Sunnkhueli5ceySz Sunnkhueli5ceySz

03-11-2016
Chemistry

contestada

After three half-lives,what fraction of a radioactive sample remains.

Respuesta :

MartianManiac MartianManiac

14-11-2016

after1 half life 50 percent
after another half life 50 percent of 50 percent which is 25 percent
after 3 half lifes 50 percent of 50 percent of 50 percent which is 50 percent of 25 which is 12.5 percent
12.5 percent is left

Answer Link

Otras preguntas

Consider a food chain with 1,000 joules (an energy unit) available at the producer level. If this food chain is grass -> grasshopper -> lizard -> crow,

calculate the average speed of spacecraft orbiting mars

least to greatest 7/8 0.98 8/9

what is the number 8.293 round on the hundredths

6X8=------ PLEASE HELP

work out the value of 3x + 2y then x = 5 and y = 4

How did the principles of the American Revolution influence the debate over American imperialism in the Philippines

Elevation refers to the ?

Betty gets paid 25 cents per paper to deliver newspapers in her neihborhood. When Betty is sick, she pays her brother Bob 10 cents per paper to deliver for her.

A jeweler is heating a bar if gold. It takes 7 joules of heat to raise temperture if the bar 1degrees celsuisThe initial temperture of the bar is 25degress cels