Answer:
19.6 g is the mass of methanol
Explanation:
Density of methanol is 0.787 g/mL.
Density means mass / volume
Methanol density = Methanol mass / Methanol volume.
Let's replace in the formula
0.787 g/mL = Methanol mass / 25 mL
0.787 g/mL . 25 mL = Methanol mass → 19.6 g
A sodium atom is more likely to react with a chlorine atom than a potassium atom.
The atoms of elements in the periodic table are arranged in groups and periods. The elements in the same group of the periodic table have similar reactivity.
We know that metals do not often combine with each other except in alloys. Metals of group 1 such as sodium and potassium do not form alloys hence they do not combine.
On the other hand, the electronegativity difference between sodium and chlorine is high. This causes the both of them to easily combine and form and ionic compound.
Learn more: brainly.com/question/11527546
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>
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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>
The answer is 207.2 grams.