Which gas sample has the smallest number of molecules?
- A$1.00\,\text{dm}^3$ of carbon dioxide at $27\,^{\circ}\text{C}$ and $2.0\,\text{kPa}$
- B$1.00\,\text{dm}^3$ of hydrogen at $100\,^{\circ}\text{C}$ and $2.0\,\text{kPa}$
- C$1.00\,\text{dm}^3$ of nitrogen at $300\,^{\circ}\text{C}$ and $4.0\,\text{kPa}$
- D$1.00\,\text{dm}^3$ of oxygen at $250\,^{\circ}\text{C}$ and $3.0\,\text{kPa}$