Balance the following chemical equation by the half-reaction method in acidic conditions. Show your work. P4 + NO3–→ H2PO4– + NO(A) What is the oxidized element? What is the reduced element?
(B) Write balanced half reactions for the oxidation reaction:
(C) Write balanced half reactions for the reduction reaction:

A. Nitrate is the reduced element.

B. Phosphorus is the oxidized element.

C. oxidation half reaction:   P4 + 4H2O ⇒ H2PO4- + 6H+ + 5e

D. Reduction half reaction: NO3- +4H+ 3e- ⇒ NO + 2H2O

Explanation:

P4 + NO3–→ H2PO4– + NO(A)

nitrate is the reduced element as it has lower its oxidation state.

phosphorus is the oxidised element as it has increase in oxidation number.

B) OXIDATION REACTION:

Phosphorus has undergone oxidation from P0 to P5

P4 + 4H2O ⇒ H2PO4- + 6H+ + 5e-

C) REDUCTION REACTION:

Nitrate ion had undergone reduction from nitrate anion to nitrous oxide.

N+5 to N+2

NO3- +4H+ 3e- ⇒ NO + 2H2O

REDOX REACTION:

now multiplying oxidation reaction with 3 and the reduction reaction with 5

P4 + 5NO3- +2H+ + 2H2O⇒ 5NO+3H3PO4-

58750.08068 is the answer i think

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.