If a bromine atom is available in the form of, say two isotopes, 79/35 Br (49.7%) and 81/35 Br (50.3%), calculate the average atomic mass of the bromine atom.

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TextAtomic Mass and Atomic Mass Unit

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1u or 1 amu means

Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them.

Chemical Formula of Compounds

Rules for Writing Chemical Formulae

Atomic Mass and Atomic Mass Unit

Mass of one atom of oxygen is