Answer:
Explanation:
The proper reaction equation is expressed below:
   Zn + HCl → ZnCl₂ + H₂
Given parameters:
Number of moles of Zn = 5mol
Unknown:
Theoretical yield of Hâ‚‚
Solution:
The theoretical yield determines the amount of a product produced in a reaction. In a reaction, some reactants in short supply gives a general view to the amount of products that will be formed and are called limiting reagents.
We know that the limiting reagent here is Zn. From here we can estimate the amount of Hâ‚‚ produced.
To find the amount of hydrogen gas,
we know that from the balanced reaction equation:
   1 mole of Zn produced 1 mole of  H₂;
Now, 5 mole of Zn will produce 5 mole of  H₂
To find the mass of Hâ‚‚ produced, we use the expression below:
     mass of  H₂ = number of moles of  H₂ x molar mass of  H₂
Molar mass of  H₂ = 2g/mol
    mass of  H₂ = 5 x 2 = 10g
Theoretical yield of Hâ‚‚ is 10g
