How many halogens are in gaseous state at room temperature and pressure?

Ethyle acetate at room temperature is a :

Explain why nearly all H atoms are in the ground state at room temperature and hence emit no light.

3g of H_(2) and 24g of O_(2) are present in a gaseous mixture at constant temperature and pressure. The partial pressure of hydrogen is

Estimate the average kinetic energy of hydrogen atoms (or molecules) at room temperature and use the result to explain why nearly all H atom sare in the ground state at room temperature and hence emit no light.

1 mole of sulphur dioxide occupies 24 dm^(3) at room temperature and pressure. Calculate at room temperature and pressure : weight of 0.5 g-molecules of sulphur dioxide. [S = 32 , O = 16]

1 mole of sulphur dioxide occupies 24 dm^(3) at room temperature and pressure. Calculate at room temperature and pressure : volume occupied by 80 g of sulphur dioxide.

1 mole of sulphur dioxide occupies 24 dm^(3) at room temperature and pressure. Calculate at room temperature and pressure : molecules in 0.64 g of sulphur dioxide, if 1 mole of sulphur dioxide contains N molecules.

1 mole of sulphur dioxide occupies 24 dm^(3) at room temperature and pressure. Calculate at room temperature and pressure : mass of 6 dm^(3) of sulphur dioxide gas.

In a permanent magnet at room temperature.

In a permanent magnet at room temperature.