Chemistry

Chemistry, 02.08.2019 16:30, heberavilesramirez52

How many grams of strontium are in 2.92 moles of strontium

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Chemistry, 19.07.2019 21:00, seanisom7

The quantity, q grams, of the radioactive isotope strontium-90 present in a sample decreases by half over a period of about t = 28.8 years. if a sample initially contains 3 grams of strontium-90, what equation represents the relationship between q and t?

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Chemistry, 20.07.2019 09:30, itssmookie129

How many grams of strontium (sr, 87.62 g/mol) are in 2.92 moles of strontium?

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Mathematics, 02.08.2019 20:10, ManBun99

Strontium 90 is a radioactive material that decays according to the function upper a left parenthesis t right parenthesis equals upper a 0 e superscript negative 0.0244 t baseline comma where upper a 0 is the initial amount present and a is the amount present at time t (in years). assume that a scientist has a sample of 400 grams of strontium 90. (a) what is the decay rate of strontium 90? (b) how much strontium 90 is left after 10 years? (c) when will only 300 grams of strontium 90 be left? (d) what is the half-life of strontium 90?

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Physics, 30.09.2019 21:00, oofdiegoofdie5562

2. a 2.5 gram sample of an isotope of strontium-90 was formed in a 1960 explosion of an atomic bomb at johnson island in the pacific test site. the half-life of strontium-90 is 28 years. in what year will only 0.625 grams of this strontium-90 remain?

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