Answer:B is right
Explanation: Al loses electrons and is oxidised, Au gains electron. And is reduced
Answer: 2 moles of
will be formed.
Explanation:
To calculate the moles :

The balanced chemical equation is:
According to stoichiometry :
2 moles of
give = 2 moles of 
Thus 2 moles of
give =
of 
Thus 2 moles of
will be formed.
Answer:
B
Explanation:
When nitrogen and aluminum form an ionic bond, the formula of the ionic compound is AlN. Aluminum forms a cation Al⁺³ and nitrogen forms an anion N⁻³. When each cation of Al⁺³ combines with an anion of N⁻³, AlN or aluminum nitride is formed
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Answer:
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Explanation:
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