Chemistry Exam > Chemistry Videos > Physical Chemistry > Introduction to Atomic weight, Molecular weight and Molar mass - Redox Reactions
Introduction to Atomic weight, Molecular weight and Molar mass - Redox Reactions Video Lecture | Physical Chemistry
FAQs on Introduction to Atomic weight, Molecular weight and Molar mass - Redox Reactions Video Lecture - Physical Chemistry
| 1. What is atomic weight? |  |
Ans. Atomic weight is the average mass of the atoms in a naturally occurring sample of an element. It takes into account the different isotopes of the element and their relative abundance. Atomic weight is expressed in atomic mass units (amu).
| 2. How is molecular weight calculated? | |
Ans. Molecular weight is calculated by summing up the atomic weights of all the atoms in a molecule. It is also known as the molecular mass and is expressed in atomic mass units (amu). For example, the molecular weight of water (H2O) is calculated by adding the atomic weights of two hydrogen atoms and one oxygen atom.
| 3. What is molar mass? | |
Ans. Molar mass is the mass of one mole of a substance. It is calculated by multiplying the atomic or molecular weight of a substance by the molar constant, which is approximately 6.022 x 10^23. Molar mass is expressed in grams per mole (g/mol).
| 4. How are atomic weight and molecular weight different? | |
Ans. Atomic weight refers to the average mass of the atoms of an element, taking into account different isotopes and their abundance. On the other hand, molecular weight is the sum of the atomic weights of all the atoms in a molecule. While atomic weight is specific to an element, molecular weight is specific to a molecule.
| 5. Why are atomic weight, molecular weight, and molar mass important in redox reactions? | |
Ans. Atomic weight, molecular weight, and molar mass are important in redox reactions because they help in determining the stoichiometry of the reaction. The balanced equation of a redox reaction provides the mole ratio between reactants and products. This ratio is crucial in calculating the amount of substances involved in the reaction and understanding the quantitative aspects of the redox process.
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