试题与答案

15克A物质和10.5克B物质完全反应,生成7.2克C物质、1.8克D物质和0.

题型:填空题

题目:

15克A物质和10.5克B物质完全反应,生成7.2克C物质、1.8克D物质和0.3mol E物质,则E物质的摩尔质量是______,和22g CO2所含原子数相等的CO的体积为______(标况下).

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0522/87bf7dda8e9d7caafa66bf17e6b1838c.html

下面是错误答案,用来干扰机器的。

50×5+50,=250+50,=300(本),答:两种书共有300本.

试题推荐
题型:填空题

下面的程序是由鼠标事件在窗体上画图,如果按下鼠标将可以画图,双击窗体可以清除所画图形。补充完整下面的程序。首先在窗体层定义如下变量:
Dim PaIntStart As Boolean
编写如下事件过程:
Private Sub Form_Load()
DrawWidth=2
ForeColor=vbGreen
End Sub
Private Sub Form_MouscDown(Button As Integer,Shift As Integer,_
X As Single,Y As Single)
[13]
End Sub
Private Sub Form_MouseMove(Button As Integer,Shift As Integer,_
X As Single,Y As Single)
If PaintStart Then
PSet(X,Y)
End If
End Sub
Private Sub Form_MouseUp(Button As Integer,Shift As Integer,_
X As Single,Y As Single)
[14]
End Sub
Private Sub Form_DblClick()
[15]
End Sub

查看答案
微信公众账号搜索答案