Ask a New Question

Question

``If 18g of a radioactive substance are present initially and 5 yr later only 9 g remain, how much of the substance will be present after 11yr ?
after 11yr there will be ___g of a radioactive substance.
round the final answer to the nearest thousandth as needed. round all intermediate values to the nearest thousandth as needed.''
10 years ago

Answers

bobpursley
half life is 5 years

amount remaining= 18*e^(-.692*11/5)
Put this in the google search window
18*e^(-.692*11/5)=
10 years ago

Related Questions

2x-y=-6 -4x+2y=-9 use substitution A sample of a radioactive substance decayed to 93.5% of its original amount after a year. a) What... The mass of a radioactive substance follows an exponential decay model, with a decay rate of 5% per... A sample of a radioactive substance decayed to 94.5% of its original amount after a year. (Round you... In which of the following substances does sharing of electrons between two atoms occur? He... the amount of radioactive substance prsent at anytime is given by q(t)=Q0e-0.1 How will it take for... How much of a radioactive substance must be presented to decay to 60 grams in 11 years if the half-l... The mass of a radioactive substance decreases at a rate proportional to the mass at the time. The or... How much of a radioactive substance remains after three half-lives? a) one third b) one half c)... Four grams of radioactive substance are decaying with a half-life of 120 years. How many years will...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use