SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many molecules of oxygen, O2, are needed for the complete conbustion of two moles of buane
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2
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10
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8
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13
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Explanation:
Detailed explanation-1: -Each mole of butane needs 6.5 moles of oxygen, so 13 moles of oxygen is required for 2 moles of butane in a complete combustion.
Detailed explanation-2: -Then total moles for For 2 moles of butane 13 mole of O 2 as 13+5=18.
Detailed explanation-3: -Examine the moles of butane and oxygen used in the reaction and then relate them. You can observe in the above reaction that, 132 moles of oxygen are required for combustion of 1 mole of butane.
Detailed explanation-4: -5 moles required according to balanced reaction.
Detailed explanation-5: -So, 2moles of O2 contains 2× 6.023×10^23 molecule= 12.046 ×10^23 molecule .
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