1 gram of sodium hydroxide was reacted with 25mL25 \mathrm{mL}25mL of 0.75M0.75 \mathrm{M}0.75M sulfuric acid (H2SO4\mathrm{H_2SO_4}H2βSO4β). What mass of sodium hydroxide remains unreacted?
0 g
0.2 g
0.4 g
0.6 g
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