FeCl₂ + 2NH₄OH → Fe(OH)₂ + 2NH₄Cl
Answer:
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Answer:
Metalloids are metallic-looking brittle solids that are either semiconductors or exist in semiconducting forms, and have amphoteric or weakly acidic oxides. Typical nonmetals have a dull, coloured or colourless appearance; are brittle when solid; are poor conductors of heat and electricity; and have acidic oxides.
Explanation:
Answer:

Explanation:
Half time is period required to desintegrating the half of the initial number of atoms. Then, the total time is:

