That would be cause part of the sodium is pure and that means it still kind of has it properties when it was an element and that its i think.
Answer:
C
Explanation:
A physical change is when the form of the matter is just altered. While a chemical change results from a chemical reaction. No reaction is happening during the mixing of the two colors [nothing is boiling, freezing, evaporating, melting ext.] , but after you mix them the end result does look different. That only because we changed the physical properties of it.
(B is not a physical change because the baking powder inside of the cake must under go a reaction that causes the cake to rise. )
Answer: 8.25 moles of oxygen are produced.
Explanation: The reaction follows:
By Stoichiometry,
As, 4 moles of Aluminium is produced by 2 moles of aluminium oxide
11 moles of aluminium will be produced by = 
Now, 2 moles of aluminium oxide produces 3 moles of oxygen, so
5.5 moles of Aluminium oxide will produce = 
Hence, 8.25 moles of oxygen will be produced.
Cause its not all about science
