Chemistry, 04.06.2021 15:10 lexibyrd120
Which statement is correct about curves B and C?
B represents hot gas and C represents gas at room temperature.
B represents gas at room temperature and C represents hot gas.
B represents gas at room temperature and C represents cold gas.
B represents cold gas and C represents gas at room temperature.
Answers: 2
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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.)
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Answers: 2
Which statement is correct about curves B and C?
B represents hot gas and C represents gas at room...
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