Advertisements
Advertisements
प्रश्न
Calculate the mass percentage of aspirin (C9H8O4) in acetonitrile (CH3CN) when 6.5 g of C9H8O4 is dissolved in 450 g of CH3CN.
उत्तर
Given, Mass of aspirin = 6.5 g, Mass of acetonitrile = 450 g
Mass percent of aspirin = `"Mass of aspirin"/("Mass of aspirin" + "Mass of acetonitrile") xx 100`
= `6.5/(6.5 + 450) xx 100`
= 1.424%
APPEARS IN
संबंधित प्रश्न
Define Molarity (M).
A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the resulting solution.
A sample of 12 M Concentrated hydrochloric acid has a density 1.2 M gL-1 calculate the molality.
When a solute is present in trace quantities the following expression is used:
The molarity of the solution containing 7.1 g of Na2SO4 in 100 ml of aqueous solution is ____________.
4.0 g of NaOH is dissolved in 100 ml solution. The normality of the solution is ____________.
The molarity of pure water is ____________.
An aqueous solution of glucose is 10% in strength. The volume in which 1 g mole of it is dissolved, will be:
10 g of NaCl is dissolved in 106 g of the solution. Its concentration is ____________.
On adding a solute to a solvent having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is:
2.5 litres of NaCl solution contain 5 moles of the solute. What is the molarity?
5 ml of N HCl, 20 ml of N/2 H2SO4 and 30 ml of N/3 HNO3 are mixed together and volume made to one litre. The normality of the resulting solution is:
25 ml of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a titre value of 35 ml. The molarity of barium hydroxide solution was:
200 ml of water is added to 500 ml of 0.2 M solution. What is the molarity of this diluted solution?
Mole fraction of glycerine C3H5(OH)3 in solution containing 36 g of water and 46 g of glycerine is ____________.
Cone. H2SO4 is 98% H2SO4 by mass has d = 1.84 g cm−3. Volume of acid required to make one litre of 0.1 M H2SO4 is:
The concentration of water molecules in pure water at 298 K is?
The number of electrons involved in the reduction of one nitrate ion to hydrazine is
The unit of ebullioscopic constant is
250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl. The number of unreacted HCl molecules in the solution after complete reaction is ______ × 1021. (Nearest integer) (NA = 6.022 × 1023).
