Гептадиен-2,3
А что надо-то?
<span><span>2 <span>PbS</span></span> + <span>3 <span>O2</span></span> → <span>2 <span>PbO</span></span> + <span>2 <span>SO<span>2
вроде так
</span></span></span></span>
Cu+HgO=CuO+Hg
CuO+H2=Cu+H2O
2Hg+O2=2HgO
ответ:А-CuO;Б-Hg.
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<span>1) CH3-CH=CH2+Br2-->CH3-CH-CH2</span>
<span> | |</span>
<span> Br Br</span>
<span>2) CH3- CH -(OH)- CH2-CH2-CH3 ->CH3-CH=CH-CH2-CH3+H2O</span>
<span>4) 2CH3CH2Br+2Na->C4H10+2NaBr</span>
<span>5) Ch3-CH2+COONa+ NaOH->2CH4+Na2CO3</span>
<span>6) CH3-CH2-CH=CH2+H2SO4->CH3-CH2-CH(OH)-CH3</span>