M(<span>H3PO4)=98 <span>г/моль</span></span><span>M(<span>KMnO4)=158 <span>г/моль</span></span></span><span><span><span>M(<span> NH3</span></span><span>)=17 <span>г/моль</span></span></span></span><span><span><span><span>M(<span>HNO3</span></span><span>)=63 г/моль</span></span></span></span>
<span> p=F/S S=F/p=2/200000000=1*10^-8 метров квадратных. или 0.01 мм^2</span>