Answer:
1)50.007 grams of an isotope will left after 10 years.
1)25.007 grams of an isotope will left after 20 years.
3) 23 half-lives will occur in 40 years.
Explanation:
Formula used :
where,
= initial mass of isotope
N = mass of the parent isotope left after the time, (t)
= half life of the isotope
= rate constant
We have:
1) mass of isotope left after 10 years:
t = 10 years
2) mass of isotope left after 20 years:
t = 20 years
3) Half-lives will occur in 40 years
Mass of isotope left after 40 years:
t = 40 years
number of half lives = n
n = 23
23 half-lives will occur in 40 years.
Moving the electron away from the nucleus requires energy, so the electrons in the outer shell will have more energy than ones in the inner shell. Electrons always have a charge of -1, so the charge in the inner and outer shell will be the same. Therefore the answer is 3
It is 0 degrees. I am 100% right.
Incomplete combustion occurs when the supply of air or oxygen is poor. Water is still produced, but carbon monoxide and carbon are produced instead of carbon dioxide. ... Carbon monoxide is a poisonous gas, which is one reason why complete combustion is preferred to incomplete combustion.
Answer:
amoeba is the unicellular organism which can be seen by only microscope but not with our nacked eyes