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# Nirupama's Responses in WyzAnt Answers

#### Why is Shakespeare important?

its for discussion in class

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10

Shakespeare is important because he has made a significant contribution to the English literature through his work on Drama or Plays. Reading and analyzing his work also provide insight into the culture and society around those times.

#### what elements is represented by each electron cofiguration

{ar} 4s2

{kr} 5s4d 10 5p4

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Asked by Calandra from Memphis, TN
00

To keep it really simple, Ar has 18 electrons. Then adding the 2 electrons of the 4s orbital , we get 20 which is the atomic number of Calcium whose symbol is Ca.

Similarly, Kr has 36 electrons. Then adding the 2 electrons of 5s, 10 electrons of 4d and 4 electrons of 5p orbitals, we get 36 + 2 + 10 + 4 = 52 and this is the atomic number of Tellurium whose symbol is Te.

Now you could apply this to other similar questions using the periodic table.

#### graph -1/2x + 1/6y = 2/3

graph -1/2x + 1/6y = 2/3

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Asked by Teri from Mosinee, WI
00

Was not sure if you meant -1/(2x)+ 1/(6y) = 2/3 or (-1/2)x + (1/6)y = 2/3

The solution for -1/(2x)+ 1/(6y) = 2/3 is as follows:

-1/(2x) + 1/(6y) = 2/3

could be rewritten as follows by adding 1/(2x) to both sides of the equation.

-1/(2x) + 1/(2x) + 1/(6y) = 2/3 + 1/(2x)

1/(6y) = 1/(2x) + 2/3.

Now we add the components on the right side with common denominator

1/(6y) = (3 + 4x)/(6x)

which can be further simplified as follows

1/y = (3 + 4x)/x

Now we have to find the multiplicative inverses on both sides. That is,

y = x/ (3 + 4x) or y = x/ (4x + 3)

Now to plot a graph, we have to find the ordered pairs or the co-ordinates of the points and then join them.

For eg: when x= 0, y= 0; x= 3, y= 3/15 or 1/5; we have ordered pairs and they are P1 (0,0) and P2 (3,1/5). P1 and P2 can be connected.

#### calculating the van't Hoff factor

When 9.12 g of HCl was dissolved in 190 g of water, the freezing point of the solution was -4.65oC.  What is the value of the van't Hoff factor for HCl?

Here is what I did-

I know that I use: deltaT= Kf x m x i

rearranged to solve for i: deltaT/Kf x m

solving for molality:

mol HCl=0.250

kg solvent= .190

m=0.250/.190= 1.32

i= -4.65oC/1.86 x 1.32 = -1.89

I am not sure if the value for i can be negative or if I did the problem correctly.  Please help me!  Thanks!

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Asked by Michael from Crown Point, IN
00

Although for this question, you will have to determine the Van't Hoff factor using the formula, there is a neat of verifying your answer.

Let us denote the Van't Hoff factor by i.

The i value for a molecule like say glucose (does not dissociate when dissolved in a solvent like water)is generally considered as 1.

The i value for a strong base or acid or salt is obtained by adding the number of anions and cations.

For eg: MgClhas Mg+2  and 2 Cl-  thereby a total of 3 ions.

But for a weak acid or a weak base i is considered to be 1.

Now for HCl, since it is a strong acid and is dissociated as H+ and Cl-, we can expect it to have i value as 2 and the answer that you obtained as 1.89 is fairly close to 2.0

#### 4 x-2 z = b-2 solve for x

4 x-2 z = b-2

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Asked by Seb from Sequim, WA
00

4x - 2z = b-2.

In order to solve for x, shift all the other terms to the R.H.S (Right Hand Side of the equation).

4x = b-2 +2z

Now divide both sides by 4.

x = b/4  -2/4 + 2z/4  (Now we have to simplify or reduce the fractions)

=  b/4 -1/2 + z/2    which could be rewritten as

=  b/4 + z/2 - 1/2.

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