Chemistry

Chemistry, 25.08.2019 20:30, coreen9

Explain how cobalt-60 and cobalt -59 can be the same element but have different mass numbers

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Mathematics, 06.07.2019 08:10, hemaam8

The mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e^ −0.1315 t . 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60.

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Chemistry, 13.07.2019 14:40, aly2008

Cobalt, a transition metal, forms both the co2+ and co3+ ions. which of the following are the correct formulas and names for the oxides formed by the two different ions? (you’ll have to choose more than one) a) coo3, cobalt(iii) oxide b) coo3, cobalt(ii) oxide c) co2o3, cobalt(iii) oxide d) coo3, cobalt(ii) oxide e) coo3, cobalt(iii) trioxide f) coo, cobalt(ii) oxide g) co2o, cobalt(ii) oxide h) co2o, cobalt(iii) oxide

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Chemistry, 22.08.2019 13:30, keishlav5183

The average atomic mass recorded on the periodic table for cobalt is 58.933 u. this indicates that the most abundant isotope of cobalt is a.) cobalt-57 b.) cobalt-58 c.) cobalt-59 d.) cobalt-60

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Explain how cobalt-60 and cobalt -59 can be the same element but have different mass numbers...

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