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Calculate the atomic mass (average) of c...

Calculate the atomic mass (average) of chlorine using the following data:
`{:(,%" Natural Abundance", "Molar Mass "),(""^(35)Cl ,75.77 ,34.9689),( ""^(37)Cl ,24.23 ,36.9659 ):}`

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Fractional abundabce of `.^(35)Cl=0.7577`,
Molar mass `=34.9689`
Fraction abundance of `.^(37)Cl=0.2423`,
Molar mass`=36.9659`
`:.` Average atomic mass
`=(0.7577)(34.9689 am u)+(0.2423)(36.9659 am u)`
`=26.4959+8.9568=35.4527`
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