Number of atoms in 2 gram O2.
To find the number of atoms in 2 grams of O2, we need to use the concept of the Avogadro's number.
The molar mass of O2 is 32 g/mol (16 g/mol for each oxygen atom).
We can now calculate the moles of O2 by dividing the given mass (2 g) by the molar mass (32 g/mol):
moles = 2 g / 32 g/mol = 0.0625 mol
Since O2 contains 2 oxygen atoms per molecule, we can multiply the number of moles by the Avogadro's number to find the number of atoms:
number of atoms = moles * Avogadro's number = 0.0625 mol * 6.022 × 10^23 atoms/mol
Using a calculator, we find:
number of atoms ≈ 3.76375 × 10^22 atoms
Therefore, there are approximately 3.76375 × 10^22 atoms in 2 grams of O2.
To find the number of atoms in 2 grams of O2 (oxygen gas), you'll need to follow these steps:
Step 1: Calculate the molar mass of O2.
The molar mass of oxygen (O) is 16.00 g/mol. Since there are two oxygen atoms in O2, the molar mass of O2 is 2 * 16.00 g/mol = 32.00 g/mol.
Step 2: Calculate the number of moles of O2.
To find the number of moles, divide the given mass (2 grams) by the molar mass (32.00 g/mol):
Number of moles = mass / molar mass
Number of moles = 2 g / 32.00 g/mol
Number of moles = 0.0625 mol
Step 3: Convert moles to atoms.
Since 1 mole contains 6.022 x 10^23 atoms (Avogadro's number), we can multiply the number of moles by Avogadro's number to get the number of atoms:
Number of atoms = number of moles * Avogadro's number
Number of atoms = 0.0625 mol * 6.022 x 10^23 atoms/mol
Number of atoms = 3.766 x 10^22 atoms
Therefore, there are approximately 3.766 x 10^22 atoms in 2 grams of O2.