Chemistry, 10.12.2020 02:00 mervesena01
A golf ball is dropped off the side of a building ignore the effects of air resistance as the ball continues to fall freely the kinetic energy of the ball
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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) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °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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Chemistry, 22.06.2019 20:00
What happens to the temperature of a substance when the average kinetic energy of its particles increases?
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Chemistry, 23.06.2019 01:00
Wind and moving water provide energy. chemical mechanical thermal none of the above
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A golf ball is dropped off the side of a building ignore the effects of air resistance as the ball c...
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