How many mL of 3% aqueous hydrogen peroxide solution can you make out of 100 mL of 35% aqueous hydrogen peroxide?

We can use the formula: {(concentration A) ? (volume A) = (concentration B) ? (volume B)} where A represents the initial solution and B represents the final solution. In this problem, we want to know how much of a {eq}3%{/eq} solution we can make from {eq}100 mL{/eq} of a {eq}35%{/eq} solution. So: (concentration A) = 35% (volume A) = 100 mL (concentration B) = 3% (volume B) = ? Plugging these values into the formula: (35%) ? (100 mL) = (3%) ? (volume B) Solving for {eq}volume B{/eq}: volume B = (35%/3%) ? 100 mL ? 1,167 mL Therefore, we can make about {eq}1,167 mL{/eq} of a {eq}3%{/eq} solution from {eq}100 mL{/eq} of a {eq}35%{/eq} solution.