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Mole Concept — Flashcards

Telangana Open School (TOSS) · Class 12 · Chemistry

30 flashcards for Mole Concept (Telangana Open School (TOSS) Class 12 Chemistry) to test yourself on key terms and facts.

51 questions30 flashcards7 formulas & key relations4 concepts

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30 Flashcards·
Mole ConceptAvogadro's ConstantMole and Number of ParticlesMolar MassMole-Mass ConversionMole to Number ConversionMass from MolesMolar Volume
Card 1Mole Concept

Define mole in terms of carbon-12.

Answer

A mole is the amount of substance that contains as many elementary entities (atoms, molecules, etc.) as there are atoms in exactly 12 grams of carbon-12.

Card 2Avogadro's Constant

What is Avogadro's constant? Give its value.

Answer

Avogadro's constant (Nₐ) is the number of particles in one mole of a substance. Its value is 6.022 × 10²³ mol⁻¹.

Card 3Mole and Number of Particles

How many atoms are in 1 mole of carbon?

Answer

1 mole of carbon contains 6.022 × 10²³ atoms.

Card 4Molar Mass

What is the molar mass of oxygen gas (O₂)?

Answer

Atomic mass of O = 16 g/mol. O₂ has two oxygen atoms. So, molar mass = 2 × 16 = 32 g/mol.

Card 5Mole-Mass Conversion

Calculate the number of moles in 58.5 g of NaCl.

Answer

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol. Using formula: n = mass / molar mass = 58.5 / 58.5 = 1 mol.

Card 6Mole to Number Conversion

How many molecules are in 0.5 mol of water (H₂O)?

Answer

Number of molecules = moles × Avogadro's constant = 0.5 × 6.022 × 10²³ = 3.011 × 10²³ molecules.

Card 7Mass from Moles

What is the mass of 2 moles of CO₂?

Answer

Molar mass of CO₂ = 12 + (2×16) = 44 g/mol. Mass = moles × molar mass = 2 × 44 = 88 g.

Card 8Molar Volume

Define molar volume of a gas at STP.

Answer

Molar volume is the volume occupied by 1 mole of any gas at standard temperature and pressure (STP: 273 K, 1 bar). It is 22.7 L/mol.

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Frequently Asked Questions

What are the important topics in Mole Concept for Telangana Open School (TOSS) Class 12 Chemistry?
Key topics in Mole Concept include SI Units and Need for Mole, Avogadro's Constant and Mole, Atomic, Molecular, and Molar Mass, Mole, Mass, and Number Relationships. Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How many flashcards are available for Mole Concept?
There are 30 flashcards for Mole Concept covering key definitions, facts and ideas. A few sample cards are shown on this page.
How should I revise Mole Concept for the Telangana Open School (TOSS) Class 12 board exam?
Learn the core ideas first, then work through the 51 practice questions on Mole Concept. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All Telangana Open School (TOSS) Class 12 Chemistry Flashcards

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