<span><span>б)Na2S</span> + <span>H2SO4</span> → <span>H2S</span> + <span>Na2SO<span>4
</span></span></span><span><span>в)Cu<span>(OH)</span>2</span> + <span>2 <span>HNO3</span></span> → <span>Cu<span>(NO3)</span>2</span> + <span>2 <span>H2<span>O
г)</span></span></span></span><span><span>CuO</span> + <span>2 <span>HCl</span></span> → <span>CuCl2</span> + <span>H2<span>O
д)</span></span></span><span><span>KNO3</span> + <span>NaOH</span> → <span>NaNO3</span> + <span>KO<span>H
</span></span></span>
См=моли делить на объм в мл.отсюда=0.18 моль хлорида натрия.
0.18 умножаем на 58.5=10.53 г хлорида натрия