Answer:
1 and 4 and 24
Explanation:
I know this because i passed 1st grade
Answer:
0.01M
Explanation:
Given paramters:
Volume of FeCl₂ = ?
Concentration = 0.945M
Number of molecules of O₂ = 4.32 x 10²¹molecules
Solution:
The balanced reaction equation is given below:
4FeCl₂ + 3O₂ → 2Fe₂O₃ + 4Cl₂
Now, to solve the problem we use mole relationship between the compounds.
We work from the known to the unknown compounds. Here, the known is the oxygen gas because from the given parameters we can estimate the number of moles of the reacting gas.
number of moles of O₂ =
number of moles of O₂ =
number of moles of O₂ = 0.007mole
now, from the reaction equation we find the number of moles of the FeCl₂:
3 mole of O₂ reacted with 4 moles of FeCl₂
0.007mole of O₂ reacted with = 0.0096mole O₂
Now to find the volume of FeCl₂ we use the expression below;
volume of FeCl₂ =
=
= 0.01L
Answer:
When hydrogen reacts with chlorine, hydrogen chloride is formed. Hydrogen chloride is a gas, and has the formula HCl(g).
When hydrogen chloride dissolves in water, hydrochloric acid is formed. This has the same formula, but you can tell the difference because of the state symbol (aq), which stands for ‘aqueous’. The formula is written as HCl(aq).
Hydrogen chloride is made from molecules. The hydrogen atom and the chlorine atom are joined by a covalent bond. When hydrogen chloride forms hydrochloric acid, the molecules split into ions.
HCl(aq) → H+(aq) + Cl-(aq)
The H+ ions make this aqueous solution acidic. The solution also conducts electricity because it contains ions that are free to move.
However, when hydrogen chloride gas dissolves in a solvent called methylbenzene, the molecules do not split up. A solution of HCl in methylbenzene does not contain hydrogen ions, so it is not acidic. The solution also has a low electrical conductivity.
Answer: Four fragments with Ala-Leu as residues
Explanation:
A protein is a word that describes any of numerous large, complex naturally-produced molecules composed of one or more long chains of amino acids (also called Polypeptide) in which the amino acid groups are held together by peptide bonds.
Long peptides making up a can be cut into smaller fragments by using certain chemical reagents or enzymes that cuts it at specific sites leaving amino acid residues. Proteolytic enzyme too can be used to cleave peptides in a process called proteolysis. Example of such enzyme is Trypsin and it makes cut at the carboxyl group of arginine and lysine unless its followed by proline.
One of such chemical reagent as mentioned above include the Cyanogen Bromide written as CNBr that cleaves proteins after methionine (Met) side chains.
This chemical usually cleave the amino acid methionine at the carboxyl terminal.
From the above protein sequence using CNBr the number of peptide fragments formed after cleaving with cyanogen bromide is 4.
Asp-Ser-Arg-Leu-Ser-Lys-Thr-Met;
Tyr-Ser-Ile-Glu-Ala-Pro-Ala-Lys-Leu-Asp-Trp-Glu-Gln-Asn-Met ;
Ala-Leu Asp-Ser-Arg-Leu-Ser-Lys-Thr-Met;
Tyr-Ser-Ile-Glu-Ala-Pro-Ala-Lys-Leu-Asp-Trp-Glu-Gln-Asn-Met;
With Ala-Leu as residues.
Proteolysis simply involve the hydrolysis of proteins into peptides and amino acids; in this context but especially as part of the digestion of food.
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