Consider this reaction:
2H3PO4(aq) –> P2O5(aq) + 3H2O(aq)
At a certain temperature it obeys this rate law.
rate = (16.9 M^-1 .S^-1)[H3PO4]^2
Suppose a vessel contains H3PO4 at a concentration of 0.770 M. Calculate how long it takes for the concentration of H3PO4 to decrease by
90.0%. You may assume no other reaction is important.
Round your answer to 2 significant digits.

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.

Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12