Question

using the chemical stoichiometry, determine the number of moles of carbonic acid that can be produced from 4 mol of NaHCO3 and 8 mol HCI

Answer 1

Reaction is NaHCO3 + HCL = H2CO3 + NaCl
the ratios are 1:1 

the 8 moles of HCl are in excess

so if you use 4 moles of NaHCO3 then you will obtain 4 moles of carbonic acid

hope that helps

Answer 2

The number of moles of carbonic acid that can be produced from 4 mol of NaHCO3 and 8 mol of HCl is 4 moles. I am hoping that this answer has satisfied your query and it will be able to help you, and if you would like, feel free to ask another question.