Chemistry, 04.09.2019 20:30, JKINGblackstar3502

The alchemical, medical, and technological traditions were precursors to chemistry. state a contribution that each made to the development of the science of chemistry.

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Chemistry, 21.06.2019 21:00, david838843

Iwll give extra points to who gets this for ! what type of reaction is this? ?

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Chemistry, 22.06.2019 06:00, girly37

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

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Chemistry, 22.06.2019 09:30, jewelz5887

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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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The alchemical, medical, and technological traditions were precursors to chemistry. state a contribu...