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Nostrana [21]
3 years ago
13

A student performs the follow experiment.Step 1: she pours a colorless solution into a beaker that contains another colorless li

quid. Yellow particles appear in the liquid Step 2: she lets the yellow particles settle in the beaker and then deprecated the colorless liquid by recantation. Which has most likely occurred in the beaker?
Chemistry
2 answers:
omeli [17]3 years ago
4 0

Answer:

A chemical change in 1 step and a physical change in 2 step.

Explanation:

In the first step, when the student poured colorless solution into the another liquid, yellow particles appeared which means that there is some chemical reaction which has taken place.

In the step 2,  when these yellow colored particles precipitate settled, a colorless liquid at top is left,  so, this is a physical change because no new substance was produced and through the recantation it was removed.

Katen [24]3 years ago
3 0

Answer:

The answer is (A) peeps.

Explanation:

Got a 100% on the quiz

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Answer

A. It changes the rate, R

Explanation

When we change the concentration of the reactants in a chemical reaction, it affects the rate of reaction that happens in the process. Typically, the rate of reaction will decrease with time if the concentration of the reactants decreases because the reactants will be converted to products. Similarly, the rate of reaction will increase when the concentration of reactants are increased.

4 0
3 years ago
Complete the equation to show how hydrofluoric acid, HF, acts as a Brønsted-Lowry acid in water. Balanced equation:
shepuryov [24]

Answer : The balanced equation is,

HF+H_2O\rightleftharpoons H_3O^++F^-

Explanation :

According to the Bronsted Lowry concept, Bronsted Lowry-acid is a substance that donates one or more hydrogen ion in a reaction and Bronsted Lowry-base is a substance that accepts one or more hydrogen ion in a reaction.

The balanced chemical reaction will be,

HF+H_2O\rightleftharpoons H_3O^++F^-

In this reaction, hydrofluoric acid is act as a Bronsted Lowry-acid because it donate one hydrogen ion to H_2O and H_3O^+ is act as a Bronsted Lowry-base because it accept one hydrogen ion from HF.

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4 years ago
Near the equator, the sun heats the surface strongly, causing warm air to rise steadily. This creates the _________________, an
kenny6666 [7]
Doldrums, low is the correct answer.
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3 years ago
Which phrase best describes activation energy? (1 point)
iren [92.7K]

Answer: the minimum amount of energy required to break bonds and start a chemical reaction

Explanation: got a 100% on the quick check

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kifflom [539]

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