From 200 mg of CO2, 10^21 molecules are removed. How many moles of CO2 are left?

Chirag Gupta

3 years ago

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Given mass of CO₂ = 200 mg = 0.2 g

Molar mass of CO₂ = 44 g/mol

Number of moles of 200 mg CO₂ = Given mass/Molar mass of CO₂

= 0.2 g/44 g mol^-1 = 0.00454 mole

Number of molecules of CO₂ removed = 10²¹

Number of moles of CO₂ removed = 10²¹/(6.022*10²³) = 0.00166 mole

Number of moles of CO₂ left = 0.00454 – 0.00166 = 0.00288 mole

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