The number of moles of carbon dioxide which contain 8 g of oxygen is:

0.5 mol

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0.20 mol

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0.40 mol

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0.25 mol

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Solution

The correct option is B. 0.25 mol
One mole of $C O_{2}$ contains 32 g of Oxygen
So, 32g of oxygen = 1mole of carbon dioxide
1g of oxygen = 1/32 mole of carbon dioxide
8 g of oxygen = $\frac{8 \times 1}{32}$ = 0.25 mol

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The number of moles of carbon dioxide which contain 8 g of oxygen is:

The correct option is B. 0.25 molOne mole of CO2 contains 32 g of OxygenSo, 32g of oxygen = 1mole of carbon dioxide 1g of oxygen = 1/32 mole of carbon dioxide 8 g of oxygen = 8×132 = 0.25 mol

The correct option is B. 0.25 mol
One mole of $C O_{2}$ contains 32 g of Oxygen
So, 32g of oxygen = 1mole of carbon dioxide
1g of oxygen = 1/32 mole of carbon dioxide
8 g of oxygen = $\frac{8 \times 1}{32}$ = 0.25 mol