Answer:
43%
Explanation:
As the problem says that the antimony has only two isotopes, lets call each isotope the following:
x=abundance of isotope 121Sb
1-x=abundance of isotope 123Sb
And
Atomic weight of antimony = (isotopic mass of 121Sb*x)+(isotopic mass of 123Sb*(1-x))
Replacing values we have:
Solving for x:
it means that the abundance of the isotope 121Sb is 57% and the abundance of isotope 123Sb is 43%
C. Life comes from non-living things like the air. Also known as anomalous generation, this idea is based on pre-Aristotelian philosophers that believed that organisms such as mites could be formed from non-living things such as dust. Some of these ideas were adopted into Christianity and the most famous modern tests to test this theory were performed by Pasteur.
Answer:
When making ice cream, you're using physical changes. When you shake your bag, you're freezing the milk, which means the water in it is turning from a liquid (water) into a solid (ice).