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Compound Naming and Molecular and Empirical Formulas

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Compound Naming Ionic: ends in ?ide NaCl -binary compound (two element) - a ratioempirical formula - sodium chlorineide Metals: use roman numbers to indicate charge What happens when you are naming metals? -Metals can take on a number of charges, and thus don?t have a set charge. For example: Cr+3Cl3- and Cr+2Cl2 both would be called ?chromium chloride? if we use the above rule. Thus, we resort to using roman numerals to denote charge. Cr+2Cl2 is now known as chromium III chloride Cr+3Cl3- is now known as chromium II chloride. Molecular: denote subscripts make sure the molecule doesn?t consist of ionic or metallic bonds CO carbon MONoxide CO2 carbon DIoxide P2S5 DIphosphorus PENTsulfide NOTE: put cations (positive) first Emperical Formula: reduce the numbers C1H2O1=CH2O

Compound Naming and Molecular and Empirical Formulas

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Compound Naming Ionic: ends in ?ide NaCl -binary compound (two element) - a ratioempirical formula - sodium chlorineide Metals: use roman numbers to indicate charge What happens when you are naming metals? -Metals can take on a number of charges, and thus don?t have a set charge. For example: Cr+3Cl3- and Cr+2Cl2 both would be called ?chromium chloride? if we use the above rule. Thus, we resort to using roman numerals to denote charge. Cr+2Cl2 is now known as chromium III chloride Cr+3Cl3- is now known as chromium II chloride. Molecular: denote subscripts make sure the molecule doesn?t consist of ionic or metallic bonds CO carbon MONoxide CO2 carbon DIoxide P2S5 DIphosphorus PENTsulfide NOTE: put cations (positive) first Emperical Formula: reduce the numbers C1H2O1=CH2O

history of algebra

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The history of algebra began in ancient Egypt and Babylon, where people learned to solve linear (ax = b) and quadratic (ax2 + bx = c) equations, as well as indeterminate equations such as x2 + y2 = z2, whereby several unknowns are involved. The ancient Babylonians solved arbitrary quadratic equations by essentially the same procedures taught today. They also could solve some indeterminate equations.

ap human summarys

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Industrialization and Economic Development Key Terms BY: R.J Smith 7th period Development is the improvement in material conditions of a place as a result of diffusion of technology and knowledge. This is important because it is a main goal for most of the planet’s regions and development will help solve many problems. More Developed Country Less Developed Country North-South Split MDCs are found primarily in the Northern Hemisphere north of 30˚ latitude, whereas LDCs are found in south of this line Human Development Index Indicator of level of development for each country, constructed by the United Nations, combining income, education, literacy, and life expectancy Gross Domestic Product

China's Drive for "Indiginous Innovation": A web of Industrial Policies

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By James McGregor Senior Counselor APCO Worldwide China?s Drive for ?Indigenous Innovation? A Web of Industrial Policies 1 Table of Contents Overview and Executive Summary???????????????..?...??3 China?s indigenous innovation campaign is supported by an intricate web of industrial policies that are shaped by the country?s tempestuous history with the West and reflect a deep-seated desire to be self-sufficient. Playing Science and Technology Catch-up ??????????????????8 China has made great strides in scientific development since 1949, but the road has not always been smooth. The Elixir of ?Scientific Development? ???????????????????9 The Hu-Wen Administration heralds science as the way forward but faces serious hurdles.

Genetically Modified Foods

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One of the most argued reasons in favor of GM foods is that without them the world will not be able to feed its growing population. It has been estimated that almost a billion people are going hungry since 2008. The fact is, the world produces enough food for each person to consume 3,000 calories every day. This doesn’t include the food that goes toward feeding livestock, producing ethanol, and other necessities to provide for human needs. Many people would argue that the large food supply is because GM food crops have been successful in increasing the average yields. The opposite was found in the 2008 report from the United Nations International Assessment of Agricultural Knowledge, Science and Technology for Development (IAASTD).

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