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A: Given- Mg + Cl2-> MgCl2 +642 kJ
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- How to separate silver chloride from lead chloride by equivalent proof ...12 of 19 <. I Review | Constants | Periodic Table Part B Before investigating the scene, the technician must dilute the luminol solution to a concentration of 4.00×10-2 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00 L of the diluted spray? Express your answer with the appropriate units. » View Available Hint(s) moles of luminol = Value Units %3DTrituration is a process of reducing particle size which involves the addition of an appropriate solvent. Select one: True False
- The air in a recently used classroom 9m x 7m x 9m tested 0.12% carbon dioxide. How many cubic meters of fresh air must be admitted per minute in order that 10 minutes later it shall contain not over 0.06% carbon dioxide. Fresh air contains 0.04% carbon dioxide. Assumeimmediate mixing of fresh with stale air. (A) 14 (B) 11 (C) 15 (D) 19 (E) 17what is the correct sig figs?s.com/course.html?courseld%3D15828855&HeplD353706194671Of71a192e43597b01c6e0#10301 Principles of Chemistry I (Chem 1107-327) signments <09 - Pre-Lab 9.11 Pre-Lab Methane burns in oxygen to produce CO2 and H2O. CH:(9) + 202(g)→2H»O(1) +CO2(g) Part A If 0.55 L of gaseous CH, is bumed at STP, what volume of O, is required for complete combustion? Hνα ΑΣφ Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining 40 DELL
- Volumetric analysis depend on which factor?A bbhosted.cuny.edu/webapps/assessment/take/take.jsp?course_assessment_id=_1... R Paused E Apps G Gmail O YouTube O Maps Home Take Test: Test #1 * Question Completion Status: A MOving to the next question prevents cnanges to tnis answer. Question 4 of 20 > Question 4 4 points Save Answer What is the density of a solid sample that increased the volume of 25.2 mL of water to 34.9 mL when placed in the graduated cylinder and weighs 13.34 g? O A. 0.52 g/mL O B. 0.38 g/mL OC. 1.37 g/mL O D.0.73 g/mL A Moving to the next question prevents changes to this answer. Question 4 of 20 13,846 MAR étv S esc F2 F3 F4 F5 F6 F7 @ %23 24 2 & Q W E R Y IIIdentify whenther the statement are TRUE or FALSE 1. Sedimentation time of a given particle will be zero when the density of the particle and the solvent are equal. 2. Sedimentation time depends on the shape of the particle
- How many molecules of SO3 can be formed from 0.85 moles of O2 (assuming excess SO2) from the following UNBALANCED equation? SO2(g) + O2(g) → SO3(g)Diffusion of Gases Consider that you carried out the following, where you 1. Place 1.0 mL of dilute NH,OH in a test tube and 2. Add a drop of phenolphthalein indicator 3. Then observe and record any change. Any change? 4. Measure 1.0 mL conc. NH,OH and place in another test tube. 5. Use a crucible tong, hold a cotton ball and soak in a phenolphthalein indicator. 6. Place soaked cotton over the mouth of the test tube containing NH4OH. 7. Record your observation. What do you will happen?(a) The researchers are requested to prepare a 5.23 mol dm³ of concentration of Sodium Thiosulphate for the laboratory. The researchers have measured the concentration of the solution prepared by using the Sodium Thiosulphate Concentration Monitor. The result of the experiments is shown in Table 1. Table 1 Reading (M) Researcher Equipment Type Average 3 1 АВС-1 4.75 4.98 4.66 4.80 Y АВС-2 5.40 5.20 5.30 5.30 Z АВС-3 3.45 2.58 4.52 3.52 i. Based on the Table 1, conclude the results obtained by the researchers. ii. Define the metrology term: Error. iii. Calculate the error percentage obtained by each researchers.