Chemistry problems. Please help! (Show answer.) Need to check if my answer is correct.?
1.) How many grams of NH4NO3 is dissolved in 400 g of water to produce 5% by mass aqueous NH4NO3? 2.) Aqueous solution of sulfuric acid 70 g containing 20 g of sulfuric acid. Search for: a.) the mole fraction of solute b) the mole fraction of solvent 3.) A solution is prepared by dissolving 35 ml of ethyl alcohol in 75 ml of water. Search for: a.) the percentage by volume of alcohol in the solution b.) the number of test solution 4.) Limit U.S. Environmental Protection Agency for arsenic in drinking water is 0.05 parts per million. Expressing this value in parts per billion and mg per liter. 5.) What is the mole fraction of solute a solution of 1 m in which toluene (C7H8) is the solvent?
5 = mass x 100 / 400 2000 + May solute solute solute mass x = 100 x 2000 = mass of solute Solute solute mass 95 x = 21 g mol H2SO4 = 20 / 98 g / mol = 0.20 moles of water = 70 / 18 g / mol = 3.9 to) 0.20 / 0.20 + 3.9 = 0.0487 b) 3.9 / 0.20 + 3.9 = 0.95 hope for help
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