Which of the following is a balanced chemical equation:   3Cu + 8HNO3 -> 2Cu(NO3)2+2NO+4H2O   P4H10 + 5H2O -> 4H3PO4   2HCl + 2CaCO3 -> CaCl2+H2O+CO2   Be2C+4H2O->Be(OH)2+CH4

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Which of the following is a balanced chemical equation:

 
  1. 3Cu + 8HNO3 -> 2Cu(NO3)2+2NO+4H2O

     
  2. P4H10 + 5H2O -> 4H3PO4

     
  3. 2HCl + 2CaCO3 -> CaCl2+H2O+CO2

     
  4. Be2C+4H2O->Be(OH)2+CH4

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