几道关于分子原子的化学题.
1.葡萄糖是不是化合物?
2.下列哪一项是均匀混合物?
A.佳得乐B.硫C.葡萄糖D.士力架
3.0.00160用科学计数法表示
A.1.6x10-3B.1.60x10-3
4.7.50*6.00等于多少?
A.45B.45.0
5.(1)某糖质量为27.7克,其中糖占15%,求糖的质量为多少?
a)4.16gb)4.2g
(2)这些糖为多少盎司?
a)0.146ozb)0.15oz
6.质量和体积分别为19.754g和14.6ml的物体,密度是多少?
a)1.3530g/mlb)1.35g/ml
7.下列哪项可以准确地描述二氧化碳?
a.单原子b.双原子c.同原子d.杂原子
还有三道题实在不会翻译,麻烦看一下英文.
1.agameofdarts,thedartsarescatteredacrosstheboard.Thethrowerwas()
a)accuratenotpreciseb)precisenotaccurate
c)accurateandprecised)notaccurateorprecise
2.Duringagameofdarts,allthreedartshithighandleft.Thethrowerwas()
a)accuratenotpreciseb)precisenotaccurate
c)accurateandprecised)notaccurateorprecise
3.20.Duringagameofdarts,allthreedartswereclosetothebullseye.Thethrowerwas()
a)accuratenotpreciseb)precisenotaccurate
c)accurateandprecised)notaccurateorprecise