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How much water would I add to a 50percent solution of H2O2 to make 500 ml of 3percent H2O2?

To make a 500 ml solution of 3% H2O2 from a 50% solution, you would need to dilute the 50% solution with water. You would add 325 ml of water to 175 ml of the 50% H2O2 solution to achieve a final volume of 500 ml with a concentration of 3% H2O2.


When A dry soil sample has a volume of 500 mL After 400 mL of water are added to the soil the soil becomes saturated with 150 mL of surface water left on top What is the porosity of the soil?

Porosity is calculated by dividing the volume of voids (pores) by the total volume. In this case, the volume of voids is the difference between the volume of water added and the volume left on top of the saturated soil (400 mL - 150 mL = 250 mL). The total volume is the sum of the dry soil volume and the water added (500 mL + 400 mL = 900 mL). Therefore, the porosity of the soil is 250 mL / 900 mL, which is approximately 0.28 or 28%.


A marble displaces 1.72 ml of water the volume of the marbles is what?

1 mL of water equals 1cm^3 of volume, so 1.72 ml= 1.72 cm


How many percent water on earth?

Around 71% of the Earth's surface is covered by water, with the majority of it being saltwater in oceans. Only about 3% of the Earth's water is freshwater, found in rivers, lakes, and ice caps.


How many grams of hydrogen peroxide H2O2 must be added to 1500 ml of water to produce a concentration of 1.33 m molal solution Recall that the density of water is 1.0 gram?

To calculate the amount of hydrogen peroxide (H2O2) needed to make a 1.33 molal solution in 1500 ml of water, you first need to convert the volume of water to grams. Since the density of water is 1.0 g/ml, 1500 ml of water is equal to 1500 grams. Next, calculate the moles of H2O2 needed using the molality formula (molality = moles of solute / mass of solvent in kg). Then convert the moles to grams by multiplying by the molar mass of H2O2 (34.02 g/mol).