In the chemistry experiment, a precipitate formed. What does this mean? A. A gas was released. B. A solid formed in the liquid. C. The liquid changed color. D. The temperature increased. 相关知识点: 试题来源: 解析 B。解析:有沉淀形成意味着液体中有固体形成。选项 A 有气体释放 ...
A related chemistry term is diatomic, which refers to a molecule made up of two atoms that can either be of the same element or of two different elements. Elements rarely exist in a monatomic state, especially if they are not in gas form. This is because atoms tend to cluster together...
In chemistry, a compound is a substance made up of two or more different chemicalelementscombined in a fixed ratio. When the elements come together, they react with each other and form chemical bonds that are difficult to break. These bonds form as a result of sharing or exchangingelectronsbe...
Question: What is HCl gas? Answer and Explanation:1 Chemical compounds are created when two or more chemical elements bond together. Each chemical compound has a specific chemical formula. For example,... Learn more about this topic: Hydrochloric Acid | HCl Formula, Chemical Properties & Uses ...
3. What is the woman likely to do? A. Make a phone call. B. Handle the problem. C. Have a rest. 4. Which tour does the man seem to be interested in? A. The evening tour. B. The half-day tour. C. The full-day tour. 5. Where are the speakers? A. At a canteen. B. ...
Some chemistry examples in everyday life include the burning of gasoline (a chemical reaction), sunscreen (chemical that reflect harmful ultraviolet light), and even breathing (the extraction of oxygen gas from the air). What is chemistry in simple words? Chemistry is the study of the substances...
What is the formula for the hydrogen sulfate ion? What is I2 in chemistry? What does H stand for in chemistry? What is the formula for sulfur dioxide? What is the formula for sulfur trioxide ? Identify which of the following is a strong or a weak acid a) HCl b) CH3COOH c) H2SO4...
The naming of esters can be confusing to students who are new toorganic chemistrybecause the name is the opposite of the order in which the formula is written. In the case of ethyl ethanoate, for example, the ethyl group is listed before the name. "Ethanoate" comes from ethanoic acid. Wh...
We explore the influence of charge state on the gas-phase chemistry at room temperature (here referred to as "charge state chemistry"). Illustrative examples are drawn largely from the author's own research, but also from the work of Paul Kebarle and others. Emphasis is given to reactions ...
The large abundance of CH4 suggests that the molecule is formed mainly through grain-surface reactions. CO2 may be produced by grain-surface chemistry as well, athough photochemical production in ices can also play a role. Comparison of gas-phase with solid-state column densities for the same ...