Answer:
greenhouse effect
Explanation:
Greenhouse effect -
It is the process by which the radiations on the planet gets trapped inside its atmosphere and increases the temperature of the planet , is referred to as the process of greenhouse effect .
Few gases are responsible to show this process , like carbon dioxide . methane , water vapour etc.
The process of greenhouse is important for the planet to sustain life , as it makes the planet warm and thereby don't allow the planet to freeze ,
But excess of greenhouse effect can make the planet extremely warm , and lead to a condition of global warming .
Hence , from the given information of the question ,
The correct answer is greenhouse effect .
Answer:
is an oxidation-reduction reaction.
Explanation:
In an oxidation-reduction reaction, the oxidation number of some elements must change during reaction.
represents an oxidation-reduction reaction.
oxidation number
Fe in +3
Fe in Fe 0
C in CO +2
C in +4
SO, oxidation number of Fe decreases during reaction. Hence is being reduced. Also, oxidation number of C increases during reaction. Hence CO is being oxidized.
In all other given reactions, oxidation number of elements are not changed during reaction. Hence they are not oxidation-reduction reaction.
Answer: it's A
Explanation:
B) penetration.
C) paramagnetism.
D) electron-pair repulsion.
E) relativity
Answer:
A = shielding.
Explanation:
The addition of electron causes the atomic size increase from top to bottom due to increase in atomic number.
As the atomic number increased one more electron is added and because of this electron on more electronic shell is added. Thus the electron become more away from the nucleus as many of other electrons are present in the way from nucleus to the outer electrons.
The hold of nucleus becomes weaker. Although nuclear charge is also increased but at the same time other electrons shield the respective electrons. So effective nuclear charge is weaker than the actual nuclear charge.
Because of this shielding it is easy to remove the electrons or we can say ionization energy decreases.
Here, we are required to determine why the effective nuclear charge for an atom is less than the actual nuclear charge.
First, we must know that the effective nuclearcharge is the net positive charge exerted on the negatively charged Valence electrons by the nucleus.
The bigger an atom is, the farther are it's Valence electrons from the positively charged nucleus.
The shielding effect of these electrons therefore, reduce the nuclear charge that is felt by the valence electrons and ultimately, the effective nuclear charge is less than the actual nuclear charge.
Read more:
Grams of the gas can be estimated by multiplying the moles and the molar mass. To produce 1 mole of aluminum oxide, 48 gms of oxygen is required.
The mass of the substance is the product of the moles and the molar mass of the given substance.
The balanced chemical reaction is shown as:
4 Al (s) +3 O₂ (g) → 2 Al₂O₃ (s)
From the above reaction, it can be concluded that:
3 moles of oxygen = 2 moles of aluminum oxide
So, x moles of oxygen = 1.00 moles of aluminum oxide
x is calculated as:
x = 3 ÷ 2 = 1.5 moles
Mass of oxygen:
mass = moles × molar mass
= 1.5 × 32
= 48 gms
Therefore, 48 gms of oxygen is required to produce 1 mole of aluminum oxide.
Learn more about mass here:
#SPJ5