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Chemistry, 22.06.2019 04:30
In which phase(s) do the molecules take the shape of the container?
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Chemistry, 22.06.2019 11:40
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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Chemistry, 22.06.2019 16:50
Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest
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Chemistry, 22.06.2019 20:30
The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?
Answers: 3
Mathematics, 13.12.2019 15:31
Mathematics, 13.12.2019 15:31
History, 13.12.2019 16:31
Mathematics, 13.12.2019 16:31
History, 13.12.2019 16:31
History, 13.12.2019 16:31
History, 13.12.2019 16:31
History, 13.12.2019 16:31
Mathematics, 13.12.2019 16:31
History, 13.12.2019 16:31