an expression that gives the rate of a reaction as a function of concentrations; often called the rate law. elementary step. a reaction whose rate law can be written from its molecularity. enthalpy of hydration. the enthalpy change associated with placing gaseous molecules or ions in water; the sum of the energy needed to expand the solvent and ...d [N2O4]. A sample of acetone is placed into a container. The container is sealed and attached to a pressure sensor, as shown in the diagram above. The container is allowed to sit on the lab table for a few minutes as the pressure in the container is monitored at regular intervals. At the end of 2.00 minutes, some acetone liquid remains in the container. Which of the following best explains ...A The carbon-to-carbon bond on the left is stronger because it is a double bond. 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Members Online. ap chemistry unit 9 progress check frq upvotes · comments. r/APChem. r/APChem ...fission. process in which a larger nucleus splits into two or more fragments, roughly equal is size, releasing energy; protons and neutrons split from nucleus of an atom; used for nuclear reactors and nuclear bombs. fusion. process in which smaller nuclei combine to form larger nuclei, also releasing energy; protons and neutrons added to the ...To test the claim, a random sample of 50 workers from the agency were given a typing test, and the average typing speed was 58.8 wpm. A one-sample t-test was conducted to investigate whether there is evidence that the mean typing speed of workers from the agency is less than 60 wpm. 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These materials are part of a College Board program.A review of Unit 7 of AP Chem (5-6 in notes) Learn with flashcards, games, and more — for free.The growing imperial rivalries among European states (The rivalry between Russia and Britain in Asia, known as the "Great Game," was a source of military and diplomatic tensions between the two nations prior to the First World War. These tensions prevented Great Britain and Russia from forming an alliance until after Bismarck had been forced from office in 1890 and German foreign policy became ...