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Answer chemistry homework?

1.A certain element consists of two stable isotopes.

The first has a mass of 62.9 amu and a percent natural abundance of 69.1 %.

The second has a mass of 64.9 amu and a percent natural abundance of 30.9 %.

What is the atomic weight of the element?_____ amu

2. The element antimony has an atomic weight of 122 and consists of two stable isotopes antimony-121 and antimony-123.

The isotope antimony-121 has a mass of 121 amu and a percent natural abundance of 57.3 %.

The isotope antimony-123 has a percent natural abundance of 42.8 %.

What is the mass of antimony-123? _______ amu

4.What is the mass of a dinitrogen monoxide molecule ?

_______ grams

5.What is the mass of a dinitrogen monoxide molecule ?

_______ grams

2 Answers

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  • kswck2
    Lv 7
    1 month ago

    Do your own homework-how else do you Learn?

  • Anonymous
    1 month ago

    move to homework help. damn cheater

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