cassie asked in Society & CultureLanguages · 8 months ago

atomicmass of2 stable isotopesof C,126C ( 98.90 percent)and 136C(1.100 percent),are12.0000 amuand13.0034 amu.Calculateaverageatomicmass of C?

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  • 8 months ago

    [This is not a question about Languages.  It needs moving to  All Categories > Science & Mathematics > Chemistry .]

    "atomic mass of 2 stable isotopes of C, 126C ( 98.90 percent) and 136C (1.100 percent), are 12.0000 amu and 13.0034 amu. Calculate average atomic mass of C."

    (0.9890 x 12.0000 amu) + (0.01100 x 13.0034 amu) = 12.01 amu

    [Note that the method used above only works when the given percentages add up to exactly 100%.]

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