If electronegativity difference between atoms is much higher then they form ionic bond.
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The correct answer among the choice listed is the third option. The reaction between silver nitrate and potassium hydroxide will yield a precipitate which is the silver hydroxide product. This is because this substance is not very soluble in aqueous solution.
4Al + 3O2 --> 2Al2O3
(5.23mol Al)(2mol Al2O3/4mol Al) = 2.62mol Al2O3
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Answer: Sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as gas, liquid or a solid