Answer:
Step-by-step explanation:
The formula for concentration is C = n/V
Where C represents concentration in mol/L.
n represents moles in mol.
V respresents volume in L.
You have 550 mL, let's convert it to L (1000 mL= 1L)
550 mL / 1000 = 0.55 L
We got V and we need n. We can find n by this formula:
n = m/M
m represents mass in g.
M represents molar mass in g/mol.
We are given grams of iron (II) chloride (FeCl2)
Find the molar mass by the periodic table: 55.85 + (2*35.45) = 126.75 g/mol.
n = (350 g) / (126.75 g/mol) = 2.76134 mol
Back to our first formula: C = n / V
C = (2.76134 mol) / (0.55 L) = 5.0206 mol/L.
to 3 significant digits it's 5.02 mol/L, and that is how you find concentration.