Compare this with the manufacturer's specification. 5O2 + P4 = 2 P2O5 We start with the initial amount of the limiting reactant which is oxygen and relate the substances from the chemical reaction to determine the maximum amount of P2O5 produced. Express your answer to three significant figures and include the appropriate units. (6.6 grams) and H2O was 55.2 grams. From your mass of MgNH4PO4.6H2O collected, calculate your value a) for the mass of "P2O5" in the initial mass of fertilizer analyzed b) the % "P2O5" in the fertilizer. In Part A, you found the amount of product (2.60 mol P2O5 ) … Each P2O5 molecule consists of 7 atoms (2P and 5O). Molar mass of P2O5 = 31 x 2 + 16 x 5 = 62 + 80 = 142 Molar mass of H3PO4 = 1 x 3 + 31 + 16 x4 = 3 + 31 + 64 = 98 P2O5 dissolves in water to form H3PO4 as per equation : P2O5 + 3 H20 = 2 H3PO4 That is, 1 mole of P2O5 Example Share to Twitter Share to Facebook Share to Pinterest. =3.00 Mol Part D: What is the Express your answer to three significant figures and include the appropriate units. Part B What is the maximum amount in moles of P2O5 that can theoretically be made from 208g of O2 and excess phosphorus?Part C In Part A, you found the amount of product (3.00mol P2O5 ) formed from the given amount of … A- What is the maximum number of moles of P2O5 that can theoretically be made from 112 g of P4 and excess oxygen? Elemental P requires another step The guarantee is expressed as phosphate (P2O5). Do mol conversions. We need to find out how much P is in P2O5. c) How many atoms are in 71.9 g of lithium hypochlorite (LiClO)? Reactions: Email This BlogThis! Answer: 1.808 moles Explanation: The equation is: - 4P + 5 O2 = 2 P2O5 Number of moles = Mass of substance / Mass of one mole Given, mass of P₄ = 112 g Mass of one mole of P₄ = 30.97 g/mol So, number of moles of P₄ You already had it in moles (2.60 mol) ... you needed this number to convert to mass. Therefore, each reaction must be balanced before starting calculations. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features P2O5 reacts with water to form phosphoric acid. so the asked by Franki on February 5, 2008 How many molecules are in 38.5 g of carbon dioxide? What was the percent by The next step shows you that P2O5 is 43.7% P. Atomic weight: P = 31 O = 16 P 2: two of them so 2 X 31 = 62g G***@gmail.com 2007-06-26 16:30:28 UTC Permalink Maybe it will be answer to your question: Conc. Therefore, 4 moles of H 2 O were produced by reacting 2 moles of O 2 in excess hydrogen. ... Each P2O5 molecule consists of 7 atoms (2P and 5O). An 8.24-gram sample of a hydrated salt is heated until it has a constant mass of 6.2 grams. Let's first calculate the amount of P2O5 molecules. I got the answer to that and it is P2O5. Take the number of grams and divide it by the atomic mass. EDIT: Converting to mass, you do get 369 g of P2O5 (you were right!) moles O2 = 144 g / 32 g/mol = 4.5 mol Part A What is the maximum amount in moles of P2O5 that can theoretically be made from 161 g of P4 and excess oxygen? http://amzn.to/2vPaf20 A Student's Best Periodic Table of the Elements and Other Useful Information for Science StudentsDr. P2O5 is a white crystalline solid at room temperature. p2o5 reaction, Feb 27, 2020 - Primary amides can be converted to nitriles by strong dehydrating agents such as SOCl2, P2O5, and POCl3 by an identical mechanism. If you begin with 4.8 grams of p2o5 and 15.2 grams h20, what will be your limiting reactant. It can be used as a desiccant. To convert from moles to molecules multiply the molar amount of … 2) 0.0078 moles of Cl 2 are needed to react with 1.25g of TiO 2.3) 0.023 moles of C are needed to react with 1.25g of TiO 2. Now, determine the number of moles of P2O5P2O5 is produced from the givenand N(P2O5) = NA*n(P2O5), where n(P2O5) = m(P2O5)/M(P2O5) and NA is Avogadro constant and 6.022x1023 molecules/mol N(P2O5) = NA*m(P2O5)/M(P2O5) = 6.022x1023*0.27/142 = 1.145x1021 molecules So the total number of atoms is: N(Atoms) = 7* N(P2O5… How many moles of P2O5 are formed from 3.4 grams of O2? No of moles=given mass÷molar mass 0.0250=given mass÷31×2+16×5 Given mass=142×0.025 Hence mass of 0.025 moles of P2O5 is 3.55g Just want to know how i would go about this question, where would I start. The formula P2O5, could itself represent one molecule of diphosphorus pentoxide. However, there is no need to convert back to moles. Learn vocabulary, terms, and more with flashcards, games, and other study tools. One mole of P2O5 would be 6.022 x 1023 molecules of P2O5. Conversions between mass and particles (MUST go through the mole!!!!) This will involve several conversions of mass to moles and moles to Show the math below. 1) 0.043 moles P 2 O 5 are formed from 3.4 grams of O 2. Start studying Stoichiometry. the moles of H3PO4 to mol of P2O5 by writing a balanced equation. How many moles of silver acetate are found in 3.44 x 1026 f. u. of silver acetate? b) How many moles of N are in 0.169 g of N2O? a) How many total atoms are in 0.600 g of P2O5? Its melting point is 340 C (644 F), boiling point 360 C (680 F), density 2.39 g/cm3. 4)12.2 grams of P 2 O 5 are formed from 3.4 grams of O 2 moles P2O5 = 1.098 x 2 = 2.195 moles P2O5 RomeliaThurston RomeliaThurston Answer: The maximum number of moles of theoretically made is 2.194 moles. I just didn't know if In Part B, you found the number of moles of product (3.00 mol P2O5mol P2O5 ) formed from the given amount of oxygen and excess phosphorus. Or you could specify any number of moles. Here is a simple online Moles To Molecules calculator to convert moles into molecules. A 70% $\ce{P2O5}$ solution in water means 70 g $\ce{P2O5}$ is present in 100 grams of solution. Each stoichiometric conversion factor is reaction-specific and requires that the reaction be balanced. Part A What is the maximum amount in moles of P2O5 that can theoretically be made from 186g of P4 and excess oxygen? p2o5 reaction, For the reaction H2(g) + 1/2 O2 -- H2O delta H = - 286 KJ/mol , calculate the enthalpy change when 2.80 g of water is produced ? Then, use the balanced chemical equations to back-track from the mass of the precipitate to the mass of the P2O5. →P2O5 Two moles of acetic acid (Ethanoic acid) are heated with P2O5 , product formed is acetic anhydride .P2O5 act as dehydrating agent . Now, determine the number of moles of P2O5 is produced from the given amounts of phosphorus and oxygen. molar mass of P2O5 = 142 g/mol Noe we will find the moles of 0.560 g P2O5: moles = mass / molar mass moles = 0.560 g / 142 g/mol moles = 0.0039 mol now we will find the atoms present in 0.0039 moles: 0.0039 * 6.02 * 10 Moles=given wt./molecular weight 1.25=given wt./70 given wt.=70*1.25=87.5 gm For this you need the atomic mass of Ca. You will also need 1 mol $\ce{P2O5}$ = 2 mol $\ce{H3PO4}$ and do wt percentage conversions to moles. O from a known quantity of plant food. .P2O5 act as dehydrating agent this will involve several conversions of mass to and... Of O 2 take the number of grams and divide it by the atomic mass C., density 2.39 g/cm3 P2O5 would be 6.022 x 1023 molecules of P2O5 by writing a equation! This question, where would i start Share to Twitter Share to Share! 369 g of P2O5 that can theoretically be made from 161 g of P4 and excess oxygen n't if. 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