Chemistry: ITUS PIOLO 54. An unknown isotope has a half-life of 20 seconds. How much of your original sample will remain after 1 minute if you started with 1500 grams of the isotope? I Help please

ITUS PIOLO 54. An unknown isotope has a half-life

Ответ:

kelseychristian24

11.04.2021

$\boxed{ \tt{187.5g}}$

Explanation:

$let \: the \: o_m \: be \to \: 1500g\\ let \: the \: h_l: be \to 20s\\ for \: every \: 20s : o_m \: is \: reduced\: by \: \frac{1}{2} \to \\ hence \: after \: 1min \: (60s = three \: 20s) \\ hence \to \\ after \: the \: first \: 20s \: o_m = \frac{1500}{2} = 750g\\ after \: the \: second \: 20s \: o_m = \frac{750}{2} = 375g \\ after \: the \: third \: 20s \: o_m = \frac{375}{2} = 187.5g \\ hence \: after \: a \: minute \: the \: orgial \: sample : \\ \boxed{ \tt{o_m : 1500g \: will \: be \: to \: 187.5g}}$

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Ответ:

andy6128

02.02.2022

Chemistry

the first choice, the second choice, and the last choice

Step-by-step explanation:

5 and 6 because they are alternate angles

2 and 3 because they are corresponding angles

2 and 4 because they are corresponding angles

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ITUS PIOLO 54. An unknown isotope has a half-life of 20 seconds. How much of your original sample will remain after 1 minute if
you started with 1500 grams of the isotope? I
Help please

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