Chemistry Forum

Ok, it's a different question. Phosphorouspentoxide is existing bimolecular what means the real formula is P4O10.

The reaction is P4 + 5 O2 => P4O10 = 2 P2O5

But 4 mol is wrong, make no sense.

It's a given number. It can also 10, 0,5 98,67 mol or others

What is the problem to solve.

The first part maybe may work. PET breaks in terepthalic acid and ethylenglycol. It is not Di-Benzoylterephthalate it is Di- benzylterephthalate what is used as additive https://pubs.acs.org/doi/10.1021/ed080p79 The second one works different, you have to convert terepthalic acid with methanole to d...

Can you calculate 1/2 + 1/3? In the same way you get the coefficients of the equation.

It will, but the equation is not balanced.
Magnesiumphosphate will precipitate.

Why do you copy, the same I wrote above.

Did you missed it as well????

two equations

m(NaOH) + m(KOH) = 1.15 g

n(NaOH) +n(KOH) = 48.4 ml * 0.5 mmol/ml

use n =m/M

Again this can not be answered with this Information. Tell the educts and the products.
C22H18O4 =?
C2H6O2 = ethylenglycole ?
CH3OH= methanole
C7H8O = ?
(C10H8O4)n =?

To add protons in chemistry means to acidify the solution, to add acid.

Dichromate and chromate are in Equilibrium

Cr2O7 2- + H2O <=> 2 H+ + 2 CrO4 2-

So it make no sense, write structure formula or names of compounds. Conditions, etc.

I answered already in my first post. Why do you copy this again.

Number 1 is correct
Number 2 is like in math 1/2 + 1/3
Number 3 is similar Number 2
Number 4 HSO4 as neutral not existing. Otherwise H2SO4 has to be used.

You will get coppersulfide CuS
The formula of coppernitrate is wrong.

You bake lead oxide not lead metal, fumes are less, but a good hood with ventilation would be solve that Problem.