"In 1897, J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged. In addition, he also studied positively charged particles in neon gas."
Source:abcte.org
Molarity : It is defined as the number of moles of solute present in one liter of solution.
Therefore, the molarity of solution is 3.33
<span>The law of definite composition essentially states that a chemical compound always contains exactly the same proportion of elements by mass.
As an example, take water, H2O. In one mole you have 2 mole H and 1 mol O. By mass, you have 2 g H and 16 g O (total 18 g). The ratio by mass is 2:16 or 1:8 for H to O ratio.
In another way, H is about 11% and O is about 89% by mass. It doesn't matter how much water you have (1 g, 1000 g, 34 moles), this ratio will always be the same.</span>
Answer:
Mole fraction H2: 0.625
Mole fraction O2: 0.375
Molecular weight: 13.25g/mol
Mass fraction H2: 0.094
Mass fraction O2: 0.906
Explanation:
Moles fraction is defined as the ratio between moles of a substance and total moles presents in a mixture:
<em>Mole fraction H2 = 5kmol / (5kmol + 3kmol) = </em><em>0.625</em>
<em>Mole fraction O2 = 3kmol / (5kmol + 3kmol) = </em><em>0.375</em>
<em />
Molecular weight is defined as the mass per mole of substance:
Mass H2 = 5kmol * (2kg / kmol) = 10kg
Mass O2 = 3kmol * (32kg / kmol) = 96kg
<em>Molecular weight:</em>
106kg / 8kmol = 13.25g/mol
In the same way, mass fraction is the ratio between mass of a substance and total mass of the mixture:
<em>Mass fraction H2 = 10kg / (10kg + 96kg) = </em><em>0.094</em>
<em>Mass fraction O2 = 96kg / (10kg + 96kg) = </em><em>0.906</em>
That's because <span>the specific heat capacity of water is higher than specific heat capacity of iron, meaning that the water would need to lose more heat energy to drop its temperature.</span>