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Mumz [18]
2 years ago
7

Two students are given different samples of a substance and are instructed to determine the properties of the substance. Which s

tatement describes a property that will be the same for both students?
-color because it is an extensive property
-mass because it is an extensive property
-boiling point because it is an intensive property
-volume because it is an intensive property
Chemistry
2 answers:
olga_2 [115]2 years ago
8 0
Mass because it is an extensive property
Art [367]2 years ago
5 0

Answer : The correct option, mass because it is an extensive property.

Explanation :

Extensive property : It is a type of property that depends on the amount of the substance. For example : mass and volume.

Intensive property : It is a type of property that don not depends on the amount of the substance. For example : density, boiling point, pressure and color.

Hence, from the given statements the correct statement is, the mass because it is an extensive property.

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Use enthalpies of formation given in appendix c to calculate δh for the reaction br2(g)→2br(g), and use this value to estimate t
Contact [7]

Given reaction represents dissociation of bromine gas to form bromine atoms

Br2(g) ↔ 2Br(g)

The enthalpy of the above reaction is given as:

ΔH = ∑n(products)ΔH^{0}f(products) - ∑n(reactants)ΔH^{0}f(reactants)

where n = number of moles

ΔH^{0}f= enthalpy of formation

ΔH = [2*ΔH(Br(g)) - ΔH(Br2(g))] = 2*111.9 - 30.9 = 192.9 kJ/mol

Thus, enthalpy of dissociation is the bond energy of Br-Br = 192.9 kJ/mol

3 0
2 years ago
Glucose and amino acids are reabsorbed from the glomerular filtrate by the __________.
AleksandrR [38]

Answer:

Amino acids, along with glucose, are reabsorbed in the glomerular system with a passive or active mechanism as the fluid travels through the entire renal tubular system and enters the circulation again.

Active mechanisms are those that require expenditure of energy, that is, expenditure of the energy currency, while the passive ones do not, they occur through spontaneous non-energy processes such as osmosis, the osmotic gradient and the difference in concentrations in different compartments.

Explanation:

Glomerular filtration is the regulator of the excretion of metabolites and toxic molecules or not necessary for our body. That is why if the amino acid values ​​are high as well as those of glucose in urine, we will be facing a pathology.

If glucose is increased, it is because there is a glycemic peak in blood volume, hence possible diabetes.

And if the amino acids are increased, we could be facing an autoimmune or proteolytic pathology where a large amount of body proteins such as muscle proteins would be breaking down and releasing the amino acids that make it up, this phenomenon usually appears in those people who suffer from rhabdomyolysis in expenses very intense energy sources not appropriate.

On the other hand, glomerular filtration occurs in the kidney and is carried out by the nephron, which is the functional unit of the kidney, within it there is a specific tubular system in collection, absorption and reabsorption, added to the presence of Bowman's capsule.

5 0
2 years ago
Which of the following are elements, which are molecules but not compounds, which are compounds but not molecules, and which are
andreev551 [17]

Explanation:

Molecules of compounds are are compounds composed two or more than two different elements.

Molecules of an elements are made up two or more than two numbers of same type of atoms

(a) SO_2

It is compound composed of sulfur and oxygen element.

(b) S_8

It is a molecules of a single element made up of 8 sulfur atoms.

(c) Cs

It is a symbol of an element named cesium.

(d) N_2O_5

It is compound composed of nitrogen and oxygen element.

(e) O

It is a symbol of an element named oxygen.

(f) O_2

It is a molecule of a single element made up of 2 oxygen atoms.

(g) O_3

It is a molecule of a single element made up of 3 oxygen atoms.

(h)CH_4

It is compound composed of carbon and hydrogen element.

(i) KBr

It is compound composed of potassium and bromine element.

(j) S

It is a symbol of an element named sulfur.

(k) P_4

It is a molecule of a single element made up of 4 phosphorus atoms.

(l) LiF

It is compound composed of lithium and fluorine element.

4 0
2 years ago
Read 2 more answers
What volume of 0.550 M KBr solution can you make from 100.0 mL of 2.50 M KBr?
Lostsunrise [7]
M1V1 = M2V2
(2.50)(100.0) = (0.550)V2
V2 = 455mL

You can make 455mL of 0.550M solution from 100.0mL of 2.50M solution.
5 0
2 years ago
Read 2 more answers
True or false, The atomic number of an element is a whole number that decreases as you read across each row of
torisob [31]

Answer:

I believe it's false because the atomic number is the number of protons in the nucleus of an atom.

5 0
1 year ago
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