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A first-order decay process for a radioactive isotope is shown below.  Which figure shows the composition at 12 years?

The change in temperature from 10 °C to 20 °C is found to double the rate of a particular chemical reaction. How did the change in temperature affect the reaction?

Consider the reaction potential energy diagram. What describes the catalyzed forward reaction pathway?

What classifies a substance as an Arrhenius base?

For the reaction of                                            CH3NC(g) ⇌ CH3CN(g)                    Kc = 11 What is the equilibrium concentration of CH3CN if the flask initially contains only 0.56 M CH3CN?

Which process would have the largest value of ΔS°?

Given the reaction and data found in the table, what is the value of Kc?   2H2O2(g)  2H2O(g) + O2(g)   Chemical species Equilibrium concentration / mol∙L–1 H2O2(g) 0.00735 H2O(g) 1.35 O2(g) 1.01    

What is the percent composition by mass (g/g) of a 1.25 m NaCl solution?  The molar mass of NaCl is 58.44 g∙mol–1.  

The normal peak systolic velocity for the ulnar artery is typcally:

In a redox-reaction, the substances that take electrons from other substances are called