Chemistry, 02.10.2021 14:00 dezmondpowell
Help pl What conclusions can you draw about how water’s movements can change the earth’s surface features? Write an evidence-based claim.
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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.)
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Chemistry, 22.06.2019 18:00, tatemelliott
Which three statements represent the benefits of performing experiments using computer simulations?
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Chemistry, 22.06.2019 22:30, brianna5626
How do limiting factors most affect population size? ostop population growthrestrict population growthincrease population sizeresult in positive impactso
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What conclusions can you draw about how water’s movements can change the earth’s surface f...
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