Sa. Which drawing (above) depicts the electron configuration of Nitrogen N) (0.S

Question

Sa. Which drawing (above) depicts the electron configuration of Nitrogen N) (0.Spts) Sb. How many protons does Nitrogen have? (0.Spes) 6a. How many grams of glucose (C H2O6 molecular mass·180 daltons) would be present in one liter of a 1 M (molar) solution of glucose? (0.5pts) 6b. How many grams of glucose would you have to weigh out to make 500mls of a 0.5 M solution of glucose? (0.5pts) shion and to be sure that any summaries (mean, median, When organizing biological data, it is important so present it in a clear fa range, standard deviarion) accurately reflect the results. The mean is the average of the data (add all the numbers and divide thar answer by the number of tems you added). The mrdan s the mulle number. The standard deviation (SD) a an ideation of how far your data strays from the average., The lower the SD, the more accurately the mean represents the duta. The range is just the smallest to the largest number ise a computer based spreadsheet program to repvesent the following experimental results 7. After measuring the wrist size of everyone in the class, you end up with the following data: 13 cm, 15 cm, 21 em 20cm,14cm, 14 cm, 22 . 18 cm, 22 .24 cm, 20 cm. 24 cm, 23 cm,17 16cm, 17 . 21 . 16cm, 22 cm, 21cm, 23 cm. cm, 23 cm, 22 en, 22 cm, i6en, is cm. a 2 pts) Present these data as a column graph and as a table (attach and hand-in). Make sure you use descriptive titles and axis labels b. (0.5 pts) What is the value of the mean of the data presented above? c. (0.5 pts) what are the median and the range of the data presented above? d. (0.5 pt) What is the standard deviation of the data presented above? value? Why? e. (0.5 pts) Is it better for the standard deviation value to be a large value or a small activities and questions in this assignment were exceedingly difficult for you to complete or seemed unfamiliar, you may not be prepared to take Biol 213. Talk to your lecture instructor or an academic advisor

Explanation / Answer

ANS 5(a):

Given in the figure are five different drawings each of which depicts an electronic configuration of a particular atom.

We know from the periodic table of elements that the atomic number of Nitrogen (N) is 7.

Atomic number of an atom is the number of electrons associated with one atom of that element. So from this we know that Nitrogen has 7 electrons.

Now we have studied the electronic configuration of atoms. Electronic configuration of an atom is theoretical representation of how electrons are residing within the shells.

We know that the electronic configuration of Nitrogen is 1s2,2s2 2p3 making a total of 7 electrons.Let's not focus on orbitals s and p here and let's just be focused on shell numbers "1" and "2" here. The maximum number of electrons belonging to a shell can be 2N2 only where N is the shell number so we can't fill all the electrons in one shell.So in first shell there will be only 2 electrons at max and in second shell there can be 8 electrons at max. Since we have only 7 electrons(atomic number of N) to fill so we will get 2 electrons in first shell and remaining 5 electrons in second shell.In the second picture in the diagram, we can see that there are two electrons in first shell and 5 electrons in the second.

That will be the correct answer.

ANS 5(b): In any atom of any element number of electrons are always equal to number of protons. This is so because electrons are negatively charged and protons are positively charged.When their numbers are equal the total charge generated from the electrons and the protons balance each other keeping the atom Neutral,which is the stable form.

Coming back to the question, Nitrogen has 7 electrons so number of protons in Nitrogen atom too will be 7.

ANS 6(a):

We have 1 Molar solution of Glucose. Volume of the solution is 1 litre.

We have been given with the molarity of the solution. Molarity is the number of moles of a substance or solute dissolved in one litre solvent.

So the formula for calculating molarity will be

Molarity = Moles of solute / Volume(in litre)

Moles can also be written as   

Moles = Weight of solute/ Molar weight of solute

So overall formula for molarity will be

Molarity = weight of solute(in grams)/Molar weight * Volume

In the question our solute is Glucose. It's molar mass is 180. Molarity is 1.

From the formula,

1 = weight of glucose / 180 * 1

So, weight of glucose = 180 grams

So we will require 180 grams of glucose to make 1 litre 1molar solution of it.

ANS 6(b): Now,by simply using the formula we can solve this.

We have to make 500mL solution of 0.5 molarity.

First we will convert the volume from mL to litre which is 1/2 litre or 0.5 litre.

Now the formula is applied.

Molarity = weight of glucose/molar weight of glucose * volume

0.5 = weight of glucose/180 * 0.5

weight of glucose = 0.5 *180*0.5

weight of glucose = 90 grams.

So we will require 90 grams of glucose to make 0.5 molar 500mL solution  

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