M(H2O) = m(розчину)-m(cоди)
m(соди) = 300 г*0,6 = 180 г
m(H2O) = 300 г - 180 г = 120 г
Відповідь: 120 г
4 AL + 3 O2 = 2 AL2O3
<span>Al2O3+ 6 HCl = 2 AlCl3 + 3 H2O </span>
<span>AlCl3 + 3 NaOH = Al (OH)3 + 3 NaCl </span>
<span>2 Al(OH)3 = Al2O3 + 3 H2O</span>
Здравствуйте.
1. 4NO₂ + O₂ + 2H₂O = 4HNO₃
t
2. AgNO₃ = 2Ag + 2NO₂ + O₂
3. <span>4Al + 3C = Al</span>₄C₃
4. WO₃ + 3H₂ = W + 3H₂<span>O
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</span>5. 4Fe(NO₃)₃<span> = 2Fe</span>₂O₃ + 12NO₂ + 3O₂
t
6. <span>(NH</span>₄<span>)</span>₂<span>Cr</span>₂<span>O</span>₇<span> = Cr</span>₂<span>O</span>₃<span> + N</span>₂<span> + 4H</span>₂<span>O</span>
2Na + Cl2 = 2NaCl
Cu + H2O = Cu(OH)2