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2 years ago

Which of the following pairs does not share the same empirical formula?

2 answers:

8 0

The correct answer is $PbCl_2$ and $PbCl_4$ . If you divide all atoms of $PbCl_4$ by factor 4 it gives $PbCl$ which is not the same as $PbCl_2$ .

If you divide all atoms of $C_3H_6O_3$ by 3 you get the other pair $CH_2O$

If you divide all atoms of $N_2O_4$ by 4 you get the other pair $NO_2$

and if you divide all atoms of $C_3H_1_2$ by 3 you get the other pair $CH_4$

Svetradugi [14.3K]2 years ago

5 0

PbCl2 and PbCl4

Empirical formula is when the molecular formula is reduced (each element) by the same number until you are unable to do so any further.
CH2O cannot be further reduced, but C3H6O3 can all be divided by 3 making it CH2O (same empirical formula)

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Large sandbars along the coastline that form from deposition of

olga55 [171]

Barrier island refers to the large sandbars along the coastline that form

from deposition of sand over long period of time.

<h3>Features of a Sandy environment </h3>

The features of a sandy environment include the following:

Spits

Barrier islands

Tombolos

Barrier Island are formed when sand is deposited over a long time and this

helps to prevent erosion along the coastline area.

Read more about Barrier Island here brainly.com/question/15750467

3 0

1 year ago

A limestone plateau has no surface water. All the water is pulled underground through cracks and crevices in the surface. What m

BaLLatris [955]

Answer:

Chemical weathering due to water

Explanation:

Since all the water is pulled underground through cracks and crevices on the surface, it makes the limestone plateau have no surface water. Meanig the most likely cause for having the underground of the plateau to change over time is the chemical weathering due to water.

7 0

3 years ago

Element that has two isotopes has an average atomic mass of 199.7. if 75.56% of the atoms of the element have an atomic mass of

Klio2033 [76]

I just learned this myself and it was sort of confusing to me. Inbox me and I'll do my best to explain it.

5 0

3 years ago

A nonvolatile solute is dissolved in benzene so that it has a mole fraction of 0.139. What is the vapor pressure of the solution

lapo4ka [179]

Answer:

The vapor pressure of the solution is 3.69 torr

Explanation:

Step 1: Data given

Mole fraction of benzene in the solution = 0.139

P° of benzene is 26.5 torr

Step 2: Calculate the vapor pressure of the solution

Psolution = Xbenzene * P°benzene

⇒with Psolution = the vapor pressure of the solution

⇒with Xbenzene = the mole fraction of benzene = 0.139

⇒with P°benzene = the vapor pressure of pure benzene = 26.5 torr

Psolution = 0.139 * 26.5 torr

Psolution = 3.69 torr

The vapor pressure of the solution is 3.69 torr

7 0

2 years ago

What is the acronym for DNA??

victus00 [196]

The acronym 'DNA' stands for deoxyribonucleic acid.

DNA is used to 'code' the genetic makeup of all living organisms, and is found inside the nucleus of the cell(Eukaryotes) or just floating in the cytoplasm of the cell(Prokaryotes). DNA is made up of 4 different pairs of base molecules(nucleotides) that are slightly different from another. The similar molecule structure RNA(ribonucleic acid) differs from DNA in that RNA nucleotides are just slightly different from the nucleotides of DNA. This difference is that RNA nucleotides have a hydroxide group(OH) where the DNA nucleotides just have a hydrogen atom.
Because the DNA nucleotide doesn't have the hydroxide group it has one less oxygen than RNA nucleotides do. This is where DNA derives the prefix "deoxy-," meaning "without oxygen."
The prefix "ribo-" is given to molecules with a certain configuration of a set of 3 consecutive but not necessarily contiguous CHOH(asymmetric) groups.
The combined form "nucleo-" is used to imply something that has to do with the nucleus, such as the nucleus of a cell where DNA is stored in Eukaryotes.
And finally, the ending of the acronym: "acid." DNA is an acid because the 4 nucleotides each contain a phosphate group, which are acidic.

And thus, we get our answer: deoxyribonucleic acid, and the meaning:
deoxy-ribo-nucleic acid
(without oxygen) + (has 3 CHOH groups) + (in/of the nucleus) + (acidic)
Thus, DNA is a molecule is basically an acidic molecule residing in the nucleus with 3 CHOH groups and is missing oxygen atoms.

I know this isn't really what you're looking for, but honestly I had a great time doing a little research into the name!

Hope this explains it a little! c;

5 0

2 years ago