#8 please explain if you can
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Answers

Answer 1

Answer: The answer is D because the air is made of nitrogen and oxygen. The reaction is endothermic.
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The reaction of p-aminophenol with one mole of actyl chloride in presence of pyridine gives:

Consider the
solubility curve at
right. Which
material is a
gaseous solute?

Answers

Answer:

Substance A

Explanation:

See attached worksheet,

The solubility of gasses decreases as temperature rises.

What is the chemical formula for mercury(I) nitrate

Answers

Hg(NO3)2
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Which scientist did people think was insane so they dismissed his ideas for almost 2000 years?

Answers

Alfred Wegener

I think let me know if I am wrong

Write these numbers rounded to the three nearest significant figures

Answers

Answer:

(a) 52.2 mL helium

(b) 18.0 g nitrogen

(d) 23,600,000 mm wavelength

(e) 0.00420 kg lead

Rounded the numbers to three nearest significant figures.

Highlights the basic points in lewis and lannngmuir theory of electrovalency

Answers

The correct answer for the question that is being presented above is this one: "Electrovalency is characterized with the transferring of one or more electrons from one atom to another together with the formation of ions and as well as the number of positive and negative charges.

The Lewis and Langmuir theory of electrovalency (and as well as Kossel's) is dealing with Ionic bonds.

Lewis: electron-pair sharing, octet rule, Lewis Symbols or StructureLangmuir: introduced term "covalent" bond, and popularized Lewis's ideas

The Lewis-Langmuir electron-pair or covalent bond is referred as the homopolar bond, where the complete transfer of electrons give rise to ionic, or electrovalent bond (1) through attraction of opposite charges.

How many phosphorus atoms are there in 1.75 mol of calcium phosphate,
Ca3(PO4)2

Answers

There will be two atoms of phosphorus in the 1.75 mol of calcium phosphate.

What are atoms?

Atoms are the smallest unit of matter. In a chemical reaction, the number of atoms shows the quantity of an element in the compound or reaction. Phosphorus is a chemical element that is preset in the periodic table.

In calcium phosphate, Ca3(PO4)2, the number of atoms can be calculated by counting the number of moles that is given in the equation.

The number of atoms of calcium is 3, and the number of phosphorus atoms is 2.

Now given the 1.75 mol of calcium phosphate, so the number of atoms of phosphorus will be the same in any number of moles of calcium phosphate. So there will be 2 atoms of phosphorus in the given equation.

Thus, the number of atoms is two.

To learn more about atoms, refer to the below link:

brainly.com/question/4622631

#SPJ2

Answer:

It has 2 phosphorus atoms in 1 mol

so for 1.75 mol =2×1.75

Explanation:

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