate the amount of energy released when 3.60 kg of butane (C4H10) is burnt in an unlimited supply of oxygen.?
  
• Is every four side shape consider as a parallelogram?
  
• How to solve for #x# in #sin(2x-pi/3)=1/2#?
  
• Show that sin θ + i cos θ = cis π 2 − θ  .?
  
• In the sentence, do I say: this will make the reader think that the ball is red or this will make the reader THINKS....?
  
• Why can we not disposal the ethanol in the drain?