short-term source of energy, and they are used in making cell structures. Carbohydrates are made up of monomers(which are comprised of single molecules) called monosaccharides. Monosaccharides include glucose, sucrose, and galactose. Two monosaccharides can be combined by removing a hydrogen end from one monomer and an oxygen/hydrogen end from another(forming a water molecule), and they can be combined using a bond called a glycosidic bond. These are called disaccharides, and can include carbohydrates like
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and problems, and show all work. 1. How many atoms are there in 5.10 moles of sulfur (S)? (6 points) 1 mole= 6.02 x 1023atoms 5.10 = (Reference: Chang 3.13) 2. How many moles of calcium (Ca) atoms are there in 77.4 g of Ca? (6 points) No of moles = mass of compound/ molar mass of compound (Reference: Chang 3.15 3. What is the mass in grams of 1.00 × 1012 lead (Pb) atoms? (8 points) Mass in grams = no of atoms x molar mass of compound / Avogadro’s number (Reference:
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Development of Elements: a. Matter is one basic substance i. Thales – water basic element, found as gas, solid and liquid ii. Animaxander – all matter is from one “boundless thing”, determined by the qualities hot/cold, dry/wet iii. Anaximenes – Air is the one basic substance iv. Empedocles – Earth, water, fire, air b. Wood reveals composition of matter when it burns – matter is a combination of two or more elements – fire issues
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Biology 160 Lecture 1 Introduction, Chemistry and Molecules Introductory Concepts for Studying Biology & Science • Chapter 1 What is science? • Knowledge gained through careful observation, experimentation and reasoning. • Science is: – Explanatory – Testable – Reproducible – Predictive – Tentative Questions of Science Scientific discoveries create complex questions: – Ex. Atom – Should scientists be free to pursue any research? • Cloning/Stem cell. – Should government control
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of atoms and/or molecules in a mole of any specific substance. For example, a mole of hydrogen atoms is 6.02x1023 hydrogen atoms. Yet, it's more universally understood to write ‘Mole’ rather than 6.02x1023 . It’s commonly asked as to why the term ‘Mole’ was created when terms like grams and kilograms etc already exist. This is because Moles make it easier to convert between atoms, molecules and grams. The empirical formula is defined as a formula which tells the reader the ratio of elements that’s
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Application of Spectroscopy Astronomical Spectroscopy Energy from celestial objects is used to analyze their chemical composition, density, pressure, temperature, magnetic fields, velocity, and other characteristics. There are many energy types (spectroscopies) that may be used in astronomical spectroscopy. Atomic Absorption Spectroscopy Energy absorbed by the sample is used to assess its characteristics. Sometimes absorbed energy causes light to be released from the sample, which may be
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Bio 101 Review Sheet Test #1 (Chapters 1-3) Chapter 1 1. Cell is basic unit of life 2. Hierarchy of life figure 3. 3 Energy categories and examples of each Producer-plants and some microbes Consumer-humans and other animals Decomposer-fungi and other animals 4. Energy transfers are not 100% efficient – why? Cant capture all of the energy supplied by one source a. Where does all energy for biology come from? sun 5. Homeostasis- state of internal consistency or equilibrium
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completes the statement or answers the question. ____b 1. The space surrounding the nucleus of an atom contains |a. |protons. |c. |neutrons. | |b. |electrons. |d. |ions. | ____c 2. If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number would be |a.
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INSTRUMENTATION BY MUHAMMAD ABDUL WAHAB ROL#428 Msc 2 SUBMITTED TO Dr.S.Mustansar Abbas IR SPECTROSCOPY It is the method or process to getting information about atoms and molecule by using electromagnetic radiation. OR The method of “seeing the unseenable”atoms and molecule. The field of spectroscopy related with internal structure of atom or molecule.There are different types of radiation but we use here IR RADIATION to analyte vibration change in electrons by IR Spectrum. INFRARED
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1. Atoms are a small unit of matter that retains the properties of an element. Atoms consist of positive protons and neutral neutrons which make a nucleus, and negatively charged electrons which orbits around the nucleus in a clouds. Protons Neutrons Electrons Charge Positive Neutral negative Location in atom Nucleus Nucleus Cloud/shell Size Same as neutrons smaller than electrons About the same as a proton Smaller than both protons and neutrons Function They determine the element Stabilize
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