chemistry.

Methane, CH4 burns in oxygen gas to form carbon dioxide and water. How many moles of carbon dioxide will be formed from 8.0g of methane?

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  1. CH4 + 2O2 ==> CO2 + 2H2O
    Convert 8.0 g CH4 to moles. moles = grams/molar mass.
    8.0/16 = 0.5 mole CH4.
    Now look at the equation. The equation tells us that 1 mole CO2 is formed for 1 mole CH4; therefore, 0.5 mole CO2 will be formed by 0.5 mole CH4.

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  2. Hey so not too hard.
    1. write the balanced equation: CH4+2O2->CO2+2H2O
    2. convert 8.g of CH4 to moles (n=m/M): 8.0/16=0.5 mole CH4
    3. refer to the above equation- it states that 1 mole CO2 is formed for 1 mole CH4 (giving the ratio 1:1) and therefore, means 0.5 mole CO2 will be formed by 0.5 mole CH4

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