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3 years ago

Which is evidence that the reaction below is a redox reaction?

Chemistry

2 answers:

kvv77 [185]3 years ago

7 0

Answer:

The correct answer was A. The sodium atom is a pure element as a reactant and becomes part of a compound.

Explanation:

I took the test

Ksenya-84 [330]3 years ago

6 0

Answer:The correct answer is:

Two different elements take part in the reaction.

Explanation:

A redox reaction is generally defined as chemical reaction in which oxidation and reduction takes place simultaneously.It is a reaction between two species among which gain and loss of electrons takes place.

So, in the given reaction, sodium metal looses an electron to chlorine atom to form sodium chloride molecule.

$Na\rightarrow Na^++e^-$ Oxidation

$Cl+e^-\rightarrow Cl^-$ Reduction

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3 years ago

Read 2 more answers

Titration of a 20.0-mL sample of acid rain required 1.7 mL of 0.0811 M NaOH to reach the end point. If we assume that the acidit

Rasek [7]

Answer:

Concentration of sulfuric acid in the acid rain sample is 0.0034467 mol/L.

Explanation:

Volume of NaOH = 1.7 ml = 0.0017 L

Molarity of NaOH = 0.0811 M

Moles of NaOH = n

$0.0811 M=\frac{n}{0.0017 L}$

n = 0.0001378 mol

$H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O$

According to reaction, 2 mol of NaOH neutralize 1 mol of sulfuric acid.

Then 0.0001378 mol of NaOH will neutralize:

$\frac{1}{2}\times 0.0001378 mol=6.8935\times 10^{-5} mol$ of sulfuric acid.

Concentration of sulfuric acid in the acid rain sample: x

$x=\frac{6.8935\times 10^{-5}}{0.02 L}=0.0034467 mol/L$

Concentration of sulfuric acid in the acid rain sample is 0.0034467 mol/L.

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3 years ago

What is the mass of a ink pen with triple beam balance

Gnesinka [82]

The mass of an ink pen with a triple beam balance if all the weights positioned to the right would be a maximum of 610 grams which sounds rather heavy for an ink pen but in the absence of necessary information it seems that that would have to be the answer.

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3 years ago

Explain how its electron configuration influences the chemical behavior of an atom.

Llana [10]

More unstable an electron configuration , the more reactive an atom will become.

How electron configuration influences the chemical behavior of an atom?

This is happen generally, If we look at the Group 1 elements in the periodic table, they are all highly reactive as they have 1 electron in their outermost shells - an unstable configuration in terms of energy.

Also, the noble gases in Group 8 in the periodic table are 'inert' that means they don't react (or more correctly, have an incredibly low reactivity). This is because they have 8 electrons in their outermost shell and thus have no need to acquire or lose electrons to possess a stable electron configuration.

Hence, electron configuration influences the chemical behavior of an atom.

learn more about electronic configuration here :

brainly.com/question/26084288

#SPJ4

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1 year ago