According to the following reaction, how many moles of hydrogen gas will be formed upon the complete reaction of 0.235 moles hydrobromic acid? hydrobromic acid

Question

According to the following reaction, how many moles of hydrogen gas will be formed upon the complete reaction of 0.235 moles hydrobromic acid?

hydrobromic acid (aq) hydrogen (g) + bromine (l)

Answer 1

We set up the balanced chemical equation:

 

2HBr ----->H₂ + 2Br

 

Then set up our conversion

 

.235 moles HBr * 1 mole H₂ / 2 moles 2HBr  = .1175 moles of H₂