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3 years ago

Define physical properties, and give two types of physical properties in your answer. Thx so much!

2 answers:

8 0

Physical properties are measurable physical characteristics of something that are not involved in a chemical change. The changes in the physical properties of a system can be used to describe the way it changes between momentary states. For example, colour, density, melting (and boiling) point, hardness, and electrical conductivity are all physical characteristics.

Elza [17]3 years ago

6 0

Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

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Determine the name of the following compound Fe(OH) 3 , Provide explanation of how you determined the name, including the type o

stepan [7]

Answer:

1. Iron(iii) hydroxide

2. It is a base

Explanation:

To determine the name of the compound, we must find the oxidation number Fe in the compound since the oxidation number of O is —2 in all its compound except for peroxide where it —1 and the oxidation number of Hydrogen is always +1 in all its compounds except for hydrides where it is —1. The oxidation number of Fe can calculated as follows:

Fe(OH)3 = 0

O = —2

H = +1

Fe =?

Fe + 3( —2 + 1) = 0

Fe + 3(—1) = 0

Fe —3 = 0

Fe = 3

The oxidation number of Fe in Fe(OH)3 is 3.

Therefore, the name of Fe(OH)3 is Iron(iii) hydroxide

Fe(OH)3 is a base since it contains the OH group

7 0

4 years ago

Amobarbital sodium react with ethanolic sodium hyrooxide

CaHeK987 [17]

Amobarbital (like all barbiturates) works by being incontestible to the GABAA receptor at either the alpha or the beta subunit.

<h3>What is the mechanism of amobarbital?</h3>

Amobarbital (like all barbiturates) works by binding to the GABAA receptor at either the alpha or the beta subunit. These are compulsory sites that are distinct from GABA itself and also distinct from the benzodiazepine binding site.

Amobarbital is a barbiturate classified as having a halfway duration of action, meaning that the effects of the drug can last from 4-6 amobarbital increases the effects of benazepril by apparatus: pharmacodynamic synergism.

So we can conclude that Amobarbital, 5-ethyl-5-isoamyl barbituric acid like all barbiturates.

Learn more about Amobarbital here: brainly.com/question/7237163

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6 0

2 years ago

How much heat is needed to melt 100.0 grams of ice that is already at 0°C?

Jet001 [13]

Taking into account the definition of calorimetry and latent heat, the heat needed to melt 100.0 grams of ice that is already at 0°C is 33,400 J (option A).

<h3>Calorimetry</h3>

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

<h3>Latent heat</h3>

Latent heat is defined as the energy required by a quantity of substance to change state.

When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.

In this case, the heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to

Q = m×L

where L is called the latent heat of the substance and depends on the type of phase change.

<h3>Heat needed to melt ice</h3>

In this case, you have to melt the ice into liquid water.Being the specific heat of melting of ice is 334 J/g, the heat needed to melt 100 grams of ice is calculated as:

Q= 100 grams× 334 J/g

Solving:

In summary, the heat needed to melt 100.0 grams of ice that is already at 0°C is 33,400 J (option A).

Learn more about calorimetry:

brainly.com/question/15224761

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4 0

1 year ago

The exchange of carbon dioxide and oxygen takes place in the lungs. The specific site of gas exchange is the _____.

laila [671]

Alveoli. I don't know what a nephron is but neurons and synapses are in the brain.

5 0

4 years ago

Read 2 more answers

Find A, B, and C

Lynna [10]

Electrons = protons
protons = atomic number
protons + neutrons = atomic mass

Therefore: a) protons + 7 = 15
protons= 15 -7
protons= 8

B) Remember proton = atomic number
so atomic number = 8

C)Now we know the atomic number so we can easily check on the periodic table what element has an atomic number of 8, which is Oxygen

8 0

3 years ago