A) 0.02
B) \[3.125\times {{10}^{-2}}\]
C) \[1.25\times {{10}^{-2}}\]
D) \[2.5\times {{10}^{-2}}\]
Correct Answer: B
Solution :
\[M{{g}_{3}}{{(P{{O}_{4}})}_{2}}=1\,mole\] 8 moles of 0-atom are contained by 1 mole \[M{{g}_{3}}{{(P{{O}_{4}})}_{2}}\] Hence, 0.25 moles of 0 atom\[=\frac{1}{8}\times 0.25\] \[=3.125\times {{10}^{-2}}\]
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