Chemistry, 28.08.2019 21:30, kimezzell18
Which statement about one atom of an element identifies the element
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Chemistry, 22.06.2019 11:30, ayoismeisjjjjuan
Which statement best describes the flow of energy in this scenario
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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 12:30, AlexRavenwood127
What metric units would you use to measure the thickness of a key
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Which statement about one atom of an element identifies the element...
Mathematics, 06.05.2020 05:35
Mathematics, 06.05.2020 05:35
Mathematics, 06.05.2020 05:35