Chemistry

On another planet, the isotopes of titanium have the following natural abundances.
Isotope 46Ti Abundance 70.900% Mass(amu) 45.95263

Isotope 48Ti Abundance 10.000% Mass(amu) 47.94795

Isotope 50Ti Abundance 19.100% Mass(amu) 49.94479

What is the average atomic mass of titanium on that planet?

I got 46.9 amu but it is wrong.

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asked by Anon
  1. (45.95263*0.7090) + (47.94795*0.10) + (49.9479*0.191) = ?

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    posted by DrBob222
  2. 15.64

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  3. i have no idea

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  4. You forgot your significant figures.

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    posted by PooFace
  5. 46.70 amu

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    posted by V
  6. .70900 x 45.95263 = 32.580
    .10000 x 49.94479 = 4.7948
    .19100 x 49.94479 = 9.5395
    *(Be aware that these answers must have 5 significant figures)

    32.580 + 4.7948 + 9.5395 = 46.918
    *(Be aware that the final answer must go to 3 decimal places)

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