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write my assignment 5269

The molecular structure of WCl6   is octahedral (Oh) , but WH6 is trigonal prismatic (D3h) .   

 a) Derive the irreducible representations that are spanned by the six σ bond vectors of  WH6 . 

b/  What 5d, 6s and 6p orbitals of W have the proper  irreducible representations to have the potential for use in forming σ bonds in WCl6 (Oh) and WH6  (D3h) ?

c/ Describe whether or not it is possible to distinguish an octahedral structure from a trigonal prismatic geometry using only the number of observed infrared WX6  stretching vibrational modes .

d/ Construct a schematic molecular orbital diagram for WH6 using the tungsten 5d , 6s and 6p and the hydrogen 1s orbitals as the valence orbitals and place the proper number of valence electrons into the molecular orbitals.

 

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write my assignment 13349

Hi, need to submit a 250 words essay on the topic Smoldering Combustion.

For instance, a cigarette produces char due to the chemical contents, but the combustion is influenced by physical factors. This implies that the physical elements spur the chemical reactions through the oxidation process that attack the cigarette contents.

The article also tackles the post-initiation features of smoldering. This comprises of various smoldering models, such as one and two-dimensional smolder models. However, oxygen controls the entire combustion process and this depends on the rate and degree of the reaction. One-dimensional smolder spreads based on the oxygen diffusion, either upwards or outwards from the layer of fuel particles (Ohlemiller 2-220). This model is restricted by reverse and forward propagation approaches. The combustion reaction is sometimes instigated by self-sustained processes. In this regard, self-sustained smolder propagation is prevalent by the oxidation kinetics of a solid. Reverse propagation is when oxygen diffuses to the reaction region from the external surface of the fuel layer. Forward propagation also affects the one-dimensional smolder in which oxygen flows in the similar direction as the movement of the smolder front (Ohlemiller

 

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write my assignment 7065

A horticulturist has just moved to Hamilton, New Zealand, and wants to measure the average springtime rainfall per day (Note: Spring is from September to December in the Southern Hemisphere). After measuring rainfall for 90 days in spring, the horticulturist finds that the average rainfall per day was 3.07mm with a standard deviation of 0.93mm per day. Use this information to solve the following and show all work.

a. Calculate the standard error of the sample mean of a sample of 90 measurements.

b. Show and interpret a 90% confidence interval for the mean daily rainfall.

c. The horticulturist decides to take more measurements in order to get a more accurate estimate. If the horticulturist wants to be able to show a 99% confidence interval for the mean daily rainfall with a margin of error equal to +/- 0.2mm, how large should the sample be?

 

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write my assignment 939

1.If a biochemical process produces 6 NADH molecules, 2 FADH2 molecules, and uses two ATP molecules, how many total ATP molecules will you have after NADH and FADH2 are processed via the ETC?

1 NADH = 2.5 ATP, 1 FADH2 = 1.5 ATP, 1 GTP = 1 ATP

2.If a biochemical process produces 3 NADH molecules, 1 FADH2 molecules, and 1 GTP molecule, how many total ATP molecules will you have after NADH and FADH2 are processed via the ETC?

1 NADH = 2.5 ATP, 1 FADH2 = 1.5 ATP, 1 GTP = 1 ATP

3.If you started with citrate and formed OAA, how many ATP molecules did you create?

1 NADH = 2.5 ATP, 1 FADH2 = 1.5 ATP, 1 GTP = 1 ATP

 

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