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Introduction to Inorganic Compounds CORE 1 Identify and draw the structures of methane, ethane, ethene and ethanol.2 State the type of compound present, given a chemical name ending in -ane, -ene and -ol, or a molecular structure. SUPPLEMENTARY 3 Describe the concept of homologous series of alkanes and alkenes as families of compounds with similar…

IB Chemistry: Rates of Reaction Rates of Reaction Define the term rate of reaction. This is essentially a reaction: Reactants →Product As a reaction occurs, the “concentration” of a reactant decreases as it forms the product, so the concentration of the products increases. So we can define ‘rate of reaction’ as either: Decrease in concentration…

Second derivative test. Worked example Let’s do an example. Let’s say we look at the function f (x, y) = x + y + 1/xy where x and y are positive. We are looking at this function because we do not want the denominator to be 0, so we are just looking at that situation….

Venn Diagrams A Venn diagram is a type of diagram used in mathematics, logic, linguistics and many other fields. It is named after John Venn, who pioneered the use of such diagrams for logic in his 1881 book Symbolic Logic. The Venn diagram consists of two or more overlapping circles (or ellipses). The set of…

Introduction to the Market and Marketing 4.1 The Role of Marketing – Introduction Lets begin with a minor IGCSE Re-cap A business provides either a good or a service: A ‘Good’ is a physical product manufactured and designed by the business A ‘Service’ is a product offered in various forms, this can be: expertise, information,…

Perimeter and Area of Composite Figures The figure to the right is a composite figure. How would you define a composite figure? A composite figure consists of two or more basic shapes or figures. Example 1: a) How would you calculate the area of this figure? The diameter of the circle is 50 cm. The…

CFA Level 2 – Equity, Session 10 – Reading 34, A Note on Asset Valuation – LOS a (Practice Questions, Sample Questions) 1. Although we often take modern security analysis for granted, the basic concept that a firm’s value could be determined by analyzing its income statement and balance sheet was not seriously advanced until the 1930s,…

IGCSE History: Germany – Reorganization of the Nazi Party 1924-8 Reorganization tactics 1925: relaunches Nazi Party Offices set up in major cities Became more than just a local party Secretary and treasurer appointed Party divided into regions Improved finances by befriending wealthy businessmen They hated communism, as they would take over businesses Hoped Hitler would…

Are the Points in the Plane? So the general idea is that either they are on opposite sides, or one of them might beon the plane. Let’s try to see if one of them is in the plane. So if we take the point Q0, which is at (minus 1, 2, 2), and plug that…

Mathematics: Gradient of Parallel and Perpendicular Lines “Parallel lines have the same gradient” Remember the form y=ax+b, where “a” is the gradient? The gradient here is the same; it’s just the value of “b”, the y intercept that is different. The rule to learn here is that for two functions y=ax+b and y1 = a1x1…