Vindow Help 100% Tue Apr 20 14:34 Ayemoba Idowu Emmanuel Q A moodle.ciu.edu.tr CHEM 110 - SPRING 2020-2021 MIDTERM EXAM 20/04/2021 - 14:30-15:30 (page 1 of 15) Emmanuel Ayemoba 021 EXAMS / CHEM 110 - SPRING 2020-2021 MIDTERM EXAM 20/04/2021 - 14:30-15:30 A compound contain 5.9265% hydrogen and 94.0735% oxygen has a molar mass 34.01468g/mole. Determine empirical and molecular formula of this compound. Select one: O a. HO, H20 O b. None of them O C. H20, HO d. H202, HO e. HO, H2O2 Next page EM 110-SPRING 2020-2021 QUIZ 1 10/4/2021 - 17:30-18:00 Jump to... week 1 (03.03.21, wednesday, 08.30) Introduction ► 20 étv MacBook Air

Vindow Help 100% Tue Apr 20 14:34 Ayemoba Idowu Emmanuel Q A moodle.ciu.edu.tr CHEM 110 - SPRING 2020-2021 MIDTERM EXAM 20/04/2021 - 14:30-15:30 (page 1 of 15) Emmanuel Ayemoba 021 EXAMS / CHEM 110 - SPRING 2020-2021 MIDTERM EXAM 20/04/2021 - 14:30-15:30 A compound contain 5.9265% hydrogen and 94.0735% oxygen has a molar mass 34.01468g/mole. Determine empirical and molecular formula of this compound. Select one: O a. HO, H20 O b. None of them O C. H20, HO d. H202, HO e. HO, H2O2 Next page EM 110-SPRING 2020-2021 QUIZ 1 10/4/2021 - 17:30-18:00 Jump to... week 1 (03.03.21, wednesday, 08.30) Introduction ► 20 étv MacBook Air

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter11: Properties Of Solutions

Section: Chapter Questions

Problem 109AE: Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray...

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ppm Pb^2+ in 10^-6 % Pb (NO3)2
Stock iron(II) solution (200Ug mL-1 Fe) ferrous ammonium sulfate hexahydrate mass= 0.1437g, transfer it to a 100 ml beaker. add 15 ml approx of water and 15m1 'approx of dilute sulphuric acid (2M H2SO.). then transfer FeII to 100 ml flask makeup to the mark with water. calculate the moles of ferrous ammonium sulfate hexahydrate solution in unit ug/mL.
A. B. and C. already solved (https://www.bartleby.com/questions-and-answers/chemistry-question/a89691d6-2162-4677-b0cc-dc84fcceda08). Please answer E, F and GCircle in pencil in the image on th eirght cide of the diagram is a "2"( Pb(NO3)2 ).
https://cxp.cengage.com/contentservice/assets/owms01h/references/chemtables/gen_chem/eo.html ^ table image:
Beaker 0.00200 M Fe(NO3)3, mL 0.00200 M NaSCN, mL total volume, mL 1 3.000 2.000 10.00 2 3.000 3.000 10.00 3 3.000 4.000 10.00 4 3.000 5.000 10.00 5 (blank) 3.000 0.000 10.00 In solutions 1-4 you are adding 3.00ml of 0.00200M Fe3+ to some SCN- solution and dilutiing to a final volume of 10.00ml. What is the new concentration of the Fe3+ due to dilution? Your answer should have 3 sig figs.
Concentration of AR Stock Solution (ppmppm) 21.22 Unrounded Rounded Concentration of AR Stock Solution (μMμM) 42.7461 42.7
Chemistry (i) For T = 298K ΔG° = -8.314 x 298 x ln (2.83x10-3) = 14.524 KJ/mol (ii) For T = 308.15K ΔG° = -8.314 x 308.15 x ln (9.619x10-3) = 11.891 KJ/mol (iii) For T = 318.15K ΔG° = -8.314 x 318.15 x ln (3.14x10-2) = 9.147 KJ/mol (iv) For T = 328.15K ΔG° = -8.314 x 328.15 x ln (8.82x10-2) = 6.621 KJ/mol (v) For T = 338.15K ΔG° = -8.314 x 338.15 x ln (2.42x10-1) = 3.990 KJ/mol Based on the measured ΔG° values, is this equilibrium spontaneous at room temperature? Which factor, entropy, or enthalpy, has the greater impact on spontaneity in this case? Explain your answers.
Beaker 0.00200 M Fe(NO3)3, mL 0.00200 M NaSCN, mL total volume, mL 1 3.000 2.000 10.00 2 3.000 3.000 10.00 3 3.000 4.000 10.00 4 3.000 5.000 10.00 5 (blank) 3.000 0.000 10.00 In Solutions 1-4 you are adding successively larger volumes of 0.00200M SCN- to the Fe3+ solution and diluting to 10.00 ml. Calculate the final diluted molarity of SCN- in solution #1 Your answer should have 3 sig figs =
https://cxp.cengage.com/contentservice/assets/owms01h/references/chemtables/genChemIndex.html
You were in the middle of a tropical rainforest and it is very humid in the environment. Do you have a glass of pure water that you have left outside for two days. Nothing has come to drink it and it has not rained either for those two days you measure the amount of water in the glass after these two days and it is exactly the same volume that was present two days before answer 22-25
TRUE OR FALSE __________ 6. The bowl of the funnel for gravity filtration may be filled to the brim. __________ 7. Transfer liquids and solutions from a reagent bottle or beaker with the aid of a stirring rod. __________ 8. Never touch, taste, or smell a chemical unless specifically told to do so. __________ 9. If uncertain as to how to dispose of a chemical, dumping it into the sink followed by copious amount of water is a safe disposal procedure. __________ 10. A centrifuge machine should be balanced with an even number of centrifuge/test tubes, placed across the rotor from one another, with equal volumes of liquid.
A core sample is saturated with an oil (?o = 35oAPI), gas and water. The initial weight of the sample is 224.14 g. After the gas is displaced by water (?w = 1 g/cm3 ), the weight is increased to 225.90 g. The sample is the placed in a Soxhlet distillation apparatus, and 4.4 cm3 water is extracted. After drying the core sample, the weight is now 209.75 g. The sample bulk volume, 95 cm3 is measured in a mercury pycnometer. Find the porosity, water saturation, oil saturation, gas saturation and lithology of the core sample.