how many oxygen atoms are in 0.25 mole of SO3 ?
To determine the number of oxygen atoms in 0.25 moles of SO3 (sulfur trioxide), we need to use the chemical formula of SO3.
The chemical formula of SO3 indicates that there is one sulfur atom (S) and three oxygen atoms (O) in each molecule of SO3.
We can calculate the number of moles of oxygen atoms in 0.25 moles of SO3 by multiplying the number of moles of SO3 by the ratio of oxygen atoms to SO3 molecules.
The ratio of oxygen atoms to SO3 molecules is 3:1, meaning there are three oxygen atoms in each molecule of SO3.
Therefore, the calculation is as follows:
0.25 moles SO3 x (3 moles O / 1 mole SO3) = 0.75 moles O
Since there are approximately 6.022 x 10^23 atoms in one mole (Avogadro's number), we can convert the moles of oxygen atoms to the number of oxygen atoms by multiplying by Avogadro's number.
0.75 moles O x (6.022 x 10^23 atoms / 1 mole) = 4.5165 x 10^23 oxygen atoms
So, there are approximately 4.5165 x 10^23 oxygen atoms in 0.25 moles of SO3.
To find out how many oxygen atoms are in 0.25 moles of SO3, we need to know the number of oxygen atoms in one mole of SO3.
The formula for SO3 is composed of one sulfur (S) atom and three oxygen (O) atoms, so the empirical formula mass of SO3 is:
Sulfur (S) atomic mass: 32.07 g/mol
Oxygen (O) atomic mass: 16.00 g/mol
Empirical formula mass of SO3 = (1 × S atomic mass) + (3 × O atomic mass)
Empirical formula mass of SO3 = (1 × 32.07 g/mol) + (3 × 16.00 g/mol)
Empirical formula mass of SO3 = 80.07 g/mol
Now, we can calculate the number of moles of SO3 in 0.25 moles:
Number of moles of SO3 = 0.25 moles
Next, we'll use Avogadro's number, which tells us the number of particles (such as atoms or molecules) in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.
Number of oxygen atoms in 0.25 moles of SO3 = (number of moles of SO3) × (Avogadro's number) × (number of oxygen atoms in one mole of SO3)
Number of oxygen atoms in 0.25 moles of SO3 = 0.25 moles × (6.022 × 10^23) × (3)
So, plugging in the values:
Number of oxygen atoms in 0.25 moles of SO3 = 0.25 × (6.022 × 10^23) × 3
Number of oxygen atoms in 0.25 moles of SO3 ≈ 4.5165 × 10^23
Therefore, there are approximately 4.5165 × 10^23 oxygen atoms in 0.25 moles of SO3.