Question

Determinati masa de acid sulfhidric(H2S) care contine 48,176*10 la puterea 23 electroni pusi in comun.
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Answer 1

o molecula de H2S are 4 electroni pusi in comun...2 de la S si cate unul de la fiecare atom de H
[tex]M_{H2S}=2A_{H}+A_{S}=2*1+32=34 [/tex]
[tex]1 mol=6.022*10^{23} molecule [/tex]
intr-o molecula sunt 4 electroni pusi in comun,deci intr-un mol:$4*6.022*10^23=24.088*10^{23}$
$32 g H_{2}S......24.088*10^{23}$ e pusi in comun
$x g H_{2}S.....48.176* 10^{23}$ e pusi im comun
x=$\frac{32*48.176*10^2^3}{24.088*10^{23}} =64 g H_{2}S$