Digital ACT Science Practice Question #1313
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
Read carefully: 'What volume of water must be ADDED?' Always subtract initial volume: $V_2 - V_1 = {v2} - {v1} = {water_needed}$.
Using $M_1 V_1 = M_2 V_2$: $$(3.0\text{ M})(100\text{ mL}) = (0.6\text{ M})(V_2) \implies 300.0 = 0.6 V_2 \implies V_2 = \frac{300.0}{0.6} = 500\text{ mL}.$$ The question asks for the volume of water *added*, which is the final total volume...
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