Flashcards for NEET Chemistry - Some Basic Concepts of Chemistry

Flashcards for NEET Chemistry are designed to boost your NEET preparation. Find below flashcards for the chapter “Some Basic Concepts of Chemistry”. These flashcards are prepared as per the NEET syllabus. These are helpful for aspirants of NEET and other exams during last-minute revision. It covers all the important points that are frequently asked in the exam. Check BYJU’S for the full set of Flashcards and Study material for NEET Chemistry.

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Chemistry

Some Basic Concepts of Chemistry

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Some Basic Concepts of Chemistry

°F (degree Fahrenheit)

Fahrenheit scale is represented between 32° to 212°

°F = 9/5(°C) + 32

Mole

One mole is the amount of a substance that contains as many particles as there are atoms in12 g of 12C isotope,

i.e. ‘Avogadro constant’, or Avogadro number NA = 6.022×1023

Molar Mass

The mass of one mole of a substance in grams. The molar mass in grams is numerically equal to atomic/molecular/formula mass in u (unified mass).

Percentage Composition

Percentage of a particular element present in a compound.

Mass % of an element =

(Mass of that element in the compound/Molar mass of the compound) × 100

Mass Percent

Mass percent = (Mass of solute/Mass of solution) x 100

Molarity

Molarity (M) = No. of moles of solute/ Volume of solution in litres

Molality

Molality (m) = No. of moles of solute/ Mass of solvent in kg

Mole Fraction

Mole fraction of A = No. of moles of A/ No. of moles of solutions = nA / (nA + nB)

Avogadro’s Law

Equal volumes of all gases at the same temperature and pressure should contain an equal number of molecules.

Mass and Weight

The mass of a substance is the amount of matter present in it.

Weight is the force exerted by gravity on an object.

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