please help me with this question!

a 1g sample of naoh contaminated with na2co3 is titrated with 0.500MHCl, and it is found that 46.5mL of HCl are required for neutralization. Find the percentage by mass Na2Co3

2 answers

I responded to another post of this same question. Find that one and see if you can provide the added information.
It is below this one by several posts.