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Given that the abundacne of isotopes .^(...

Given that the abundacne of isotopes `.^(54)Fe`, `.^(56)Fe`, and `.^(57)Fe` is 5%, 90% and 5% respectively. The atomic mass of `Fe` is

A

55.85

B

55.95

C

55.75

D

56.05

Text Solution

Verified by Experts

The correct Answer is:
B
Atomic mass of iron
`=(54 xx 5 + 56 xx 90 + 57 xx 5)/100`
`=(270 + 5040 + 285)/100 = 55.95`
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Knowledge Check

  • Given that the abundances of isotopes .^(54)Fe, .^(56)Fe and .^(57)Fe are 5%, 90% and 5% respectively, the atomic mass of Fe is

    A
    55.85
    B
    55.95
    C
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    D
    56.05

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    B
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    C
    55.75u
    D
    56.05u

  • Given that the abundances of isotopes ""^(54)Fe, ""^(56)Fe and ""^(57)Fe 5%, 90% and 5%, respectively, the atomic mass of Fe is

    A
    55.85
    B
    55.95
    C
    55.75
    D
    56.05

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