Question A new indicator was found, at pH values less than 7.5 the indicator is blue and at values greater than 9.5 it is grey. What is the approximate pKa for this indicator?

Number 2 Please V-21 EXPERIMENT V: VOLTAIC CELLS, AND THE NERNST EQUATION POSTLAB ASSIGNMENT Name Gabriele Romane Lab Period Lab Room TA Mudhusudan (haud bery Show your work - answers without supporting work will get zero marks. Units and the correct number of significant figures are required. Graphs must conform to the Guidelines on Graphing in the front part of this Manual. Part I Cell potentials at standard conditions 1. Assume that the Cu2+ + 2e → Cu half reaction has an electrode potential of 0.34 volts as indicated on the line scale below (1 division = 0.1 volt). Use your results to place as many of the other half-cells as you can on the same line scale. (1 mark) TowCu? + Falat Aglagt co-sov Znt/2n 6.0 -0.76V volts (0.34 V) -0.84V 1 division=0.1 V 2. (1 mark) Use your results to create in the space below a Displacement Series. Write the reduction half-reaction in each case. You may use either Scheme A or Scheme B. Label the best reducing agent and the worst reducing agent (as on p. V-2 and V-4). Include the three metals that were used and the two halogens (include bromine from part II). Note that you cannot definitely place silver with respect to bromine from your results. Displacement Series following Scheme a. b. c. d. e. (Questions continue on the next page) V-25 OBSERVATIONS SHEET - EXPERIMENT V Voltaic Cell and the Nernst Equation Part I: Electrode Potentials You only have to record positive readings. If reading is negative, reverse the leads. The zero point value was out by 0.00 volts. Electrode A Electrode B Ecell Which is the positive electrode? Ag|Agt 0-210 AgAg+ (12, 135, 1) CuCu2+ Zn/Zn2+ 0.484 Ag|Ag 1.583 Silver Silver silver Copper greephite Cu Cu2+ Zn/Zn2+ 1.109 CuCu2+ (12, 135, 1) 0.258 1.380 ZnZn2+ (12, 13, 1) Graphite Ordering the reactions in this way forms a Displacement Series (sometimes called an Activity Series). The reaction with the best reducing agent is at the top and the worst at the bottom. Note that the direction of the ordering is arbitrary. We could just as well have ordered these reactions as (Scheme B): (Cu2+ is a better oxidizing agent) Cu2+ + 2e Cu (Cu is a poorer reducing agent) 2H+ + 2e H2 介 (Zn2+ is a poorer oxidizing agent) Zn2+ + 2e → Zn (Zn is a better reducing agent)

solve using Buckingham-pi Theorem 8-19. The force of buoyancy F is a function of the volume +of a body and the specific weight y of the fluid. Determine how F is related to ť and y.

The table below shows the monthly cost of producing vintage model cars for collectors for quantities O, 100, 200, and 500. Complete the table by filling in the average fixed cost, average variable cost, and average total cost. Instructions: Round your answers to 2 decimal places. Average Fixed Cost (dollars) Average Variable Cost (dollars) Average Total Cost (dollars) Vintage Model Car Production Costs Total Fixed Total Variable Output Cost (dollars) Cost (dollars) 0 $1,500 $0 100 1,500 600 200 1,500 1,100 500 1,500 4,150 Total Cost (dollars) $1,500 2,100 2,600 5,650

Assume that in October 2022 the Schmidt Machinery Company (Exhibit 14.1) manufactured and sold 990 units for $705 each. During this month, the company incurred $415,800 total variable costs and $180,400 total fixed costs. The master budget data for the month are as given in Exhibit 14.1. Required: 1. Prepare a flexible budget for the production and sale of 990 units. 2. Compute for October 2022: a. The sales volume variance, in terms of operating income. Indicate whether this variance was favorable or unfavorable. b. The sales volume variance, in terms of contribution margin. Indicate whether this variance was favorable or unfavorable. 3. Compute for October 2022: a. The total flexible budget variance. Indicate whether this variance was favorable or unfavorable. b. The total variable cost flexible budget variance. Indicate whether this variance was favorable or unfavorable. c. The total fixed cost flexible budget variance. Indicate whether this variance was favorable or unfavorable. d. The selling price variance. Indicate whether this variance was favorable or unfavorable. Comparison of Actual and Budgeted Operating Income SCHMIDT MACHINERY COMPANY Analysis of Operating Income For October 2022 (1) Actual Operating Income (2) Master Budget (3) Variances Units 780 1,000 220 U* Sales $ 639,600 100% $ 800,000 100% Variable costs 350,950 55 450,000 56 $ 160,400 U 99,050 F** $ 61,350 U 10,650 U Contribution margin 45% 44% $ 288,650 160,650*** $ 350,000 150,000+ Fixed costs 25 19 Operating income $ 128,000 20% $ 200,000 25% $ 72,000 U *U denotes an unfavorable effect on operating income. **F denotes a favorable effect on operating income. ***Actual fixed factory overhead cost = $130,650; actual fixed selling and administrative costs = $30,000. Budgeted fixed factory overhead cost = $120,000; budgeted fixed selling and administrative costs = $30,000. Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Prepare a flexible budget for the production and sale of 990 units. Units sold ales Fixed costs Variable costs Required 1 Required 2 > Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Compute for October 2022: a. The sales volume variance, in terms of operating income. Indicate whether this variance was favorable or unfavorable. b. The sales volume variance, in terms of contribution margin. Indicate whether this variance was favorable or unfavorable. Show less A Sales Volume Variance Operating income Contribution margin < Required 1 Required 3 > Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Compute for October 2022: a. The total flexible budget variance. Indicate whether this variance was favorable or unfavorable. b. The total variable cost flexible budget variance. Indicate whether this variance was favorable or unfavorable. c. The total fixed cost flexible budget variance. Indicate whether this variance was favorable or unfavorable. d. The selling price variance. Indicate whether this variance was favorable or unfavorable. Show less a. The total flexible budget variance b. The total variable cost flexible budget variance c. The total fixed cost flexible budget variance d. The selling price variance < Required 2 Required 3

Consider 3 energy levels in an atom (not a hydrogen atom), with E1 < E2 < E3. A transition from E3 to E2 emits a photon with λ = 694.6 nm, and a transition from E3 to E1 emits a photon with λ = 368.6 nm. Find the wavelength of light that would be emitted when an atom undergoes a transition from E2 to E1 emits.

then the test is right tailed/ left/ two tailed would suggest the statistic is/ is not significant When conducting a significance test for correlation, if your null and alternative hypothesis are: Ho:p=0 H₁:p>0 Then the test is: Select an answer If we reject the null hypothesis, that would suggest the statistic is significant. Question Help: Message instructor Add Work Submit Question