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Write a balanced equation for the overall cell reaction and calculate the standard cell potential, E^0cell.
A. Half-reactions: Cd^2+(aq) + 2e^- —> Cd(s) Cr^2+(aq) + 2e^- —> Cr(s)
Cell reaction:
E^0 cell
B. Half-reactions: Fe^2+(aq) + 2e^- —> Fe(s) Br2(g) + 2e^- —> 2Br^-(aq)
Cell reaction:
E^0cell
A lead (Pb) pellet having a mass of 26 point 47 g at 89.98 degrees celsius was placed in a constant pressure colorimeter of negligible heat capacity containing 100.p ml of water the water temperature rose from the 22.50 degrees celsius to 23.17 degrees celsius what is the specific heat of the lead pellet?
Write the correct name for each of the following structures.
CH3CH2CH = CHCH2CH2CH = CH2
CH3CH2C = CCH2CH3
Which of the following cells will produce the highest voltage? SHOW YOUR WORK.
a. Mn I Mn^2+ II Zn^2+ I Zn
b. Zn I Zn^2+ II Ni^2+ I Ni
c. Ni I Ni^2+ II Cu^2+ I Cu
Solve separately then write which one will produce the highest voltage.
Using an example (blood glucose), outline the process of hormonal control ?
When the direction of current is from negative to positive terminal of the battery then emf (E) is taken as
(a) positive
(b) negative
(c) zero
(d) normal?
Write a program to calculate students’ average test scores and their grades. You may assume the following input data:
Nondo 85 83 77 91 76
Djiara 80 90 95 93 48
Anna 78 81 11 90 73
Salum 92 83 30 69 87
Moloko 23 45 96 38 59
Job 60 85 45 39 67
Feisal 77 31 52 74 83
Kibwana 93 94 89 77 97
Shomari 79 85 28 93 82
Mayele 85 72 49 75 63
Use three arrays: a one-dimensional array to store the students’ names, a (parallel) two-dimensional array to store the test scores, and a parallel one-dimensional array to store grades. Your program must contain at least the following features: read and store data into two arrays, calculate the average test score and grade, and output the results. Have your program also output the class average.
How would you prepare 400 ml of a 0.24 M NaCl solution (MW = 58.44 g/mole)
Let the probability that a successful rocket launching will be equal to 0.4. Find,
Average number of trials required for the successful rocket launching.
The probability that the successful launching will be made on the third attempt.
The probability that successful rocket launching requires less than 5 attempts.
The program will accept some values from the user and will print out the following
1] Details of the user
• Worker ID – Alphanumeric (2 letters and three digits e.g. EF101) Full Name of the worker.
2] Gross Pay (GP)
• GP = Rate * Hours Worked o Rate is a constant of 11.25 ($11.25 per hour) o Hours Worked to be entered by the user.
3] Deduction
• Union fee o Constant of 50 ($50 per member) o Retirement is 10% of GP
4] Take Home Pay (THP)
• THP = GP – Deduction
