Chemistry

Chemistry, 26.09.2019 11:20, briannaleiigh

What is the atomic weight of carbon

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Chemistry, 04.08.2019 11:30, jkersen8140

Ahypothetical element x has 3 naturally occurring isotopes: 41.20% of 21x, with an atomic weight of 21.016 amu, 50.12% of 22x, with an atomic weight of 21.942 amu, and 8.68% of 24x, with an atomic weight of 23.974 amu. on the basis of these data, calculate the average atomic weight of element x. report your answer to two decimal places.

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Chemistry, 10.09.2019 19:30, dantedelafuente

Hafnium has six naturally occurring isotopes: 0.16% of 174hf, with an atomic weight of 173.940 amu; 5.26% of 176hf, with an atomic weight of 175.941 amu; 18.60% of 177hf, with an atomic weight of 176.943 amu; 27.28% of 178hf, with an atomic weight of 177.944 amu; 13.62% of 179hf, with an atomic weight of 178.946 amu; . and 35.08% of 180hf, with an atomic weight of 179.947 amu. calculate the average atomic weight of hf. give your answer to three decimal places.

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Chemistry, 17.09.2019 18:10, ghernadez

2.3 zinc has five naturally occurring isotopes: 48.63% of 64 zn with an atomic weight of 63.929 amu; 27.90% of 66zn with an atomic weight of 65.926 amu; 4.10% of 67zn with an atomic weight of 66.927 amu; 18.75% of 68zn with an atomic weight of 67.925 amu; and 0.62% of 70zn with an atomic weight of 69.925 amu. calculate the average atomic weight of zn.

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