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how many grams of nitrogen -16 will br left from a 16g sample after 21.6 seconds if its half life is 7.2 seconds

Respuesta :

spectrojamz

Answer:

From Radioactivity

N/N° = (1/2)^t/t•

Where

N=Remaining Mass

N°=Initial Mass

t=Time of decay Or Time spent on decayingb

t•=Half life

N=N°(1/2)^t/t•

N=16(1/2)^21.6/7.2

N=16(1/2)³

N=16(1/8)

N=2g.

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