Final answer:
A D size oxygen cylinder typically holds 340 liters of oxygen, but the volume of O2 at normal body conditions, which are 1 atm and 37 °C, can be found using the combined gas law, given the cylinder's volume, and pressure and temperature of the contained oxygen.
Step-by-step explanation:
A D size cylinder of oxygen typically holds 340 liters of oxygen. This is calculated using the cylinder's internal volume and the pressure of the oxygen inside. When you are asking about medical oxygen cylinders and how much volume of oxygen they can hold under specific conditions like normal body conditions which are 1 atm and 37 °C, you need to apply the combined gas law to find the equivalent volume of oxygen at these conditions from a known state.
In your question, we are using a cylinder with a volume of 35.4 L holding oxygen at 151 atm and 25 °C. Using the combined gas law, which states that the ratio of the product of pressure and volume to temperature is a constant (P1V1/T1 = P2V2/T2), you can find the volume of O2 at normal body conditions.
Remember to convert temperatures to Kelvin in these calculations. After calculating, you would find that the volume of oxygen that the D size cylinder can hold at body conditions is significantly larger than its volume at the higher pressure due to the significant decrease in pressure to 1 atm and slight increase in temperature to 37 °C.