3emmanelson 3emmanelson

03-05-2018
Chemistry

contestada

An 80.0 g sample of iodine-131 was placed in a sealed vessel forty days ago. Only 2.5 g of this isotope is now left. What is its half-life?

Respuesta :

diazpat004 diazpat004

03-05-2018

1.25, you divide 2.5 by 80, then times by 40

Answer Link

Emilani730 Emilani730

17-12-2018

the answer on edg is 8 days

Answer Link

Otras preguntas

What year was the first frisbee invented?

What does a classical japanese village look like?

A state offers two lottery games, WinOne and PlayBall. Both games cost $2 per ticket. In WinOne, the player picks a single letter from A to J and a single digit

Find the common difference of the arithmetic sequence. 2,1 8/9,1 7/9,1 2/3,...A.) 9B.) -1/9C.) 1/9D.) -9

PLEASE HELP ME!!!!!!!!

When did liberalism and conservatism began?

2/3 (greater than less than or equal) 8/12

A regular hexagon has a raduis of 20 inches. what is the approximate area of the hexagon?

What is the largest county in new york state?

The height of a ball thrown directly up with a velocity of 10 feet per second from a initial height of of 100 feet is given by the equation h(t)=-16t^2+10t+100