Please help, I\'m confused on this problem in my homework, it\'s an online homew
ID: 971491 • Letter: P
Question
Please help, I'm confused on this problem in my homework, it's an online homework and this is the last question before I can hit submit, thank you so much! Part A What is the mole fraction of O2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g H2? Part B What is the mole fraction of N2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g of H2? Part C What is the mole fraction of H2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g of H2? Part D What is the partial pressure in atm of O2 of this mixture if it is held in a 15.60-L vessel at 17 degC? Part E What is the partial pressure in atm of N2 of this mixture if it is held in a 15.60-L vessel at 17 degC? Part F What is the partial pressure in atm of H2 of this mixture if it is held in a 15.60-L vessel at 17 degC? Please help, I'm confused on this problem in my homework, it's an online homework and this is the last question before I can hit submit, thank you so much! Part A What is the mole fraction of O2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g H2? Part B What is the mole fraction of N2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g of H2? Part C What is the mole fraction of H2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g of H2? Part D What is the partial pressure in atm of O2 of this mixture if it is held in a 15.60-L vessel at 17 degC? Part E What is the partial pressure in atm of N2 of this mixture if it is held in a 15.60-L vessel at 17 degC? Part F What is the partial pressure in atm of H2 of this mixture if it is held in a 15.60-L vessel at 17 degC? Please help, I'm confused on this problem in my homework, it's an online homework and this is the last question before I can hit submit, thank you so much! What is the mole fraction of O2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g H2? Part B What is the mole fraction of N2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g of H2? Part C What is the mole fraction of H2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g of H2? Part D What is the partial pressure in atm of O2 of this mixture if it is held in a 15.60-L vessel at 17 degC? Part E What is the partial pressure in atm of N2 of this mixture if it is held in a 15.60-L vessel at 17 degC? Part F What is the partial pressure in atm of H2 of this mixture if it is held in a 15.60-L vessel at 17 degC?Explanation / Answer
a) First you need to convert all the masses to moles (divide the given mass by the molar mass).
molar mass O2 = 31.9988
15.1 / 31.9988 = 0.4719 moles O2
molar mass N2 = 28.0134
8.16 / 28.0134 = 0.2913 moles N2
molar mass H2 = 2.01588
2.46 / 2.01588 = 1.2203 moles H2
Add all the moles together, and you have a total of 1.9835 moles. From there, you can use the formula Mole Fraction = moles A / total moles.
So...
O2: 0.4719/1.9835 = 0.2379 ---------------- PART A Answer
N2: 0.2913/1.9835 = 0.1468 ---------------- PART B Answer
H2: 1.2203/1.9835 = 0.6153 --------------- PART C Answer
(to check if it's correct, you can go back and make sure the fractions all add up to equal 1)
B) Using the moles fractions from A, you can determine partial pressure by mole fraction (X) times total pressure (P).
P = nRT/V
n = number of moles (1.9835)
R = gas constant (0.0821)
T = temp in Kelvin (17 celcius is 290.15 K)
V = volume in liters (15.60)
P=[(1.9835)(.0821)(290.15)]/15.60 = 3.0288 atm
O2: (0.2379)*(3.0288) = 0.7205 atm ---------------- PART D Answer
N2: (0.1468)*(3.0288) = 0.4446 atm ---------------- PART E Answer
H2: (0.6153)*(3.0288) = 1.8636 atm ---------------- PART F Answer