Caculate the mass of `1cm^(3)` of oxygen kept at STP.

Explanation

`n=(PV)/(RT)= (1 xx 1 xx 10^-3)/( 0.082 xx 273 )= 10^-3/22.4`
` mass= ((10^-3 xx 32)g)/224 `
` = 1.428 xx 10^-3 g `
` =1.428 mg `