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Chemistry, 18.12.2020 09:50, jhashknkughb6759
Which element is the only one in the universe that has only 1 proton?
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Answers: 1
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Chemistry, 22.06.2019 05:30, jzjajsbdb8035
Which other elements contain the same number of outer electrons as sodium
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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 element is the only one in the universe that has only 1 proton?...
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