A. Compounds are the basic building blocks of all substances. B. Pure substances composed of two or more materials are called compounds. C. The ionic compounds are held together in a crystalline structure by attractive forces of positive an negative charges. D. A mixture contains two or more...
The liquid which dissolves it, is called the solvent.If two liquids mix together completely, then they are called miscible otherwise they are immiscible. Which of the following substances is insoluble in water? ASugar BFine sand CCopper sulphate DCommon saltSubmit Which of the following is (a...
a. orange juice b. wine c. steam d. oxygen e. vegetable soup Pure substances: Pure substances are made from only one type of particles and a constant structure. The properties or the chemical composition of the pure substances remain th...
What are complex ions and how are complex ions formed and named? Write the formula of the complex formed between the following substances: Ethylenediamine (en) (the ligand) and nickel(II) ion (assume a coordination number of 6). Write the formul...
The invention relates to compounds which delay the release of active substances. The invention also relates to a method for the production thereof. The compounds are produced, for instance, by wet or spray granulation, spray drying or extrusion of a conventional filling material (e.g. ...
preparation and use of substances capable of converting a high energy radiation into visible or near-visible radiation. < / p & gt; & lt; p & gt; it is more particularly oxybromides yttrium, lanthanum, gadolinium or activated by trivalent cerium, and whose particles are advantageously stabilize...
It might be said that the neuromuscular junctions are shielded from applied drugs, but the prompt actions of y-aminobutyric acid, picrotoxin, and Factor S argue against this interpretation. So far only two substances are known to excite Crustacean muscle in anything approaching physiological ...
A chemical bond is a lasting attraction between two or more atoms that allows for the formation of chemical compounds. An example is covalent bonding, where valence electrons are shared between two or more atoms. Electronegativity is the tendency of an atom in such a bond ...
Which of the following compounds is a weak acid? a. HCl. b. H3PO4. c. HNO3. d. HClO4. e. H2SO4.Weak AcidsWeak acids are compounds that do not completely ionize in water and produce a lower concentration of hydrogen ions compared to strong a...
Question: Which of the following organic compounds are used to manufacture steroid hormones in the body? A. Polysaccharides B. Glucose C. Cholesterol D. Protein Hormones: Hormones are the chemical messengers in the body that are produced...