How many molecules are in 0.25 moles of oxygen gas (O2)? (2022)

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Question: How many molecules are in 0.25 moles of oxygen gas (O2)? (2022)

Options:

Correct Answer: 6.022 x 10^22

Solution:

Number of molecules = moles x Avogadro\'s number = 0.25 moles x 6.022 x 10^23 molecules/mole = 1.5055 x 10^23 molecules.

How many molecules are in 0.25 moles of oxygen gas (O2)? (2022)

How many molecules are in 0.25 moles of oxygen gas (O2)? (2022)

Step 1: Understand that 1 mole of any substance contains Avogadro's number of molecules, which is approximately 6.022 x 10^23.
Step 2: Identify how many moles of oxygen gas (O2) you have, which is 0.25 moles in this case.
Step 3: Use the formula to find the number of molecules: Number of molecules = moles x Avogadro's number.
Step 4: Plug in the values: Number of molecules = 0.25 moles x 6.022 x 10^23 molecules/mole.
Step 5: Calculate the result: 0.25 x 6.022 = 1.5055, and keep the exponent the same, so you get 1.5055 x 10^23 molecules.

Moles and Molecules – Understanding the relationship between moles and the number of molecules using Avogadro's number.