It takes john 25 minutes to walk to the park and 45 to drive to walk at what time should he get at the house in order to get to work at 9 am
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Ответы на вопрос:
а) 1) K2O + H2O = 2 KOH
2) 2 KOH + H2CO3 = 2 H2O + K2CO3
3) K2CO3 + H2SO4 = H2O + CO2 + K2SO4
б) 1) Fe(OH)2 = H2O + FeO
2) 2 HCl + FeO = H2O + FeCl2
3) FeCl2 + 2 NaOH = 2 NaCl + Fe(OH)2
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