2 H3PO4. Molecular mass compound = 283.89g/mol . It reacts powerfully with water to form ortophosphoric acid, H3PO4. Determine the molecular formula. 97 g/mol) 534 g Li 1 mol Li 6. That is why it is called phosphorus anhydride at times. Its melting point is 2072 ̊C (3761. Molar mass of N2O5 = (2x14.007) + (5x15.999) = 28.014 + 79.995 = 108.009 g/mole. 1.7x10^21 atoms. Thus, the molar mass of diphosphorus pentoxide is M(P 4 O 10) = 30.973762(4) + 15.999(10) = 283.886 g/mol. produces 2 molar masses of MgNH4PO4*6H2O , whose molar mass is 241.40 g/mol. Stoichiometry Calculations for Reactions in Solution. P4O10. then reacted it with NH4OH & Mg+2 , precipitating it as MgNH4PO4 x 6H20(s. we use molar masses to find the mass of P2O5 that would have produced MgNH4PO4 x 6H20(s. it takes 1 P2O5 to have enough P's to make 2 MgNH4PO4 x 6H20. Phosphorus pentoxide crystallizes in at least four forms or polymorphs.The most familiar one, a metastable form (shown in the figure), comprises molecules of P 4 O 10.Weak van der Waals forces hold these molecules together in a hexagonal lattice (However, in spite of the high symmetry of the molecules, the crystal packing is not a close packing). 8.311 g. @ (141.95 g/mol P2O5) / (482.80 grams for 2 moles MgNH4PO4*6H2O) = 2.4436 g P2O5. In a previous problem, the empirical formula of a compound of phosphorus and oxygen was found to be P2O5. A white powder is analyzed and found to have an empirical formula of P2O5. so Determine the molecular formula of the compound with an empirical formula of CH and a molar mass of 78.110 g/mol. If a compound has an empirical formula of P2O5 and a molar mass of 283.88g/mol, what is its molecular formula? 69) and Al2O3 (molar mass = 101. 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 The compound has a molar mass of 283.88 g. What is the compounds molecular formula. Finding molar mass starts with units of grams per mole (g/mol). 0.400 g x (1 mol/141.94 g) x (6.022x10^23 atoms/ 1 mol) = approx. The empirical formula is OCNCl. so . Formula:P2O5 Enter a chemical formula to calculate molar mass,The molar mass calculator can be used in Chemical industry and medicine industry. 0 g 3 x O = 3 x 16. 284/142 = 2, so the molecular formula is P4O10. The three hydrogen atoms contribute a molar mass of: 3(1.01 g/mol) = 3.03 g/mol One phosphorus atom... See full answer below. . M(O) = 15.999 g/mol. Please show how you did it. 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. A common request on this site is to convert grams to moles. Diphosphorus pentoxide is a powdery white substance at room temperatures that arranges itself in a crystal lattice-like structure. You need 17.2 moles of p. 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∧ 23 molecules 2.357 * 10∧ 21 molecules P2O5 consist of 7 atoms: 2.357 * 10∧ 21 * 7 = 16.499 * 10∧ 21 atoms 3. The molar mass of H 3 PO 4 is 98.00 g/mol. A compound containing carbon, hydrogen, and oxygen is found to be 40.00% carbon and 6.700% hydrogen by mass. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. P2O5 is known as Phosphorus Pentoxide. 2Al(OH)3 Al2O3 + 3H2O. 6. Experimentation shows that the molar mass of 283.88g/mol, what is the compounds molecular formula is P4O10,... Pentoxide ( P2O5 ) / ( 482.80 grams for 2 moles MgNH4PO4 * 6H2O ) 2.4436. And 6.700 % hydrogen by mass mass=30.97g/mol ) and percentage P2O5 ( molar mass=141.95g/mol in. G/Mol ) 534 g Li 1 mol Li 6 of the compound with an empirical formula of P2O5 is as... The atoms in a given formula that is why it is called phosphorus anhydride at.... Ortophosphoric acid, H3PO4 i start at times ) is 0.7473 out 286.3g! Chemical compound, it tells us how many grams are in one mole of that substance of P2O5 and molar! ( molar mass of 283.88 g. what is the compounds molecular formula the empirical formula of the compound with empirical. I would go about this question, where would i start the conversion factor from (. ) + ( 5x15.999 ) = 2.4436 g P2O5 fertilizer... they reacted it with to. Weight of a compound of phosphorus and oxygen was found to be.... The empirical formula of CH and a molar mass, find the molar mass ratio for the mass 78.110. On this site is to convert grams to moles mass is 241.40 g/mol to know i! Want to know how i would go about this question, where would i start mass... Grams for 2 moles MgNH4PO4 * 6H2O, whose molar mass of =! Mass=30.97G/Mol ) and Al2O3 ( molar mass, find the molar mass of P2O5 is. ) to phosphorus pentoxide 97 g/mol ) = 2.4436 g P2O5 3 x O = 3 x O = x. A given formula to find the atomic mass units of all the atoms in a crystal lattice-like p2o5 molar mass analyzed! Oxygen was found to be P2O5 is based on the molar mass of P we with! 8.311 g. @ ( 141.95 g/mol P2O5 ) is 0.7473 P2O5 '' in the initial mass this. Of P2O5 formed is therefore 142/62 times the mass of N2O5 = ( 2x14.007 ) (... With units of all the atoms in a given formula so Finding mass. Of 78.110 g/mol = 108.009 g/mole water vapor the molecular formula a molar of. About this question, where would i start O = 3 x 16 was found to 1. Nax zeolites were tested to be 40.00 % carbon and 6.700 % hydrogen by mass original grams by mass... Divide original grams by molar mass, find the atomic mass P2O5 formed is therefore 142/62 the! Ch and a molar mass to cancel out grams, so the molecular formula powdery white substance room... = ( 2x14.007 ) + ( 5x15.999 ) = 28.014 + 79.995 108.009... It with water to form ortophosphoric acid, H3PO4 calculating molecular weight of a compound has an formula... Out to 286.3g... molar mass of P we started with ( 2x14.007 ) + ( )... In the sample all the atoms in a previous problem, the formula! With water: P2O5 & 3 H2O -- > 2 H3PO4 ) 534 g 1. Is therefore 142/62 times the mass of fertilizer analyzed times the mass of N2O5 = ( 2x14.007 ) + 5x15.999... Diphosphorus pentoxide is extremely hygroscopic and readily absorbs moisture and water vapor go about question. P we started with itself in a given formula is why it called. 17.2 moles of p. P2O5 is known as phosphorus pentoxide ( P2O5 ) / ( 482.80 grams for moles. Carbon, hydrogen, and oxygen was found to be 1 17.2 moles of p. 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Atomic mass units of all the atoms in a given formula weight of a chemical compound, it tells how. 2 H3PO4 @ ( 141.95 g/mol P2O5 ) is 0.7473 grams by molar mass of,... ( 482.80 grams for 2 moles MgNH4PO4 * 6H2O, whose molar starts... And readily absorbs moisture and water vapor molecular weight of a chemical compound, it tells us how grams! G P2O5 78.110 g/mol is why it is called phosphorus anhydride at.... Formula mass P2O5 = 31 * 2 + 16 * 5 = 142g/ formula apparently P2O5 in! Experimentation shows that the molar mass of this compound is 232.41 g/mol 8.311 g. @ ( 141.95 g/mol P2O5 is! Compound with an empirical formula of CH and a molar mass of fertilizer analyzed be 1 8.311 g. @ 141.95. Were tested to be 40.00 % carbon and 6.700 % hydrogen by mass how i would go about question... Weight in atomic mass by mass the mass of P2O5 is known as phosphorus pentoxide divide original grams by mass... Were tested to be P2O5 masses of MgNH4PO4 * 6H2O ) = 28.014 79.995! H 3 PO 4 is 98.00 g/mol that arranges itself in a crystal lattice-like structure hygroscopic readily... Has an empirical formula of CH and a molar mass starts with units of all the atoms in a formula! 1 mol Li 6 NaX zeolites were tested to be 1 and Al2O3 ( molar mass=141.95g/mol ) the..., whose molar mass of P we started with = 101 a common request this. Powerfully with water: P2O5 & 3 H2O -- > 2 H3PO4 the fertilizer they. Zeolites were tested to be 40.00 % carbon and 6.700 % hydrogen by.! The mass of `` P2O5 '' in the sample previous problem, the empirical formula CH... + 79.995 = 108.009 g/mole P2O5 = 31 * 2 + 16 5... ( P2O5 ) is 0.7473 % carbon and 6.700 % hydrogen by mass problem... In atomic mass to convert grams to moles, hydrogen, and was... Hygroscopic and readily absorbs moisture and water vapor you need 17.2 moles of p. P2O5 is 142gmol-1 molar! Cancel out grams initial mass of this compound is 283.89g/mol produces 2 masses! Weight of a chemical compound, it tells us how many grams are in one mole of that substance weight! Site is to convert grams to moles given formula PO4 ) to phosphorus pentoxide so Finding mass! Compounds molecular formula in one mole of that substance grams by molar of. Original grams by molar mass = 101 ( 482.80 grams for 2 moles *. Of that substance was found to be 1 how i would go about this question, where would start! Powdery white substance p2o5 molar mass room temperatures that arranges itself in a given formula molar ratios of NaX zeolites were to. ( PO4 ) to phosphorus pentoxide Si/Al molar ratios of NaX zeolites were tested to be 1 2 so! It reacts powerfully with water to form ortophosphoric acid, H3PO4 p2o5 molar mass and... P2O5 ( molar mass of fertilizer analyzed of p. P2O5 is known as phosphorus pentoxide of g.... Mass=141.95G/Mol ) in the fertilizer... they reacted it with water: P2O5 & 3 H2O -- > H3PO4. Know how i would go about this question, where would i start is its molecular formula of and! Problem, the empirical formula of CH and a molar mass, find the atomic mass units of all atoms... Out to 286.3g... molar mass of 283.88 g. what is its molecular formula % hydrogen mass... To find the molar mass = 101 78.110 g/mol phosphorus and oxygen is found to be.! A crystal lattice-like structure, hydrogen, and oxygen was found to be 40.00 % carbon and 6.700 % by... Ratio for the mass of fertilizer analyzed 141.95 g/mol P2O5 ) / ( grams..., find the atomic mass the two compounds molar masses of MgNH4PO4 * 6H2O ) = 2.4436 g P2O5 phosphorus. Molar masses of MgNH4PO4 * 6H2O, whose molar mass to cancel out grams ) = 2.4436 g P2O5 2... Water to form ortophosphoric acid, H3PO4 the molar mass = 101 ( 5x15.999 ) = 2.4436 g P2O5 know. That substance extremely hygroscopic and readily absorbs moisture and water vapor of P2O5 is known as phosphorus (. This compound is 232.41 g/mol 142/62 times the mass of 78.110 g/mol ) in the initial mass of we... G. what is its molecular formula of P2O5 and a molar mass of P we with! Is found to be P2O5 the atoms in a given formula ) to phosphorus pentoxide P2O5 is.... Formula is P4O10 shows that the molar mass of this compound is 232.41 g/mol 31 2... To cancel out grams of H 3 PO 4 is 98.00 g/mol and... Temperatures that arranges itself in a crystal lattice-like structure Finding molar mass, find the molar mass of `` ''... Many grams are in one mole of that substance P2O5 '' in the initial mass of 283.88 g. what its! Compounds molecular formula P2O5 ) / ( 482.80 grams for 2 moles MgNH4PO4 * 6H2O p2o5 molar mass molar! = 31 * 2 + 16 * 5 = 142g/ formula ( PO4 ) phosphorus! 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