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Chemistry

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balancing chem equations

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Chemistry
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Balancing Chemical Equations Worksheet 1. _____ H2 + _____ O2 ? _____ H2O 2. _____ N2 +_____ H2 ?_____ NH3 3. _____ S8 + _____ O2 ? _____ SO3 4. _____ N2 + _____ O2 ? _____ N2O 5. _____ HgO ? _____ Hg + _____ O2 6. _____ CO2 + _____ H2O ? _____ C6H12O6 + _____ O2 7. _____ Zn + _____ HCl ? _____ ZnCl2 + _____ H2 8. _____ SiCl4 + _____ H2O ? _____ H4SiO4 + _____ HCl 9. _____ Na + _____ H2O ? _____ NaOH + _____ H2 10. _____ H3PO4 ? _____ H4P2O7 + _____ H2O 11. _____ C10H16 + _____ Cl2 ? _____ C + _____ HCl 12. _____ CO2 + _____ NH3 ? _____ OC(NH2)2 + _____ H2O 13. _____ Si2H3 + _____ O2 ? _____ SiO2 + _____ H2O3 14. _____ Al(OH)3 + _____ H2SO4 ? _____ Al2(SO4)3 + _____ H2O

chemestry all in all

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Chemistry Resume 1. Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties.[1][2] Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds. Chemistry is sometimes called "the central science" because it connects physics with other natural sciences such as geology and biology.[3][4] Chemistry is a branch of physical science but distinct from physics.[5] The etymology of the word chemistry has been much disputed.[6] The genesis of chemistry can be traced to certain practices, known as alchemy, which had been practiced for several millennia in various parts of the world, particularly the Middle East.[7] Contents ?[show]? 1 Theory 2 History

radio active decay

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Chemistry
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Radioactive decay From Wikipedia, the free encyclopedia ??(Redirected from Radioactivity) Jump to: navigation, search ? For particle decay in a more general context, see Particle decay. For more information on hazards of various kinds of radiation from decay, see Ionizing radiation. "Radioactive" redirects here. For other uses, see Radioactive (disambiguation). This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (April 2010)

Isomer

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Chemistry
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1 Lecture 6 Structural Isomers ? Just how many structures can you make from a simple formula? 1. methane: CH4 C H H H H CH4 C H H H H condensed formula 2D formula 3D formula methane 2. ethane: C2H6 Once the two carbons are connected, there are only six additional bonding sites and these are filled by the six hydrogen atoms. Ethane is a saturated molecule. C2H6 is completely unambiguous. C2H6 C H C H H condensed formula 2D formula 3D formula H H H CC H H H H H H You can twist about this single bond generating different conformations. Build a model and try it. condensed line formula CH3CH3 ethane The carbon-carbon single bond allows rotation of one group of three C-H sigma bonds past the other

Combustion

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Chemistry
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ANSWERS: Crystal Ball questions on Combustion QUESTION: Write balanced equations for the complete and incomplete complete combustion of the following molecules organic molecule equation for complete combustion equation for incomplete combustion octane 2C8H18(g) + 25O2(g) ? 16CO2(g) + 18H2O(g) 2C8H18(g) + 13O2(g) ? 8CO(g) + 8C(s) + 18H2O(g) there are other possibilities by changing moles of CO and C propene 2C3H6(g) + 9O2(g) ? 6CO2(g) + 6H2O(g) 2C3H6(g) + 5O2(g) ? 4CO(g) + 2C(s) + 6H2O(g) there are other possibilities by changing moles of CO and C ethane 2C2H6(g) + 7O2(g) ? 4CO2(g) + 6H2O(g) C2H6(g) + 2O2(g) ? CO(g) + C(s) + 3H2O(g) there are other possibilities by changing moles of CO and C heptane

Matter-chemistry

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Chemistry
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Classification of Matter Exercise In each of the following sets, which one doesn't belong? 1 2 3 iron water sodium carbon dioxide oxygen water oxygen air ammonia platinum glucose methane 4 5 6 7-Up glycerine nickel air glucose oxygen soup carbon dioxide titanium stainless steel sodium chloride tungsten
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Conversion factors

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Chemistry
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CONVERSION FACTOR PROBLEMS Conversion factors can be used to convert units or to convert between equivalent ways of expressing a quantity. The quantity in the problem is multiplied by one or more ?conversion factors,? in which the numerator is equal to the denominator. Since the numerator and denominator of the conversion factor are equal, multiplying by the conversion factor is like multiplying by 1 and thus does not change the value of the original quantity. Use the table of English to Metric equivalents as needed. All answers should be in significant figures! A) Problems with a single conversion factor. 1. How many cm are in 18.9 inches? 2. How many grams are in 0.143 ounces? B) Problems with two or more conversion factors.

Case study

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Chemistry
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ANTIBIOTIC OVERDOSE CASE-STUDY QUESTIONS The unit for the baby?s temperature is not given in the article. Which unit do you think it is? Pneumonia is characterized by fever (a body temperature above 37.2 degrees C. Does the patient have a body temperature that indicates that he has pneumonia? Justify your answer with suitable calculations. What was the baby?s weight in kg?

Alkane

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Chemistry
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Hydrocarbons Organic structures that contain only carbon and hydrogen Saturated ? a compound is termed ?saturated? if it has the maximum hybridization (sp3) at each carbon Therefore: no double or triple bonds A saturated carbon species is termed an ALKANE The compound has a root name indicating the number of carbons and the ?ane suffix CH3-CH3 ethane An ALKENE has a carbon-carbon double bond All three structures represent ethylene (or ethene) An ALKYNE has a carbon-carbon triple bond All three structures represent acetylene (or ethyne) Straight Chain Alkanes The alkanes are named according to the number of carbon atoms in the chain Ends with an ?ane suffix Root name

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