Saturday, June 13, 2026

Essential Chemistry Formulas & Concepts

Gas & Volume Relations  

- 1 mol of gas = 24 dm³ (at room temperature & pressure).  

- 1 dm³ = 1000 cm³.  

Concentration  

Concentration = Moles/Volume  

Mole Calculations  

Moles = Mass/M_r  

- M_r = Relative Molecular Mass.  

Percentage Yield  

Percentage Yield = Actual Yield/Calculated Yield x 100

Avogadro’s Constant  

N_A = 6.02 x 10^{23}  

- Number of particles (atoms, molecules, ions) in 1 mole.  

Percentage Purity  

Percentage Purity = Mass of Pure/Mass of Impure x 100

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