百度试题 题目This chemical is made ( )a special formula. A.fromB.ofC.according toD.in相关知识点: 试题来源: 解析 C [答案]C[解析] “according to”为“根据……”之意。本句翻译为“该化学品是通过这个公式制成的”。反馈 收藏
Water, which is a chemicalcompoundof hydrogen and oxygen in the ratio two hydrogen atoms for every oxygen atom, contains H2O molecules.Sodium chloride is a chemical compound formed fromsodium(Na) andchlorine(Cl) in a 1:1 ratio. Although the formula forsodium chlorideis NaCl, the compound does...
The water on the surface of Earth is found mainly in its oceans (97.25 percent) and polar ice caps andglaciers(2.05 percent), with the balance in freshwater lakes, rivers, andgroundwater. As Earth’s population grows and the demand for fresh water increases,water purificationand recycling beco...
Topics discussed include the implication of petroleum prices for global economy, the importance of capital investments for chemical companies, and the contribution of energy markets for global economic development.EBSCO_AspChemical Week
美 英 un.化学方程式;化学反应式;化学反应方程式 网络化学式 复数:chemical equations 英汉 英英 网络释义 un. 1. 化学方程式 2. 化学反应式 3. 化学反应方程式 例句
Thechemicalmust be salted out and allowed to dry. 必须把这种化学物质加盐分离出来并让它变干. 《简明英汉词典》 Thechemicalformula for water is H 2 O. 水的化学分子式是H 2O. 《简明英汉词典》 Thechemicalfertilizer should be well dug in. ...
The Graphic representation of chemical formulae in the publications of international nonproprietary names (INN) for pharmaceutical substances 来自 bases.bireme.br 喜欢 0 阅读量: 284 作者: Geneva World Health Organization 关键词: Medicamentos Genéricos Compostos Químicos Compostos Químicos Estrutura ...
To obtain an optimal formula for stability and sensory characteristics, an optimization process was performed [14]. Based on the experimental results, a set of constraints were applied to the developed models of the most important responses defining the texture (firmness, consistency, adhesiveness, ...
Compound 1 was obtained as a white amorphous powder, and its molecular formula was analyzed as C27H38O12 by HRESIMS (m/z 577.2260 [M + Na]+, calculated 577.2261 for C27H38NaO12). The NMR spectra of 1 showed two stereoisomers: 1a and 1b (5:3). In the 1H NMR spectrum of 1a (...
Dive deep into the insightful analysis of the latest chemical industry with ECHEMI Magazine on Pharmaceutical, Food Additives, and other chemical categories. Chemical Products Encyclopedia Explore everything you need to know about chemical products with CAS NO., chemical names, or formula.Pharmaceutical...