Question

If 3.5 moles of Zn are used, how many moles of HCl are required?

Answer 1

If 3.5 moles of Zn are used, how many moles of HCI are required?
d) 7 mol HCI

Answer 2

The number of mole of HCl used, given that 3.5 moles of Zn are used is 7 moles (option D)

How to calculate the mole of HCl used?

The number of mole of HCl used can be calculated as illustrated below:

• Number of mole of Zn used = 3.5 moles
• Number of mole of HCl used = ?

Balanced equation:

`Zn\ +\ 2HCl\ \rightarrow ZnCl_2\ + H_2`

From the balanced equation above, we can observe that:

1 mole of Zn required 2 moles of HCl

Therefore,

3.5 moles of Zn will require = 3.5 × 2 = 7 moles of HCl

From the above calculation, we can see that 7 moles of HCl are required to react with 3.5 moles of Zn.

Therefore, the answer to the question is option D