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FAQs on Mole concept - Additional Documents & Tests for IIT JAM

1. What is the mole concept in chemistry?
Ans. The mole concept in chemistry refers to the unit of measurement used to count atoms, molecules, or ions. One mole of any substance contains Avogadro's number (6.022 x 10^23) of particles. It allows chemists to relate the mass of a substance to the number of particles present.
2. How is the mole concept applied in stoichiometry?
Ans. The mole concept is crucial in stoichiometry, which is the study of the quantitative relationships between reactants and products in chemical reactions. By using the mole concept, we can determine the amount of each substance involved in a reaction and predict the amount of product formed.
3. What is the formula to calculate the number of moles in a given mass of a substance?
Ans. The formula to calculate the number of moles in a given mass of a substance is: Number of moles = Mass of substance / Molar mass Here, the molar mass represents the mass of one mole of the substance and is expressed in grams per mole.
4. How can the mole concept be used to convert between mass and number of particles?
Ans. The mole concept allows us to convert between mass and number of particles. By using the molar mass of a substance, we can determine the number of moles. From there, we can use Avogadro's number to convert the number of moles to the number of particles. Likewise, we can convert the number of particles to mass by reversing the process.
5. Why is the mole concept important in chemical calculations?
Ans. The mole concept is important in chemical calculations because it provides a way to quantify and relate the amount of substances involved in a reaction. It allows chemists to determine the limiting reactant, calculate the theoretical yield of a reaction, and perform various stoichiometric calculations necessary for analyzing and predicting chemical reactions.
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