Answers edited by J W.

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• If Mere an astronaut on the moon drops a hammer from a height of 1.4 meters. How long will it take the hammer to reach the ground if the gravitational acceleration on the moon is (one sixth) of that on earth?
  
• What is absolute deviation?
  
• How do I do this?
  
• How would you prepare 300 mL of 0.750 M KCl?
  
• Why Cu does not reacts with HCl?
  
• The cost for 2 adults and 5 children to eat at a local buffet restaurant is $46.50. The cost for 1 adult and 1 child is $15. What is the cost of a child's meal?
  
• What is the product of #(14m^2n^5)(2m^5)?#
  
• How do you solve #-3| a - 1| = - 15#?
  
• Convert 13 grams of nh3 to particles?