The number of carbon atoms in 975 milligrams of Tabun is approximately 4.89 × 10^22.
The average molar mass of carbon is 12.011 g/mol. To determine the number of carbon atoms in 975 milligrams of Tabun, we need to convert the mass to moles. 975 milligrams is equal to 0.975 grams. Using the molar mass of carbon, we can calculate the number of moles of carbon atoms:
0.975 g C * (1 mol C / 12.011 g C) = 0.081 mol C
Since there is 1 mole of carbon atoms in 6.022 × 10^23 carbon atoms, we can convert the moles of carbon to the number of carbon atoms:
0.081 mol C * (6.022 × 10^23 atoms C / 1 mol C) = 4.89 × 10^22 atoms C
Therefore, there are approximately 4.89 × 10^22 carbon atoms in 975 milligrams of Tabun.