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- What is the value (g) of the reduced mass of HF? A.)20 B.)0.95 C.)1.05 D.)3.80 × 10^2Imagine that you don't know Ca for the acetic acid, but have determined Vend to be 25.0 mL and know that Va = 50.00 mL and Cb = 0.1200 M. Calculate Ca from this data:Following titration analysis, a sample of a fruit juice was found to contain 8.9 mg cm-3 ascorbic acid. Given that the Mr value for ascorbic acid is 176.1 Da, calculate the value of the ascorbic acid concentration expressed in units of mmols dm-3 then enter it
- A solution at 25°C is 0.21 M KOH. What are the concentrations of H3O+ and OH− in this solution? (The value of Kw at 25°C is 1.0 10-14.) H3O+ M OH − MBoth buret and volumetric pipet are mark TD or Ex. What does this mark mean? What are the major differences between the two and what are their applications?3What is the ratio strength of benzalkonium chloride in a nasal spray that contains 125 µg/mL of the ingredient? a 1:8 b 1:80 c 1:800 d 1:8000
- for a experiment how would you calculate the mmol & Equivalents with MW= 106.42g/mol Amount Used: 42mg Density: 12.02g/molIn the conductivity test, _____________________ is going to result to a brightly lit light bulb. a. 70% v/v ethanol b. 1.0 M citric acid c. Mixture of 10.0 mL 1.0 M Mg(OH)2 and 10.0 mL 1.0 M HNO3 d. Glacial acetic acidGiven the following KD values for extraction of solute M in water with organic solvents A, B, C and D:A: 2.0B: 4.0C: 6.0D: 8.0 Which is the most efficient solvent to extract M from water? A, B, C or D?
- Calculate how many mEq of sodium (MW 23) are present in an admixture that is prepared by adding a 10 milliliter vial of NaCl (2.5 mEq/mL) to 500 milliliters of 1/2 normal saline. (MW NaCl 58.4; MW CL 35.4).Prepare 25ppm of Cd (NO3 )2.4H2O in a 500ml from 1000ppm stock solution of Cd (NO3)2.4H2OK2SO4 in order to prepare a 1 N of the solution. • What are the specifications of primary standard solution?