Question

Hydrogen peroxide solution purchased in stores usually has a concentration of 3%. The 3% is measured as a percent mass per volume. Let's determine if the analyzed sample is close to this 3% advertised value. You found there were 0.0003360068 mol H 2 O 2

Answer 1

To determine if the analyzed sample is close to the 3% advertised value, we need to convert the moles of H2O2 to grams, and then compare this to the total mass of the solution.

The molar mass of H2O2 is approximately 34.02 g/mol. So, the mass of H2O2 in the sample is:

0.0003360068 mol x 34.02 g/mol = 0.01143 g

To find the percent mass/volume, we need to know the total volume of the solution. However, this information is not provided in your question. If you have this information, you can calculate the percent mass/volume by dividing the mass of H2O2 by the total volume of the solution (in mL), and then multiplying by 100.

Step-by-step explanation: