Answers edited by McWilliams

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• What is the concentration in parts per million of a 500 g sample of drinking water that contains 45 mg of lead?
  
• 1)how many grams of C6H5CO2H are produced from 8.00 x 10^25 atoms of oxygen? 2)If 2.6g of C6H5CH3 and 3.2g of O2 are allowed to react which will be limiting? 3)how many moles of C6H5CO2H will be formed(theoretical yield)?
  
• Question #4d7ed