Chemistry, 18.11.2020 17:30 austinmiller3030
Which of the following is a method used by atoms to form a chemical bond?
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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 15:30
The identities of substances are the same before and after which type of change
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Chemistry, 22.06.2019 15:50
Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?
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Which of the following is a method used by atoms to form a chemical bond?...
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