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kirill [66]
3 years ago
14

Pls help! its 20pts! brainliest, rattings, thanks, etc...

Chemistry
2 answers:
s344n2d4d5 [400]3 years ago
6 0

4: A - CO2

5: D- Magnesium chloride

6: A- Electrons are shared in a covalent bond

7: C- 12

I hope this helped :)

Brainliest?

Misha Larkins [42]3 years ago
5 0

Question 4: The first one

Question 5: The fourth one

Question 6: The first one

Question 7: The third one

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The nonvolatile, nonelectrolyte DDT , C14H9Cl5 (354.5 g/mol), is soluble in benzene, C6H6. Calculate the osmotic pressure (in at
Ainat [17]

Step 1

The osmotic pressure is calculated as follows:

\begin{gathered} \pi\text{ = C x R x T} \\ C\text{ = molarity = }\frac{moles\text{ of solute}}{Volume\text{ of solution \lparen L\rparen}} \\ R\text{ = 0.082 }\frac{atmxL}{mol\text{ x K}} \end{gathered}

-------------

Step 2

<em>Information provided:</em>

The mass of solute = 13.6 g

Volume of solution = 251 mL

Absolute temperature = T = 298 K

The molar mass of solute = M = 354.5 g/mol

-------------

Step 3

Procedure:

1 L = 1000 mL => Volume = 251 mL x (1 L/1000 mL) = 0.251 L

---

C = moles of solute/volume of solution (L)

C = mass of solute/(molar mass x Volume (L))

C = 13.6 g/(354.5 g/mol x 0.251 L)

C = 0.153 mol/L

---

π = C x R x T

π = 0.153 mol/L x 0.082 atm L/mol K x 298 K

π = 3.74 atm

Answer: π = 3.74 atm

4 0
1 year ago
Please explain how to do this one !! Which of the following ionic solids would have the largest lattice energy?
julsineya [31]

Answer:

I think it's Csl

I don't really know

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5 0
3 years ago
A student asks why the ashes from a fire have a much lower mass than wood that was burned.
valkas [14]

I belive it would be A? BUT IN NOT QUIE SURE? 0_0


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3 years ago
Which statement best explains how organ systems work together to remove wastes?
sashaice [31]

D is your answer correct.

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Which statement best describes the polarity of CH3Cl? a) The molecule is always polar. b) The molecule is always nonpolar. c) De
Solnce55 [7]

Answer:

a) The molecule is always polar.

Explanation:

The molecule is always polar because of two reasons:

  • all the bonds are polar due to the difference in electronegativity between carbon and hydrogen & carbon and chlorine.

                                              AND IMPORTANTLY

  • The molecule is asymmetrical meaning that the dipoles cannot cancel each other out (like they do in methane or carbon dioxide for example) so the net effect is a polar molecule.
7 0
3 years ago
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