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3 years ago

Plastic is used for making a large variety of articles of daily use and these articles are very attractive. But it is advised to

Chemistry

2 answers:

boyakko [2]3 years ago

4 0

Answer:

please select my answer as brainlist answers

Explanation:

plastic is harmful for the environment

Fudgin [204]3 years ago

3 0

Plastic is harmful for the environment because it takes a long time to decompose. Some people chose to burn the plastic as the fastest and easiest way to decompose it and it can cause the air pollution. In addition, plastic also dangerous for the marine life, for example likes sea turtles. They might misktaken that the plastic is seaweed as sometimes plastic actually seems like floating seaweed.

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Where are the different particles in an atom located and what are their charges?

satela [25.4K]

Explanation:

The different subatomic particles in an atom are the:

Protons which are the positively charged particles.
Electrons which are the negatively charged particles.
Neutrons which do not carry any charges.

Protons and neutrons are located in the nucleus of an atom which is the tiny center of the atom.

Electrons orbits around the nucleus and fill the rest of the volume of atom.

4 0

3 years ago

Which of the following redox conditions will produce a spontaneous reaction?

Morgarella [4.7K]

Answer:

A. The sum of the voltages of the half-reactions is positive.

Explanation:

correct on a p e x

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3 years ago

What is the OH in a solution made by adding 0.060 mole of calcium oxide to 500.0ml

Alex73 [517]

Answer:

0.24 mol/L.

Explanation:

Ca(OH)₂ dissociates in solution according to the equation:

Ca(OH)₂ → Ca²⁺ + 2OH⁻.

Every 1.0 mol of Ca(OH)₂ dissociates to give 2.0 moles of OH⁻.

∴ The no. of moles of OH⁻ produced from 0.06 mol of Ca(OH)₂ = (2 x 0.06 mol) = 0.12 mol.

∴ [OH⁻] = no. of moles / V of the solution = (0.12 mol)/(0.5 L) = 0.24 mol/L.

8 0

4 years ago

Ionization energies tend to do what across a period

neonofarm [45]

Trend-wise, ionization energy tends to increase while one progresses across a periodbecause the greater number of protons (higher nuclear charge) attract the orbiting electrons more strongly, thereby increasing the energy required to remove one of the electrons.

6 0

3 years ago

Consider the two reduction half-reactions: Na+(aq) + e− LaTeX: \longrightarrow⟶ Na(s) Eo = −2.71 V Cl2(g) + 2 e− LaTeX: \longrig

Juli2301 [7.4K]

Answer:

(i) Δ $E^{o}_{cell} }$ = -4.07v

(ii)Δ $G^{o}_{rxn}$ = +785.510 KJ

(iii) The reaction is for an electrolytic cell

Explanation:

In this question, we are tasked with calculating Δ $E^{o}$ and Δ $G^{o}_{rxn}$ for the reaction and determine if the reaction is for a voltaic or electrolytic cell.

We proceed as follows;

Firstly, we write the complete equation of reaction as shown below;

$2Na^{+}$ + $2Cl^{-}$ → $2Na_{(s)}$ + $Cl_{2(g)}$

We can see that chlorine goes from a negative state to zero state. This is indicative of loss of electron which is defined as oxidation

We can also see that sodium went from a positive state to zero state which is indicative of electron gain which is defined as reduction

Mathematically, the value of Δ $E^{o}_{cell} }$ for the reaction can be calculated using the formula below;

Δ $E^{o}_{cell} }$ = Δ $E^{o}_{reduction} }$ - Δ $E^{o}_{oxidation} }$ = -2.71v - 1.36v = -4.07V

The value of Δ $G^{o}_{rxn}$ can be calculated as follows;

Δ $G^{o}_{rxn}$ = -nFΔ $E^{o}_{cell} }$

Where n = 2 and F is 96,500C . We plug these values to get;

Δ $G^{o}_{rxn}$ = -2 × 96,500C× -4.07V = 785,510J = 785.510KJ (1KJ = 1000J)

Now, we answer if this reaction is for a voltaic or an electrolytic cell;

It is for an electrolytic cell because electrons flow from cathode to anode as indicated by magnitude of the Δ $G^{o}_{rxn}$ (positive in value)

7 0

3 years ago