How many mL of glycerol (MW=92.1 g/mol, density 1.26 g/mL) must be used to prepare 250.0 mL of a 0.150 M glycerol solution? Answer: 2.74mL glycerol
How many mL of glycerol (MW=92.1 g/mol, density 1.26 g/mL) must be used to prepare 250.0...
How many milliliters of pure liquid methanol (CH3OH, MW = 32.04 g/mol) are needed to prepare 250.0 mL of an aqueous solution of 19.0 g/L methanol? The density of pure liquid methanol is 0.791 g/mL. Then, express the methanol concentration as a volume percent (% v/v).
A 5.0067 g sample of Na2CrO4 (MW = 161.97 g/mol) is dissolved in 250.0 mL of water. Assume the solution has a density of 1.00 g/mL. A 50.0 mL aliquot of the solution is then diluted to a final volume of 250.0 mL. What is the concentration of Na+ in the diluted solution in units of parts per million (ppm)?
You wish to prepare 100.0 mL of a 325.0 ppm w/v sodium (MW = 22.9897 g/mol) solution. How many grams of sodium dichromate dihydrate (Na2Cr2O7·2H2O, MW = 297.998 g/mol) are needed to prepare this solution? Assume the final solution has a density of 1.00 g/mL.
How many moles of benzaldehyde (density d = 1.04 g/ml), (molecular weight mw = 106.12 g/mol) are required to react with 1.0 ml of acetone: (density d = 0.79 g/ml), (molecular weight mw = 58.08 g/mol)? 6. What is approximate theoretical yield for problem # 5 if you obtained 2.1 grams of dibenzylidene acetone (mw = 234.29 g/mol)?
A concentrated HNO3 (MW = 63.0128 g/mol) solution is 70.0 %wt HNO3 and has a density of 1.42 g/mL. How many milliliters of the concentrated HNO3 solution must be diluted to obtain 500.0 mL of 1.00 M HNO3?
A 5.9957 g sample of Na, CrO, (MW = 161.97 g/mol) is dissolved in 1000.0 mL of water. Assume the solution has a density of 1.00 g/mL What is the concentration of Na* (MW = 22.9898 g/mol) in the solution in units of molarity (M)? concentration: М What is the concentration of Na+ in the solution in units of parts per thousand (ppt)? concentration: ppt A 50.0 mL aliquot of the solution is then diluted to a final volume of...
For the reaction below, 11.2 g of triglyceride (MW = 762.0 g/mol) and 52.0 mL of 6.0 M NaOH was used. How many mols of base will be left over once the reaction has completed? (Answer to the Ten Thousandths) Reaction: glyceryl tripalmitate + 3 NaOH --> 3 sodium palmitate + glycerol
You wish to prepare 250.0250.0 mL of a 225.0225.0 ppm w/v Fe2+Fe2+ (MW=55.845 g/molMW=55.845 g/mol) solution. How many grams of ferrous ammonium sulfate hexahydrate (Fe(NH4)2(SO4)2⋅6H2O(Fe(NH4)2(SO4)2⋅6H2O, MW=392.14 g/molMW=392.14 g/mol) are needed to prepare this solution? Assume the final solution has a density of 1.00 g/mL.
How many grams of Na3PO4 (MW = 164 g/mol) are needed to make 282.3 mL of solution that is 0.200 M sodium?
c. A 15.0% stock solution of NaOH has a density of 1.13 g/mL. How would you prepare 250.0 mL of a 0.150 M solution of NaOH from this stock solution? (3 pts)