помогите решить химические уравнения в рабочей тетради химия 9 класс автор ЕРЁМИН.тема галогены
Предмет:
ХимияАвтор:
bookermcdonaldZnSO4 + Ba(NO3)2 = BaSO4 + Zn(NO3)2
Zn(2+) + SO4(2-) + Ba(2+) + 2NO3(-) = BaSO4 + Zn(2+) + 2NO3(-)
SO4(2-) + Ba(2+) = BaSO4
Mg(NO3)2 + 2NaOH = 2NaNO3 + Mg(OH)2
Mg(2+) + 2NO3(-) + 2Na(+) + 2OH(-) = 2NO3(-) + 2Na(+) + Mg(OH)2
Mg(2+) + 2OH(-) = Mg(OH)2
2K3PO4 + 3CaCl2 = Ca3(PO4)2 + 6KCl
6K(+) + 2PO4(3-) + 3Ca(2+) + 6Cl(-) = Ca3(PO4)2 + 6K(+) + 6Cl(-)
2PO4(3-) + 3Ca(2+) = Ca3(PO4)2
K2CO3 + H2SO4 = CO2 + H2O + K2SO4
2K(+) + CO3(2-) + 2H(+) + SO4(2-) = CO2 + H2O + 2K(+) + SO4(2-)
CO3(2-) + 2H(+) = CO2 + H2O
2KOH + H2SO4 = K2SO4 + 2H2O
2K(+) + 2OH(-) + 2H(+) + SO4(2-) = 2K(+) + SO4(2-) + H2O
2OH(-) + 2H(+) = 2H2O
KCl c разбавленной серной кислотой реагировать не будет.
KNO3 тоже.
Zn2+ + 2OH- = Zn(OH)2
Zn2+ 2Cl- + 2K+ + 2OH- = Zn(OH)2 + 2K+ + 2Cl-
ZnCl2 + 2KOH = Zn(OH)2 + 2KCl
2H+ + SO3(2-) = H2O + SO2
2H+ + 2Cl- + 2K+ + SO3(2-) = H2O + SO2 + 2K+ + 2Cl-
2HCl + K2SO3 = H2O + SO2 + 2KCl
3Mg2+ 2PO4(3-) = Mg3(PO4)2
3Mg2+ 6Cl- + 6K+ + 2PO4(3-) = Mg3(PO4)2 + 6K+ + 6Cl-
3MgCl2 + 2K3PO4 = Mg3(PO4)2 + 6KCl
ЭТИ??
Автор:
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One day when Pooh Bear already (1.visit) some of his friends and had nothing else to do, he (2.think) he (3.go) round to Piglet`s house (4. see) what Piglet (5. do). It (6.snow) since early morning. Pooh (7.expect) (8.find) Piglet (9.warm) his toes in front of his fire, but to his surprise he (10.see) that the door (11.be) open, and the more he (12.look) inside the more Piglet (13.not, be) there. "So what I (14.do)," said Pooh, "is this. I (15.go) home first and see what the time (16.be), and perhaps I (17.put) a scarf round my neck, and then I (18.go) and (19.see) Eeyore ahd (20.sing) my new hum to him." He (21.hurry) back to his own house; when he (22.open) his door he suddenly (23.see) Piglet (24.sit) in his best armchair and looking as if he (25.sit) there for a long time. Pooh could only (26.stand) there (27.wonder) whose he (28.be) in. "Hallo, Piglet," he said. "I (29.think) you (30.be) out." "No," said Piglet."it`s you who (31.be) out. I (32.sit) here for an hour already." Pooh (33.look) up at his clock, which (34.stop) at five minutes to eleven some weeks before. "Nearly eleven o`clock," said Pooh happily. "You (35.be) just in time for a little something," and he (36.put) his head into the cupboard. "And then we (37.go) out, Piglet, and (38.sing) my song to Eeyore". "Which song, Pooh?" "The one we (39.be) going to sing to Eeyore," (40.explain) Pooh. The clock (41.show) still five minutes to eleven when Pooh and Piglet (42.set) out on their way half an later.
Предмет:
Английский языкАвтор:
mcduffwalterОтветов:
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Выберите уравнение с наименьшим корнем и решит его:
а)8274*3-у =1 908
8274 : 3 - у =1 908
у - 8274 *3 =1 908
б) 1 284 : d = 12 090 - 12 078
1 284 : d = 12 090 - 12 066
1284 : d = 12 090 - 12 084
Заранее Спасибо ^^
Предмет:
МатематикаАвтор:
oreo24Ответов:
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докажите что для любой арифметической прогрессии справедливо соотношение:
1)а13-а3=10d
2)An+10 - A10 = nd
составьте уравнения реакции взаимодействия водорода с: оксидом вольфрама 4 валентности,оксидом ртути 2валентности и оксидом меди 1 валентности,оксидом свинца 2 валентности..Какую роль игрет водород в этих реакциях? ПЛИИИИС