Answer:
iron oxide. aka. oxygen
Explanation:
Rust is the result of a chemical reaction between iron and oxygen, otherwise known as iron oxide. Since steel wool -- and steel in general -- is largely made of iron, steel wool is prone to rust if it doesn't have a rustproof coating on it. The actual reaction that creates rust happens when two iron atoms mix with three oxygen atoms in water; the oxygen bonds to the metal, and a new compound is formed.
C) moisture, falling air, and a lifting mechanism
First we need to calculate the molar mass of
:
Na: 22.99g * 2 = 45.98g
Cr: 51.996g
O: 15.999g * 4 = 63.996g
Then add all of them together:
Now we know the molar mass of
is 161.97g.
We are given the amount of grams used in the solution. So let's find how many moles that were used:
We are asked to calculate the molarity, and we know the molarity formula is as follows:
We just calculated the number of moles that were used, and we are given the amount of solution (in mL, but we can convert 630 mL to 0.63 L by dividing by 1000 since there are 1000 mL in 1 L). So let's plug in the values to calculate for molarity:
So now we know that
the molarity of the solution is 0.12 M.
Answer:
C). Electrostatic attractions between + and - charged ions.
Explanation:
They're electrostatic attractions because it is electrovalent bonding.