though we recognize that energy is not a physical substance‚ we choose to use the substance metaphor to describe it. We’ll use three principles to guide us in the development of the energy concept. 1. Energy can be viewed as a substance-like quantity that can be stored in a physical system. 2. Energy can “flow” or be “transferred” from one system to another and so cause changes. 3. Energy maintains its identity after being transferred. If you are unsure what we mean by the use of a substance
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Chemistry 12 Unit 1 - Reaction Kinetics Chemistry 12 Worksheet 1-3 - Reaction Mechanisms 1. It is known that compounds called chlorofluorocarbons (C.F.C.s) (eg. CFCl3) will break up in the presence of ultraviolet radiation‚ such as found in the upper atmosphere‚ forming single chlorine atoms: CFCl3 CFCl2 + Cl The Cl atoms then react with Ozone (O3) as outlined in the following mechanism. Step 1: Step 2: Cl + O3 ClO + O2 ClO + O Cl + O2 (single "O" atoms occur naturally in the atmosphere
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According to Bowlby‚ (1975)‚ attachment bonds allow children to adapt and adjust to new situations and people. (Cited in Shumeli-Goetz‚ 2015) and that attachment bonds remain important and exert influence throughout the life cycle. (Shumeli-Goetz‚ 2015). Not only does attachment create secure bonds it also contributes to children’s development‚ including their self-esteem and social experiences‚ which in turn contribute
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Testing the Reactivity of Metals Aim: To prove the arrangements of the metals (Na‚ Ca‚ Mg‚ Al‚ Zn‚ Fe‚ Sn‚ Pb‚ Cu) according to the reactivity series. Background Information: By using various experiment‚ the reactivity of the metals can be deduced by the observation of the reaction. Hypothesis: Metals with low ionisation energy will lose their their electron more easily providing a more vicious and obvious result‚ as compared to the metals with higher ionisation energy‚ as the metals with lower
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and __________ unpaired electrons. A) 4‚ 2 B) 0‚ 5 C) 2‚ 5 D) 6‚ 1 E) 4‚1 2. Which of the following would have to gain two electrons in order to achieve a noble gas electron configuration? O Sr Na Se Br A) Sr B) Br C) Sr‚ O‚ Se D) Na E) O‚ Se 3. The electron configuration of the S2- ion is __________. A) [Ne]3s23p2 B) [Ne]3s23p6 C) [Kr]3s22p-6 D) [Ar]3s23p2 E) [Ar]3s23p6 4. The ion NO- has __________ valence electrons. A) 10 B) 16 C) 12 D) 14 E) 15 5. The Lewis
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Bond Case Sam Strother and Shawna Tibbs are vice presidents of Mutual of Seattle Insurance Company and co-directors of the company’s pension fund management division. An important new client‚ The North-Western Municipal Alliance‚ has requested that Mutual of Seattle present an investment seminar to the mayors of the represented cities‚ and Strother and Tibbs‚ who will make the actual presentation‚ have asked you to help them by answering the following questions. What are the key features of a
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Introduction A lot has been written about Ruskin Bond‚ our very own Indian writer‚ whose writing s span over 50 years. His versatile‚ original and elegant style of writing has made him a favourite to readers around the world. Despite Bond’s British background‚ he writes about India as an insider’s perspective. Having lived the majority of his life in India‚ he knows the country well and writes an authenticity and emotional engagement about the land and the people of the Himalayas and small-town India
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Chemistry Review (mid-term) 1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf) 1. Argon has three naturally occurring isotopes: argon-36‚ argon-38‚ and argon-40. Based on argon’sreported atomic mass‚ which isotope do you think is the most abundant in nature? Explain. 2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu.
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Experimental Chemistry In this topic‚ you will learn: www.revision-notes.co.cc Hazard Warning Labels www.revision-notes.co.cc Measurement: Mass‚ Volume‚ Time and Temperature www.revision-notes.co.cc www.revision-notes.co.cc Collection of Gases www.revision-notes.co.cc Identification of Gases www.revision-notes.co.cc The Particulate Nature of Matter In this topic‚ you will learn: www.revision-notes.co.cc States of Matter Kinetic Theory www.revision-notes
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functional groups. 5 major functional groups easily identified by IR spectroscopy: 1. C=O 2. C–O 3. OH 4. Phenols 5. C–H Instrument details Type of spectrophotometer: Nicolet 380 FT-IR spectroscopy‚ Nicolet Avatar 360 & Thermo Scientific iS10 FT-IR Spectrometer Type of radiation source: Methods of Sample Preperation Initially the plates were rinsed with ethanol‚ then dried with lint0free tissues. Next 1-2 g of benzoic acid were transferred to a mortar and a pestle was then use to
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