506g of hi produce how many grams of i2?

502 g

Step-by-step explanation:

We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.  

M_r: 127.91       253.81

         2HI ⟶ H₂ + I₂

m/g:  506

(a) Calculate the moles of HI

n = 506 g HI  × (1 mol HI/127.91 g HI)

n = 3.955 mol HI

(b) Calculate the moles of I₂

The molar ratio is (1 mol I₂/2 mol HI)

n = 3.955 mol HI × (1 mol I₂/2 mol HI)

n = 1.978 mol HI

(c) Calculate the mass of I₂

m = 1.978 mol I₂ × (253.81 g I₂/1 mol I₂)

m = 502 g I₂