CHEM134 C003 Lesson 7 Quiz | Questions and Answers – spring 2026 | 100% Correct - American Public University.

CHEM134 C003 Lesson 7 Quiz | Questions and Answers —
spring 2026 | 100% Correct - American Public University.

Written: Mar 12, 2023 6:17 AM - Mar 12, 2023 7:22 AM



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Question 1 5/ 5 points

Which of the following is true for the cell shown here?


Zn(s) | zn**(aq) | cr**(aq) | Cr(s)
=1 The electrons flow from the zinc to the chromium.

", The chromium is oxidized.
-7 1 The zinc is reduced.
" The electrons flow from the chromium to the zinc.
" The electrons flow from the cathode to the anode.


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Question 2 5/ 5 points

How many moles of electrons are produced from a current of 17.6 Ain 3.00 hours?

"1 5.47 x 10 mol
",9.33x 103 mol
71 3.35 mol
=, 1.97 mol

~,52.8 mol


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Question 3 5/ 5 points

The measured voltage of a cell in which the following reaction occurs is 0.96 V


Ho(g, 1.0 atm) + 2Ag*(aq, 1.0 M) — 2H*(aq, pH = ?) + 2Ag(s)

Calculate the pH of the H*(aq) solution.

, 827
74
T4
T1149
T154

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Question 4 5/ 5 points

The following reaction occurs in basic solution:


F2+Hy0
— O +F

hen the equation is balanced, the sum of the coefficients is:

s} 13

'7;11
'7,12

“10


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Question 5 5/ 5 points

Given the following notation for an electrochemical cell


Pt(s) | Ha(g) | H'(aq) | Ag*(aa) | Ag(s)
what is the balanced overall (net) cell reaction?


"1 2H"(aq) + 2Ag(s) — Hz() + 2Ag" (aq)
") Ha(g) + Ag*(ag) — H'(aq) + Ag(s)
"1 Ha(g) * 2Ag(s) — H'(aq) + 2Ag*(aq)
"1 2H'(aq) + 2Ag" (aq) — Ha(g) + 2Ag(s)
1 Ha(g) + 2Ag*(aq) — 2H*(aq) + 2Ag(s)

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Question 6 5/ 5 points

Given the following reaction in acidic media:


Fe?* + Cry0;% — Fe3* + cr3*