Answers edited by GreyWolf-X

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• Chlorine gas reacts with sold sodium to form solid sodium chloride Write a balanced chemical equation?
  
• What is the derivative of this function #y=tan^-1(2x^4)#?
  
• 46 is 8% of what number?
  
• Given that #S+12>=20color(white)("d")# determine #color(white)("d")"a) "S;color(white)("d")" b) "S+22# and #"c) "S-8color(white)("d")#?
  
• How do you multiply #\frac { b ^ { 2} - 4b } { b ^ { 2} + 9b + 20} \cdot ( b + 5) #?
  
• Structural isomers of C6H14O ?
  
• Can some one please explain accuracy and precision and when to use them also significant figures? (with examples would be amazing )
  
• How do you solve #\frac { x - 2} { x + 1} + 1= \frac { x - 1} { x + 1}#?
  
• How do you solve #3- 2x \geq - 3#?
  
• What is an independent variable?
  
• *to "get rid" of a fraction multiply by the...?
  
• What is the possible answer for #sqrt2x(sqrt8x-sqrt32)#? How to simplify the answer too?
  
• How does the 3s orbital differ from the 2s orbital?