Question

Balance the following equations:
(1) P + O2 → P2O5
(ii) C2H4 + O2 + CO2 + H2O
(iii) P2O5 + H2O → H3PO4​

Answer 1

1. 2P + 5O2 = 2P2O5

2. Please check this equation . The products and reactants are not clear.

3. P2O5 + 3H20 = 2H3PO4

Answer 2

1 .P + O2 = P2O5

ANSWER:

4P + 5O2 = 2P2O5

 

Reaction Information

Phosphorus + Dioxygen = Phosphorus Pentoxide

Reaction Type

Synthesis

Reactants

Phosphorus (P)Molar Mass Oxidation Number

Element 15 P 磷 Phosphorus P-33 P-33 33P Phosphorus-33 Atom (33)P

Dioxygen (O2)Molar Mass Bond Polarity Oxidation Number

O2 O₂ Oxygen Gas Oxygen Molecular Oxygen Oxygen O-17

Products

Phosphorus Pentoxide (P2O5)

2. C2H4 + O2 → CO2 + H2O

ANSWER

We are asked to balance the following chemical reaction.

Unbalanced Chemical Reaction: C2H4  + O2→ CO2+ H2O

Balancing the chemical reaction:

1. Balance the non-oxygen and non-hydrogen elements first:C

Give CO2 a coefficient of 2 to balance C.

C2H4 + O2 →2 CO2 + H2O

3 . P2O5 + H2O = H3PO4

Answer:

P2O5 + 3H2O = 2H3PO4

Explanation:

Phosphorus Pentoxide + Water = Phosphoric Acid

Reaction Type

Synthesis

Reactants

Phosphorus Pentoxide (P2O5)Molar Mass Oxidation Number

Phosphoric Anhydride

Water (H2O)Molar Mass Oxidation Number

H2O Dihydrogen Monoxide Dihydridooxygen [OH2] HOH Hydrogen Hydroxide Dihydrogen Oxide Oxidane

Products

Phosphoric Acid (H3PO4)Molar Mass Oxidation Number

Orthophosphoric Acid Phosphoric(V) Acid White Phosphoric Acid [PO(OH)3] H3PO4 E338 Potassium Phosphate