Final answer:
To determine the number of moles of H2O2 in 2.126 mg, we need to convert the mass to moles using the molar mass of H2O2. The molar mass of H2O2 is 34.0147 g/mol with number of moles as 0.0626 mol.
Step-by-step explanation:
To determine the number of moles of H2O2 in 2.126 mg, we need to convert the mass to moles using the molar mass of H2O2.
The molar mass of H2O2 is 34.0147 g/mol.
Using the formula: number of moles = mass / molar mass, we can calculate the number of moles as follows:
Number of moles = 2.126 mg / (34.0147 g/mol)
= 0.0626 mol (rounded to four decimal places).