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Chemistry, 22.06.2019 06:00, momof7hardings
When would a bouncy ball have the most potential energy
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Chemistry, 22.06.2019 11:40, Wemaybewrong
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.)
Answers: 1
Chemistry, 22.06.2019 14:00, MathChic68
Displacement is the slope of a velocity vs. time graph a. true b. false
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Chemistry, 22.06.2019 22:30, gonzalesalexiaouv1bg
What if it is did darwin used to support his theory of evolution
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Pair up the nucleotide bases with their complementary partners....
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