【简答题】1.What is the empirical formula of the following compounds? a. a liquid containing 2.0g of hydrogen, 32.1g sulfur and 64.0g oxygen. b. a white solid containing 4.0g calcium,3.2g oxygen,0.2g hydrogen. c.a white solid containing 0.243g magnesium and 0.71g chlorine。 2. 3.888g...
Thus, two or more elements combine to form compounds.Answer and Explanation: Compounds are substances formed by combining two or more elements that always combine in a fixed ratio. Hence, compounds are composed of different.....
What is the name of the compound formed by Co2+ and O2-? What is the formula for the compound formed by the ions V5+ and CO32-? What is the formula of the compound formed by an iron(III) ion and oxygen? Which compound below has the same shape as NO_2 ion? (a) SO_2 (b) ...
The results showed significant differences in the properties of these molecules, which correlated with the magnitude of the n2 --> sigma * delocalization.关键词: Oxygen Bicyclo Compounds, Heterocyclic Nucleosides Kinetics Stereoisomerism DOI: 10.1093/nass/nrn275 被引量: 1 ...
Microbial mats are vast colonies of one-celled organisms … that were once the most prevalent form of life on Earth. And the study of stromatolites indicates that these ancient microbial mats interacted with minerals in the environment and left behind new compounds as waste products— ...
What are the physical properties of carbonate minerals? Recrystallization: Recrystallization is when a substance is dissolved so that it can be purified in a hot liquid. When the solvent cools down, the solution is saturated with the solute that crystalizes, or forms a solid again. Carbonate mine...
For example, the crystals of cinnoline 1,5-dioxides, molecules with an exocyclic oxygen atom of the 1,2,5-oxadiazole ring, are isostructural or nearly isostructural to the corresponding cinnoline 5-oxides, but their density and oxygen balance are higher. The calculated detonation parameters ...
Definition of a (Chemical) Mixture:Mixtures are formed by just mixing or 'intermingling' (another word which means the same as 'mixing') together two or more substances. Those substances may also be referred to as 'constituents' or 'components' - and may be either elements or compounds, ...
Antioxidants are compounds that inhibit or reduce the effects triggered by free radicals and oxidizing compounds. The phenylpropanoids act as antioxidants by eliminating oxygen free radicals and chelating pro-oxidant metal ions, especially iron. The hydroxyl groups of these molecules confer antioxidant acti...
Covalent compounds are formed when electrons are shared between the atoms and due to this sharing of electrons, they exhibit unique physical properties as compared to ionic compounds.Answer and Explanation: Some of the main properties of covalent compounds are : 1. Covalent compounds have a very...