Question

How many moles of H2 gas evolved when 13 gm of Zinc granules dipped into HCl ? calculate the amount of Zn and H2 in moles?​

Answer 1

Answer:

Explanation: Zn+ 2HCl======>ZnCl2+H2. Atomic Weight of Zinc= 65.38. 13 g of Zinc will produce=1x 13/65.38 =0.1988 mole.

Answer 2

Answer:

13 grams of zinc = (?) x miles of H2

Explanation:

x= 13×1/65 = 0.1988 moles so the answer is 0.1988 moles H2 will be evolved when zn is dipped into Hcl