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djyliett [7]
2 years ago
8

DDT was banned from use as a pesticide in the United States because

Chemistry
1 answer:
Dmitry_Shevchenko [17]2 years ago
5 0
Too much money and dangerous 
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A weather balloon has a volume of 750ml when filled with helium at 8c at a pressure of 380torr. What is the new volume of the ba
DerKrebs [107]

Answer:

Using general gas laws

P1V1/T1 = P2V2/T2

Where P1=380torr = 380mmHg

Vi = 750ml = 0.75dm3

T1= 8c = 281k

P2=0.2torr= 0.2mmHg

T2= 75c = 348k

V2=?

(380*0.75)/281 = (0.2*V2)/348

V2= 1764.77

Explanation:

3 0
3 years ago
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¿Cual es porcentaje de una solucion que contiene 10g de sal disueltos en 500 mL de solución?
never [62]

Answer:

0.02 g/ml

Explanation:

si dividimos 10 con 500, es decir, 10/500, obtenemos 0.02. Las unidades serán g / ml.

4 0
3 years ago
The Periodic Table of Elements is organized by the number of:
ASHA 777 [7]
The classic Periodic Table<span> organizes the chemical </span>elements<span> according to the </span>number of<span> protons that each has in its atomic nucleus. Hope this helped :)</span>
5 0
2 years ago
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Which analogy best represents a saturated solution?
MrMuchimi

The first scenario would be a solution that is in an equilibrium state. The second seems more like a super saturated solution where the container (the field) holds more solute (players) than it should actually hold. So that would leave the third scenario as being the one that is just saturated.
7 0
2 years ago
Write a Lewis structure for each atom or ion. Draw the particle by placing atoms on the grid and connecting them with bonds. Inc
andrew11 [14]

Answer:

The Lewis structure to this question can be described as follows:

Explanation:

Structure of Lewis for  S^{2-}:  

The maximum number of electrons from valence in S^{2-}  is 8 (6 from S as well as 2 from negative change).  

The valence electrons in the Lewis structure are placed on four sides of the atom.  

Thus the structure of Lewis for S^{2-} is as follows:

\left[\begin{array}{ccc} &. .&\\: &S&:\\&. .&\end{array}\right] ^{2-}

Lewis Mg Structure:  

Complete valence electrons are 2 in Mg.  

The Lewis structure for Mg, therefore, is as follows:

\ . \\ Mg\\ \ .

The Lewis structure for  Mg^{2+}

The maximum valence of electrons   Mg^{2+} in is=  0.

Thus, the structure for   Mg^{2+} is as follows:

 Mg^{2+}

Lewis structure for P :

The maximum number of valence electrons in P is = 5.

Thus, the structure for P is=

\ \ \ . \\ : P \ : \\

8 0
3 years ago
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