Questions asked by Elle C.

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• Prove # (secX-tanX)/(secX+tanX) = 1-2secXtanX+2tan^2X#?
  
• A 1.30g sample of Lead(II) Hydroxide was reacted with 50 mL of 0.250 mol/L Hydrochloric Acid to form a solid precipitate. How much solid precipitate should be formed? (Ans: 1.50g)
  
• What is the pH of a 0.10M solution of HC2H3)2 that dissociates 5.8%? (ans: 2.24)
  
• Name one chemical property of carbon monoxide and link it to one of its health or environment affects?
  
• Prove the trig identity?
  
• Prove this identity?