ответ: Mr(H2S)=2+32=34
w(H)=2*100% : 34= 5,88%
w(S)=32*100% : 34= 94,12%
Mr(CuO) = 63,5 + 16 = 79,5
w(Cu) = 63,5 *100% : 79,5 = 79,87%
w( O ) = 16 * 100% : 79,5 = 20,13%
Mr( KMnO4 )= 39+55+64= 148
w(K)= 39*100% : 148=26,35%
w( Mn ) = 55* 100% : 148=37,16%
w(O) = 64 *100% : 148=47,49%
Объяснение:
ответ: Mr(H2S)=2+32=34
w(H)=2*100% : 34= 5,88%
w(S)=32*100% : 34= 94,12%
Mr(CuO) = 63,5 + 16 = 79,5
w(Cu) = 63,5 *100% : 79,5 = 79,87%
w( O ) = 16 * 100% : 79,5 = 20,13%
Mr( KMnO4 )= 39+55+64= 148
w(K)= 39*100% : 148=26,35%
w( Mn ) = 55* 100% : 148=37,16%
w(O) = 64 *100% : 148=47,49%
Объяснение: