幾道關(guān)于分子原子的化學(xué)題.
1.葡萄糖是不是化合物?
2.下列哪一項(xiàng)是均勻混合物?
A.佳得樂 B.硫 C.葡萄糖 D.士力架
3.0.00160用科學(xué)計(jì)數(shù)法表示
A.1.6 x 10-3 B.1.60 x 10-3
4.7.50*6.00等于多少?
A.45 B.45.0
5.(1)某糖質(zhì)量為27.7克,其中糖占15%,求糖的質(zhì)量為多少?
a) 4.16 g b) 4.2 g
(2)這些糖為多少盎司?
a) 0.146 oz b) 0.15 oz
6.質(zhì)量和體積分別為19.754 g和14.6 ml 的物體,密度是多少?
a) 1.3530 g/ml b) 1.35 g/ml
7.下列哪項(xiàng)可以準(zhǔn)確地描述二氧化碳?
a.單原子 b.雙原子 c.同原子 d.雜原子
還有三道題實(shí)在不會(huì)翻譯,麻煩看一下英文.
1.a game of darts,the darts are scattered across the board.The thrower was()
a) accurate not precise b) precise not accurate
c) accurate and precise d) not accurate or precise
2.During a game of darts,all three darts hit high and left.The thrower was()
a) accurate not precise b) precise not accurate
c) accurate and precise d) not accurate or precise
3.20.During a game of darts,all three darts were close to the bullseye.The thrower was()
a) accurate not precise b) precise not accurate
c) accurate and precise d) not accurate or precise