A flask contains 4.4 g of CO2 gas. Calculate
(a) How many moles of CO2 gas does it contain?
(b) How many molecules of CO2 gas are present in the sample?
(c) How many atoms of oxygen are present in the given sample? (Atomic mass of C = 12 u, O = 16 u)
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Answer:
Moles of CO2 = Given mass / Molecular mass of CO2 = 4.4 / 44 = 0.1 mole. 3) 44 gram (molecular wt of CO) contains 2 moles atom of oxygen therefore 4.4 gram of CO2 will contain = 2 /44 *4.4 = 0.2 moles atom of Oxygen.
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