if antiseptic hydrogen peroxide is 3% H2O2 by mass, approximately how many moles of H2O2 are present in each gram of antiseptic solution? you can assume the solution has the same density as water. show your calculations.

I suppose that is 3%w/w but with the density of 1.00 g/mL, then it is the same as 3% w/v which means 3g H2O2/100 mL and we want to know moles H2O2 in 1 mL.

moles = grams/molar mass. Convert 3g H2O2 to moles and divide by 100 to find the amount in 1 mL.

To calculate the number of moles of H2O2 in each gram of the antiseptic solution, we first need to convert the mass percentage of H2O2 to grams.

Given:
Mass percentage of H2O2 = 3%
Density of the solution = Density of water

Since the density of water is assumed to be 1 gram per milliliter, the mass of H2O2 in each milliliter of the solution would be:
Mass of H2O2 = (3/100) grams

Now, we can calculate the number of moles of H2O2 in each gram of the antiseptic solution.

1. Calculate the volume of 1 gram of the solution:
Volume of 1 gram of solution = Mass / Density of water
Since the density of water is 1 g/mL, the volume of 1 gram of solution is 1 mL.

2. Convert the volume to milliliters:
1 mL = 1/1000 L

3. Calculate the number of moles of H2O2 in 1 mL of the solution:
Number of moles of H2O2 = (Mass of H2O2 / Molar mass of H2O2) = (3/100) grams / 34.02 g/mol

4. Convert the number of moles to moles per gram:
Since the calculation was done for 1 mL of solution, we need to convert it to grams:
Number of moles of H2O2 per gram = (Number of moles of H2O2 / 1 mL) * (1 g/1 mL)

Now, substituting the values into the equation above:

Number of moles of H2O2 per gram = [(3/100) grams / 34.02 g/mol] * (1 g/1 mL)

Calculating this expression will provide the approximate number of moles of H2O2 present in each gram of the antiseptic solution.