Question #b28f3

1 Answer
Apr 26, 2017

Answer:

#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#