Answer
90.6g
Explanation
Molarity = number of moles of solute per liter of solution
number of moles of Ca(NO3)2 present in the solution = (2.40mol/1000ml) × 230ml = 0.552mol
mass = number of moles × molar mass
mass of Ca(NO3)2 = 0.552mol × 164.1g/mol = 90.6g
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