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Chemistry, 03.07.2019 06:00 101EXPERIENCE
According to the kinetic molecular theory, which of these statements is not true? a. there is no attraction between particles of a gas. b. only particles of matter in the gaseous state are in constant motion. c. the particles of a gas collide with each other and with other objects. d. most of the volume of a gas is just empty space.
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Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?
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Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) β h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 Β°c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
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According to the kinetic molecular theory, which of these statements is not true? a. there is no at...
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