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Savatey [412]
2 years ago
7

What is the chemical name for K2Se

Chemistry
2 answers:
german2 years ago
8 0

Answer:

Potassium selenide

Explanation:

Oduvanchick [21]2 years ago
6 0

Answer:

Potassium selenide

Explanation:

Potassium selenide (K2Se)

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Suppose you are trying to separate three Proteins using Gel-Filtration chromatography. The sizes of each are given below:
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<u>Answer:</u> The correct answer is Protein B.

<u>Explanation:</u>

Gel-filtration chromatography is a separation technique that is based on the size of the molecules in a compound. It is also known as size-exclusion chromatography in which the eluent (carrier) used is an aqueous solution.

The matrix that is used is a porous material. When the sample is inserted in the column, the smaller particles interact strongly with the matrix than the large ones. Thus, as the eluent is passed through the matrix, larger molecules come out first, and the smallest molecule comes out last.

Given sizes of the proteins:

Protein A: 1200 kDa

Protein B: 2000 kDa

Protein C: 800 kDa

As protein B has the largest size of all the given proteins, it will emerge out first from the column.

Hence, the correct answer is Protein B.

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What is atomic mass, atomic number, isotopes and how are all these terms related to each other?
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Atomic mass deals with the number of protons and neutrons added together, atomic number deals with protons only, though isotopes can be explained like this, say you had a hydrogen atom it's one proton and one electron if you add a neutron to it, the hydrogen becomes Deuterium which is a isotope of hydrogen it's the same atom just a neutron added to it for a different atomic mass if only slightly changed
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Calculate the mass (in ng) of 2.33 x 1020 atoms of oxygen.
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In which set do all elements tend to form anions in binary ionic compounds? li, na, k n, o, i c, s, pb k, fe, br?
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Atoms or molecule after gaining of electron possesses negative charge and is known as anion.

For the given sets:

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The given elements are non-metals and are electronegative. So, they gain electrons easily and form anion.

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Carbon has tendency to form bond by sharing of electrons, Sulfur has tendency to gain electrons and form anion whereas Lead has tendency to lose electron.

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Potassium and Iron has tendency to lose electron and form cation whereas Bromine has tendency to gain electron to form anion.

Hence, from the given sets, all elements of set: N, O, I have tendency to form anions in binary ionic compounds.

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