chemistry first yera

A 0.4 g sample of monobasic acid requires 16cm3 of 0.1 mol per dm3 of NaOH for complete neutralization . what is the relative mass of the acid?? Plz ans me urgent

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  1. HA + NaOH ==> NaA + H2O
    mols NaOH = M x L = ?
    mols HA = mols NaOH (look at the 1:1 coefficients)
    mols HA = grams/molar mass
    You know mols HA and grams, solve for molar mass.

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