Question

Question #b28f3

Answer 1

`grams HCl = 339 grams`

Explanation:

First, find how many moles of `H_2` gas will take up 104 liters.

`(1 mol H_2(g))/(22.4L) = ("x" mol H_2(g))/(104L)`

`x = 4.642857143mols`

Now use the reaction coefficients to find the moles of hydrochloric acid needed to form the above moles of hydrogen gas.

`mols HCl = 4.642857143molsH_2 * (2 mols HCl)/(1 mol H_2)`

`mols HCl = 9.285714286`

To find grams of HCl just multiply the moles of HCl by its molar mass.

`grams HCl = 9.285714286mols HCl * 36.46094 g/(mol)`.

`grams HCl = 338.565871439 grams`

Since you only have 3 sig figs, the answer would be:

`grams HCl = 339 grams`