How many grams of sodium sulfate must be added to make 500. mL of a 0 .25 M sodium sulfate solution? a 35.5g b 26.6g c 17.8g d 44.4g e 8.88 g

## Step1: Calculate moles of sodium sulfate needed### Use the formula: moles = molarity × volume (in liters). Here, .## Step2: Determine the molar mass of sodium sulfate### The molar mass of sodium sulfate ( ) is determined by adding the atomic masses of 2 sodium atoms, 1 sulfur atom, and 4 oxygen atoms. This is .## Step3: Calculate the grams of sodium sulfate required### Multiply the moles needed by the molar mass: , rounding to significant figures gives .