456 views. Mass of boron = 0.096g. Unlock answer. Molar mass is the weight of one mole (or 6. Q: For the following reaction, 14.7 grams of phosphorus (P4) are allowed to react with 39.7 grams of ch... A: Given: mass of P4 = 14.7 g mass of Cl2 = 39.7 g molar mass of P4 = 123.895 g/mol molar mass … Molar Mass: 219.8914. 399.0215g 17. Moles of PF3 = 130.97/molar mass of PF3 = 130.97/88 = 1.488 Moles of P4 required to yield 1.488 mol of PF3 = 1.488/4 = 0.372 So the amount of P4 = 0.372 x 31 x 4 = 46.128 g Fill up the table below. Molar mass of O10 is 159.9940 g/mol. Alias: Phosphorus Trioxide. 5.77g/32g = 0.1803 mol O2. 0. B) Which reactant is the limiting reactant? Log in. A) Balance the reaction. The molar mass of PCl3 is 137.32 g/mol and may be useful. ... P4, and sulfur is found in clumps of eight atoms, or S8. Determine the molecular formula (MF) of the compound if it has a molar mass of 60.05 g/mole? How much energy is required to decompose 765 g of PCl3, according to the reaction below? Answer to: Consider a situation in which 112 g of P4 are exposed to 112 g of O2. Moles X Weight Na= 22.99 Cl= 35.45 NaCl= 58.44 3.2 x 58.44 = 187.01g 18. P4(g) + 6 Cl2(g) → 4 PCl3(g) ΔH°rxn = -1207 kJ -1835 kJ Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as losing heat to the surroundings? Percent composition (by mass): Element Count Atom Mass % (by mass) P 1.1 30.974 24.75%. OC2735148. This converts atomic units to grams per mole, making the molar mass of hydrogen 1.007 grams per mole, of carbon 12.0107 grams per mole, of oxygen 15.9994 grams per mole, and of chlorine 35.453 grams per mole. Step 2: Convert mass of P 4 to grams (divide given mass in grams by molar mass of P 4). Already have an account? Massa molar of P4 is 123.8950480 ± 0.0000080 g/mol Convert between P4 weight and moles Example Reactions: 4 PCl3 (g) â†’ P4 (s) + 6 Cl2 (g), Î”H°rxn = +1207 kJ 0 Molar mass of O2 is 31.99880 g/mol Molar mass of P4 is 123.8950480 g/mol. The molar mass of PCl3 is 137.32 g/mol and may be useful. Answered on 15 May 2019. How much energy is required to decompose 765 g of PCl3, according to the reaction below? Thus, percentage of boron by weight in the compound = 0. Unlock this answer. There are 4 atoms of Phosphorus present in the compound, hence, 30.974*4= 128.896 g of phosphorus in P4O10. Molar mass of C16 is 192.1712 g/mol. 몰 질량 of P4 is 123.8950480 ± 0.0000080 g/mol Convert between P4 weight and moles Step 1: Write the balanced equation for P 4 + Cl 2--> PCl 3 *Given that only the amount of one reactant is given, it assumed that P 4 is the limiting reactant, which dictates how much product can be made.. Correct answer: 91.68%. (a) Ethyne, C2H2 (b) Sulphur molecule, S8 (c) Phosphorus molecule, P4 (atomic mass of phosphorus = 31) (d) Hydrochloric acid, HCl (e) Nitric acid, HNO3. Mass of sample =0.24g. Click here to get an answer to your question ️ Calculate the Molecular or Formula massof each of the following: (a)P4 (b)H2O (c)Ca(NO3)2 (d)CH3CO2H(acetic a… Nitric acid has a molar mass of 63.02 grams. Regards ! Still, aside from the exceptions above, all elements have the same molar mass as the atomic masses on the periodic table. Get unlimited access to 3.7 million step-by-step answers. 24 = 40 % Thus, percentage of oxygen by weight in the compound = 0. What is the mass of 3.2 moles of NaCl? The molar mass of P2Cl5 is 208.22 g/mol. We do not have enough moles of Cl2 to react all of P4, so Cl2 is the limiting reactant, but we are looking for the mass of the remaining unreacted P4, so we find the moles unreacted and convert that to grams: 0.3702mol P4 - 1.701molCl2(molP4/6molCl2) = 0.0867 mol P4 unreacted. 144 x 100 0. Verified answer. You have 1 free answer left. (a) Molar mass of ethyne, C2H2 = 2 x 12 + 2 x 1 = 26 g (b) Molar mass of sulphur molecule, S8 = 8 x 32 = 256 g (c) Molar mass of phosphorus molecule, P4 = 4 x 31 = 124 g (d) Molar mass of hydrochloric acid, HCl = 1 + 35.5 = 36.5 g (e) Molar mass of nitric acid, HNO3 = 1 + 14 + 3 x 16 = 63 g What is the mass of 2.5 moles of CuSO 4? 24 = 60 % Molar mass of N2 is 28.01340 g/mol. Molar mass of P4 = 123.88 g/mol mass(P4)= 15.2 g use: number of mol of P4, n = mass of P4/molar mass of P4 =(15.2 g)/(1.239*10^2 g/mol) = 0.1227 mol Molar mass of O2 = … Molar Mass: 141.333 g/mol 1g=7.07548838558582E-03 mol. P4 (s) + Cl2 (g) →P2Cl5 (g) The molar mass of P4 is 123.88 g/mol. 0.0466 < 0.0601; P4 is the limiting reactant of P4O6, meaning there's excess O2 and thus it makes sense to carry forward to the second reaction. Multiply the relative atomic mass by the molar mass constant. 02 x 1023 molecules) of any chemical compounds. What is the molar mass of phosphorus? Mass of oxygen = 0.144g. Formula: P4O6. Calculations: Formula: sO2 Molar Mass: 64.058 g/mol 1g=1.56108526647725E-02 mol Percent composition (by mass): Element Count Atom Mass %(by mass) Calculate the molar mass of the following substances. P (phosphorus) has a molar mass of 30.974 g/mol. This is defined as 0.001 kilogram per mole, or 1 gram per mole. C)Calculate the … Click hereto get an answer to your question ️ One mole of P4 molecules contains : What I Can Do Activity: Sodium in snack food Objective: Determine the % sodium in snack food Procedure: Look at the food labels of some snack food like potato chips, peanuts, popcorn, etc. 096 x 100 0. To calculate the molar mass of the compound we need to look at the molar mass of each individual element that makes up the compound and how many atoms of each are present. If you have 75.0 grams of nitric acid, how many moles do you have? moles of P4 = mass of P4 / molar mass of P4 = (23.0 g) / (123.9 g/mol) = 0.1856 mol From balanced equation 1 mol of P4 produces 4 moles of PCl5 Then 0.1856 mol P4 … 0. 4 PCl3(g) → P4(s) + 6 Cl2(g) ΔH°rxn = +1207 kJ Molar mass of H10 is 10.07940 g/mol. Calculations: Formula: 4PCl3. Balanced reaction is : P 4 + 6Cl 2--> 4PCl 3. Cl … The molar mass of O2 is 32g. 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