Answer:
n=14
Explanation:
These ratios can also be written this way:
cross multiply and you get:
7x18=9n
126=9n
n=14
Answer:
Water is a compound because it is made up of water molecules. There is no such thing as water atoms. Water molecules are made of hydrogen and oxygen atoms, in the definite proportion of two hydrogens for one oxygen. ... Aggregates of single atoms make elements.
I believe it is the outer crust but i will do more reaserch for you :)