Какую массу(г.) и какой объем(л.н.у.) водорода можно получить путем воздействия избыточным колличеством соляной кислоты на 26 г цинка

5г                                              хл

2KMnO4    =   K2MnO4+ MnO2+ O2

v=2моль                                    v=1моль

М=158г/моль                             Vm=22,4л/моль

m=316г                                      V=22,4л

сост.пропорцию

5гхл

316г22,4л

х=(22,4л*5г)/316г=0,35л через моль

v(KMnO4)=5г/(158г/моль)=0,032моль

v(O2)=v(KMnO4)/2=0,032моль/2=0,016моль

V(O2)=0,016моль*22,4л/моль=0,35л

5г                              хл

2KClO3   =    2KCl+3O2

v=2моль                    v=3моль

M=122,5г/моль           Vm=22,4л/моль

m=245г                       V=67,2л

5гхл

245г---67,2л

х=(67,2л*5г)/245г=1,34л

2)v(KClO3)=5г/(122,5г/моль)=0,04моль

v(O2)=v(KClO3)*1,5=0,04моль*1,5=0,06моль

V(O2)=0,06моль*22.4л/моль=1,34л

при разложении 5г хлората калия получится больше кислорода,чем при разложении 5 г перманганата калия

Упражнение 1. 1 – will do / Will I do - ? / I will not do - (=I won't do), 2 - will work / Will he work - ? / He will not work - (=He won't work -), 3 – will sleep / Will she sleep - ? / She will not sleep - (=She won't sleep -), 4 - will work / Will we work - ? / We will not work - (=We won't work -), 5 – will drink / Will they drink - ? / The will not drink - (=They won't drink -), 6 – will be / Will Mike be - ? / Mike will not be - (=Mike won't be -), 7 - will have / Will Helen have - ? / Helen will not have - (=Helen won't have -), 8 – will be / Will you be - ? / You will not be - (=You won't be - ), 9 – will be / Will you be - ? / You will not be - (=You won't be - ), 10 – will be / Will it be - ? / It will not be - (=It won't be -).

Упражнение 2. 1 – will have, 2 – will be, 3 – will be, 4 – will get, 5 – will go, 6 – will be, 7 – will do, 8 – will have, 9 – will go, 10 - will take, 11 – will take, 12 – will speak, 13 – will call, 14 – will take, 15 – will go.