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 ...
Each of the so-called noble gases — helium, neon, argon, krypton, xenon, and radon— is naturally a monatomic gas at standard temperature and pressure. The term has a somewhat different meaning when it comes to ions, since monatomic ions are made up of only one element, but each such ...
Re:What cause gas pressure? «Reply #20 on:August 07, 2004, 02:16:29 AM » Thanks.But ironically you increased my troubles by giving the answer.I am an Indian,preparing for the entrance examination of Engineering.And we got the worst writers of CHEMISTRY and PHYSICS Books here in Ind...
Well, I'd naturally think of my relationship with my mother. Whenever I need help, my mother is always there for me. She often tells me that I can be anyone I want, as long as I'm confident of myself. She sees my talent and pushes me to do the best I possibly can. As I was...
Recent results of searches for IR absorption lines of gas-phase molecules in the ISO spectra of embedded massive young stars are discussed. Abundant, highly excited gas-phase H2O is detected in the 'hot cores' surrounding the young stellar objects, but not in the colder regions. The abundance...
What is a dissolved substance called? For hydrogen, what is the energy of the first excited state? What is the ion product constant for water? Name two major constituent gases of atmosphere What is HCl gas? Define water of hydration in chemistry ...
The scientific study of matter's characteristics and behaviour is known as chemistry.andare different from the normal vocabulary. It is a branch of natural science that examines the building blocks of matter, including the atoms, molecules, and ions that make up compounds and their composition, ...
slang term for the older term, "alchemist." Modern chemistry is generally thought to have begun in the 17th century, most prominently with the experiments and writings of Robert Boyle. It was Boyle that formulatedBoyle's law, which holds that the temperature and volume of a gas are related...
At these conditions, the volume of 1 mol of a gas is 24.0548 L. Like STP and NTP, standard ambient temperature and pressure (SATP) is also used in chemistry as a reference standard. It is defined as the following: Temperature: 25 degrees Celsius (298.15 degrees Kelvin) ...
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