A substance that
can donate a pair of electrons to form a covalent bond is known as a Lewis
base. It is any substance that can donate a pair of nonbonding electrons. The Lewis
theory suggests that acids react with bases to share a pair of electrons with
no change of oxidation numbers of any atoms.
The main difference between concentration and density is that concentration refers to how much of a substance is present in a mixture, whereas density refers to the mass of a substance per unit volume.
CaBr conducts electricity in the molten state but does not conduct as a solid. ionic dissolution equation.
4) would be your correct answer
<span>2Fe2O3(s) + 3C(s) →4 Fe(s) + 3CO2(g)
3 mol 3mol
4 mol x mol
x=4*3/3= 4.0 mol
</span>2Fe2O3(s) + 3C(s) →4 Fe(s) + 3CO2(g)<span>
2 mol 3 mol
14 mol x mol
x=14*3/2= 21.0 mol</span>
