Answer to: Calculate the amount of water (in grams) that must be added to 5.00 g urea in preparation of 16.2% by mass solution. By signing up,...
Calculate the moles in 7.98 grams of H2O. Converting Mass to Moles: Two quantities that are essential in quantitative chemistry are moles and mass. Both of these are used to express an amount of a particular substance, and are typically converted to one another during calculations. The substance...
(ii) Calculate the value of x in the formula of the hydrated potassium carbonate, K2COxH2O.Show your working.X =[2](c)One of the errors associated with this method is caused by the solubility of carbon dioxide in water.Suggest two modifications which could reduce this error.modification 1...
21 (a) A student dissolves 0.6 g of zinc sulfate in 250 cm3 of water.(i) Calculate the volume of the water in dm3.Answer=...dm3 [1](ii) Use your answer to part (a)(i) to help you calculate the concentration of the zinc sulfate in g/dm3.Answer=...g/dm3 [1](b)Zinc...
If your values are correct, and they may not be, the procedure to determine ratio of water to the anhydrous salt is.. moles H2O/moles anhydrous salt = 0.085/0.0055 = 15.5 = 16. Water of hydration rarely exceeds 10:1 so this does not seem like the correct m...
xethanol=nethanolnethanol+nwaterWhere:- nethanol = number of moles of ethanol- nwater = number of moles of water Step 3: Assume a mass for the solvent (water)To simplify calculations, we can assume we have 1 kg of water. The number of moles of water can be calculated using its ...
Molar Mass, Moles and Avogadro’s Number Calculate the molar mass of: 1) (NH 4 ) 2 S 68.16 g 2) Fe 2 O 3 159.7 g 3) KClO 4 138.55g 4) SF 6 146.06 g 5) (NH 4 ) 2 SO 4 132.16 g 6) KClO 4 Calculate the grams present in: ...
To calculate the solubility of hydrogen gas (H₂) in water at 25°C when the partial pressure of H₂ above the solution is 1 bar, we will use Henry's Law. Henry's Law states that the solubility of a gas in a liquid is directly proportional to the
Calculate the molarityof a solution prepared by dissolving 23.7 grams of KMnO4into enough water to make 750 mL of solution. This example has neither the moles nor liters needed tofind molarity, so you must find the number ofmolesof thesolutefirst. ...
Assume the specific heat of the solution is that of water; 4.184 J/(g oC). (4) Calculate the enthalpy change of the reaction using equation (1) (Hrxn). (5) Assuming H2O2 is the limiting reagent, calculate the moles of H2O2. A 3.0...