Compound X has a molar mass of 283.89 mol^-1 and the following composition: element mass %
phosphorus 43.64%
oxygen 56.36%

Write the molecular formula of X .

Label a-f based on the table using c for concentrated and d for dilute

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.