Question

After the 4th half life how much of the sample is left if the mass is 100g.

Answer 1

`\huge\boxed{\sf 6.25 \ g}`

Explanation:

After every Half life , Half of the mass is left.

After 1st Half life = 100 g / 2 = 50 g

After 2nd Half life = 50 / 2 = 25 g

After 3rd Half life = 25 / 2 = 12.5 g

After 4th Half life = 12.5 / 2 = 6.25 g

`\rule[225]{225}{2}`

Hope this helped!

~AH1807