<span> Какое вещество пропущено в цепочке превращений?</span>
<span> Ca CaO </span><span>…. </span><span> CaCI</span><span>2</span>
<span> A.</span><span> CaO</span><span>2</span><span> </span><span>Б</span><span>. CaН</span><span>2</span><span> </span><span>B. </span><span>Ca(OH)</span><span>2</span><span> </span><span>Г.</span><span> CaCO</span><span>3</span>
<span>Схеме превращений S</span><span>-2</span><span> S</span><span>0</span><span> соответствует уравнение</span>
<span>А.</span><span>H</span><span>2</span><span>S+Pb(NO</span><span>3</span><span>)</span><span>2</span><span> =PbS +2HNO</span><span>3</span><span> </span>
<span>Б.</span><span> 2H</span><span>2</span><span>S +3O</span><span>2</span><span> = 2H</span><span>2</span><span>O +2SO</span><span>2</span>
<span>В</span><span>. 2H</span><span>2</span><span>S +O</span><span>2</span><span> =2H</span><span>2</span><span>O + S </span>
Г. 2Na + S= Na2S
<span> Какой буквой обозначен фрагмент молекулярного уравнения химической реакции, соответствующий кратному ионному уравнению</span>
<span> 2H</span><span>+</span><span> + S</span><span>2-</span><span> = H</span><span>2</span><span>S</span>
<span>А.</span><span> Na</span><span>2</span><span>S + 2HCI= …. </span>
<span>Б.</span><span> H</span><span>2</span><span>O + SO</span><span>2 </span><span> = ….</span>
<span>В.</span><span> FeS + 2HCI= …. </span>
<span>Г</span><span>.K</span><span>2</span><span>SO</span><span>3 </span><span>+ 2HCI = …</span>