# Chemistry Formulas for Class XI, XII and Under Graduates

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## Download Chemistry Formulas For Class XI , Class12 and Under Graduates

**Chemistry Formulas:**

**Ideal Gas law**

PV = nRT

n = number of moles

R = universal gas constant = 8.3145 J/mol K

**Boyle’s law **

P_{1}V_{1} = P_{2}V_{2}

**Mole fraction: Mole fraction of a component in solution is the number of moles of that component divided by the total number of moles of all components in the solution.**

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Please send me all formula of chemistry of 12 class. Numerical based like molarity etc.

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..:…………………………………………………………………

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abdullahshaheenkhan on 20 Jun 2011APPROXIMATE ATOMIC WEIGHT OF ELEMENT IS 26.89. ITS EQUIVALENT WEIGHT IS 8.9. WHAT IS THE EXACT ATOMIC WEIGHT OF THE ELEMENT.

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a. The radius of Noble gases are very large in comparison to the halogens

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