Given the following data/observations for experiment #43B [39B]: a. the mass of Benzyltriphenylphosphonium Chloride (BTPC)(limiting reactant) used was 0.486g. b. the observed melting point of the purified product was 145-149 °C. c. the mass of the purified product was 0.217 g. Calculate the theoretical and the percent yield of the purified product from the above data (show all appropriate calculations and units).
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- A popular brand of tea powder contains 3.5% caffeine as indicated by the label on it. 1.80 g of the tea powder was used to extract caffeine from it and obtained 0.031 g of pure caffeine. What is the percentage recovery of caffeine based on the caffeine content (as labeled) in the tea powder? O 49.21% O 1.72% O 62.50% O 42.25%What were the starting materials used in the synthesis of the thermochromic material? a. diethylamine HCl and isopropyl alcohol O b. Copper (II) chloride and absolute ethanol O c. diethylamine HCl and CuCl, O d. isopropyl alcohol and pure ethanolToluene, C7H8 , is burned with 30% excess air. A bad burner causes 15% of the carbon to form soot (pure C) deposited on the walls of the furnace. What is the Orsat analysis of the gases leaving the furnace
- O Launch Meeting - Zoom O Launch Meeting - Zoom od212ou%3D2591470&isprv &drc3D1&qi=24592388cfql%=D08drnb- ttempt 1 A honeycomb-shape casing of the metals platinum (Pt), rhodium (Rh), and palladium (Pd) in catalytic converters of automobiles cause more reactions to take place that produce less harmful gases without being affected by the reaction. These metals are catalysts because: They cause the reactions without being affected. They are formed into a honeycomb shape. They are metals. They help produce less harmful gasses.Q2: What is the yield percentage of the preparation of Co(salen) complex, if we start from 0.721g of salenH2 and the practical weight of the complex is: 0.632g. A. wt (Co=58.933, H=1, 0=16, C=12, N=14)Assume that the mass of impure acetanilide is 1.732 g. and the mass of recrystallized acetanilide is 1.271 g. Calculate the percent recovery.
- [4cde] c. Calculate for the mass of struvite that can be formed in the given urine sample. d. Given that the specific gravity of struvite is 1.7, determine if the amount of struvite in c can pass through the kidney. Note: less than 6mm diameter urolith can pass through the kidney. Assume that the urolith is spherically shaped. e. Using your answer in c, calculate for the number of phosphate ions in the sample.Why are we adding NH3 and write down the net reaction. CALCIUM PEROXIDE OCTAHYDRATE (CaO2.8H2O) SYNTHESIS CaCO3 + 2 HCl --> CaCl2 + CO2 + H2OCaCl2 + 2 NH3 + H2O2 + 8 H2O --> CaO2.8H2O + 2 NH4+ + Cl- 5 g of pure CaCO3 is added in small portions to 10 mL of water and 20 mL of 18% HCl in a 100 mL beaker and mixed with a bottle. During this process, the mixture should be boiled in order to remove the CO2 formed. When the CaCO3 addition is complete, it is observed that a sufficient amount of precipitate is formed at the bottom of the container. The solution is filtered while hot, the excess water is evaporated and cooled with ice water. Thereupon, he says 25-30 mL of 6% H2O2 solution, 5 mL. NH3 and 100 mL water are gradually added with stirring. After stirring for a while, the crystals formed are filtered, washed several times with water and dried in a desiccator.4. A sample containing a mixture of gm / mole (NaCl 58.44) and NaySO with a weight of 0.9532 gm analyzed to find out Nacl in it. Silver nitrate was added to it after dissolving with water, then silver chloride was deposited (gm / mole 143.32) with a weight of 0.7033 gm. Calculate the percentage of Nacl in the model?
- Draw a schematic diagram using this information. Preparation of the solution Take about 25-30 ml of distilled water in a beaker and add powdered crude copper sulphate while stirring the solution so that the powder dissolves. Keep adding the powdered sample till a little of it remains undissolved, even if it is stirred thoroughly. Now add 2-3 ml of dil. H2SO4 to make the solution clear. This prevents the hydrolysis of copper sulphate. Filtration of the solution Take a funnel and fix a filter paper in it and clamp it to a stand. Place a china dish under the funnel. The stem of the funnel should touch the wall of the china dish to avoid the solution splashing out. Pour the solution into the funnel over a glass rod and collect the filtrate in a china dish. The insoluble impurities are left in the filter paper as residue. Concentration of the filtrate to crystallisation point Heat the china dish on a sand bath till the solution is reduced to about one-third of its original volume. To…You wish to consider addition of methanol to groundwater for anaerobic biological removal of nitrate by denitrification. If the nitrate nitrogen (as N) concentration is 84 mg/l, what minimum concentration of methanol should be added to achieve complete nitrate reduction to nitrogen gas. Assume no ammonium is present and fs for the reaction is 0.30.3. Using this data, calculate a value for Kc for the reaction, A. 2.06 x 104 B. 4.84 x 10-3 C. 0.223 D. 4.49 E. 20.2 2 NO(g) + Cl₂(g) 2. NOCI(g) Kc = 3.20 x 10-³ 2 NO2(g) 2 NO(g) + O₂(g) Kc = 15.5 4. Using the data, NOCI(g) + 1/2O2(g) NO2(g) + ½ Cl₂(g) 3 A (g) + 4 B (g) A3B4 (g) calculate a value for Kc for the reaction, 3 A (g) + 4 B -A3B4 (g) 2 AB (g) + AB2 (g) (g) Kc = 25 Kc = 3.75 2 AB (g) + AB2 (g)