What are the indications/signs that a chemical change has occurred?

1 answer:

7 0

Light is given off, a permanent color change occurs, gas is given off, heat is given off, and a precipitate is formed

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Where is the potential energy equal to 0

sasho [114]

Answer:

For example, the lowest height in a problem is usually defined as zero potential energy, or if an object is in space, the farthest point away from the system is often defined as zero potential energy. Then, the potential energy, with respect to zero at →r0, r → 0 , is just U(→r). U ( r → )

Explanation:

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3 years ago

What kind of chemical change do you think occurs when a banana peel turns brown in the open air?

sineoko [7]

It has to be oxydation. Oxygen is what slowly poisons us until we die and makes us wrinkle.

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4 years ago

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In the following net ionic equation, identify each reactant as either a Bronsted-Lowry acid or a Bronsted-Lowry base. HCN(aq) H2

vfiekz [6]

Answer:

Explanation:

The definition of acids and bases by Arrhenius Theory was modified and extended by Bronsted-Lowry.

Bronsted-Lowry defined acid as a molecule or ion which donates a proton while a base is a molecule or ions that accepts the proton. This definition can be extended to include acid -base titrations in non-aqueous solutions.

In this theory, the reaction of an acid with a base constitutes a transfer of a proton from the acid to the base.

From the given information:

$\mathsf{HCN _{(aq)} + H_2O_{(l)} \to CN^{-}_{(aq)} + H_3O_{(aq)}}$

From above:

We will see that HCN releases an H⁺ ion, thus it is a Bronsted-Lowry acid

$H_2O$ accepts the H⁺ ion ,thus it is a Bronsted-Lowry base.

The formula of the reactant that acts as a proton donor is HCN

The formula of the reactant that acts as a proton acceptor is H2O

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3 years ago

Bloc ate 1 craft craft had 3 crafts. How much crafts are there?

vova2212 [387]

If he had 3 and then ate 1 them that would mean that he has 2 crafts left

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A white powder is poured into a glass of water and shaken. If the powder remains visible and can be filtered out, the mixture is

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in an electrolyte solution

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