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- Here is a use objective for a chemical analysis to be performed at a drinking water purification plant: “Data and results collected quarterly shall be used to determine whether the concentrations of haloacetates in the treated water demonstrate compliance with the levels set by the Stage 1 Disinfection By-products Rule using Method 552.2” (a specification that sets precision, accuracy, and other requirements). Which one of the following questions best summarizes the meaning of the use objective?(i) Are haloacetate concentrations known within specified precision and accuracy?(ii) Are any haloacetates detectable in the water?(iii) Do any haloacetate concentrations exceed the regulatory limit?OSHA's Hazard Communication Standard requires chemical manufacturers to evaluate hazards relating to their products and provide a Safety Data Sheet in accordance to the Globally Harmonized System (GHS) in which the use of pictograms (see Figure 1) is required to communicate hazard information. Predict (with reasons) two (2) hazards related to each of the two activities below, and assign two (2) relevant pictograms listed in Figure 1 to each of the two activities. Activity 1: Removing diethyl ether (last opened in 2019) using a rotary evaporator. Activity 2: Using carbon monoxide gas as a reducing agent to reduce iron chloride. Figure 1. Pictograms advised by the Globally Harmonized System for communication of chemical hazards.Module Code & Title: CHM9011M Chromatography and Sep Sciences Section 1: Purpose Clarity of Purpose ): Clearly states the purpose of the SOP. Relevance to Task : Demonstrates the importance and relevance of the procedure. Alignment with Goals ): Shows how the procedure aligns with organisational goals.
- (i) (ii) (iii) (iv) 'I OMe HO H g H N Me Br SnMe3 OSiMe3 CHO OH NaNH, NH3 (1) Phl, Pd(PPH3)4 THF, reflux 1. Ph3P=CMe2 2. "Bu4NF 3. H30 + CH₂12, Zn C C₂H₂NO D C₁1H₁1N E C10H16O F C15H26O2(a) Water in vadose zone contains chlorobenzene of concentration 40 mg/L. What is the equilibrium concentration soil air in contact with this solution? (b) An aquifer with porosity 0.3 has distribution coefficient of TCE as 100 L/kg. What fraction of TCE is in aqueous phase and sorbed phase of the soil?DL IXL - Area and circur X E Hamilton w K Maya Paniagua - Sto x K Maya Paniagua - L10 X Stoichiometry Introd x amihq.com/web/viewer.html?state=%7B"ids"%3A%5B"1Jb_fUymErbX45jcXDbRuMhdNQC9zAIBE"%5D%2C*action"%3. Paniagua - Cl. 115% e A Kami Uploads Maya Paniagua - Stoichiometry WS1.pdf Chemistry Stoichiometry WS #1 Show all work!! No work = no credit! Per Date Name Mole to Mole Stoichiometry 1) For the reaction between magnesium fluoride and lead (IV) nitrate, there are 12 mol of magnesium fluoride available: a. Write and balance the chemical equation, indicate the type of reaction b. Find the mole amount of each species in the chemical reaction c. How many moles of the solid precipitate are formed?
- Describe the primary and secondary criteria for having achieved V ̇O2 max.Briefly explain method validation in analytical chemistry? Discuss typical validation characteristics which could be considered. Name some international organisations offering guidelines on method validation(3) In a titration, the % analyte is computed from the following equation: Vol (titrant) x M (titrant) x MW (analyte) % analyte = x 100 Weight (sample) Calculate the absolute error in the % analyte from the following data. Vol (titrant)= 38.04 t 0.02 ml M (titrant) MW (analyte) = 74.116 t 0.005 mg/mmol Wt (sample) = 800.0 ± 0.2 mg = 0.1137 ± 0.0003 mmol/ml %3!
- The researcher extracts a sample of well water and prepares it for TXRF analysis with a 10.00 mg/L V internal standard, like the calibration standards. The result produces SCa = 69297.81 and SV = 13481.2.Determine the concentration of Ca.When we analyze the Uniformity of Dosage Units (content uniformity) in compressed tablets during PPQ, should we use the same or different methodology and acceptance criteria as those described in respective USP monograph (905) that is used for CU evaluation of routine product batches? Please explain.What is the actual or real-life application of precipitation gravimetric analysis? Include the specific methodology.