Finding half life and rate constant from a graph of concentration versus... chemical engineer is studying the rate of this reaction. 2H3PO4(aq) → P₂O5 (aq) +3H₂O (aq) He fills a reaction vessel with H3PO4 and measures its concentration as the reaction proceeds. Here's a graph of his data: ? 0.20- (W) [³od³H] 0.15- 0.10 0.05 0 0.02 0.04 0.06 0.08 0.10 t (s) Use this graph to answer the following questions: What is the half life of the reaction? ☑ 11/2 = ☐ s S ☐ x10 Round your answer to 2 significant digits. Suppose the rate of the reaction is known to be first order in H3PO4. Calculate the value of the rate constant k. k = = ☐ Round your answer to 2 significant digits. Also be sure you include the correct unit symbol. Predict the concentration of H3PO4 in the engineer's reaction vessel after 0.200 seconds have passed. Assume no other reaction is important, and continue to [H,PO₁] = M assume the rate is first order in H3PO4. Round your answer to 2 significant digits. o0. 18 Ar