Chemistry, 04.01.2021 04:20, jashaikamatuteowwp1p
Does anyone what to talk... im bored... and kinda sad I don't mind talking about anything
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Chemistry, 22.06.2019 11:00, peternice2956
Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.
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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) 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.)
Answers: 1
Chemistry, 22.06.2019 20:50, iluminatioffial9699
One nanometer is equal to how many meters?
Answers: 2
Does anyone what to talk... im bored... and kinda sad I don't mind talking about anything...
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