Chemistry

Chemistry, 11.10.2019 03:00, myaaa13754

How do you find half life like i know the formula with 1/2 but how do you know how many times you do it

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Physics, 05.07.2019 21:20, Britney8394

It is known that the mass, m(t), of a radio-active substance decreases as it decays, and that the equation governing this is m′(t)=−0.015m(t) where t is in years. what is the half-life? (hint: find an exponential function which solves the equation. you will then have a formula for the mass, so you can find the half-life.)

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Mathematics, 06.07.2019 12:10, mlittleduck6947

Majo plutonium-210 has a half-life of 140 days. use the formula , where , is the remaining mass, is the original mass, and is the half-life, to determine how long it takes to reduce 300 milligrams of plutonium-210 to 200 milligrams. arrange the steps in the right order to solve the problem.

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Mathematics, 16.07.2019 11:30, jeffljr2718

Instructions: select the correct answer. the half-life of helium-5 is 7.6 × 10-22 seconds, and the half-life of helium-9 is 7 × 10-21 seconds. approximately how many times greater is the half-life of helium-9 than that of helium-5? 2 times 7 times 9 times 11 times

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Computers and Technology, 10.09.2019 21:30, rosepabon

In an attempt to compare the half-livesof two radioactive elements, x and y, ascientist set aside 400g of each. after 6months, the scientist found that 25g of xand 200g of y remained. which of thefollowing statements is true? a. the half-life of y is twice the half-lifeof x.b. the half-life of y is four times thehalf-life of x.c. the half-life of y is eight times thehalf-life of xd. unless the exact time interval isestablished, a comparison cannot bemade.

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