Question: How many moles are in 88 grams of oxygen (O2)?
Options:
2
1
4
0.5
Correct Answer: 2
Solution:
Molar mass of O2 = 32 g/mol. Number of moles = mass / molar mass = 88 g / 32 g/mol = 2.75 moles.
How many moles are in 88 grams of oxygen (O2)?
Practice Questions
Q1
How many moles are in 88 grams of oxygen (O2)?
2
1
4
0.5
Questions & Step-by-Step Solutions
How many moles are in 88 grams of oxygen (O2)?
Step 1: Identify the chemical formula of oxygen, which is O2.
Step 2: Find the molar mass of O2. Each oxygen atom has a mass of about 16 grams, so O2 (which has 2 oxygen atoms) has a molar mass of 16 g + 16 g = 32 g/mol.
Step 3: Use the formula to find the number of moles. The formula is: Number of moles = mass / molar mass.
Step 4: Plug in the values: Number of moles = 88 grams / 32 g/mol.
Step 5: Calculate the result: 88 g / 32 g/mol = 2.75 moles.
Molar Mass Calculation – Understanding how to calculate the molar mass of a compound and use it to find the number of moles from a given mass.
Mole Concept – Applying the mole concept to convert between grams and moles using the formula: moles = mass / molar mass.
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