The question is incomplete, the complete question is:
A chemist prepares a solution of calcium sulfate (CaSO_4) by measuring out 0.0101 g of calcium sulfate into a 350. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's calcium sulfate solution. Round your answer to 3 significant digits.
Answer:
2.12×10^-4 MolL-1
Step-by-step explanation:
From m/M= CV
Where
m= mass of substance
M= molar mass of substance
C= concentration of substance
V= volume of solution
Molar mass of CaSO4= 40 + 32 +4 (16)= 136gmol-1
C= m/M ×1/V
C= 0.0101/136 × 1/350/1000
C= 2.12×10^-4 MolL-1