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    can some one explain to me this question and the answer is D
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    Since you have 2.8g of the molecule with an Mr of 28, that means you have 0.1 mole, equivalent to 0.6X10^23 molecules, each molecule has 6 atoms, 2C and 4H so that means that 0.6X6X10^23=3.6X10^23
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    (Original post by alkyone)
    Since you have 2.8g of the molecule with an Mr of 28, that means you have 0.1 mole, equivalent to 0.6X10^23 molecules, each molecule has 6 atoms, 2C and 4H so that means that 0.6X6X10^23=3.6X10^23
    so you mean (0.1*6)*6.0x10^23, thanks i just checked nad its right thanks.
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    No problem
 
 
 
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