Chemistry, 19.07.2021 20:00 lillygon81
D. (3 pts.) Calculate the energy change, frequency, and wavelength of light associated with the
following transitions for the hydrogen atom. Also, please state whether the energy is emitted or
absorbed.
1. n= 3 to n = 5
2. n = 8 to n=4
(PLEASE PLEASE HELP for homework due at 10:30)
Answers: 3
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.)
Answers: 1
Chemistry, 22.06.2019 12:30
Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.
Answers: 2
Chemistry, 22.06.2019 14:30
How does a noncompetitive inhibitor reduce an enzyme’s activity?
Answers: 1
D. (3 pts.) Calculate the energy change, frequency, and wavelength of light associated with the
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