Questions asked by Aidan K.

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• How do I find ΔHrxn for this reaction?
  
• An elevator is moving upward at a constant speed of 6.6 m/s. At 40 m above the level ground, a tennis ball is shot from the elevator at a speed of 49 m/s and an angle of 48° above horizontal, relative to the elevator. Rel. velocity of the ball to ground?
  
• How do I evaluate this limit using Limit Laws?
  
• A 7.12 g sample of Mg is heated with 1.80 g of Br. All of the Br is used up and 2.07 g of MgBr is produced. What is the mass of Mg that remains unreacted?
  
• How do you find the derivative of the function #R=3W^(2*pi)# at #W=7#?
  
• How do I find a general formula for #f^(n)(x)# if #f(x)=x^-4#?