The valence electrons are in the s-orbital.
A molecule consists of two or more atoms united by a bond
Answer:
55 moles FeS2
Explanation:
You can't do this without knowing what the reactants and products are. Even then the reactants and products have to have equal numbers of atoms on each side of the equation. That's called balancing.
The bare equation is
FeS2 + O2 → Fe2O3 + SO2
It is not balanced. Just as an example, the sulfurs have 2 on the left and 1 on the right. The oxygens have 2 of the left and 5 on the right, so you have to get all of that balanced.
Start with the oxygen in Fe2O3. It's an odd number. Put 2 in front of Fe2O3
FeS2 + O2 → 2Fe2O3 + SO2
But now the Fe's don't balance. Put a 4 in in front of the FeS2
4FeS2 + O2 ===> 2Fe2O3 + SO2
The Ss are way out of kilter. Put an 8 in front of SO2
4FeS2 + O2 → 2Fe2O3 + 8SO2
Finally the oxygens There are 2*3 + 8*2 = 22 oxygens on the right
Put an 11 (because it is O2) on the left
4FeS2 + 11O2 → 2Fe2O3 + 8SO2
That's your balanced equation
4 mols of FeS2 produce 2 moles of Fe2O3
x mols of FeS2 produce 27.5 mols of Fe2O3
4/x = 2/27.5 Cross multiply
2x = 4*27.5
2x = 110 Divide by 2
x = 110/2
x = 55
Answer:
Pressure is an important physical quantity—it plays an essential role in topics ranging from thermodynamics to solid and fluid mechanics. As a scalar physical quantity (having magnitude but no direction), pressure is defined as the force per unit area applied perpendicular to the surface to which it is applied. Pressure can be expressed in a number of units depending on the context of use.
Explanation:
Probably not the best answer but hope this helps somewhat. :)