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3 years ago

11

What new information can you add to your definition of physical change ?

1 answer:

Mamont248 [21]3 years ago

7 0

Its reversible, soluble, <span>mass, density, color, boiling point, temperature, and volume. </span>

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Taylor mixed two liquids together in a beaker. The beaker quickly heated up. What does this indicate about the reaction that too

amm1812

Answer: c

Explanation:energy cannot be made or destroyEd according to a law of energy

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3 years ago

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How many electrons are transferred in the following reaction?

Semmy [17]

Answer:

6

Explanation:

Oxidation reaction is defined as the chemical reaction in which an atom looses its electrons. The oxidation number of the atom gets increased during this reaction.

$X\rightarrow X^{n+}+ne^-$

Reduction reaction is defined as the chemical reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

$X^{n+}+ne^-\rightarrow X$

For the given chemical reaction:

$Mg(s)+Al^{3+}(aq.)\rightarrow Al(s)+Mg^{2+}(s)$

The half cell reactions for the above reaction follows:

Oxidation half reaction: $Mg\rightarrow Mg^{2+}+2e^-$

Reduction half reaction: $Al^{3+}+3e^-\rightarrow Al$

Magnesium is loosing 2 electrons to form the magnesium cation. Thus, it is getting oxidized. Aluminum anion is gaining 3 electrons to form Aluminum. Thus, it is getting reduced.

Thus, balancing the half-reactions as:-

Oxidation half reaction: $3Mg\rightarrow 3Mg^{2+}+6e^-$

Reduction half reaction: $2Al^{3+}+6e^-\rightarrow 2Al$

Thus, total number of electrons transferred = 6

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4 years ago

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Match the molecules below with their functions:

alex41 [277]

Answer:

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Have an amazing day!!

Please rate and mark brainliest!!

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2 years ago

What is one fact you learned about the gases in our atmosphere that you did not know ? PLEASE HELP ! NEED DONE

Mandarinka [93]

Well that is up to you what did you not know but learned recently.

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3 years ago

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spayn [35]

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4 years ago