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

check your answer for x= -2/3 5(3x+4)-8(6x+7)=9x-8

Ashton, Bryan and Charles were given the same number of funfair tickets to sell. Charles sold 92 tickets. Bryan had twice as many tickets left unsold as Ashton'

What sign that an infant is beginning to understand that actions have a reactions

What percentage of the circle is shaded? * Between 0 and 25% Between 25% and 50% Between 50% and 75% Between 75% and 100% 1 point

(true or false) the mass needed to sustain a nuclear chain reaction is known as the critical mass.

Which organism has the most available energy? sea urchin sea otter kelp elephant seal

how do I do this correctly?

Work out the value of 1 squared 2 cubed 3 to the power of 4

In a race the second place finisher crossed the finish line 1 1/3 minutes after the winner. The third place finisher was one and one 1 3/4 minutes behind the se

is a personal residence a capital asset