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3 years ago

Which of these statements describes a chemical property

Chemistry

2 answers:

sp2606 [1]3 years ago

7 0

Sugar burns in air describes a chemical property

<h3>Further explanation </h3>

In the matter of a substance, there is a process of change.

2 changes occur in the mater, namely: physical changes and chemical changes

Classification uses the principle of the initial and final state of the substance.

Physical changes are changes in the matter which in the process do not cause new substances. So the properties of the particles remain the same.

Generally, the physical changes that occur are changes in shape / size and changes due to heating, or changes in volume

Example:

melting

a solid changes to a liquid

freezing

a liquid changes to a solid

boiling

a solid changes to a liquid

Chemical changes are changes in the process that produce new substances that are different from the initial / forming substances. Chemical changes are usually known as chemical reactions. So there are products / reactions and reactants

So in chemical changes, there is a change in the molecule / particle

From this we can know the physical and chemical properties of a substance

physical properties:

melting point, viscosity, ductile, freezing point, boiling point, density, odor, solubilty, turbidity, color etc.

chemical properties:

Highly flammable, corroded, explosive, toxic etc.

Let's look at the answer choices in the attached picture

1. water boils at 100 C

physical properties of water that is boiling point

2. mercury is liquid at room temperature

physical properties: the form of substances

3. Helium is the lightest monoatomic element

physical properties: the weight or mass of a substance

4. sugar burns in water to form water and carbon dioxide

chemical properties: the formation of new substances

<h3>Learn more </h3>

an example of a physical change

brainly.com/question/1119909

example of a chemical change brainly.com/question/9388643

examples of chemical changes brainly.com/question/11189422

grin007 [14]3 years ago

5 0

Well...you wrote which of these but which of these are you showing exactly Lol Imma still help you tho some chemical properties are described as : Odor, density, melting point and boiling point toxicity.

-Oxidation.

-Flammability.

-Heat of combustion.

-Enthalpy of formation.

And :

Radioactivity.

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The average lung capacity of a human is 6.0L.

Darya [45]

Answer:

(a) 0.25 mol

(b) 0.11 mol

Explanation:

(a)

We use the equation given by ideal gas which follows:

$PV=nRT$

where,

P = pressure of the gas = 1.00 atm

V = Volume of the gas = 6.0 L

T = Temperature of the gas = 298 K

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

n = number of moles = ?

Putting values in above equation, we get:

$1.00 atm\times 6.0L=n\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 298K\\\\n=\frac{1.00\times 6.0}{0.0821\times 298}=0.25mol$

(b)

We use the equation given by ideal gas which follows:

$PV=nRT$

where,

P = pressure of the gas = 0.296 atm

V = Volume of the gas = 6.0 L

T = Temperature of the gas = 200 K

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

n = number of moles = ?

Putting values in above equation, we get:

$0.296 atm\times 6.0L=n\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 200K\\\\n=\frac{0.296\times 6.0}{0.0821\times 200}=0.11mol$

(c)

We use the equation given by ideal gas which follows:

$PV=nRT$

where,

P = pressure of the gas = 30 atm

V = Volume of the gas = 6.0 L

T = Temperature of the gas = 250 K

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

n = number of moles = ?

Putting values in above equation, we get:

$30 atm\times 6.0L=n\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 250K\\\\n=\frac{30\times 6.0}{0.0821\times 250}=8.77mol$

8 0

3 years ago

What does the model represent

Alona [7]

The model represents Photosynthesis. Light, carbon dioxide, and water are the reactants. The products will be Sugar and Oxygen. Photosynthesis releases oxygen and glucose. Which is the energy that living things need to survive.

6 0

3 years ago

At the fifth trophic level would be consumers that eat consumers

steposvetlana [31]

I honestly dont know look at the guy above me answer

7 0

3 years ago

Which wave is carrying the most energy? A wave with large amplitude. A wave with very large amplitude. A wave with small amplitu

tankabanditka [31]

Answer:

A wave with small amplitude.

Explanation:

Amplitude us inversely proportional to energy so the smaller the amplitude, the higher the energy.

Hope it helps.

4 0

3 years ago

Which of the following statements is true?

Andre45 [30]

"The heat of fusion for a substance is the energy required to change from the vapor to plasma phase."

This I do belive is the answer to the question.

hope it helps.

5 0

3 years ago