Linolenic acid (C18H30O2 - M.W. = 278.42 g/mol) reacts with hydrogen gas according to the equation: C18H30O2 + 3H2 (g) → C18H36O2 What volume of hydrogen gas, as measured at P = 1.00 atm and T = 273.15 K, is required to react with 10.5 g of linolenic acid in this reaction?

2.53 L is the volume of H₂ needed

Explanation:

The reaction is: C₁₈H₃₀O₂ + 3H₂ → C₁₈H₃₆O₂

By the way we can say, that 1 mol of linolenic acid reacts with 3 moles of oxygen in order to produce, 1 mol of stearic acid.

By stoichiometry, ratio is 1:3

Let's convert the mass of the linolenic acid to moles:

10.5 g . 1 mol / 278.42 g  = 0.0377 moles

We apply a rule of three:

1 mol of linolenic acid needs 3 moles of H₂ to react

Then, 0.0377 moles will react with (0.0377 . 3 )/1 = 0.113 moles of hydrogen

We apply the Ideal Gases Law to find out the volume (condition of measure are STP) → P . V = n . R . T → V = ( n . R .T ) / P

V = (0.113 mol . 0.082 L.atm/mol.K . 273.15K) 1 atm = 2.53 L

Hey There!_____________________________________IONIZATION ENERGY:

ionization energy or ionization energy is the minimum amount of energy required to remove the valence electron i.e. the outmost orbital electron.

_____________________________________Magnesium Electronic Configuration: _____________________________________Aluminum Electronic Configuration:

_____________________________________Question:

Why does magnesium has more ionization energy than Aluminum?

Reason:

Aluminum's has one unpaired electron in it's Valence energy orbital i.e. 3p. the electrons are not paired that means it has only electron in the last orbital that's why it is written as , and Magnesium's Valence Energy Orbital i.e. 3s. the electrons are paired that means it has 2 electron that's why it is written as . It is energetically favorable for all the electrons in an orbital to be paired, which means that breaking up this pair would require more energy, that is why magnesium has more ionization energy. The Aluminum does not have paired electrons thus they are removed much easily than the paired electrons in the Magnesium.

_____________________________________Best Regards,'Borz'