Please help ASAP! I’m lost right now.

Chemistry

1 answer:

SCORPION-xisa [38]3 years ago

3 0

1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^5, 4s^1

Chromium is strange because it moves on to the 4s orbital instead of filling the 3d orbital with that last electron. Tricky.

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Consider two acids: (ch3)3cco2h (pivalic acid, pka = 5.0) and hco2h (formic acid, pka = 3.8). Which acid forms the stronger conj

gulaghasi [49]

Answer:

Pivalic acid forms a strong conjugate base.

Explanation:

Strong acid has weak conjugate base
Weak acid has strong conjugate base

As in this case, pivalic acid is weak acid (Due to electron donating effect of tert. butyl group) having pka value of 5.0 , so its conjugate base will be strong as compare to formic acid which is stronger acid.

Summary:

As pivalic acid is weak acid as compare to formic acid, so its conjugate base will be strong and vice versa.

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How is the partial pressure of a gas in a mixture calculated?

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The total pressure of a mixture of gases can be defined as the sum of the pressures of each individual gas: Ptotal=P1+P2+…+Pn. + P n . The partial pressure of an individual gas is equal to the total pressure multiplied by the mole fraction of that gas.

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What property do the following elements have in common? Li, C, and F

nikklg [1K]

Answer:

They all belong in the same period, thus they have the same energy levels which is 2.

In the periodic table, elements are categorized by group and period. Periods are arranged in rows. Below is a picture of the periodic table and where these elements are.

As you can see, they all belong in the same period (row). Elements in the same period have the same number of atomic orbitals, or in other words, they have the same electron energy level. The period number tells you the energy level. Lithium (Li), Carbon (C), and Fluorine (F) are in period 2, so they all have two energy levels.