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`O_(2)` के `12.044xx10^(23)` अणुओं का द्रव्यमान क्या होगा यदि `O_(2)` का मोलर द्रव्यमान 32 ग्राम है ?

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`O_(2)` के मोल `(n)=("कणों की संख्या")/("6.022xx10^(23))=(12.044xx10^(23))/(6.022xx10^(23))=2`
`O_(2)` का द्रव्यमान `(m)=" मोल (n)"xx" मोलर द्रव्यमान (M)"=2xx32=64" ग्राम "`

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