Can someone give me a step by step to the solution? What is the molar mass of H3PO4? Now there is 15 moles of H3PO4 in the initial liter so it is 15M H3PO4! Mass H3PO4 remaining = 18.3 g H3PO4 remaining. The third column labeled Mass of Washers m subscript w (kilograms) has entries 0.0049, empty. Molar mass of *2H3PO4 is 195.9904 g/mol Convert between *2H3PO4 weight and moles moles H2O = 12.0 g / 18.016 g/mol = 0.66607 mol. Example Reactions: • PH3 + 2 O2 = H3PO4 • 3 KOH + H3PO4 = K3PO4 + 3 H2O • H3PO4 + 5 HCl = PCl5 + 4 H2O • H3PO4 + 3 NH3 = (NH4)3PO4 • H3PO4 + NaOH = NaH2PO4 + H2O 1. Mass H3PO4 consumed = 2.50 mol NaOH X (1 mol H3PO4 / 3 mol NaOH) X 97.99 g/mol = 81.7 g H3PO4 consumed. Complete the following calculations for H3PO4.4 pts (1pt each) a. A 5.00 mL sample of an aqueous solution of H3PO4 requires 55.0 mL of 0.258 M NaOH to convert all of the H3PO4 to Na2HPO4. H3PO4 is a colorless viscous liquid at room temperature. molar mass of H3PO4 IS 97.99g/mol. The molar mass of H3PO4 (phosphoric acid) is: 97.993 grams/mol. Molar Mass: 97.9952. Solution The molar mass of H3PO4 is 97.99 g. The percent by mass of each of the elements in H3PO4 is calculated as follows: %H=(3(1.008 g) H/ 97.99 g H3PO4)*100%= 3.086% P4O10 + 6H2O ----> 4 H3PO4. moles P4O10 = mass / molar mass = 10.00 g / 283.88 g/mol = 0.035226 mol. To do this work out how much H3PO4 you would get if all of each reagent individually were to fully react. work out the limiting reagent. From its MSDS sheet it is 1.680g/mL. Start with a liter of solution which is 1000 mLx 1.680 g/mL gives a mass of 1680 g. mass H3PO4 = 1680 g solution x 85 parts H3PO4/100 parts solution = 1430 g H3PO4. c. How many moles of PO43-ions are present in 2.5 moles of phosphoric acid, H3PO4? Mass Na3PO4 formed = 0.833 mol X 163.9 g/mol = 137 g Na3PO4 d. How many H atoms are there in 2.5 mol H3PO4.2.5pt moles of H3PO4 = 25.4 g x a million mol/ninety 8 g = 0.259 mol H3PO4 Kg of solvent = (100g - 25.4 g) = seventy 4.6 g = 0.0746 kg Molality = moles of solute/kg of solvent = 0.259 mol/0.0746 kg solvent Molality = 3.47m The other product of the reaction is water. Calculate the formula and molar mass. See also our theoretical yield calculator for chemical reactions (probably your next stop to finish the problem set). Calculations: Formula: H3PO4 Molar Mass: 97.9937 g/mol 1g=1.02047376515021E-02 mol Percent composition (by mass): Element Count Atom Mass %(by mass) H3PO4 is a strong acid and corrosive. I don't know what to do with this, I tried: (.005 L)(x M) = (.055 L)(0.258 M) And I got 2.838 mol/L But the answer is wrong apparently. What am I doing wrong? How many oxygen atoms are in one unit of H3PO4? - 13159451 ams) has entries 4.9, 14.7. 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