PLEASE HELP ! Question 1
Recall all the models you described in task 1. Think about the results each model would predict for the
experiment with hydrogen gas. Which models of the atom does the experimental evidence support?
Explain why these models are compatible with the experimental results.

If a solution had a ph of 7 what is the solution

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.