The number of molecules present in 8 g of oxygen gas is …………….
The number of molecules present in 8 g of oxygen gas is …………….
(A) 6.022 × 1023
(B) 3.011 × 1023
(C) 12.044 × 1023
(D) 1.505 × 1023
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(D) \(1.505 × 10^{23}\)
Molar mass of oxygen gas = 32g/mol.
\(\therefore \) Number of moles oxygen molecule in \(8g=\frac{8g}{32g/mol}=0.25\) mole
\(\therefore \) Number of moles oxygen molecules in 0.25 mole = \(0.25\times6.022\times10^{23}\)
= \(1.505\times10^{23}\) oxygen molecule.
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