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3. CONCRETE AND CONCRETE STRUCTURES

3. CONCRETE AND CONCRETE STRUCTURES

3. CONCRETE AND CONCRETE STRUCTURES. Chapter 13 Concrete Construction. Hoover Dam. 3. CONCRETE AND CONCRETE STRUCTURES -OVERVIEW. 3.1 Constituents: Cement, aggregates, water and admixtures 3.1.1 Purpose and function of constituents

By emily
(275 views)

Early History of Chemistry

Early History of Chemistry

Early History of Chemistry. Courtesy: www.lab-initio.com. Greeks. 400 B.C. – Matter was composed of four fundamental substances: fire , earth , water, and air.

By newman
(631 views)

Atomic Theory 1

Atomic Theory 1

Atomic Theory 1. What Happens in Vegas stays in Vegas. Atomic Theory Theories in science are proposed to explain the evidence available at the time. As new evidence is discovered theories are adapted to explain new data . This is the nature of Science .

By kamala
(320 views)

Formulas, Equations, and Moles

Formulas, Equations, and Moles

Formulas, Equations, and Moles. Atomic and Molecular Mass. The atomic masses as tabulated in the periodic table are the averages of the naturally occurring isotopes. Mass of C = average of 12 C and 13 C = 0.9889 x 12 amu + 0.0111 x 13.0034 amu = 12.011 amu.

By darice
(390 views)

Chapter 16 and 17

Chapter 16 and 17

Chapter 16 and 17. Chemical Bonding and Chemical Reactions. Chemical Bonding. The force that holds two atoms together Unites atoms in a molecule Atoms bond so they will become more stable . Their outer rings will resemble the noble gases. Ionic Bonds. Ion

By rafer
(164 views)

Chapter 4:Aqueous Reactions and Solution Stoichiometry

Chapter 4:Aqueous Reactions and Solution Stoichiometry

Chapter 4:Aqueous Reactions and Solution Stoichiometry. 4.1 Aqueous Solutions. Electrolytes - ionic solutions that conduct a current. ZAP. Nonelectrolytes - molecular compounds (most covalent) Strong electrolytes - strong acids, strong bases, and salts

By lorant
(134 views)

Unit 10: Energy in Chemical Reactions

Unit 10: Energy in Chemical Reactions

Unit 10: Energy in Chemical Reactions. Cypress Creek High School Chemistry 1L Chapter 10. States of Matter. Some chemical equations indicate the state of matter of the substances Solid (s) - baking soda Liquid (l) - water Gas (g) - carbon dioxide

By trung
(398 views)

Enzymes

Enzymes

Enzymes. pp 35-37, 57. Reactions (rxn) Review. Energy: the ability to do work Requires energy to start the reaction (activation energy, E a ). Why do potatoes turn brown?. How Enzymes Work. E nd in – ase (i.e. synthase, polymerase, helicase) Reduces the activation energy ( E a )

By armand
(532 views)

The identity of the atom is determined by the # of protons in the nucleus.

The identity of the atom is determined by the # of protons in the nucleus.

The identity of the atom is determined by the # of protons in the nucleus. One can change one kind of atom into another by changing the number of protons in the nucleus These changes involve enormous amounts of energy. This is the source of nuclear energy and the atomic bomb.

By ballard
(374 views)

Modeling the Frog Cell Cycle

Modeling the Frog Cell Cycle

Modeling the Frog Cell Cycle. Nancy Griffeth. Goals of modeling. Knowledge representation Predictive understanding Different stimulation conditions Protein expression levels Manipulation of protein modules Site-specific inhibitors Mechanistic insights

By miya
(862 views)

Chemical Reactions

Chemical Reactions

Chemical Reactions. Unit 3 Enloe High School. Law of Conservation of Mass. During physical or chemical changes matter is neither created nor destroyed. Chemical reactions do involve the separation, combination, or rearrangement of atoms. Mass of products = mass of reactants

By abla
(159 views)

Charging VRLA Batteries

Charging VRLA Batteries

Charging VRLA Batteries. Jan 10, 2016. What’s So Special About VRLA?. It’s not just “A battery is a battery is a battery!” VRLA design is “different” than VLA design . VRLA is considered as “Starved Electrolyte” design. VRLA, by design, is a recombinant system.

By ipo
(116 views)

Kinetics/Equilibrium Game

Kinetics/Equilibrium Game

Kinetics/Equilibrium Game. Review. What happens to the reaction rate of many reactions when the temperature is increased by 10 o C?. Doubles.

By Mia_John
(158 views)

Biochemical Tests

Biochemical Tests

Biochemical Tests. Catalase production. Catalase is an enzyme that splits hydrogen peroxide into water and oxygen. Hydrogen peroxide is produced as a byproduct of respiration and is lethal if it accumulates in the cell.

By tybalt
(201 views)

Some elements of the periodic table

Some elements of the periodic table

Some elements of the periodic table. Co. history of discovery. 1735 Swedish mineralogist Georg Brandt. physical properties. hard metal exists in two versions melting point of 1494 ° C ferromagnetic material. chemical properties. 2Co + O 2 = 2CoO. Co + Br 2 = CoBr 2.

By orien
(325 views)

§4-1 碳族元素通性 C Si Ge Sn Pb ⅥA 族

§4-1 碳族元素通性 C Si Ge Sn Pb ⅥA 族

第十三章 碳族元素. §4-1 碳族元素通性 C Si Ge Sn Pb ⅥA 族. (在周期表中位置:第 Ⅳ A 族). 一、碳族元素. 相似性 递变性. 2s 2 2p 2. C. 1 、最外层都有 4 个电子,化合价主要有 +4 和 +2 ,易形成共价化合物。. 单质物性. 单质化性. EA1. + 4. + 2. 3s 2 3p 2. Si. 基本上逐渐减小. 熔沸点降低. 非金属性减弱、金属性增强. 最高价氧化物对应水化物的酸性减弱. 氢化物的稳定性减弱.

By leann
(202 views)

第 13 章 氢 希有气体

第 13 章 氢 希有气体

第 13 章 氢 希有气体. 教学要求. 1、掌握氢的物理和化学性质。 2、一般地了解希有气体的发展简史,单质的性质,用途和从空气中分离它们的方法。 3、了解希有气体化合物的性质和结构特点。. T. H. D. §13 - 1 氢. 1-1 氢的存在和物理性质. 1. 氢是宇宙中最丰富的元素。 绝大部分氢以化合态存在。 存在于水、石油、天然气以及生物的组织中。由光谱数据分析表明,太阳和其他一些星球的大气中含有大量的氢。. 存在. 氢的发现. 2. 氢的同位素- 3 种. 1 H—— 又称氕,符号为 H ,占 99.98%

By jed
(181 views)

第五章 氢和稀有气体

第五章 氢和稀有气体

第五章 氢和稀有气体. § 5-1 氢. 一、氢在自然界中的分布 三种同位素: 1 1 H ; 1 2 H ; 1 3 H. 二、氢的成键特征 1 、离子键; 2 、共价键; 3 、独特的键形. (3) 与 CO 的反应 CO + 2H 2 → CH 3 OH. Cu/ZnO. 三、氢的性质和用途. 1、 单质氢. (1) 与卤素或氧的反应 2H 2 + O 2 → 2H 2 O. (2) 与金属氧化物或金属卤化物的反应 WO 3 + 3H 2 → W + 3H 2 O. 2、 原子氢

By sancha
(117 views)

第 14 章 卤 素

第 14 章 卤 素

第 14 章 卤 素. §14-1 卤素的通性. §14-2 卤素单质. §14-3 氟氯溴碘的化合物. Br 2. Cl 2. I 2. 卤 素 The Halogens. 拉丁文原义 ⅦA ns 2 np 5 “ 萤石” ← 9 F 2s 2 2p 5 “ 绿色” ← 17 Cl 3s 2 3p 5 “ 臭” ← 35 Br 4s 2 4p 5

By nelia
(238 views)

第三章 酶( enzyme)

第三章 酶( enzyme)

第三章 酶( enzyme). 主要介绍酶的化学本质、结构和特性;酶的作用动力学;酶的作用机理;酶的应用;还介绍了别构酶、共价调节酶、同工酶等的概念、性质、生物学意义。. 主讲老师:华南师范大学生命科学学院      陈文利. ★ Study history, ★ General features, ★ Classification, ★ Chemical nature, ★ Kinetics ★ Mechanism, ★ Regulation. 酶通论.

By vanig
(197 views)

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