How many grams of NH_3 will have the same number of molecules as 15.0 grams of C_6H_6? What is the number of molecules in 28.01 grams of CO? How many molecules are in 150.0 grams of C4H10O? What is the number of grams of Hydrogen in 5.45 times 10^{22} molecules NH_3?
is composed ofverysmallparticlescalledmolecules.各种物质,不论它是什么,都是由一些称为分子的很小的粒子构成的。 相关知识点: 试题来源: 解析 考查动词短语。句意:每一种物质,无论是什么,都是由非常小的粒子组成的。根据句意和所给词可知,这里应选composed,be composed of 表示"由…组成",为动词短语。故填...
Adenosine triphosphate (ATP) Synthase is a protein complex that is actively involved in the catalysis of the ATP from adenosine diphosphate (ADP), and the inorganic phosphate molecules (Pi). The reaction is thermodynamically favored during cellular respiration in t...
11The r.m.s. speed of the molecules of a gas at 295 K is decreased by 20 %.What is the new temperature of the gas? A A -84.4C B -37.2 C C 189℃D236℃ 相关知识点: 试题来源: 解析 Am 295 T =188.8 K =-84.4 C 反馈 收藏 ...
number (6.02214076 × 1023) is the number of molecules that constitutes the atomic weight of a molecule in grams (g). For example, water is two hydrogen atoms with a weight of 1 g each and one oxygen atom with a weight of 16 g, meaning that one mole of water molecules weighs 18 g...
百度试题 结果1 题目 5 The mass of 4 molecules of a substance is2.125*10^(-22)g What is the possible formul a of the substance? A CH4 B O2 C SO_2 D I2Your answer B 相关知识点: 试题来源: 解析 B 反馈 收藏
1.What type of attraction exists between PF3 molecules?a) H-bonds b) Dispersion c) Dipole-Dipole d) Ionic2.What is the shape of the CS2 molecule?a) Linear b) Tetrahedral c) Bent d) Trigonal Pyramidal3.What type of attraction exists between CS2 molecules?a) H-bonds b) Dispersion c)...
Molalityis the number ofmoles of solute per kilogram of solvent. It is important the mass of solvent is used and not the mass of the solution. Solutions labeled with molal concentration are denoted with a lower case m. A 1.0 m solution contains 1 mole of solute per kilogram of solvent....
How many valence electrons does each of these molecules or ions have? (a) H2Se; (b) PCl3 ; (c) ClO4 -; (d) OH-. How many valence electrons are there in BrF_3? What is the total number of valence electrons in a sulfite ion, SO_3^{...
3. What causes some molecules with the same number of electron domains to have different shapes? Would they cause the real bond angle to be larger or smaller? Why? 4. Which of the following elements should you expect to form an incomplete octe...