Step 1: Identify the chemical formula for oxygen gas, which is O2.
Step 2: Calculate the molar mass of O2. Each oxygen atom has a mass of 16 grams. Since there are 2 oxygen atoms in O2, multiply 16 grams by 2 to get 32 grams per mole.
Step 3: Use the formula for calculating the number of moles, which is: Number of moles = mass / molar mass.
Step 4: Plug in the values: mass is 88 grams and molar mass is 32 grams per mole.
Step 5: Perform the calculation: 88 grams divided by 32 grams per mole equals 2.75 moles.
