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Oxana [17]
3 years ago
10

If environmental scientists want to publish a paper on an experiment for an audience of fellow speacialist where do they do so

Chemistry
2 answers:
marusya05 [52]3 years ago
7 0
It could be A or C
it depends on the subject of the experiment
aliina [53]3 years ago
5 0
It would be c. Newspaper story
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Which of the following polyatomic ions has a 3- ionic charge?
ch4aika [34]

Answer: Option (a) is the correct answer.

Explanation:

Poly means many and polyatomic ions means an ion(s) with two or more different atoms.

Out of the given options, phosphate ion is the polyatomic ion which has an ionic charge of 3-.

The formula depicting a phosphate ion is PO_{4}^{3-}.

Whereas Nitrate, Sulfate, Hydroxide , Bicarbonate does not carry or have a 3- ionic charge.

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The half life of radium-226 is 1600 years. If you have 200 grams of radium today how many grams would be present in 8000 years?
Sveta_85 [38]

Answer:

Half life is the time taken by a radio active isotope to reduce by half of its original amount. Radium-226 has a half life of 1602 years meaning that it would take 1602 years for a mass of radium to reduce by half.

Number of half lives in 9612 years = 9612/1602 = 6 half lives

New mass = Original mass x (1/2)n where n is the number of half lives.

Therefore, New mass= 500 x (1/2)∧6

                                 = 500 x 0.015625

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Hence the mass of radium after 9612 years will be 7.8125 grams.

Explanation:

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a pure compound because an element is untouched and is just itself

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