Chemistry
Which of the following methods is used in determining the number average molar mass of a macromolecule

Light scattering
Osmotic pressure
Sedimentation equilibrium
Viscosity

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Chemistry
Ammonial is a mixture of

Aluminium powder and ammonium sulphate
Aluminium powder and ammonium chloride
Aluminium powder and ammonium nitrate
Aluminium powder and potassium nitrate

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