The following reaction shows the process of rusting. 4Fe + 3O2 2Fe2O3 This chemical reaction should be classified as _____.
Answers
Answer: Synthesis reaction
Explanation:
Corrosion is the process of slow eating away of metal due to attack of atmospheric gases on the surface of metal resulting into formation of compounds such as oxides, sulfides , carbonates etc is called as corrosion.
Corrosion of iron is called as rusting. Rust is hydrated ferric oxide .
Synthesis reaction is a chemical reaction in which two reactants are combining to form one product.
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The electric pencil sharpener in Mrs. Brown's classroom gets very warm on days when many students need to sharpen their pencils.Choose the form of energy to fill in the blank in the energy conversion diagram below.Electrical Energy ____________________ Heat EnergyLight EnergyMechanical EnergyNuclear EnergyChemical Energy
The nitrogen cycle is completed with the process of what ?
Answers
If 1/16 of the sample remains it means that there were 4 half-life periods (16=2⁴)
4 half-life periods = 48 hours /4
half-life period = 12 hours
Hope it helped :)
The radioisotope is an unstable chemical element. The half-life of the radioisotope after decaying for 48 hours is 12 hours.
What is half-life?
Half-life is a period taken by the radioisotope to get decayed by half the original amount. The half-life is the time that is needed by the reactant to get decreased and form the product.
If the sample remained is 1/16 then there are 4 half-life periods present.
4 half life = 48 hours ÷ 4
= 12 hours
Therefore, 12 hours is the half-life period.
Learn more about half-life here:
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Only Student A
Only Student B
Both Student A and Student B
Neither Student A nor Student B
Answers
Answer : The correct option is, Only Student B
Explanation :
Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.
In the Lewis-dot structure the valance electrons are shown by 'dot'.
The given molecule is,
As we know that nitrogen has '5' valence electrons and hydrogen has '1' valence electron.
Therefore, the total number of valence electrons in = 5 + 3(1) = 8
According to Lewis-dot structure, there are 6 number of bonding electrons and 2 number of non-bonding electrons.
The Lewis dot structure of student A is wrong because there is a coordinate bond present between the nitrogen and hydrogen is not covalent.
The correct Lewis-dot structure of is shown by the student B.
Answer:
niether of them
Explanation:
the rest are bs
It provides energy for the reaction.
It is released by the reaction.
It catalyzes the reaction.
PLEASE EXPLAIN YOUR ANSWER
Answers
Answer:
- First choice: it provides energy for the reaction.
Explanation:
Alkanes are relative stable molecules: saturated chains of carbon and hydrogen atoms, where each carbon atom is hydridized sp³ and is bonded to one or two carbon atoms and 2 or 3 hydrogen atoms.
The C-H bonds are slightly polar (carbon is more electronegative than oxygen).
On the other hand, the diatomic halogen molecule (F₂, Cl₂, Br₂, or I₂) is a non-polar molecule.
The mechanism of reaction between the alkane and the halogen is via free radicals: the halogen molecule must be splitted into two radicals (two atoms each with a free electron). This implies the rupture of the diatomic halogen, and this requires an important amount of energy. The role of the UV ligth is to provide the energy to split the halogen molecule and, in this way, start the reaction.
Then, the free halogen radical may react with the alkane molecule breaking a C - H bond and substituting the leaving hydrogen atom, forming a C - X bond (X represents the halogen atom).
As a demonstration of this role, you may find in the specialized textbooks this typical reaction:
- CH₄ + Cl₂ + energy → CH₃Cl + HCl
The energy shown in the reactant side may be supplied as UV light or heat. So, the role of UV light is to provide energy to start the reaction.
Answer:
It provides energy for the reaction.
Explanation: gradpoint
Answers
Answer:
The dose of Elixophyllin for a person of 160 lb is 436.36 mg.
Explanation:
First you have to go from pounds to kilograms. 160 lb x 1kg/2.2lb = 72.73 kg.
Then you have to multiply the dosage by the body mass in kilograms.
(6 mg/kg) x 72.73 kg ⇒ 436.36 mg.
Answers
Answers
Ionic bond is formed when there is a transfer of electron(s) from metallic atom to non-metallic atom.
The correct answer to the question is Option B. A bond resulting from the transfer of 1 or more electrons
Ionic bond exist between a metal and a nonmetal.
In this bonding, the metal losses it's valence electron to form a stable metallic ion, while the nonmetal receives the electron from the metal to form a stable nonmetallic ion which results in the formation of an ionic compound.
With the above information, we can see that ionic bond involves a transfer of electron(s).
Thus, the correct answer to the question is Option B. A bond resulting from the transfer of 1 or more electrons.
See attachment image
Lean more: brainly.com/question/11527546
Answer: B
Explanation:
Ionic bonding is the complete transfer of electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.