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anastachka
@anastachka
June 2022
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Даю 20 баллов!Срочно ,химия(7 класс)номера 4 и 5
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krioira
11.2г Х
KOH
+
HCl
→
KCl
+
H2
O
1 моль 1 моль
56 74,5
M(KOH)=39+16+1=56 (г/моль)
M(KCl)=39+35.5=74.5 (г/моль)
Х=11,2*74,5/56=14,9 (г)
Ответ: 14,9 г
NaOH+CuO → NaO+CuOH
2
NaOH
+
H2SO4
→
2
H2O
+
Na2SO4
2
NaOH
+
CO2
→
Na2CO3
+
H2O
6
NaOH
+
P2O5
→
2
Na3PO4
+
3
H2O
3
NaOH
+
FeCl3
→
3
NaCl
+
Fe
(OH)
3
2 votes
Thanks 1
anastachka
Спасибо большое:)
krioira
Всего хорошего
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Answers & Comments
KOH + HCl → KCl + H2O
1 моль 1 моль
56 74,5
M(KOH)=39+16+1=56 (г/моль)
M(KCl)=39+35.5=74.5 (г/моль)
Х=11,2*74,5/56=14,9 (г)
Ответ: 14,9 г
NaOH+CuO → NaO+CuOH
2NaOH+H2SO4 → 2H2O+Na2SO4
2NaOH+CO2 → Na2CO3+H2O
6NaOH+P2O5 → 2Na3PO4+3H2O
3NaOH+FeCl3 → 3NaCl+Fe(OH)3