I can't do the chemistry questions in the new textbook of senior one.

P (pressure) V (volume) T (temperature) R (constant) N (amount of substance) M (mass) M (relative molecular mass)

After the above three formulas are replaced and transformed, we can get:

P = mrt/mv = rhort/m, so there are:

At the same temperature, the same mass and the same volume (that is, the same density), the pressure ratio of gas is equal to the inverse ratio of relative molecular mass.

Meter (neon) = 20m (H2) = 2m (oxygen) =32

Phosphorus (H2) > phosphorus (neon) > phosphorus (oxygen)