Water can be synthesized by burning ______________________ in air.

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Solution

Water:
Water is a compound that is made up of hydrogen and oxygen atoms.
Water can be synthesized by burning hydrogen in the air.
The chemical reaction can be depicted as:
$2 H_{2} (g) + O_{2} (g) \to 2 H_{2} O (l) (Hydrogen) (Oxygen) (Water)$
The structure of water is given below:
Thus, Water can be synthesized by burning hydrogen in the air.

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