Respuesta :
Answer:
1.635 L
Explanation:
Molarity of a substance , is the number of moles present in a liter of solution .
M = n / V
M = molarity
V = volume of solution in liter ,
n = moles of solute ,
Moles is denoted by given mass divided by the molecular mass ,
Hence ,
n = w / m
n = moles ,
w = given mass ,
m = molecular mass .
From the question ,
Molarity of K₂SO₄ = 0.20 M
given mass of K₂SO₄ = 57 g
Since , the molecular mass of K₂SO₄ = 174 g /mol
Using the above formula , moles can be calculated as -
n = w / m = 57 g / 174 g /mol = 0.327 mol
The volume is calculated by using the above formula ,
M = n / V
V = n / M
V = 0.327 mol / 0.20 M = 1.635 L
