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skelet666 [1.2K]
4 years ago
14

SOLVE Use the density formula to solve the following problems. A sample of a substance has a volume of 60.5 mL and a density of

1.20 g/mL. What is the mass of the sample?
Chemistry
1 answer:
Likurg_2 [28]4 years ago
5 0
Density = Mass/Volume
Therefore, Mass = Density x Volume

So the mass of the sample is 1.20 g/mL x 60.5 mL = 72.6 g
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When a system is at equilibrium________.
ikadub [295]

Answer:

The forward and the reverse processes are both spontaneous. (Ans. B)

Explanation:

When a system is at equilibrium state, then the rate of backwards, and forward, both reactions becomes equal. Which means the forward and the reverse processes are both spontaneous.

With the help of entropy change of the reaction, and Gibbs free energy we can determine the spontaneity of a reaction. If entropy changes is positive, and Gibbs free energy changes a negative, then the reaction will say to be spontaneous.

5 0
3 years ago
The following reaction mixture contains 0.22 M CH4, 0.67 M CO2 and 1.3 M H2O. Which of the following statements is TRUE concerni
Alekssandra [29.7K]

Answer:

Reaction is shifting left toward reactant side

Explanation:

4CuO(s) + CH₄(g) <=?=> CO₂(g) + Cu(s) + 2H₂O(g)

---------      0.22M             0.67M     -------    1.30M

Qc = [O₂(g)][H₂O(l)]²/[CH₄(g)] = (0.67)(1.30)²/(0.22) =5.12

Kc = 1.1 < Qc = 5.12 => Reaction is shifting LEFT and reactant concentrations are increasing with product concentrations decreasing. Qc will be decreasing and final Kc value will be lower than original Qc upon reaching equilibrium stability.  

_____________________

FYI Note => For reaction mixtures the following is a good guide to reaction response to applied system stress. Note the conclusion follows the direction the inequality symbol is pointing.  

Kc  <  Qc  => Rxn system is shifting Left

Kc =   Qc  => Rxn system is at equilibrium

Kc >  Qc  => Rxn system is shifting Right

6 0
3 years ago
Please answer and explain
katen-ka-za [31]

The triple bonds are the shortest bonds. So the correct option is C.

<h3>What are bonds?</h3>

Chemical bonds are the bonds that are the attraction between ions or molecules that makes up compounds.  There are different types of bonds They are covalent, ionic, hydrogen, electrostatic, etc.

A single bond is formed when only one electron is shared between atoms. As the same triple bonds are formed when there are three electrons shared between atoms. Triple bonds are the shortest because they have less strength.

Thus, the correct option is C. triple bonds are the shortest.

To learn more about Chemical bonds, refer to the below link:

brainly.com/question/13655260

#SPJ1

8 0
2 years ago
2.17 in to 10^23 molecules of Br 2 to moles
KiRa [710]

I don't get what you are saying... Can you reword it?

3 0
3 years ago
Select all that are true
kipiarov [429]
I think it’s B not quite sure ! Sorry
8 0
3 years ago
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