NEET Exam > NEET Videos > Chemistry Class 11 > Solved Examples: Mole Concept
Solved Examples: Mole Concept Video Lecture | Chemistry Class 11 - NEET
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FAQs on Solved Examples: Mole Concept Video Lecture - Chemistry Class 11 - NEET
| 1. What is the mole concept in chemistry? |  |
Ans. The mole concept in chemistry is a way to measure and quantify atoms, molecules, or ions. It is based on the Avogadro's number, which states that one mole of any substance contains 6.022 × 10^23 particles. This concept helps in calculating the amount of a substance in a given sample or reaction.
| 2. How do you calculate the number of moles in a given mass of a substance? | |
Ans. To calculate the number of moles in a given mass of a substance, you need to divide the mass of the substance by its molar mass. The molar mass is the mass of one mole of a substance, expressed in grams. The formula to calculate the number of moles is: Moles = Mass of Substance (g) / Molar Mass (g/mol).
| 3. What is the relationship between the mole concept and the periodic table? | |
Ans. The mole concept is closely related to the periodic table as it helps in understanding the atomic masses and molar masses of elements. The atomic mass of an element, listed on the periodic table, represents the average mass of its atoms. By using the mole concept, one can convert the atomic mass of an element into its molar mass, which is expressed in grams/mol.
| 4. How can the mole concept be applied to chemical reactions? | |
Ans. The mole concept is essential in balancing chemical equations and determining the stoichiometry of reactions. It allows us to calculate the number of moles of reactants and products involved in a reaction. By comparing the mole ratios in the balanced equation, one can determine the limiting reagent, excess reagent, and the theoretical yield of a reaction.
| 5. Why is the mole concept important in chemistry? | |
Ans. The mole concept is fundamental in chemistry as it provides a way to count and measure atoms, molecules, or ions. It allows chemists to quantify the amount of a substance in a reaction, calculate its concentration, and understand the stoichiometry of chemical reactions. The mole concept is crucial for various calculations and conversions in analytical, physical, and organic chemistry.
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