A 5 gram sample of zinc is added to hydrochloric acid. The amount of hydrochloric acid is sufficient to allow the zinc to react cmpletely. what mass of hydrogen gas does this reaction produce?

0.154g of H2

Explanation:

First, we'll begin by writing a balanced equation for the reaction between zinc (Zn) and hydrochloric acid (HCl). This is illustrated below:

Zn +2HCl —> ZnCl2 + H2

Next, let us determine the mass of Zn that reacted and the mass of H2 formed from the balanced equation.

This is illustrated below:

Molar Mass of Zn = 65g/mol

Molar Mass of H2 = 2x1 =2g/mol

From the balanced equation above,

65g of Zn produced 2g and H2.

Therefore, 5g of Zn will produce = (5 x 2) /65 = 0.154g of H2

From the calculations made above, 5g of Zn produced 0.154g of H2