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What would the molarity of 50 mL of 3% hydrogen peroxide be if it's volume/volume? I know how to do weight/volume but not this, someone help?

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3% v/v means 3mL H2O2/100 mL solution; therefore, 50 mL of the solution will contain 1.5 mL H2O2.
If you know the density of the H2O2, then
mass = volume x density.
moles = mass H2O2/molar mass H2O2.
Then moles/0.050 L = molarity.
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