What is the concentration in mg/m3 of a solvent detected at 0.15% in a atmospheric analysis of confined space whose molecular weight is 78.11 g/mol? Assume NTP.
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What is the concentration in mg/m3 of a solvent detected at 0.15% in a
atmospheric analysis of confined space whose molecular weight is 78.11 g/mol? Assume NTP.
Please explain, correct answer and typed answer only, no copy paste ( no AI generated answer)
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- Figure 1:Experimental results Mass of empty weighing dish,g 2.2522g Mass of weighing dish + CaCl2 · 2H2O,g 6.2540g Mass of CaCl2 · 2H2O, g 4.0018g [Na₂CO₃], mol⋅L−1 0.3330 mol⋅L−1 Volume of the CaCl2 solution used, mL 10.00mL Volume of the Na₂CO₃ solution used, mL 10.00mL Mass of the filter paper + watch glass, g 51.3999g Mass of the filter paper + watch glass + dry product (final), g Weight 1=51.7235g Weight 2=51.7058g Figure 2:Calculated data Mass of dry product, g 0.3059g Moles of CaCl2 used, mol 0.02721mol Moles of Na₂CO₃ used, mol 0.02721mol [CaCl2], mol⋅L−1 0.3330 mol⋅L−1 Limiting reagent Calculated mass of excess reagent remaining in the mixture after reaction, g Theoretical yield, g % yield I need help in my lab. The number of mols of cacl2 and na2co3 gives me the same number. If I need to calculate the limiting reagent, how would I be able to do that if they have…HDPE and PS are both inert to bases and acids, which plastic would you rather chose to put 1 Liter of 6M HCl for general chemistry lab? Explain why.4.Please give handwritten answer
- trials. Firstly, the student used potassium hydrogen phthalate (KHP, 204.22 g/mol) as standard to determine the exact concentration of the NaOHtitrant. The results of the student are summarized in the table below:Note: The stoichiometric relationship of KHP to NaOH is 1:1Standardization Trial 1 Trial 2 Trial 3 Trial 4KHP Mass, g 0.5033 0.5066 0.6989 0.6843Volume NaOH used, mL 24.32 25.61 24.67 24.56After the standardization, the student weighed different amounts of the unknown acid. In a similar fashion, the student performed acid-base titrationusing phenolphthalein as indicator. The results of the molecular weight determination are summarized below:Note: The stoichiometric relationship of Unknown acid to NaOH is 1:2Molecular WeightDeterminationTrial 1 Trial 2 Trial 3 Trial 4Unknown Mass, g 0.1234 0.1034 0.1178 0.1322Volume NaOH used, mL 21.75 20.56 24.39 25.08The potential unknown given by the professor to the student are as follows:Diprotic acid Fumaric acid Oxalic acid Succinic acid…How to manipulate formula mgh=1/2mv2 to find velocity and massQ4 (a) Analyze the importance of dropping mercury electrode on polarography. (b) (i) Calculate the molarity of MgSO4 in a solution containing 1.5 g ofMgSO4 in a volume of 250 mL?(ii) Calculate the weight of MgSO4 in grams which is present in 100mL of 0.076 M MgSO4?(c) Evaluate the key differences between paper chromatography and gaschromatography