Answer:
25 possibly
Explanation:
I'm not too sure about this, but sodium oxide is Na2O, 2 sodium and 1 oxygen, so 12.5g * 2 is 25
If someone else comes up with a more convincing argument listen to them
Answer:
Some animals hunt by <em>Camouflage</em> or sneaking up on their prey.
Given :
A certain compound contains 4.0 g of calcium and 7.1 g of chlorine.
Its relative molecular mass is 111.
To Find :
Its empirical and molecular formulas.
Solution :
Moles of calcium ,
.
Moles of chlorine ,
.
The ratio calcium and chlorine is 1 : 2 .
So , the empirical formula is
.
Now , molecular mass of
is :

So , 
Therefore , the molecular formula is also
.
Hence , this is the required solution .
Al 3+ ions to S 2- ions in a neutral compound is 12 oxygen