How many oxygen atoms are present in 2.00 millimoles of H2SO4?

There are 6.02E23 atoms in a mol so in 0.002 mols there are 6.02E23*0.002 = ?

Since there are 4 atoms/H2SO4 molecule, multiply the previous number by 4.

To determine the number of oxygen atoms present in 2.00 millimoles of H2SO4, we need to consider the chemical formula of sulfuric acid (H2SO4) and use Avogadro's number.

Step 1: Determine the molar mass of H2SO4
- The molar mass of hydrogen (H) is approximately 1.01 g/mol.
- The molar mass of sulfur (S) is approximately 32.07 g/mol.
- The molar mass of oxygen (O) is approximately 16.00 g/mol.

So, the molar mass of H2SO4 is:
(2 * molar mass of hydrogen) + molar mass of sulfur + (4 * molar mass of oxygen)
= (2 * 1.01 g/mol) + 32.07 g/mol + (4 * 16.00 g/mol)
= 2.02 g/mol + 32.07 g/mol + 64.00 g/mol
= 98.09 g/mol

Step 2: Use Avogadro's number to convert millimoles to moles
- Avogadro's number, denoted as NA, is approximately 6.022 x 10^23 atoms/mol.
- The prefix "milli-" means 1/1000, so 1 millimole (mmol) is equal to 1/1000 mole (mol).
- Therefore, 2.00 millimoles of H2SO4 is equal to 2.00/1000 = 0.002 moles.

Step 3: Calculate the number of oxygen atoms
- In one molecule of H2SO4, there are 4 oxygen atoms.
- In 1 mole of H2SO4, there are 6.022 x 10^23 molecules (by Avogadro's number).
- So, in 0.002 moles of H2SO4, there are (0.002 moles) x (6.022 x 10^23 molecules/mole) = 1.2044 x 10^21 molecules.

Since there are 4 oxygen atoms in each molecule of H2SO4, we can multiply the number of molecules by 4 to find the total number of oxygen atoms:
(1.2044 x 10^21 molecules) x (4 oxygen atoms/molecule) = 4.8176 x 10^21 oxygen atoms

Therefore, there are approximately 4.82 x 10^21 oxygen atoms in 2.00 millimoles of H2SO4.