Answer:

Explanation:
Hello!
In this case, when we want to balance chemical reactions such as in this case, the idea is to equal to number of atoms of each element at each side of the equation according to the lay of conservation of mass, just as shown below:

Because we have four phosphorous and ten oxygen atoms at each side.
Best regards!
Answer:
24 a 2.85
Explanation:
HCl is a powerful acid so it completely ioniz in water
From a Chemistry perspective it is the electron at 1/1800th the mass of a proton or neutron.
Silver is Ag from the latin Argentum
Lead is Pb from the latin Plumbum