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3 years ago

Classify each of the following substances:

Chemistry

1 answer:

Keith_Richards [23]3 years ago

5 0

Explanation:

Carbon dioxide is a polar molecule whose positive center is on the carbon atom: This positive center is able to attract (and accept) the lone electron pairs present on the oxide ion (O2-). carbon dioxide is acts as a Lewis acid

A Lewis acid can accept a pair of electrons from a Lewis base. The boron in BF3 is electron poor and has an empty orbital, so it can accept a pair of electrons, making it a Lewis acid. A Lewis acid is defined as an electron-pair acceptor.

In CO molecule, there is a lone pair on both carbon and oxygen. The substance which can donate an electron pair are called Lewis base. It is clear that CO molecule can donate an electron pair and hence, it is a Lewis base. Also, CO can be BOTH a Lewis acid and base.

Oxygen is a Lewis base (that too a weak one), not a Lewis acid. REASON: It has lone pair of electrons, which can be donated to electron-deficient species (Lewis acids).

Methane is Neither a Lewis Acid or Lewis Base.

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What is the major cause of erosion and weathering that affects coastline features?

Arisa [49]

Answer:

Image result for What is the major cause of erosion and weathering that affects coastline features?

Coastal erosion, which is the wearing away of coastal land or beaches, is mainly caused by the impact of waves along the shoreline. This is accentuated during storms when waves are large and crash on shore with a lot of energy. ... As the sand and rocks crash into the coast, they grind away land and rock.

Explanation:

7 0

4 years ago

Someone help please :)

zlopas [31]

6.79 x 10⁶

<h3>Further explanation </h3>

Scientific Notation consists of 2 parts

1. the first part: the first digit followed by the decimal point

2. The second part: the power of 10 (the exponents).which shows the number of digits after the decimal point

To add/subtract, the exponents must be the same and then add/subtract the coefficient

convert the largest exponent

$\tt 7.2\times 10^6\rightarrow 72\times 10^5$

subtract the coefficients

$\tt =(72-4.1)\times 10^5\\\\=67.9\times 10^5\rightarrow 6.79\times 10^6$

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3 years ago

What does relative abundance mean

fgiga [73]

Relative species abundance is a component of biodiversity and refers to how common or rare a species is relative to other species in a defined location or community. Relative abundance is the percent composition of an organism of a particular kind relative to the total number of organisms in the area.

I don't know if your looking for this exact definition so i'm sorry if i'm wrong

4 0

3 years ago

7. DNA is essential to living organisms because it O is a spiral helix can prevent disease O carries the genetic code O can brea

dsp73

Answer: DNA is essential...because it carries the genetic code.

Explanation:

Although the other statements are true about DNA, it's a spiral helix and can break apart, its main function is that it contains the genetic code for organisms.

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3 years ago

Write the general electron configuration of a transition element(a) in Period 5;

atroni [7]

Electron configurations of transition elements in Period 5:

Y Yttrium [Kr] 4d1 5s2

Zr Zirconium [Kr] 4d2 5s2

Nb Niobium [Kr] 4d4 5s1 (*)

Mo Molybdenum [Kr] 4d5 5s1 (*)

Tc Technetium [Kr] 4d5 5s2

Ru Ruthenium [Kr] 4d7 5s1 (*)

Rh Rhodium [Kr] 4d8 5s1 (*)

Pd Palladium [Kr] 4d10 (*)

Ag Silver [Kr] 4d10 5s1 (*)

Cd Cadmium [Kr] 4d10 5s2

What are transition elements?

The transition elements or transition metals occupy the short columns in the center of the periodic table, between Group 2A and Group 3A.
They are sometimes called the d-block elements, since in this region the d-orbitals are being filled in, and are also referred to as B-group elements since in most numbering systems of the columns on the periodic table the numerals of these groups are followed by the letter B.

What are period 5 transition elements?

The period 5 transition metals are yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), and cadmium (Cd).

To know more about transition elements, refer:

brainly.com/question/2426896

#SPJ4

7 0

2 years ago