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3 years ago

. Cu - Cu2+ + 2e-

Chemistry

1 answer:

zhannawk [14.2K]3 years ago

6 0

Answer:

An oxidation reaction

Explanation:

Only one reaction happened and no reduction occurs.Hence, this the redox reaction does not happen.

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The salt which in solution gives a pale green precipitate with sodium hydroxide solutionanda white precipitate with barium chlor

ELEN [110]

Answer:

Analytical Chemistry. The salt which in solution gives a pale green precipitate with sodium hydroxide solution and a white precipitate with barium chloride solution is : Iron (III) sulphate.

7 0

3 years ago

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Plasma occurs in electrical sparks. These sparks contain A) free protons. B) free molecules. C) ions and electrons. D) neutrons

Archy [21]

I looked it up and i saw tht it was ions and electrons.
hope this helps you!! :)

5 0

3 years ago

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Lewis plot structure of Ca

Anna [14]

Answer:

Ca:

Explanation:

A Lewis structure shows the number of valence electrons about an atom.

Ca is in Group 2 of Period 4.

Its electron configuration is [Ar]4s².

Thus, Ca has two valence electrons and its Lewis structure is Ca:

8 0

3 years ago

1. Which liquid sample is a pure substance?

IRISSAK [1]

The whole Activity , poem and paragraph is missing in the question.

Answer:

(1) Liquid A

(2) Solid A

Explanation:

Using this part of the given poem

Substances and mixtures behave differently,

During boiling and melting most especially

Boiling point of substance is fixed while mixture is not

Substance melts completely but mixture does not

The boiling point of the Pure substance remain fixed after reaching its boiling point this is shown by Liquid A

Solid A is melting completely so Solid A is a pure substance.

6 0

3 years ago

Question 26 Suppose a flask is filled with of and of . The following reaction becomes possible: The equilibrium constant for thi

Blizzard [7]

Answer:

0.36 M

Explanation:

There is some info missing. I think this is the complete question.

Suppose a 250 mL flask is filled with 0.30 mol of N₂ and 0.70 mol of NO. The following reaction becomes possible:

N₂(g) +O₂(g) ⇄ 2 NO(g)

The equilibrium constant K for this reaction is 7.70 at the temperature of the flask. Calculate the equilibrium molarity of O₂. Round your answer to two decimal places.

Initially, there is no O₂, so the reaction can only proceed to the left to attain equilibrium. The initial concentrations of the other substances are:

[N₂] = 0.30 mol / 0.250 L = 1.2 M

[NO] = 0.70 mol / 0.250 L = 2.8 M

We can find the concentrations at equilibrium using an ICE Chart. We recognize 3 stages (Initial, Change, and Equilibrium) and complete each row with the concentration or change in the concentration.

N₂(g) +O₂(g) ⇄ 2 NO(g)

I 1.2 0 2.8

C +x +x -2x

E 1.2+x x 2.8 - 2x

The equilibrium constant (K) is:

$K=7.70=\frac{[NO]^{2}}{[N_{2}][O_{2}]} =\frac{(2.8-2x)^{2} }{(1.2+x).x}$

Solving for x, the positive one is x = 0.3601 M

[O₂] = 0.3601 M ≈ 0.36 M

7 0

3 years ago