Question

СРОЧНО ПОМОГИТЕ ПОЖАЛУЙСТА ​

Answer 1

Ответ:

Объяснение:

Mr(Br2О7) = Ar(Br) * 2 + Ar(О) * 7 =  160 + 112 = 272

w(Br) = Ar(Br) * n/Mr(Br2O7) * 100% = 80 * 2/272 * 100% = 58,82%

w(О) = Ar(О) * n/Mr(Br2O7) * 100% = 16 * 7/272 * 100% = 41,18%

2)

Mr(Rb2CO3) = Ar(Rb) * 2 + Ar(C) + Ar(O) * 3 = 85 * 2 + 12 + 16 * 3 = 230

w(Rb) = Ar(Rb) * n/Mr(Rb2CO3) * 100% = 85 * 2/230 * 100% = 73,91%

w(C) = Ar(C) * n/Mr(Rb2CO3) * 100% = 12/230 * 100% = 5,22%

w(О) = Ar(О) * n/Mr(Rb2CO3) * 100% = 16 * 3/230 * 100% = 20,87%