In a lab simulation, students investigated the decomposition of hydrogen peroxide catalyzed by iodide ion 2H2O2(aq)       → 2(lH2O (l)     +      O2 (g)   They were given the following proposed reaction mechanism: Step 1: H2O2+I−→H2O+OI−\text{H}_2\text{O}_2 + \text{I}^- \rightarrow \text{H}_2\text{O} + \text{OI}^-  Step 2: H2O2+OI−→H2O+O2+I−\text{H}_2\text{O}_2 + \text{OI}^- \rightarrow \text{H}_2\text{O} + \text{O}_2 + \text{I}^- Student A made the following claim: “The iodide ion acts as a catalyst because it appears in the first step and disappears in the second.” Student B replied: “That can’t be right. The species that shows up in one step and is consumed in a later one without appearing in the overall reaction is actually the intermediate.” Based on their conversation, identify which species behaves as an intermediate in this mechanism.  Justify  

These were young women of the 1920s whose rebellion against prewar standards of femininity included wearing shorter dresses, bobbing their hair, dancing to jazz music and driving cars.

Federal legislation intended to favor northern and western European immigrants over those from southern and eastern Europe by restricting the number of immigrants from any one European country to 2 percent of the total number of immigrants per year, with an overall limit of slightly over 150,000 new arrivals per year.

Modernism is described as an intellectual, literary and artistic movement that first appeared in the capitals of Europe in the 1890s, and spread to the United States by the 1920s, especially to cities like New York and Chicago.

The WPA (Works Progress Administration) was a government agency established to manage several federal job programs created under the New Deal; it became the largest employer in the nation. 

From the video, the Spanish-America War, where did the war begin?

CHOOSE ALL THAT APPLY.  The new wave of immigrants to the United States in the late nineteenth century experienced the following:

CHOOSE ALL THAT APPLY. John Maynard Keynes economic theory proposed the following:

In 1898, the United States annexed this territory over the protests of the indigenous inhabitants who resented their nation being annexed “without the consent of the people.”

During the 1870s – 1890s, Government took an active role in assisting labor and supporting workers.