Question 57

In the following reaction, the total number of oxygen atoms in X and Y is _______.
Na$$_2$$O + H$$_2$$O $$\to$$ 2X
Cl$$_2$$O$$_7$$ + H$$_2$$O $$\to$$ 2Y

Correct Answer: 5

Reaction 1: $$Na_2O + H_2O \to 2NaOH$$

So X = NaOH (1 oxygen atom per molecule)

Reaction 2: $$Cl_2O_7 + H_2O \to 2HClO_4$$

So Y = HClO₄ (4 oxygen atoms per molecule)

Total oxygen atoms in X and Y = 1 + 4 = 5.

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In the following reaction, the total number of oxygen atoms in X and Y is _______.Na$$_2$$O + H$$_2$$O $$\to$$ 2XCl$$_2$$O$$_7$$ + H$$_2$$O $$\to$$ 2Y