RissNRojas RissNRojas

07-12-2020
Chemistry

contestada

DESPERATE WILL GIVE BRAINLIST AND THANKS
The half-life of an element is 150 years. If a 40-gram sample was originally deposited, how much is left
after 300 years?

Question 4 options:

30 grams

20 grams

10 grams

5 grams

Respuesta :

JemimaRaji JemimaRaji

07-12-2020

Answer:

20 grams

Explanation:

40g= 300

x = 150

cross multiply, 40*150/300

6000/300= 20g

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