Class 9 Exam > Class 9 Videos > Crash Course: Class 9 (Hinglish) > Fun Video: Mole Concept
Fun Video: Mole Concept Video Lecture | Crash Course: Class 9 (Hinglish)
FAQs on Fun Video: Mole Concept Video Lecture - Crash Course: Class 9 (Hinglish)
| 1. What is the mole concept in chemistry? |  |
Ans. The mole concept in chemistry is a fundamental concept that relates the mass of a substance to the number of particles it contains. It provides a way to quantify atoms, molecules, or ions in a sample.
| 2. How is the mole concept used in stoichiometry? | |
Ans. The mole concept is extensively used in stoichiometry, which is the calculation of the quantities of reactants and products in chemical reactions. It allows us to determine the ratio in which substances react or combine, as well as to calculate the amount of product formed from a given amount of reactant.
| 3. Can you explain Avogadro's number in relation to the mole concept? | |
Ans. Avogadro's number is a fundamental constant (6.022 × 10^23) that represents the number of particles (atoms, molecules, or ions) in one mole of a substance. It is used to convert between the mass of a substance and the number of particles it contains.
| 4. How is the mole concept used in determining empirical formulas? | |
Ans. The mole concept is employed in determining empirical formulas by comparing the ratios of the number of moles of different elements in a compound. From the masses or percentages of the elements in the compound, the mole concept helps to find the simplest whole-number ratio of atoms, which represents the empirical formula.
| 5. What is the significance of the mole concept in balancing chemical equations? | |
Ans. The mole concept is crucial in balancing chemical equations as it allows us to determine the stoichiometric coefficients needed to balance the equation. The coefficients represent the number of moles of reactants and products involved in the reaction, ensuring that the law of conservation of mass is satisfied.
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