Which of the following molecules nonpolar?

Redox is a type of chemical reaction in which the oxidation states of atoms are changed. Redox reactions are characterized by the actual or formal transfer of electrons between chemical species, most often with one species undergoing oxidation while another species undergoes reduction. The chemical species from which the electron is removed is said to have been oxidized, while the chemical species to which the electron is added is said to have been reduced.
Transcription is the process of copying a segment of DNA into RNA. The segments of DNA transcribed into RNA molecules that can encode proteins are said to produce messenger RNA. Other segments of DNA are copied into RNA molecules called non-coding RNAS. Averaged over multiple cell types in a given tissue, the quantity of MRNA is more than 10 times the quantity of ncRNA.
Chelation is a type of bonding of ions and molecules to metal ions. It involves the formation or presence of two or more separate coordinate bonds between a polydentate ligand and a single central atom. These ligands are called chelants, chelators, chelating agents, or sequestering agents. They are usually organic compounds, but this is not a necessity, as in the case of zinc and its use as a maintenance therapy to prevent the absorption of copper in people
Catalysis is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst. Catalysts are not consumed in the reaction and remain unchanged after it. Often only very small amounts of catalyst are required. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product, in the process regenerating the catalyst.

3 0

3 years ago

Bromine has two naturally occurring isotopes. Bromine-79 has a mass of 78.918 amu and is 50.69% abundant. Using the atomic mass

dsp73

Explanation:

Given parameters:

Mass of Br-79 = 78.918 amu

Abundance = 50.69%

Unknown:

Mass of Br - 81 = ?

Solution:

Relative Atomic mass of Br = 80

The proportion by which each fraction of an isotope occurs in nature is called the geonormal abundance.

RAM = Ma Ba + McBc

The formula above is used to find the average mass of the given isotopes.

Since we know the percentage abundance of Br-79, that of Br-81 = 100-50.69= 49.31%

RAM = Ma Ba + McBc

RAM = relative atomic mass

Ma Ba = mass and abundance of Br-79

McBc = mass and abundance of Br-81

80 = (78.918 x $\frac{50.69}{100}$ ) + ( $\frac{49.31}{100}$ x C)

80 = 40 + 0.49C

0.49C = 40

C = $\frac{40}{0.49}$ = 81.63amu

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6 0

3 years ago