15. What happens to water molecules when water freezes? ( ) A. They become arranged more regularly. B. They become smaller. C. They move much closer together. D. They move faster. 相关知识点: 试题来源: 解析 A 当水结冰时,水分子会形成一个有序的晶格结构,排列更加规律。因此,正确答案是 ...
What type of intermolecular force occurs in a sample of water? (a) Dispersion force (b) Dipole force (c) Hydrogen bond (d) Both (a) and (c). What type(s) of intermolecular forces are expected between BeBr_2 molecules? Choose all ...
Which molecules are pushed closer to gether during compression of soun... 01:56 What is the function of the narrow slit in the vocal cords of larynx ? 02:18 Where is larynx located in human beings ? 01:55 Which organ helps in generating sound in human beings ? 03:05 What is the fre...
or of different elements, as with water (H2O). As components of matter, molecules are common in organic substances (and therefore biochemistry) and are what allow for life-giving elements, like liquid water and breathable atmospheres.
However, the properties of many molecules, including the water molecule, are known to be sensitive to their surroundings and their states of aggregation. For instance, the average O鈥 distance in the gaseous water dimer is 2.98 , while in liquid water it is only ~2.85 , and in normal ice...
purification and as an organic synthetic intermediate. It is commonly used in organic synthesis and medicinal chemistry as a tool for drug molecule modification and the synthesis of organic active molecules. It can undergo 1,2-addition reactions with nucleophilic reagents and 1,4-Michael addition ...
The molecules that result from the complete carbohydrate digestion are monosaccharides such as glucose, fructose, and galactose. The complete...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough homework an...
Nonpolar molecules do not dissolve easily in water. They are described as hydrophobic, or water fearing. When put into polar environments, such as water, nonpolar molecules stick together and form a tight membrane, preventing water from surrounding the molecule. Water's hydrogen bonds create an en...
As you continue heating the water, the molecules gain enough energy to transition from the liquid phase to the gaseous phase. These bubbles are water vapor. When you see water at a "rolling boil," the bubbles are entirely water vapor. Water vapor bubbles start to form on nucleation sites,...
What is the mole-to-mole ratio between oxygen gas and water? The reaction is 2C8H18+25O2→16CO2+18H2O. Stoichiometry:In stoichiometry, the balanced chemical equation gives the molar ratio of products and reactants required for the reaction...