The same number of grams of NH 3 and O2 are placed in separate bulbs of equal volume and temperature under conditions when both gases behave ideally. Which statement is true?
1. The pressure in the NH 3 bulb is greater than the pressure in the O 2 bulb.
2. Both bulbs contain the same number of moles of gas.
3. The pressures in the two bulbs are the same.
4. The pressure in the O2 bulb is greater than the pressure in the NH 3 bulb.
5. The bulb containing O2 contains more molecules of gas.