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elena-s [515]
3 years ago
9

Sugar dissolving in warm water is chemical or phyiscal change

Chemistry
1 answer:
BlackZzzverrR [31]3 years ago
5 0
Hey there! Great question;) Answer:Physical change Explanation: When sugar mixes with water, at the end, the chemical formulas are the same. Nothing has changed! I hope this helps;)
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What is a major problem with CFCs?
oksian1 [2.3K]

The major problem with CFCs is that It is a greenhouse gas, Option A is correct.

<h3>What are CFC's ?</h3>

Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.

They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.

CFCs are classified as halocarbons, a class of compounds that contain atoms of carbon and halogen atoms

The major problem with CFC's is that they are green house gases

It destroys ozone in the upper atmosphere (stratosphere).

CFCs can produce more than 10,000 times as much warming, pound for pound, once they are in the air.

It is not  only because of their dramatic warming potential  but also  

They were found to be the primary cause of the rapidly escalating destruction of the Earth’s ozone layer,

which protects the planet from dangerous, cancer-causing levels of ultraviolet radiation.

Therefore The major problem with CFCs is that It is a greenhouse gas, Option A is correct.

To know more about CFC'S

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6 0
2 years ago
10 points. Please help.
ratelena [41]

Answer:

-191.7°C

Explanation:

P . V = n . R . T

That's the Ideal Gases Law. It can be useful to solve the question.

We replace data:

2.5 atm . 8 L = 3 mol . 0.082 L.atm/mol.K . T°

(2.5 atm . 8 L) / (3 mol . 0.082 L.atm/mol.K) = T°

T° = 81.3 K

We convert T° from K to C°

81.3K - 273 = -191.7°C

6 0
3 years ago
Read 2 more answers
Find the vapor pressure of a water solution in which the
zheka24 [161]

Answer:

The vapor pressure in solution is 0,0051 atm

Explanation:

This is the formula for vapor pressure lowering, the colligative property.

P vapor = Pressure sv pure . Xsv

Where Xsv is data.

Xsv means Molar fraction (moles solvent/total n° moles)

Vapor pressure of water, pure is 17.5 mmHg

P vapor = 0,0313 atm . 0163

P vapor in solution = 0,0051 atm

Molar fraction does not have units

A solution will have less vapor pressure than that observed in the pure solvent.

5 0
3 years ago
Why N2 has a lower boiling point than CO?
disa [49]
CO HAS A HIGHER BOILING POINT BECAUSE THE INTEMOLECULAR FORCES ARE STRONGER THEN N2 WHICH IS NON POLAR. CO HAS A HIGHE BOILING POINT BECAUSE THE INTEMOLECULAR FORCES ARE STRONGER THEN N2 WHICH IS NON POLAR
7 0
3 years ago
Electron sharing can be depicted by a Lewis dot structure, in which element symbols are surrounded by dots that represent the va
Nina [5.8K]

Answer:

Outermost

Covalent

Two

One

Two

Two

Covalent

One

Explanation:

A covalent bond is formed when an atom shares two electrons with another atom. These shared electrons could be contributed by each of the bonding atoms or by only one of the bonding atoms.

Hydrogen has the electronic configuration of 1s1. This implies that it has only one electron in its valence shell although the 1s shell can accommodate two electrons. When the atomic orbitals of carbon and hydrogen overlap, they share two electrons and hydrogen is now associated with two electrons in a covalent bond.

Since hydrogen possesses only one valence electron, it can not be bonded to two atoms.

4 0
3 years ago
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