The number in front of a chemical formula in an equation is called ___. A. coefficient B. exponent C. subscript D. superscript 相关知识点: 试题来源: 解析 A。解析:化学方程式中化学式前面的数字叫做系数(coefficient)。指数是(exponent),下标是(subscript),上标是(superscript)。反馈...
chemical equation 化学守恒 就是化学反应 不产生 也不消灭 分子或原子 chemical formula 化学反应式 就是描述化学反应过程的式子
CHEMICAL FORMULA Everyone knows at least one chemical formula H2O This represents the presence of 2 Hydrogens and one oxygen in every molecule of water Any number below the line applies to the element in front of it CHEMICAL FORMULAS & RATIOS Molecules have very specific numbers of atoms present...
Related to equation, chemical:chemical formula,chemical reaction n (Chemistry) a representation of a chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product Collins English Dictionary – Complete and Unabridged, 12th Edition...
必应词典为您提供chemical-equation的释义,un. 化学方程式;化学反应式;化学反应方程式; 网络释义: 化学式;
A chemical equation is composed of chemical formulas. It has reactants on the left and products on the right side of an arrow symbol (→). The arrow is usually read out as ‘yields’. In an equation, all chemical formulae on one side are separated by a plus sign. The physical state...
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special form of oxygen withthechemical formulaO3. un.org un.org 臭氧是分子式为O3的氧气的特殊形式。 un.org un.org Itschemical formulaisSiO2 and its transparent crystals have a moderate refractive index. filmetrics.com filmetrics.com 化学分子式为SiO2,是有着中等折射率的透明晶体。
Chemical formulae provide information about a compound’s chemical makeup. They also show how the basic parts interact to generate the compound. When representing a compound in a chemical equation, its chemical formula is critical. Ions, radicals, and other chemical species can also be represented...
Calculationsinvolvingchemical equation Stoichiometry(化學計量學)p.19 FormulaeofCompounds 3.1Formulaeofcompounds(SBp.43) Empiricalformula Showsthesimplestwholenumberratiooftheatomsorionspresent E.g. Methane, CH4 Sodiumchloride, NaCl 3.1Formulaeofcompounds(SBp.43) ...