What is the empirical formula of a compound containing 24.56% potassium, 34.81% manganese, and 40.50% oxygen?
Answers
24.56g K *(1 mol/39.10g)= .6281 mol K
34.81g Mn *(1mol/54.94)= .6336 mol Mn
40.50g O *(1mol/16.00g)= 2.531 mol O
Remember that we are trying to find the ratio between them. The easiest way to do that is to divide each by the smallest number:
.6281 mol K /.6281 mol = 1
.6336 mol Mn /.6281mol = 1.0
2.531 mol O /.6281 mol =~ 4.0
So you have a ratio of 1:1:4 (there is some degree of approximation that you have to make)
So the empirical formula is:
KMnO4
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Answers
Answer: is considered as the limiting reagent for this reaction.
Explanation:
Limiting reagent is the reagent which limits the formation of the product.
Excess reagent is the reagent which is present in excess in a chemical reaction.
For the combustion of acetylene, the reaction follows:
By Stoichiometry,
5 moles of oxygen gas reacts with 2 moles of acetylene.
So, 81 moles of oxygen gas will react with = = 32.4 moles of acetylene.
As, the required amount of acetylene is less than the given amount. So, it is considered as an excess reagent and oxygen gas is the limiting reagent.
Answer:
Oxygen is the limiting reactant of this reaction.
Explanation:
2 moles of acetylene reacts with 5 moles of oxygen.
Then 37 moles of acetylene will react with :
of oxygen gas.
But only 81 moles of oxygen gas is present.
Then 81.0 moles of oxygen gas will react with:
of acetylene.
And still acetylene will remain after.
So, from the above calculation we cans see that oxygen is present in limiting amount which will limit the reaction.Hence, the limiting reactant of this reaction is oxygen.
(2) increases
(3) remains the same
Answers
An electron in an atom moves from a ground state to an excited state when the electron energy increases
Further Explanation
Excitation in physics is the addition of a number of discrete energies (called excitation energies) to a system — such as the nucleus of an atom, atom, or molecule — so as to produce a change, usually from the lowest energy state (ground state) to one of the higher energies (excited state).
In nuclear, atomic and molecular systems, excited states do not continue to be distributed but instead have certain discrete energy values. Thus, external energy (excitation energy) can be absorbed in discrete quantities.
Excitation energy is stored in excited atoms and the nucleus that emits light is usually seen from atoms and as gamma radiation from the nucleus because they return to the ground state. This energy can also be lost by collisions.
In the nucleus, energy is absorbed by protons and neutrons which are transferred to an excited state. Within a molecule, energy is absorbed not only by electrons, which are very enthusiastic for higher energy levels but also by whole molecules, which are highly excited for the discrete states of vibration and rotation.
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Electron moves brainly.com/question/496960
Excitation brainly.com/question/496960
Details
Class: High School
Subject: Chemistry
Keywords: electron, excitation, energies
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Answers
So, having this in mind, 10 electrons in total can be contained in the 4d sublevel.
b. The water transfers heat within the pot by convection.
c. Water cannot be heated by electromagnetic radiation.
d. Metal is a poor conductor of heat.
Answers
The statement which explains why the student's idea is incorrect is that conduction cannot occur between two different phases of matter.
What is Conduction?
This involves the transfer of energy between two substances when they are in contact with one another.
The heat from the stove is first passed to the pot before it is transferred to the water hence option A was chosen.
Read more about Conduction here brainly.com/question/893656
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When a pot of water sits on a hot stove, the metal pot is heated, and then transfers its heat to the water. A student claims that conduction is the only type of heat transfer occurring. The statement that explains why the student’s idea is incorrect Conduction cannot occur between two different phases of matter. The answer is letter A.
B. Electron pairs repelling each other push atoms apart
C. Valence electrons modify core electron orbitals
D. Intermolecular forces distort electron bonds
Answers
Answer:
B. Electron pairs repelling each other push atoms apart
Explanation:
The VESPR theory explains molecular shape by suggesting that electron pairs repelling each other push atoms apart.
If an atom is bonded to two or more other kinds of atoms as in many covalent molecules and ions, the shape of the system is determined by the geometry of the bonds around the central atom.
- The variations in the bond angles of such molecules is explained by the valence shell electron pair repulsion theory.
- All the electrons will orient themselves in such a way to minimize the electrostatic repulsion between them.
- The repulsions determines the geometry of the covalent bonds around the central atom.