CHEM 1030 Lecture Notes - Lecture 40: Lewis Structure, Novella, Elastic Collision

• School: Auburn University
• Department: Chemistry
• Course: CHEM 1030
• Professor: Ria Yngard

Document Summary

Practice problems: a 5. 00 l tank at 2. 96 c is filled with 8. 94 g of bf3 (67. 82 g/mol) gas and 14. 2 g of co (28. 01 g/mol). Calculate the mole fraction and partial pressure of each gas, and the total pressure in the tank. Xi = ni / ntotal: use the given mass to find the number of moles for each gas. 8. 94 g bf3 x 1 mol bf3 = 0. 132 mol bf3. 14. 2 g co x 1 mol co = 0. 507 mol co. 28. 01 g co: now add the found moles together to find the total amount of moles in the tank. 0. 639 mol: we use pv = nrt to find the pressure that is in the tank. P x 5. 000 l = 0. 639 mol x 0. 08206 l-atm/mol-k x 276 k. Ptotal = 2. 89 atm: now that we have the total pressure we can use it and the mole fraction to find the partial pressure given this equation: