Spin quantum number ‘ms’ is related to spin of the electron that can be either clockwise or anticlockwise. Its value is +1/2 or -1/2 (Quantum Numbers and Electron Configurations, 2014).
Aufbau is a German word that means
For weak intermolecular forces, as in toluene and Xylene mixture remains constant, i.e. equal to the viscosity of the individual liquids.
Viscosity is inversely proportional to the intermolecular forces in a solution. Viscosity of water is
Hire a pro to write a paper under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Therefore, the next step would be to analyze some of the chemical properties of styrene. Polystyrene is brittle, less viscous and leaves a dry film. These properties allow us to conclude that polystyrene is formed.
The mixture becomes thicker (viscous) while
e radioactive tracer is absorbed by the muscle of the heart in proportional direction to blood flow, then to the muscle area, during rest and in the post stress. The variation in myocardial absorption of technetium after and before stress identifies heart muscle areas that are
Most of these drugs are antibiotics and they act by inhibiting folic acid biosynthesis. The general structure of sulfa drugs is as indicated in the graphic below.
The use of the drug is based on the concept of metabolic antagonism. Sulfa drugs
Many seafood including fish, seaweed, and shellfish are very rich in iodine. Other products that contain iodine include dairy products derived from milk and milk. Other consumer products that contain iodine
One needs to prepare the TLC plate first before testing for polarity of the solvents.
The thin Layer Chromatography (TLC) largely helps to determine the purity of compounds. This technique also becomes helpful in identifying the contents of a mixture. TLC separates
Contamination of soil and water by acrylamide released from poly-acrylamide degradation from hydraulic fracturing as friction agent is seen to be a major concern. In this case, carbon stable isotope ratios will be used in
By measuring how the temperature changes when H2O2 and a catalyst are mixed, it is possible to determine the enthalpy of decomposition H2O2. This experiment will determine the enthalpy of decomposition of H2O2 when it is mixed with potassium
the effects of the nature of the leaving group, the size of the nucleophile as well as the polarity of the solvent on the rate of SN1 and SN2 reactions. Primary, secondary and tertiary alkyl bromides were reacted with NaI in presence of acetone and ethanol solvents to determine
and vinegar was placed under burette. NaOH from the burette was slowly added to the flask, as the flask was being swirled until the solution in the flask was a faint permanent pink. The final volume for NaOH was recorded on the data sheet.
At equivalence point, enough base
d). This reactive property of chemicals is employed in a wide range of industries such as food production, material production, pharmaceutical, and others. Conventionally, many such industries do not always categorize the unique behaviour of
cottish researcher at the Rowett Research Institute located in Aberdeen, the processes of altering the genetics of food causes damage to a mammal’s digestive and immune systems. In his studies, the researcher discovered that when rats were fed with transgenic potatoes they
Although the water component is normally at low concentrations (< 0.2%) and can easily be vaporized, free water is a major contaminant that can potentially cause serious damage to jet engines (Taylor, 2008, p.2401). The icing on the critical components of the jet fuel system is particularly attributed to the fact that solubility normally decreases with decreasing temperatures.
Sub-acute exposure entails frequent exposure that might last for a period of a single month whilst sub-chronic exposure entails for a period that ranges from one month to corresponding three months (Noll et al, 2014). These exposure limits are normally applicable to the
Since there are a total of 28 electrons, half of them has a value of -½ and half of them has a value of +½. Therefore there are 14 electrons having a value of +½ ms
A5 For each of the following molecules, give the hybridization of the central atom
For instance, shadows are grey in their real context but appear greenish blue to the eyes. The difference in appearance is as a result of the fact that the eyes try to counter the strong orange-red light from the sun. A cone exposed to two opposite
However, to fully comprehend how the cleaning up process of oil spill works, it is necessary to understand the chemistry behind mitigation of oil spills.
There are several ways in controlling and cleaning up oil spills. These methods are usually combinations of
However, photon that is incident is of much greater energy than the quantum energy in the vibrational mode. This loses its energy to the molecular vibration with the remaining energy being scattered as a photon with reduced a
to galvanize metals and to make batteries/ before it was recognized as a separate element, it was used to make brass by ancient civilizations/ it is hard, brittle, a fair conductor of electricity and a moderately reactive element
It is used to plate steel, to make tin cans and
The requirement for large amounts of pure compound is because of the relatively low sensitivity of NMR and the lack of a compound separation system in analysis of NMR.
The Purpose of this paper will be to
The aim of this research was to advocate bio-oils reformation through the current used in the Ni-CNTs catalyst’s high-dispersion. This indicated that bio-oils reformation is helpful in increasing hydrogen’s yield by the reformation of bio-oils organic compounds at low temperature. The authors used H2-TPD, XRD, TEM, XPS, ICP/AES.
These countries are France, Japan, and the United States. This is despite the fact that there are 439 nuclear reactors for power generation scattered across 31 countries. Statistics have shown that this
atoms and amount of light absorbed, therefore, we can determine the concentration of the sample by measuring the amount of light absorbed (Karabegov, 2011).
Samples have to be heated to extremely high temperatures in other to atomise them. The sample goes through a nebulizer
However, Claus Process is not a pure gas purification process (Kohl, 1997). It applies vital technology in the gas refinement process, owing to the measures it applies to avoid air pollution, through the use of a tail
A standard curve is obtainable by making solutions with known concentrations of the substance under investigation then measuring their absorbance. The known concentration is plotted on the y-axis against absorbance on the
Interesterification is reactions in which fatty acid compound esterified to a glycerol backbone is reacted with fatty acids, alcohols or esters. When applied to oils and fats, it is a reaction between different triglycerides with rearrangements of the acryl groups within
There are several routes to the extraction of zirconium oxide: chlorination, alkali decomposition, lime fusion and precipitation of the acidic reagents. Zirconium oxide has a very high resistance to heat, so it's ideal to be used as a refractory insulating material, industrial manufacture of crucibles and production of alkaline zirconate.
Other properties include having excellent biocompatibility and functionalization. This has made it easy for researchers to use it physical, chemical and biomedical fields. Its capacity to absorb aromatic biomolecules through static interaction and electrostatic
e polarity of the solutions relative to the stationary phase caused the observed differences among the chromatograms obtained using the different solvents. On the other hand, the relative polarity of the dyes resulted to differences in their interactions with the phases, and
From the knowledge of how the elements combine, we can then be able to explain specific characteristics that are observed in different substances all around us. Deeper understanding can even assist in the
The gas is needed pure and so, the liquid sample acts as impurities commonly referred to as ghost peaks.
5. Thermal conductivity detectors work by sensing the changes in thermal conductivity of the column
ich falls within the theoretical range of 0.35 – 0.67 depending on the class of pine (which in this case is near the value of kind radiata at 0.48). Similarly, the experimental density of oak which is 0.75 g/ml is well within 0.6 – 0.9 and closest to the true values 0.74,
Most of the aldehydes feature a pleasant odour. Principally, they are derived from alcohols through dehydrogenation (the process of removal of hydrogen). It is this process that the name aldehyde originated. The
In general, antibiotics are natural substances discharged by fungi and bacteria into their surroundings, as a means of restraining other organisms. This paper will discuss the history of penicillin from its discovery, development and
Even though the discovery or isolation of Aspirin took place in 1897 through a German chemist; Felix Hoffmann, many scientists worked behind the curtain from 1826 onwards to identify a pain relieving drug.
In 1828, Johann Buchner, professor of