孩子~你记住~如果是复分解反应,化合价是始终不变的~就是说~三价的铁还是三价的,二价的还是二价的~如果是置换反应~三价的铁一定变成二价~所以啊,氧化铁和盐酸~那就是三价的~
化学2312.1.0.123.10.0.1421.123.45312.0.45342.0.456786312.33123
1个回答
相关问题
-
﹙1+0.112+0.123﹚×﹙0.112+0.123+0.134﹚-﹙1+0.112+0.123+0.134﹚×﹙0
-
(0.1+0.12+0.123+0.1234)*(0.12+0.123+0.1234+0.12345)-(0.1+0.1
-
(100+0.123+0.245+8.9)x(0.123+0.245+8.9+12.71)-(100+0.123+0.2
-
123+123+12-147+0-0-85+45-42+12-23=
-
0.123除0.45=()除15
-
40.3乘123.123123-0.123乘40340.3403
-
0.123+0.321+0.234+0.432+0.345+0.543+……+0.789+0.987=?
-
123+0.89等于多少
-
0.123化成分数
-
1.23*16.8+32*0.123 简便