Salt water is a/an ___. A. element B. compound C. mixture D. solution 相关知识点: 试题来源: 解析 D。盐水是溶液。选项 A“element”是元素;选项 B“compound”是化合物;选项 C“mixture”是混合物,盐水严格来说是溶液;选项 D“solution”是溶液。反馈...
试题来源: 解析 D The solution is a mixture of salt and water. 该方法利用盐溶于水而沙不溶的性质进行分离。第一步,将岩盐粉碎并加入温水,盐溶解形成盐水溶液,沙子则沉淀在底部。第二步,过滤将沙子与盐水溶液分离。第三步,蒸发水分,得到盐晶体。因此,溶液是盐和水的混合物,正确答案为D。
When salt is dissolved in water, it forms a solution. What do we call the substance that is dissolved (in this case, salt)? A. Solvent B. Solute C. Mixture D. Compound 相关知识点: 试题来源: 解析 B。解析:在溶液(solution)中,被溶解的物质叫做溶质(solute),这里盐是溶质。溶剂(solvent)...
3 Rock salt is a mixture of sand and sodium chloride. B Sodium chloride is soluble in water but not in hexane.Sand is insoluble in both water and hexane.What is required to separate the sand from the sodium chloride?1 filter paper2 fractionating column3 hexane4 water A 1 and 3 B 1 ...
百度试题 结果1 题目(2)This is a mixturewater and salt.这是一种由水和盐构成的混合物。 相关知识点: 试题来源: 解析 consisting of/made up of∴CN 反馈 收藏
A. adding water to dissolve the salt B. filtering the mixture C. evaporating the water D. weighing the mixture 相关知识点: 试题来源: 解析 D。解析:在分离盐和沙的混合物实验中,通常第一步是称量混合物,这样可以得到混合物的初始质量等数据。A选项加水溶解盐不是第一步;B选项过滤混合物是在溶解之后...
In a mixture, the ratio of salt to water is 0.25 : 1. If there is 1 liter of water, how much salt is there? A. 0.25 liters B. 0.5 liters C. 0.75 liters D. 1 liter 相关知识点: 试题来源: 解析 A。比例为 0.25 : 1,1 升水对应的盐就是 0.25 升。
aSome salt solution with a concentration of 70% is mixed up with some salt solution with a concentration of 58%.And the new solution had a concentration of 62%.If we take 15 more liters of each solution,the mixture we get will have a concentration of 62.25%.How many liters of ...
A solution is a mixture of one substance dissolved in another so the properties are the same throughout. A solution is composed of a solute and the solvent. The solute is the substance being dissolved and the solvent is the part of the solution that does the dissolving. The solute is of...
Salt, Air, Water, Alum, Sugar Solution Answer: Air Two matters do not combine with chemically called mixture. Air is the mixture of gases like N2, O2, H2. Alum is an addition compound (pure) (K2SO4. Al2(SO4)3.24H2O). Salt is a compound, (pure). Chemical formula of common salt...