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- 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 %3DHow to separate silver chloride from lead chloride by equivalent proof ...Trituration 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
- 3 نقاط .Titrant is usually in In a conical flask. In beaker. In buret.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 IIDiffusion 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?
- B) Assess the critical aspects of chemistry involved in sedimentaticHow 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)Identify 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