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Marina86 [1]
4 years ago
13

Using the clues in the text you can determine environmental toxicologist studies how chemicals affect the environment

Chemistry
2 answers:
mr_godi [17]4 years ago
7 0
True I had the question
Nitella [24]4 years ago
6 0
It would be answer A-True
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The equilibrium constant, K, for the following reaction is 1.80x102 at 698 K. 2HI(9) =H2(g) +129) An equilibrium mixture of the
Mrrafil [7]

Explanation:

The equilibrium constant of the reaction = K_c=1.80\times 10^{-2}

Initial  concentration of HI = 0.311 M

After addition 0.174 mol of HI(g)

Concentration of HI added = \frac{0.174 mol}{1 L}=0.174 M

New concentration of HI = 0.311 M + 0.174 M = 0.485 M

     2HI\rightleftharpoons H_2+I_2

Initial  concentration:

0.311 M                4.71\times 10^{-2} M           4.71\times 10^{-2} M  

At equilibrium:

(0.485 M - x)  (4.71\times 10^{-2} M+x)           (4.71\times 10^{-2} M+x)  

K_{eq}=\frac{[H_2][I_2]}{[HI]^2}

1.80\times 10^{-2}=\frac{(4.71\times 10^{-2} M+x)\times (4.71\times 10^{-2} M+x)}{ (0.485 M-x)^2}

\sqrt{1.80\times 10^{-2}}=\frac{(4.71\times 10^{-2} M+x)}{ (0.485 M-x)}

0.1342=\frac{(4.71\times 10^{-2} M+x)}{(0.485 M-x)}

0.065087 M-0.1342x=4.71\times 10^{-2} M+x

0.065087 M-4.71\times 10^{-2} M=1.1342x

x=\frac{0.017987 M}{1.3142}=0.01586 M

Equilibrium concentrations:

[HI]=0.485 M-x = 0.485 M - 0.01586 M= 0.46914 M

[H_2]=[I_2]=4.71\times 10^{-2} M+x=4.71\times 10^{-2} M+0.01586 M

[H_2]=[I_2]=0.06296 M

3 0
3 years ago
Which compound contains a double bond?
just olya [345]
The answer would be ethane (C2H4)
7 0
3 years ago
What is the name of the molecular compound SF 5? sulfur pentafluoride sulfur hexafluoride sulfur heptafluoride monosulfur tetraf
romanna [79]

Answer: sulfur pentafluoride

Explanation:

The rules for naming of binary molecular compound :

In the given formula, the lower group number element is written first in the name and keep its element name and the higher group number is written second.

First element i.e. sulphur in the formula is named first and keep its element name.

1) Gets a prefix if there is a subscript on it such as mono for 1, di for 2, tri for 3 and so on.

Second element i.e. fluorine is named second.

1) Use the root of the element name, if it is an anion then use suffix (-ide).

2) Always use a prefix on the second element such as mono for 1, di for 2, tri for 3 and so on.

Therefore, the chemical name of compound SF_5 is sulfur pentafluoride

4 0
3 years ago
What is convection?
torisob [31]

In CONVECTION, heat energy is carried by the movement of particles of matter. In CONDUCTION, heat is transferred by particles vibrating. In RADIATION, heat is carried directly by electromagnetic waves. When a hot object touches a cool object, heat moves from the hot one to the cool one.

The answer is D Transfer of heat through the movement of particles.

PLEASE MARK ME AS BRAINLIEST

4 0
3 years ago
What roles do society, politics, and economics play in science?
uranmaximum [27]
They make science a thing. Science isn't just space and microbes etc. We need science to solve things in society, politics, and economics.
3 0
3 years ago
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