We call this kind of change ‘evaporation’★Some gases can be turned into solids. We call this kind of change ‘condensation’.”可知,把气体变成液体在文章中没有提及到。故选D。 (4)题详解: 推理判断题。通读全文以及“Everything in our world comes in three different states: solids (固体),...
It is a mixture of different gases可知正确答案.故答案为C.(4).【答案】A【解析】由原文第三段的If 1000 dots can represent the air, then 776 of them are nitrogen, 210 are oxygen, 11 are argon可知正确答案.故答案为A. 结果一 题目 2.阅读理解。What is air? Air is not just one gas....
A mixture of three gases [Ar, Ne, and CO_2] has a total pressure of 1.2 atm. If the mixture of gases is composed of 25.0 g of each gas, what is the partial pressure of Ne? A mixture of 8.00 g He and 26.5 g Ne has a pressure of 820. mm Hg. What is the partial pressure ...
What is a mixture?lthough the air we breathe seems like a single(or pure) substance, it is actually aixture of many substances.Air consists of nitrogen(oxygen)carbon dioxide and other gases.Like air,all of the natural and manufactured materials on Earth can be put into one of two categori...
A mixture of gases is made up 0.48 mol of Ar and 0.94 mol of N2 with a total pressure of 1.68 atm. What is the partial pressure of Ar? Partial Pressure: In a gas mixture, more than one gas is present and the total ...
aApart from statistics, it might be helpful to look at what smoking tobacco does to the human body. Smoke is a mixture of gases , vaporized chemicals, minute particles of ash and other solids. There is also nicotine, which is powerful poison, and black tar. As smoke is breathed in , ...
Gasohol is a mixture of gasoline and ethanol (ethyl alcohol). Specifically, nine parts gasoline to one part ethanol. We make ethanol by fermenting corn and other agricultural produce. In fact, you can ferment any sugary or starchy plant to produce ethanol. Gasohol is a fuel for internal ...
What is the pressure of a mixture of gases? What is the pressure (in mmHg) of the gas inside the manometer apparatus below if P_bar. = 740 mmHg, h_1 = 30 mm, and h_2 = 50 mm? A sample of N_2 O has a density of 3.05 \frac{g}{L} at 298 K. What must be the pressure...
And this includes solids, liquids and gases. And if we combine two portions of matter, we get a mixture. Now, there are two main kinds of mixtures: homogeneous and heterogeneous. Maybe I should put this on the board. Whether a mixture is homogeneous or heterogeneous... well... this rela...
What is the pressure of a mixture of gases? The rate of effusion of oxygen to an unknown gas is 0.935. What is the other gas? The rate of effusion of oxygen to an unknown gas is 0.935. What is other gas? What ...