How many moles are in 32 grams of O2? (2021)

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Question: How many moles are in 32 grams of O2? (2021)

Options:

Correct Answer: 1

Solution:

Molar mass of O2 = 16*2 = 32 g/mol. Number of moles = mass/molar mass = 32g/32g/mol = 1 mole.

How many moles are in 32 grams of O2? (2021)

How many moles are in 32 grams of O2? (2021)

Step 1: Identify the chemical formula for oxygen gas, which is O2.
Step 2: Calculate the molar mass of O2. Since each oxygen atom has a mass of 16 grams per mole, and there are 2 oxygen atoms in O2, multiply 16 grams/mol by 2. This gives you 32 grams/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. You have a mass of 32 grams and a molar mass of 32 grams/mol. So, Number of moles = 32g / 32g/mol.
Step 5: Perform the division. 32 grams divided by 32 grams/mol equals 1 mole.

Molar Mass Calculation – Understanding how to calculate the molar mass of a compound by summing the atomic masses of its constituent elements.
Mole Concept – Applying the definition of a mole as a unit of measurement for amount of substance, specifically using the formula: moles = mass (g) / molar mass (g/mol).