Table 2. Water loss in Potassium Ferrioxalate Trial 1 Trial 2 Mass of Vial (g) 14.689 11.181 Mass of green salt (g) 0.959 0.934 Mass of Vial with Green Salt (g) Mass after Heating (g) 15.646 12.108 15.541 12.012 Mass of Water Loss (g) 0.105 0.096 Mass % of water Theoretical Percent Mass
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- 2 CoCl2(aq) + 8 NH3(aq) + H2O2(aq) + 2 NH4Cl(aq) 2 [Co(NH3)5Cl]Cl2(s) + 2 H2O(l) In a 50-mL Erlenmeyer flask, cobalt(II) chloride hexahydrate (1.075 g), an aqueous solution of ammonia (1.2 mL, 15 M), ammonium chloride (0.505 g), and hydrogen peroxide (1.0 mL, 30.0% (w/w), density = 1.10 g/mL) were combined. After completion of the reaction, [Co(NH3)5Cl]Cl2 (0.450 g) was isolated. What was the percent yield of the product?Table 5.5 (data)ObservationsSample Tested Add HCISolid CaCO 3 _______Solid CuSo 4 _______Mixture _______Filtrate _______Solid fromfunnel _______Chemistry Heat of Solution (ΔHsoln) for NH4NO3 TRIAL 1 TRIAL 2 Mass of NH4NO3: (NH4NO3 = 80.05 g/mol): 5.06g 5.01g Volume of Water (mL): 50 mL 50 mL Temperature (°C): 1 min: 22.7°C 22.8°C 2 min: 22.7°C 22.8°C 3 min: 22.7°C 22.8°C 4 min: 14.6°C 22.8°C 5 min: 15.6°C 16.0°C 6 min: 16.0°C 16.0 °C 7 min: 16.0°C 16.0 °C 8 min: 16.2°C 16.2 °C ΔT = (Tfinal - Tinitial): 6.5 6.6 Mass of Calorimeter + Solution (g): 226.22g 226.48g Mass of Calorimeter empty (g): 174.58g 175.04g Mass of Solution (g): 51.64g 51.44g CALCULATIONS PART A: qcalorimeter(cal) = (0.961 cal/g °C) · (m) · (ΔT): cal cal qreaction=-qcalorimeter= cal cal #moles NH4NO3: mol mol ΔHsoln=(qreaction/moles NH4NO3: cal/mol cal/mol Average ΔHsoln(NH4NO3) cal/mol cal/mol %error= % % qreaction=- qcalorimeter.
- 1) Mass of flask, aluminum foil, and rubber band 68.45g 2) Temp. Of boiling, water 98.20 0C 3) Barometric pressure 755 mmHg 4) Volume of flask (volume of vapor occupies flask) 152 ml 5) Mass of flask, aluminum foil, rubber band, and condensed vapor 68.60g 6) Mass of condensed vapor is (5)-(1) Find Molecular weight of unknown ______ g / mol Calculation PV = (m/M)RT) è M = (mRT) / PV = ? Unknown liquid- Based on Molecular weight determine which unknown below has this molecular weight: Methanol, Ethanol, Isopropanol, Propanol. UNKNOW IS : __________________________Carbon tetrachloride reacts at high temperatures with oxygen to produce two toxic gases, phosgene and chlorine.CCl4(g) + 1/2O2(g) COCl2(g) + Cl2(g), Kc = 4.4 × 109 at 1,000 KCalculate Kc for the reaction 2CCl4(g) + O2(g) 2COCl2(g) + 2Cl2(g). Round off the answer to two significant digits. Group of answer choices 4.4 × 109 8.8 × 109 1.9 × 1010 1.9 × 1019 2.3 × 10–10The percentage of an additive in gasoline was measured six times with the following results: 0.13; 0.12; 0.16; 0.17; 0.20 and 0.11%. What is the 99% confidence interval for the additive percentage?
- 1. 500.0 mL 0.2 M KI2. 500.0 mL 0.2 M KCl3. 500.0 mL 0.1 M K2S2O84. 500.0 mL 0.1 M K2SO45. 500.0 mL 4.0 mM Na2S2O3 (from Na2S2O3∙5H2O)pls compelete the 2nd table given the data10. The following question is from a practice website. It is shown in the photo below.A company has just patented a new synthetic alcohol for alcohol beverages. You analyse asample of the new product by placing a small volume of it in a round-bottomed flask with avolume of 612.0 mL and an evacuated mass of 131.918 g. You submerge the flask in a waterbath at 100°C and allow the volatile liquid to vaporize. You then cap the flask and remove itfrom the water bath. You weight it and determine the mass of the vapour in the flask to be0.9198 g. what is the molar mass of the volatile liquid, and what does it mean with regard tothe new product? (Assume the pressure is 1 atm)
- 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 =The alcohol content of hard liquor is normally given in terms of the “proof,” which is defined as twice the percentage by volume of ethanol (C2H5OH) present. Calculate the number of grams of alcohol present in 1.00 L of 75-proof gin. The density of ethanol is 0.798 g/mL. Round off to 4 sig. figures for all calculations made prior to final answer and the final answer should be in 3 sig. figuresStock 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.