If the mole fraction of sulfuric acid H2SO4 is 0.432 what is the percent by mass of H2SO4.
1 answer:
Answer:
19.47%
Explanation:
<em>The percentage by mass of </em><em> would be </em><em>19.47%</em><em>.</em>
The percentage by mass of a substance in solution is calculated as:
Given that the mole fraction of = 0.432
The total number of mole fraction of a solution = 1
Hence, mole fraction of water = 1 - 0.432 = 0.568
Mass of water = molar mass x mole
= 98.079 x 0.432 = 42.37 g
Mass of = molar mass x mole
= 18.02 x 0.568 = 10.24 g
Hence,
<em>%mass of</em> =
= 19.47%
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Explanation:
As a neutral lithium atom contains 3 protons and its elemental charge is given as . Hence, we will calculate its number of moles as follows.
Moles =
=
= 100 mol
According to mole concept, there are atoms present in 1 mole. So, in 100 mol we will calculate the number of atoms as follows.
No. of atoms =
= atoms
Since, it is given that charge on 1 atom is as follows.
=
Therefore, charge present on atoms will be calculated as follows.
Thus, we can conclude that a positive charge of is in 0.7 kg of lithium.