Finding concentration of citric acid in lemon juice after titration?

Citric acid, the predominant acid in lemon juice, is a triprotic acid. A student titrated 25.0 mL samples of lemon juice with 0.550 mol/L NaOH. The mean titration volume was 29.50 mL. The molar mass of citric acid is 192.12 g/mol. What was the concentration of citric acid in the lemon juice? The answer was... show more Citric acid, the predominant acid in lemon juice, is a triprotic acid. A student titrated 25.0 mL samples of lemon juice with 0.550 mol/L NaOH. The mean titration volume was 29.50 mL. The molar mass of citric acid is 192.12 g/mol.

What was the concentration of citric acid in the lemon juice?

The answer was 41.5 g/mol but I don't know how to get this. Help please!
Update: Citric acid, the predominant acid in lemon juice, is a triprotic acid. A student titrated 25.0 mL samples of lemon juice with 0.550 mol/L NaOH. The mean titration volume was 29.50 mL. The molar mass of citric acid is 192.12 g/mol. What was the concentration of citric acid in the lemon juice? The answer was... show more Citric acid, the predominant acid in lemon juice, is a triprotic acid. A student titrated 25.0 mL samples of lemon juice with 0.550 mol/L NaOH. The mean titration volume was 29.50 mL. The molar mass of citric acid is 192.12 g/mol.

What was the concentration of citric acid in the lemon juice?

The answer was 41.6 g/mol but I don't know how to get this. Help please!
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