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Chemistry, 08.04.2021 15:40 victoria8281
Which of the following is a purpose for which stoichiometry(stoic) is used? *
A) Stoic is used to determine the amount of time a reaction takes
B) Stoic is used to determine the reactivity of different elements
C) Stoic is used to determine the amount of product produced in a reaction
D) none of the above
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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
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Which of the following is a purpose for which stoichiometry(stoic) is used? *
A) Stoic is used to d...
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