Students explained why I 2 is solid at room temperature, but Br 2 is a liquid in part (d). *Response times vary by subject and question complexity. Explanation of how to find the molar mass of PbI2: Lead (II) iodide. 0.0136. Then Match This Molar Mass To The Molar Mass Of The Halogens: F2, Cl2, Br2 And I2) 1. Poutnik Poutnik. Remember: moles = mass ÷ relative formula mass (M r) Moles of propane burned = 0.5 ÷ 44 = 0.01136. Bromine 2. PNDPGZBMCMUPRI-UHFFFAOYSA-N Copy. In such a conversion, we use the molar mass of a substance as a conversion factor to convert mole units into mass units (or, conversely, mass units into mole units). The iodine value is the mass of iodine in grams that is consumed by 100 grams of a chemical substance typically fats or oils. The molar mass of atoms of an element is given by the relative atomic mass of the element multiplied by the molar mass constant, M u ≈ 1.000 000 × 10 −3 kg/mol = 1.000000 g/mol. 3.58 g NI3 ( 1 mol NI3 / 394.71 g NI3 ) ( 3 mol I2 / 2 mol NI3 ) = 0.014 mol I2. 0.00907 0.00940 0.0136 0.0212. Molar mass of KMnO 4 = 158.0 g; Use this number to convert grams to moles. Check out a sample Q&A here. Now, move on the next step – which is to calculate the molar enthalpy change. how many moles of i2 will form 3.58 g of ni3? −97 kJ/mol 4. +52 kJ/mol 5. See the answer. Molecular weight is actually an older term of “relative molar mass” or “molecular mass”, which is a dimensionless quantity equal to the molar mass divided by the molar mass constant defined by 1 g/mol. common chemical compounds. Want to see this answer and more? (a) 0.600 mol I2 (molar mass of I2 = 253.80 g/mol) ---- g (b) 2.78 mol PbS (molar mass of PbS = 239.3 g/mol) ----g (c) 6.80 mol C4H10 (molar mass of C4H10 = 58.14 g/mol) ----g Then Divide Mass By Moles To Find Molar Mass. What is the identity of the halogen? A student has a sample of isopropanol (C3H7OH) that has a mass of 78.6 g. The molar mass of isopropanol is 60.1 g/mol. You must take the mass you have of I2 and multiply by the molar mass of I2.The limiting reagent is the substance of fewer moles. This unsaturation is in the form of double bonds, which react with iodine compounds. Molar mass is PbI 2 is 461.00894 g/mol. The exact term of the above molecular weight is “molar mass”, which is based on the atomic mass of each element. part (a) was used to calculate the molar mass of the metal M. In part (c) students proposed an experimental test that could be used to determine if MI 2 is an ionic solid, and then explained how the results of the test supported this claim. Challenge: A 0.179 g sample of an unknown halogen occupies 109 mL at 398 K and 1.41 atm. Germanium . What is the molar mass of monoclinic sulphur. Want to see the step-by-step answer? Water ionizes by the equation h2o(l)⇌h+(aq)+oh−(aq) the extent of the reaction is small in pure water and dilute aqueous solutions. moles of KMnO 4 = 23.7 g KMnO 4 x (1 mol KMnO 4 /158 grams KMnO 4) moles of KMnO 4 = 0.15 moles KMnO 4; Now the liters of solution is needed. How many moles of I2 will form 3.58 g of NI3? Now 0.29g of NaI = 0.29/149.9 = 0.0019 mole of NaI. This mole of NaI will produce the same mole of NaCl. Cite this record. * See Answer *Response times vary by subject and question complexity. Solid-state compatibility and melting relationships in the subsystem Al2O3‐MgAl2O4‐CaAl4O7 were studied by firing @inproceedings{Aza2000TernarySA, title={Ternary System Al 2 O 3 -MgO-CaO: Part II, Phase Relationships in the Subsystem. Iodine numbers are often used to determine the amount of unsaturation in fatty acids. If the components of air are N 2 78%, O 2 21%, A r 0.9% and C O 2 0.1 % by volume, the molar mass of air would be (nearest integer): MEDIUM. Question: A) Number Of Moles Of I2 Used By The Vitamin C Solution B) Moles Of Vitamin C Reacting With The I2 (I.e. Fluorine 3. View Answer. What mass of iodine, I2 (molar mass, 253.80 g/mol), must be used to prepare a 0.960 m solution if 100.0g of methanol, CH3OH, is used? The molar mass of I2 is 253.80 g/mol, and the molar mass of NI3 is 394.71 g/mol. I don't understand chemistry at all :( we did a lab called volumetric analysis of vitamin C and now I'm stuck on all of the calculation questions, any help would be greatly appreciated!! How many moles of isopropanol are contained in this sample? The balanced chemical reaction is: N2 + 3 I2 = 2NI3 We are given the amount of product formed. 0. Therefore the molar mass of I2 is 2 times that, or 253.8. +463 kJ/mol 3. So you need to add I2 molecule on the RHS. View Answer. check_circle Expert Answer.