Chemistry * a science that dealing with the structure‚ composition and properties of items and with the transformations that they undergo * the composition and chemical properties of a substance * chemical processes and phenomena (as of an organism) Examples: - Digestion; enzymes promoting chemical reactions that power our bodies. Lifting your arm requires your body to make and burn ATP using oxygen with carbon dioxide as one of the waste gases produced. - The internal combustion
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Say No To Plastic Bags Plastic is a material that we can see everyday everywhere in our life‚ people all over the world are using plastic bags to carry something or other things and. Plastic bags are extremely dangerous for environment ‚ it is one of the main problem why environment in the world is becoming worst . Plastic bags are non-biodegradable ‚ it means that plastic bags cannot be turned into any other substance that benefiting environment . Even though plastics are being burned ‚ it will
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Caused By Plastic Bags Written by: Erica Duncan Science 256 Professor Elizabeth Stevens Pollution Caused By Plastic Bags Plastic bags are one among many items that do not decay or professional terms non-degradable. Dod you know it takes thousands of years before one plastic bag cant turn into small particles? Yew‚ that is a long time for plastic bags to vanish from earth. Many people don’t understand how seriously something as simple as plastic bags affect us‚ earth
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law theory 3. Exercise 1.5 Part A - Define chemistry. ANSWER: Chemistry is the science that seeks to understand what matter does by studying what atoms and molecules do. Chemistry is the science of matter and its motion‚ as well as space and time - the science that deals with concepts such as force‚ energy‚ mass‚ and charge. Chemistry is the science that studies the molecular transformations only in nonliving matter. Chemistry is the science that studies the molecular transformations
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rehend. The second stanza is slightly optimistic‚ along with a continuation of the wide array of examples. She states that‚ “The will to do whatever must be done‚” and that is where the reader is allowed to conclude how the author feels. No matter the fairy-tale‚ the character is asked to do a mind-blowing task and somehow manages to summon the strength and courage to do it. A Person‚ A Paper‚ A Promise By Dr. Earl Reum Once on a yellow piece of paper with green lines he wrote a poem
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www.ccsenet.org/ijc International Journal of Chemistry Vol. 2‚ No. 2; August 2010 One-pot Preparation of β–amino Carbonyl Compounds by Mannich Reaction Using MgO/ZrO2 as Effective and Reusable Catalyst Deepak.M. Nagrik (Corresponding author) Department of Chemistry‚ PLIT and MS Buldana-443001‚ M.S.‚ India E-mail: dmnagrik@rediffmail.com D.M.Ambhore P.G.Department of Chemistry‚ Jijamata Mahavidyalaya Buldana-443001‚ M.S.‚ India Manoj.B. Gawande (Corresponding author) Departamento de Química
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BMBT 416 1 CY 101: Electrochemistry 2 Submarines can propagate on the sea surface just like a ship Unless it’s a nuclear submarine; just like a ship‚ submarine’s propulsion is supplied by a diesel engine The sub intakes oxygen from air to run its diesel engine. But in order to strike an enemy ship‚ it has to take plunge in deep sea and remain submerged for a period between 24 to 48 hours! How the submarine is powered when it is under the sea?? 3 How people power their
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brown paper bag which the 40-year-old housewife held at the bottom‚ all 10 ¬¬¬¬¬¬-fingers at full stretch. But one side of the bag ruptured‚ too weak to hold even its meagre content. Aling Saling coddled her torn paper bag like a baby to keep what was left of her precious rice from spilling onto the wet pavement. She was torn: should she kneel and pick up her rice one grain at a time or take refuge from the rain and protect what was left? She walked on‚ her shoulders hunched over her bag. Her experience
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Unit 1 – Lesson 1 Chemistry Key Questions 1. Element Standard Notation # Of Electrons # Of Protons # Of Neutrons Sodium 23 11 Na 11 11 12 Chromium 24 Ca 26 26 27 ? Phosphorus 32 P 15 15 16 2. Fireworks; Which metals burn to produce these colours? Red – Lithium (Sr) Blue – Cesium (Cs) Pink – Potassium (K) Yellow/Green – Copper (Cu) Orange – Carbon (Ca) 3. Let’s say that the three bottles contain Fe(NO3)3‚ BaCl‚ and AgNO3. These are Iron (III) Nitrate‚ Barium Chloride
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CHEMISTRY Guess Paper – 2013 Class – XI Subject - CHEMISTRY MAX MARKS=90 ……………………………………………………………………………………… General instructions: All questions are compulsory. Marks for each question are indicated against it. Questions number 1to 8 are very short –answer questions‚ carrying 1 mark each. Answer these in one word or about one sentence each. Questions number 9 to18 are short –answer questions‚ carrying 2 marks each. Answer these in about 30 words each. Questions number19 to27
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