17 Questions
What is the mole fraction of a component defined as?
Number of moles of the component divided by the total number of moles of all the components
In a binary mixture, if the number of moles of A and B are nA and nB respectively, what is the mole fraction of A?
nA / (nA + nB)
What is the sum of all the mole fractions in a given solution?
1
What is the unit of mole fraction?
Dimensionless
In a solution containing i number of components, how is the mole fraction of a component calculated?
ni / (n1 + n2 + ... + ni)
What is the mole fraction of ethylene glycol (C2H6O2) in a solution containing 20% of C2H6O2 by mass?
0.4
What is the mole fraction of glycol in a solution that contains 0.322 mol of glycol and 4.444 mol of water?
0.068
What is the mole fraction of water in a solution that contains 0.322 mol of glycol and 4.444 mol of water?
0.932
If the mole fraction of glycol is 0.068, what is the mole fraction of water in the same solution?
0.932
What is the relationship between the mole fraction of a component and the total number of moles of all components in a solution?
The mole fraction of a component is the ratio of the number of moles of that component to the total number of moles of all components.
Can the mole fraction of a component be greater than 1?
No, because the mole fraction is a ratio.
Why is the mole fraction of a component important in chemistry?
It is a measure of the ratio of the number of moles of the component to the total number of moles of all components.
What is the mole fraction of benzene in vapour phase if 80 g of benzene is mixed with 100 g of toluene?
0.556
What is the proportion of oxygen in air by volume at 298 K?
20%
What is the Henry's law constant for oxygen at 298 K?
3.30 × 10^7 mm
What is the i value of CaCl2?
2.47
What is the total pressure of the air at 298 K?
10 atm
Understand the concept of mole fraction in chemistry, including its definition, formula, and examples. Learn how to calculate mole fraction in a binary mixture and a solution with multiple components.
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