6)An aqueous solution of a triphosphate derivative of molar mass 602 g mol-1 was prepared by...
11A.2 What is (a) the wavenumber, (b) the wavelength of the radiation used by an FM radio transmitter broadcasting at 88.0 MHz? 11A.3 An aqueous solution of a triphosphate derivative of molar mass 502 g mol-' was prepared by dissolving 17.2 mg in enough water to make 500 cm of solution and a sample was transferred to a cell of length 1.00 cm. The absorbance was measured as 1.011. Calculate (a) the molar absorption coefficient; (b) the transmittance, expressed as...
A standard iron solution was prepared by dissolving 0.0100 g of pure iron in acid then transferring to a 50.00 mL volumetric flask with orthophenanthroline as a complexing agent. At a wavelength of 540 nm, the absorbance of the standard was 0.239 in a 1.00 cm cuvette. A 0.149 g sample of an iron ore was crushed and digested in 5 mL of concentrated acid. The digested sample was then transferred to a 10.00 mL volumetric flask and diluted to...
A solution is prepared by dissolving 10.2 g of sucrose (which has molar mass 342.2965 g/mol) in 151. g of water. At what temperature does this solution boil? Express your answer in units of °C.
A solution of F− is prepared by dissolving 0.0744±0.0005 g NaF (molar mass = 41.989±0.001 g/mol) in 157.00±0.07 mL of water. Calculate the concentration of F− in solution and its absolute uncertainty.
1. An aqueous solution of potassium thiosulfate is prepared by dissolving 3.70 g of potassium thiosulfate in 7.11×102 g of water. The density of the solution is 1.37 g mL-1. a) Determine the mass percent of potassium thiosulfate in the solution. b) Determine the mole fraction of potassium thiosulfate in the solution. 2. An aqueous solution of potassium bromide is prepared by dissolving 8.75 g of potassium bromide in 8.29×102 g of water. The density of the solution is 1.20...
A solution of F− is prepared by dissolving 0.0722±0.0005 g NaF (molar mass = 41.989±0.001 g/mol) in 154.00±0.06 mL of water. Calculate the concentration of F− in solution and its absolute uncertainty. Significant figures are graded for this problem. To avoid rounding errors, do not round your answers until the very end of your calculations.
A solution of F− is prepared by dissolving 0.0986±0.0004 g NaF (molar mass = 41.989±0.001 g/mol ) in 162.00±0.06 mL of water. Calculate the concentration of F− in solution and its absolute uncertainty. Significant figures are graded for this problem. To avoid rounding errors, do not round your answers until the very end of your calculations.
A solution of F− is prepared by dissolving 0.0887±0.0006 g NaF (molar mass = 41.989±0.001 g/mol) in 152.00±0.09 mL of water. Calculate the concentration of F− in solution and its absolute uncertainty.
A compound whose molecular weight is 100 g/mol, has a molar absorptivity of 1.00X10^5 M-1 cm-1. How many grams of this compound should be dissolved in exactly 1 liter of solution so that after diluting it 200 times the solution has an absorbance of 0.500 in a cell of 1.00 cm?
Colligative properties, need to calculate the molar mass of the unknown substance: Can you please show the work for this problem? Thanks! 13 A solution was prepared by dissolving 59.82 g of an unknown (non-ionic) substance to 100.0 g of water. The boiling point of this solution was measured to be 101.7°C. unknown substance. Determine the molar mass of the 13 A solution was prepared by dissolving 59.82 g of an unknown (non-ionic) substance to 100.0 g of water. The...