Answer. Mole fraction =number of moles of one component÷totalnumber of moles of all the component. that means it is the ratio of same quantity that is moles so it get cancelled out the units.
Does mole fraction has any unit?
Mole fraction is a unit of concentration, defined to be equal to the number of moles of a component divided by the total number of moles of a solution. Because it is a ratio, mole fraction is a unitless expression.
Which of the following terms are not having units?
Mole fraction is the ratio of moles of one component to the total number of moles. Thus has no units. 4. Mass percent is the ratio of mass of one component to the total mass.
What is the mole fraction x a unit of?
In chemistry, the mole fraction or molar fraction (xi) is defined as unit of the amount of a constituent (expressed in moles), ni divided by the total amount of all constituents in a mixture (also expressed in moles), ntot:.
Which of the following property has no units?
Electronegativity has no units. It is the tendency of an element to attract the shared pair of electrons in a covalent bond towards it. It is described on some scales like Pauling scale which has no units.
What is the mole fraction symbol?
The symbol for the mole fraction is the lower-case Greek letter chi, χ. You will often see it with a subscript: χsolute is an example.
What is mole fraction used for?
Mole fraction describes the number of molecules (or moles) of one component divided by total the number of molecules (or moles) in the mixture. Mole fraction is useful when two reactive components are mixed together, as the ratio of the two components is known if the mole fraction of each is known.
What has no unit?
Explanation: Strain is a good example, because it is the ratio of original length to extended length, the units cancel and it is dimensionless. This is the correct term for ‘having no units’. Coefficients of friction also fall into this category.
What is the unit of molality?
The units of molality are m or mol/kg.
Which one of the following units is a fundamental unit?
Ampere is the fundamental unit whereas other options are unit of derived quantities.
How do you calculate Molality?
The formula for molality is m = moles of solute / kilograms of solvent. In problem solving involving molality, we sometimes need to use additional formulas to get to the final answer. One formula we need to be aware of is the formula for density, which is d = m / v, where d is density, m is mass and v is volume.
Are mole percent and volume percent the same?
Volume percents characterize the composition of gas mixtures. … According to this law, the volume is proportional to the number of moles of a gas, and therefore, the mole percentage is the same as the volume percents for gas mixtures.
What is the unit of electron gain enthalpy?
The electron gain enthalpy refers to the amount of energy that gets released upon the acceptance of an atom from any neutral isolated gaseous atom to form a negative gaseous ion (anion) in the process. It is often represented as ΔHeg and is measured in the unit of electron volts per atom or kJ per mole (kJ/mol).
What is the unit of metallic character?
Metallic character depends on the ability of an element to lose its outer valence electrons. Examples of properties related to metallic character include thermal and electrical conductivity, metallic luster, hardness, ductility, and malleability. The most “metallic” element is francium, followed by cesium.
Which of the following is the unit of normality?
Key Takeaways. Normality is a unit of concentration of a chemical solution expressed as gram equivalent weight of solute per liter of solution. A defined equivalence factor must be used to express concentration. Common units of normality include N, eq/L, or meq/L.