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6.0 g weak acid HA (mol.mass=60 g/mol.) ...

`6.0` g weak acid HA (mol.mass=60 g/mol.) is dissolved in water and formed 10 `m^(3)` solution. If `K_(a)(HA)=10^(-9),` then pOH of solution is : [Given: log 4=0.6]

A

7

B

greater than 6.7 and less than 7.0

C

greater than 7.0 and less than 7.3

D

greater than 7.3

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