4. What is the equilibrium constant of this reaction at 25 °C? 5. After 56.0 hours at 1.04 A, how many moles of electrons have been used in this reaction? 6. Predict the sign of the entropy (ASrxn) for this electrochemical reaction. Explain your reasoning.

Please answer number 4-8

List 10 thesis titles related to chemistry.   Please suggest 10 unique topics.

Write your complete solutions on yellow paper, round your answers to the appropriate number of significant figures, and box the final answer. The deadline for submission is at the end of the class. Note: You do not need to write your solutions for the items that can be derived from your calculators. 1. Three students (Saerom, Hayoung, and Jiwon) are asked to determine the ppm Ca in a drinking water sample by titration with EDTA. Each student performed five trials for the sample. The results in ppm Ca are the following: Saerom Hayoung Jiwon a. Get the mean, SD, and % RSD of each student's results. b. If the true value is 35 ppm, calculate the relative error of each student's results. c. Comment on the precision and accuracy of each student's results. The maximum % RSD and the relative error set by the lab is 5.0%. d. Use the following table to summarize your answers. Mean SD %RSD Relative Error Comment 31, 32, 33, 33, 32 35, 34, 34, 35, 34 35, 38, 33, 35, 37 Saerom Mean SD 95% CI…

1 Chemistry Time's Up! What is the number of moles of glucose (C₂H₂O) in 0.500 L solution? ADD FACTOR 1-210 Sections HA LECTU X 0.20 0.500 mL ANSWER 0.020 36.04 1.3 M glucose g glucose mol glucose MacBook Air 1 180.18 of a 0.40 6.022 x 1023 L M RESET PUL C 0.40

STARTING AMOUNT esc C X C 2 F2 W # 3 1000 F3 ADD FACTOR x( ) $ 4 1 97.9 FS de in % 5 2 Convert 23.4 kJ to calories 2.34 x 104 t 4184 kcal 6 P 0.001 J 4.184 COMEC DOLL ANSWER & 7 9.79 × 104 cal 00 8 RESET FO 2 23.4 ( 5590 A FIT 120 Jan 21 del +

1. (answer the questions in the tan boxes in the tables below each question) A student conducted an investigation to determine the effect of water temperature on the amount of sugar that dissolves in a beaker of water. Identify components for trial 1 of this investigation. Beaker Number 1 2 3 4 Amount of Water (mL) 100 100 100 100 Amount of Water (mL) Trial 1 Temperature of Temperature of Amount of Sugar Sugar (°C) Water (°C) Dissolved (g) 20 20 20 20 Temperature of Sugar 5 10 15 20 185 189 194 204 Temperature of Water Terms Variable Constant Amount of Sugar Dissolved

Concentration (M) 1 0.8 0.6 0.4 0.2 0 0 1st attempt 10 y = -0.0111x + 1.0362 20 30 Time (minutes) What is the y-intercept of this graph? 40 50 60

HP TrueVision HD 4 Texas Workfor Mộc Homework × W. College Physic mical App AN Careers eagleonline.hccs.edu/courses/188795/assignments/3601808 valnabie diler reD 4 dl 10.1Tam Constants | Periodic Table Part O Complete the fourth row. Complete the following table by calculating the missing entries and indicating whether the solution is acidic or basic. Express your answer using two decimal places. Acidic or [H+] [OH-] pH pOH basic? 7.4x10-3 ΑΣφ 3.3x10-10 M pH 8.25 5.73 Is to fa ho II 10 insert

4-16. Zinc is an essential micronutrient in pet food, but is toxic if present in excess. Do the Zn concentrations (mg/g) for the five cat foods and two dog foods determined by two methods differ significantly at the 95% confidence level? Cat 1 Cat 2 Cat 3 Cat 4 Cat 5 Dog 1 Dog 2 Old method: bris 8 Я 84.9 73.5 173.0 62.7 154.0 80.1 185.0 New faster method: 86.2 81.8 186.0 73.4 138.0 72.5 203.0 SO Souza, S. S. L. Costa, R. G. O. Araujo, C. A. Cats and