At a certain temperature the rate of this reaction is second order in H3PO4 with a rate constant of 10.3 M-1 • s-1.
2H3PO4 (aq) → P2O5 (aq) + 3H2O (aq)
Suppose a vessel contains H3PO4 at a concentration of 1.29 M. Calculate the concentration of H3PO4 in the vessel 1.00 seconds later. You may assume no other reaction is important.
Round your answer to 2 significant digits.
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