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alisha [4.7K]
3 years ago
9

Andre adds a spoonful of baking soda to a glass of vinegar. Bubbles begin to appear in the vinegar. The bubbles signal the forma

tion of a(n) __________.
A.
compound
B.
mixture
C.
element
D.
atom
Chemistry
2 answers:
Bezzdna [24]3 years ago
4 0
 Andre adds a spoonful of baking soda to a glass of vinegar. Bubbles begin to appear in the vinegar. The bubbles signal the formation of a compound. I hope the answer helped you.
marishachu [46]3 years ago
3 0

Its A the answer is a

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Suppose the decomposition of dinitrogen monoxide proceeds by the following mechanism:
photoshop1234 [79]

Answer:

Part A: 2N₂O(g) ⇄ 2N₂(g) + O₂(g)

Part B: -r = K*[N₂O]²

Part C: K= k1*k2

Explanation:

Part A

To do the balance chemical question for the overall chemical reaction, we must sum the reaction of the steps, eliminating the intermediaries, which are the compounds that have the same amount both at reactants and products (bolded).

N₂O(g) ⇄ N₂(g) + O(g)

N₂O(g) + O(g) ⇄ N₂(g) + O₂(g)

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

2N₂O(g) + O(g) ⇄ 2N₂(g) + O(g) + O₂(g)

2N₂O(g) ⇄ 2N₂(g) + O₂(g)

Part B

The velocity of the reaction (r) can be calculated based on the reactants or based on the products. Let's do it based on the disappearing of the reactant. Because it is disappearing, the variation at its concentration must be negative, so the rate will be negative.

Let's suppose its an elementary reaction, so, the concentration of the reactant must be elevated by its coefficient. And let's call the overall rate constant as K:

-r = K*[N₂O]²

Part C

Because the steps were summed, and the reactions were not multiplied by a constant or inverted, the constant K is just the multiplication of the constants of the steps:

K= k1*k2

8 0
3 years ago
Distinguish between metal and non metal with example
antiseptic1488 [7]

Answer:

Explanation:

Metal is a material in the periodic table s much as iron or gold. A non metal is carbon in diamonds and graphite for pencil lead.

5 0
3 years ago
Read 2 more answers
A compound, Y of sodium forms a white powder. It is a constituent of baking powder and isused in some antacids. When heated it g
Gnom [1K]

Answer:

sorry i dont know the answer

Explanation:

sorry i dont know the answer

6 0
3 years ago
Which of the following results in an increase in the entropy? (4 points)
Dima020 [189]

Dissolving sugar in water results in an increase in the entropy.

Hence, Option (D) is correct answer.

<h3>What is Entropy ?</h3>

Measurement of randomness of a system is called entropy. It is an extensive property. It is a state function. Unit of entropy is JK⁻¹ mol⁻¹.

Now lets check all options one by one

Option (A): Freezing water

Freezing water decreases the entropy because here second law of thermodynamics does not violate.

So it is incorrect option

Option (B): Cooling water

Cooling water does not increases entropy because entropy increases when solid melts to give liquid.

So it is incorrect option

Option (C): Condensing water vapour

In Condensing water vapour the temperature of liquid phase decreases and thus kinetic energy decreases. The randomness will decrease and hence entropy will also decrease.

So it is incorrect option.

Option (D): Dissolving sugar in solute

In dissolving sugar in solute the solid dissociates to ions and  the randomness will increase and hence entropy will also increase.

So it is correct option

Thus from the above conclusion we can say that Dissolving sugar in water results in an increase in the entropy.

Hence, Option (D) is correct answer.

Learn more about the Entropy here: brainly.com/question/1477087

#SPJ1

6 0
2 years ago
Which characteristic is typical of metals? A. They are brittle. B. They do not conduct electricity. C. They are highly soluble i
shutvik [7]

D. They are malleable.


7 0
3 years ago
Read 2 more answers
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