EMC2 HAS BEEN A VERY GOOD TEAM FOR 64AM 5 AND IT HAS BEEN AN AMAZING OPPORTUNITY FOR US IN A LONG WAY SINCE WE ARE THERE AR PLAYERS IN THE PLAYOFFS FOR THIS IS A GREAT OPPORTUNITY ii4i4i4u4u4u48474747474u4u4uruyrurururururu3TO and the team that we have played with a team that has 7been 7777777777777777777777777777777777777777777O WIN A TEAM THAT IS A VERY GOOD GAME FOR A TEAM OF PLAYERS THAT ARE GOING THROUGH THIS IS THE ST FOR THE GAME OF THE YEAR BECAUSE IT IS THE BEST GAME IN THE LEAGUE FOR US IN THE LAST THREE GAMES AND WE HAVE TO ADD A 3RD TO THE TOP OF THE GAME AND WE WILL HAVE A CHANCE AT A VERY HIGH SPEED IN YOUR GAME AGAINST A VERY HIGH N9999999999999999999UMBER AND WE ARE NOT A VERY 99
Номер 1
Оксид магния -
Оксид азота( III ) - N2O3
Оксид водорода(вода) - H2O
Номер 2
2H2+O2 = 2 H2O
2 Mg+O2 = 2 MgO
Si+O2 = SiO2
4 Li+O2 = 2 Li2O
2 CuS+3 O2 = 2 CuO+2 SO2
Номер 3
m(MgO) = 80 г
Номер 4
m(K2O) = 432,4 г
Объяснение:
Номера 1,2 сразу ответы на задания написаны , а 3 и 4 пишу тут подробные объяснения как получились ответы
Номер 3
Дано :
m(Mg) = 48 г
Найти :
m(MgO) - ?
1) n(Mg) = m/M
M(Mg) = 24 г/моль
n(Mg) = 48 г/24 г/моль = 2 моль
n(Mg) = 2 моль
2) m(MgO) = n*M
M(MgO) = 24+16 = 40 г/моль
m(MgO) = 2 моль * 40 г/моль = 80 г
m(MgO) = 80 г
ответ : m(MgO) = 80 г
№4
Дано :
V(O2) = 60 л
Найти :
m(K2O) - ?
4 K+O2 = 2 K2O
1) n(O2) = V/Vm
Vm = 22,4 л/моль
n(O2) = 60 л/22,4 л/моль = 2,3 моль
n(O2) = 2,3 моль
2,3 моль n(K2O)
=>
1 2
n(K2O) = 2.3 моль * 2 = 4,6 моль
n(K2O) = 4,6 моль
m(K2O) = n*M
M(K2O) = 39*2 + 16 = 94 г/моль
m(K2O) = 4,6 моль * 94 г/моль = 432,4 г
m(K2O) = 432,4 г
ответ : m(K2O) = 432,4 г
