Solution.
"H2X + 2NaOH = 2NaX + 2H2O"
"N(NaOH) = \\frac{1}{10} = 0.1 N"
"n(NaOH) = 0.1 \\times 0.1 = 0.01 mol"
"n(H2X) = \\frac{n(NaOH)}{2}"
n(H2X) = 0.005 mol
"M(H2X) = \\frac{m(H2X)}{n(H2X)} = 90 g\/mol"
Answer:
90 g/mol
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