isabelgarciapg isabelgarciapg
  • 13-06-2017
  • Chemistry
contestada

The original amount of radioactive substance is 10 grams. After several years, 2.5 gtams of the substance is remaining. How many half-lives havr passed since the mass of the subtance was 10 grams?

Respuesta :

mergl
mergl mergl
  • 14-06-2017
10/2=5 (one half life)
5/2=2.5(two half lives)
Answer Link

Otras preguntas

At what rate does gravity cause objects to accelerate at sea level on earth
If a robin builds a nest in a big tree, the robin benefits and the tree is not helped or harmed. This type of symbiotic relationship is called commensalism, and
what characteristics do tragric heroes share?
Element used to make first atomic bomb
What number is 31 less than fifty two million and four
one book costs £2.99 how much do six books cost
how do landforms affect human life
Show how to solve the problem 378x6 using place value with regrouping. Explain how you knew when to regroup.
A __ map shows the land forms,water and features of a place {fill in the blank}
what characteristics do tragric heroes share?