Answer: 100 grams of the parent isotope will remain after one half life.
Explanation:
Mass of the isotope present at initial stage = 
The mass of the parent isotope left after the time ,t=N
Time taken by the samle ,t = 
The half life of the sample :
![\ln[N]=ln[N^o]-\frac{0.693}{t_{\frac{1}{2}}}\times t_{\frac{1}{2}}](https://tex.z-dn.net/?f=%5Cln%5BN%5D%3Dln%5BN%5Eo%5D-%5Cfrac%7B0.693%7D%7Bt_%7B%5Cfrac%7B1%7D%7B2%7D%7D%7D%5Ctimes%20t_%7B%5Cfrac%7B1%7D%7B2%7D%7D)
![2=\frac{[N_o]}{[N]}](https://tex.z-dn.net/?f=2%3D%5Cfrac%7B%5BN_o%5D%7D%7B%5BN%5D%7D)
![[N]=\frac{N_o}{2}=\frac{200 g}{2}=100 g](https://tex.z-dn.net/?f=%5BN%5D%3D%5Cfrac%7BN_o%7D%7B2%7D%3D%5Cfrac%7B200%20g%7D%7B2%7D%3D100%20g)
100 grams of the parent isotope will remain after one half life.
Answer:
The five true statements are numbers: 1, 2, 5, 6 and 7
Explanation:
1. Temperature drives water movement in some lakes.
2. Tropical coral reefs generally exist in relatively shallow areas of the ocean.
5. Wetlands have slow water movement or no water movement and no turnover.
6. Estuaries are very productive and are used as breeding grounds by many species of fish.
7. A freshwater organism permanently attached to the substrate would be unlikely to survive and reproduce in an estuary.
Answer:
A
Explanation:
Fertilizations occurs in the fallopian tube.
Point "a" is located where the fallopian tube is at
Hence, fertilization is most likely to occur at point A
Answer:
That's correct most birds have diffrent shaped beaks for diffrent reasons for example some birds can tweezer beaks which helps to dig into the worm holes to get worms or help to drill into trees
Explanation:
I had to put the answer in the image sorry
