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Over 200+ Lynda courses

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Chemistry

Alkanes: Kinetics and Rate

Most reactions require the addition of energy. Energy is needed for molecules to pass over the energy barriers that separate them from becoming reaction products. These energy barriers are called the activation energy, or enthalpy of activation, of the reactions. At room temperature, most molecules have insufficient kinetic energy to overcome the activation energy barrier so a […]

Chemistry

Alkanes: Halogenation

The reaction of a halogen with an alkane in the presence of ultraviolet (UV) light or heat leads to the formation of a haloalkane (alkyl halide). An example is the chlorination of methane. Experiments have shown that when the alkane and halogen reactants are not exposed to UV light or heat, the reaction does not occur. However, […]

Chemistry

Molecular and Structural Formulas of ALKANES

The alkanes comprise a series of compounds that are composed of carbon and hydrogen atoms with single covalent bonds. This group of compounds comprises a homologous series with a general molecular formula of C n H 2 n+2 , where equals any integer. The simplest alkane, methane, has one carbon atom and a molecular formula of CH 4. Because this compound […]

Chemistry Petroleum engineering Questions Science/Engineering

Organic chemistry questions

These questions will help you get acquainted to petroleum chemistry Hydrocarbons (01) Draw an example of each of the four types of hydrocarbons: alkane, alkene, alkyne, and aromatic. (02) Answer True or False for the following statements. Organic molecules occur only in nature and cannot be artificially synthesized Medicines we consume are not derived from…...

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MS Excel

Excel Data Validation, Filters, Grouping

In this tutorial, we are going to cover the following topics. Data validation Data filters Group and Ungroup Adding images to spreadsheets Data validation Data validation is very important in the sense that it helps us avoid mistakes that can be avoided. Let’s assume you are recording student exam marks and you know the minimum […]