You have 896 grams of a radioactive

kind of radon. If its half-life is 56

seconds, how much will be left after

224 seconds?

grams

Every 56 seconds, the radioactive substance is divided in half.

224 / 56 = 4

We need to cut the substance in half 4 times.

896 / 2 = 448

448 / 2 = 224

224 / 2 = 112

112 / 2 = 56

After 224 seconds, there will be 56 grams of the radioactive substance left over

56 grams

Step-by-step explanation:

To get how much a HALF-life is, divide the amount by two getting one half of the original amount. That represents on half-life. so 224 = 56 x 4

remember the half-life is fifty-six, so there would be 4 half-lives within 224 seconds. Divide 896 by 2 (448) then again divide by 2 (224) divide by 2 again (112) and again divide by 2 and you would get 56 grams.