How many number of moles are equilent 8 moles of carbon dioxide
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The formula for calculating moles of a substance when given mass in grams is:
n=m/M, where:
n=moles=?, m=given mass=8g CO2, M=molar mass=1*12g/mol C+ 2*16g/mol O=44g/mol CO2
Since M is a fraction, it can be divided by multiplying by its reciprocal, 1mol CO2/44g CO2. This will make it easier to see that grams cancel, leaving moles.
n=8 g CO2 x (1 mol CO2/44 g CO2) = 0.18 mol CO2 = 0.2 mol CO2 to one significant figure
Use this formula whenever you are asked to convert a given mass in grams to moles.
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