Which of the following are correct statements? (Could be as many as 4)
1. One mole of gas contains 22.4 representative particles
2. Standard pressure is 100 mm Hg
3. One mole of a gas must have the same volume as one mole of any other gas at STP
4. Gas molecules are spaced far away from each other at STP
5. Liquids can be greatly compressed
6. Standard pressure is 101.3 atmospheres
7. Gases can be compressed
i think 1 and 3 are right..? but the other 2? is 1 & 3 right?