Answer: 6.75 moles of 
can be produced from 13.5 moles Na
Explanation:
The balanced chemical equation for formation of from Na is:
According to stoichiometry :
4 moles of Na give = 2 moles of
Thus 13.5 moles of 
give =
of
Thus 6.75 moles of can be produced from 13.5 moles Na
it doesn't repopulate as fast because ecosystem 2 could have more trouble reproducing then ecosystem 1.
3Mg + N₂ = Mg₃N₂
Mg₃N₂
______________________
The law of cross-cutting relationships states that an igneous intrusion or any other geologic feature of a rock must be younger than any rock it cuts.
Explanation:
Igneous intrusion is formed when the magma intrudes into the cracks of an existing rock.When the melted rocks solidifies and cool down the resulting feature is the Igneous intrusion
The law of cross cutting is basically a principle of geology that states that the geological feature of a rock that cuts the other is always younger.
Metamorphic rock in death valley,California in an example of the law of cross-cutting relationship
Answer:
When Potassium react with fluorine <u>potassium fluoride</u> is formed.
Explanation:
The elements of group 17 are called halogens. These are six elements Fluorine, Chlorine, Bromine, Iodine, Astatine. Halogens are very reactive these elements can not be found free in nature.
When halogen elements react with group one metals they form halide salts.
Alkali metals have one valance electron and halogens needed one electron to complete the octet thus alkali metals loses one electron which is accepted by halogens atom and form ionic compound called halide salts.
When Potassium react with fluorine potassium fluoride is formed.
Chemical equation:
2K + F₂ → 2KF
