Which metal will produce h2 gas when added to a solution containing a strong acid?
a. cu(s)
b. ag(s)
c. au(s)
d. zn(s)

Zn(s) produces H₂ when is added to a strong acid solution

Explanation:

Look at this example:

2Zn (s)  + 2HCl (aq) → 2ZnCl (aq)  + H₂ (g)

It is a redox reaction, where the zinc is oxidized and the H, reducted.

Zn → Zn⁺ + 1e⁻

2H⁺  +  1e⁻ → H₂

that's what i got you can count the number of atoms

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa