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Phosphoric acid, a mild acid used among other things as a rust inhibitor, food additive, and etching agent for cavity repair by dentists, can be made from elemental phosphorus in a two-step process. In the first step, phosphorus and oxygen react to form diphosphorus pentoxide: P4(s)+  5O2(g)→  2P2O5(g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid H3PO4:   P2O5(g)+  3H2O(l)→  2H3PO4(l) Suppose the yield of the first step is 97.%  and the yield of the second step is 92.%. Calculate the mass of phosphorus required to make 7.0kg of phosphoric acid. Be sure your answer has a unit symbol, if needed, and is rounded to  2 significant digits.

Phosphoric acid, a mild acid used among other things as a rust inhibitor, food additive, and etching agent for cavity repair by dentists, can be made from elemental phosphorus in a two-step process. In the first step, phosphorus and oxygen react to form diphosphorus pentoxide: P4(s)+  5O2(g)→  2P2O5(g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid H3PO4:   P2O5(g)+  3H2O(l)→  2H3PO4(l) Suppose the yield of the first step is 97.%  and the yield of the second step is 92.%. Calculate the mass of phosphorus required to make 7.0kg of phosphoric acid. Be sure your answer has a unit symbol, if needed, and is rounded to  2 significant digits.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Phosphoric acid, a mild acid used among other things as a rust inhibitor, food additive, and etching agent for cavity repair by dentists, can be made from elemental phosphorus in a two-step process. In the first step, phosphorus and oxygen react to form diphosphorus pentoxide: P4(s)+  5O2(g)→  2P2O5(g)

In the second step, diphosphorus pentoxide and water react to form phosphoric acid H3PO4:

 

P2O5(g)+  3H2O(l)→  2H3PO4(l)

Suppose the yield of the first step is 97.%  and the yield of the second step is 92.%. Calculate the mass of phosphorus required to make 7.0kg of phosphoric acid.

Be sure your answer has a unit symbol, if needed, and is rounded to 

2 significant digits.

 

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