1. a student has a petri dish packed with a layer of marbles. which of the following activities should the student perform to demonstrate phase transition from solid to liquid? a.) removing a few marbles from the petri dish and stirring the rest around as energy is added b.) removing a few marbles from the petri dish and stirring the rest around as energy is removed c.) removing all but two marbles from the petri dish and shaking them vigorously as energy is added d.) removing all but two marbles from the petri dish and shaking them vigorously as energy is removed 2. a hot air balloon has an air vent that keeps the air pressure inside and outside the same. allen observes that a hot air balloon rises up when the gas molecules inside it are heated. which of the following laws is used to understand the behavior of the gas and why? a.) the high temperature brings the gas molecules closer together according to charles's law because this law describes how a gas will behave at constant pressure. b.) the high temperature makes the gas molecules spread apart according to charles's law because this law describes how a gas will behave at constant pressure. c.) the high temperature lowers volume according to boyle's law because this law describes how a gas will behave when the number of moles remains constant. d.) the high temperature raises volume according to boyle's law because this law describes how a gas will behave when the number of moles remains constant.
Answers: 1
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100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.
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Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3
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1. a student has a petri dish packed with a layer of marbles. which of the following activities shou...
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