Element X react with oxygen to produce a pure sample of X 2 O 3 . In an experiment it is found that 1.00 g of X produces 1.16 g of X 2 O 3 . Calculate the atomic weight of X . Given atomic wei

Question

Element X react with oxygen to produce a pure sample of X 2 ​ O 3 ​ . In an experiment it is found that 1.00 g of X produces 1.16 g of X 2 ​ O 3 ​ . Calculate the atomic weight of X . Given atomic weight of oxygen, 16.0 g mol -1 .

TestHub · Accepted Answer

Question Explanation:

Question is asking about atomic weight of X.

Concept:

This question is based on stoichiometry.

Solution:

$2 X + \frac{3}{2} O_{2} \to X_{2} O_{3}$

Apply the Principle of Atom Conservation (POAC) on X:

Moles of X = $2 \times$ Moles of X₂O₃

$\frac{1}{M} = \frac{2 \times 1.16}{2 M + 48}$

$M = 150$

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