Chemistry, 04.07.2019 14:30 Roastedham1272
Many microorganisms are beneficial in different ways. which one these is not an example of a beneficial microorganism? a) bacteria b) fungi c) virus d
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Chemistry, 21.06.2019 15:30, ashtonbillups
Is this a scientific model? use complete sentences to explain why or why not. a graphic organizer showing the water cycle
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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
Many microorganisms are beneficial in different ways. which one these is not an example of a benefic...
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