Final answer:
To find the number of moles of H2O2, you need to use the formula: moles = volume (in liters) x molarity. Given that you have 7.50 ml of H2O2 and assuming it is 100% pure, you have 0.0075 moles of H2O2.
Step-by-step explanation:
To find the number of moles of H2O2, we can use the formula:
moles = volume (in liters) × molarity
Given that we have 7.50 ml of H2O2, we need to convert this to liters:
volume (in liters) = 7.50 ml ÷ 1000
Assuming that H2O2 is 100% pure, the molarity is 1 mole/L:
molarity = 1 mole/L
Substituting the values into the formula:
moles = (7.50 ml ÷ 1000) × 1 mole/L
moles = 0.0075 moles
Therefore, you have 0.0075 moles of H2O2.