皮皮学，免费搜题
登录
搜题
【简答题】
已知某种燃料含有碳、氢、氧三种元素。为了测定这种燃料中碳和氢两种元素的质量比，可将气态燃料放入足量的O 2 中燃烧，并将产生的气体全部通过图示装置，得到如表所列的实验数据（产生的气体完全被吸收）。 根据实验数据填空： (1)实验完毕后，生成物中水的质量为_______g，假设广口瓶里生成一种正盐，其质量为 ____g。 (2)生成的水中氢元素的质量为____g。 (3)生成的CO 2 中碳元素的质量为____g。 (4)该燃料中碳、氢元素质量比为____。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】He was a handsome young man, usually ________, in pleasant contrast to Tottenhoe ’s glumness.
A.
lightheaded
B.
upset
C.
cheerful
D.
thoughtful
【单选题】You can’t believe that he wasa_________model when he Was young． A.tall handsome fashion###
A.
You can’t believe that he wasa_________model when he Was young． A.tall handsome fashion
B.
fashion tall handsome
C.
tall fashion handsome
D.
handsome fashion tall
【单选题】Tigers _______ meet-eating animals ________ meats.
A.
belonged to; feed on
B.
belonging to; feed on
C.
were belonged to; feed on
D.
belonging to; feeding on
【单选题】—______ —He is tall and handsome. [ ]
A.
What is he look like
B.
Who is he
C.
What is he like
D.
How is he
【单选题】如下事件过程： Function Feed(x) If x ＜10 Then Feed=X Else Feed=10+x End If End Function Private Sub Command1_Click( ) x=Val(Input Box(' '，0)) pay=Feed(x) Print pay End Sub 运行时在输入框内输入变量x的值为15，输出结果为
A.
0
B.
15
C.
25
D.
30
【单选题】You can’t believe that he wasa_________model when he Was young．
A.
tall handsome fashion
B.
fashion tall handsome
C.
tall fashion handsome
D.
handsome fashion tall
【单选题】______ fantail goldfish ______ bad for it. [ ]
A.
Feed, much are
B.
To feed, many is
C.
Feeding, many are
D.
To feed, much is
相关题目：
参考解析：
知识点：
题目纠错 0
发布
