at 25°c the heat of fusion of aluminum is 10.6 kj/mol and the heat of sublimation is 326.4 kj/mol. what is the heat of vaporization of aluminum at 25°c?

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The balanced chemical equation for given reaction is ~

Answer:

Gunpowder was discovered somewhat inadvertently by Chinese alchemists, who were trying to develop an elixir of immortality. If you're not aware, there are three primary components to gunpowder: saltpeter (potassium nitrate), sulfur, and charcoal. ... The use of sulfur by the Chinese is also ancient.

Explanation:

This problem is asking for the reason behind the nonexistence of elementary substances with ionic bonds. First of all, it is necessary to bear to mind that the definition of the type of bond in a compound depends on the difference electronegativity that is present between two of the atoms composing it.

For instance, in binary salts, such as KCl, NaCl, KBr and so on, we are able to know these are all ionic because they are composed by a metal and a nonmetal, which have the smallest and largest electronegativities, so that the difference electronegativity is large enough to produce an ionic bond.

In contrast, elementary susbtances, such as liquid bromine (Br2) and gases such as H2, N2, Cl2, F2 and O2, since they are all nonmetals and the same type, the electronegativity difference will be 0 and therefore, they will not be ionic but covalent.

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multiply your temp change by 12

hope this helps!

Answer:

Carbonic anhydrase and they are located in renal tubules.

Explanation:

Answer:

If a solute is a solid or liquid, increasing the temperature increases its solubility. For example, more sugar can dissolve in hot water than in cold water. If a solute is a gas, increasing the temperature decreases its solubility. For example, less carbon dioxide can dissolve in warm water than in cold water.

Explanation:

Answer:

The formula for ammonium is NH₄⁺

Answer:

Ans B)=====> Dorsal Horn

Two arms, each known as a Dorsal Horn, are formed by the core grey matter at the back of the spinal cord. In the image, the region labeled “ A “ is called the Dorsal Horn. Therefore, option B is correct.

One of the gray longitudinal columns discovered inside the spinal cord is the dorsal horn. Through the dorsal roots of the spinal nerves, it predominantly serves as the end of primary afferent fibers.

A complex network of excitatory and inhibitory interneurons, as well as projection neurons, make up the dorsal horn, which serves as an intermediary processing center for this information. It transmits the processed somatosensory information from the spinal cord to the brain.

The cell bodies of sensory neurons are located in the dorsal horns. The ventral horns are two arms of central grey matter that are found at the front of the spinal cord.

Thus, option B is correct.

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Answer:

Remove a H2 molecule from the left side of the equation.

Explanation:

i took the quiz and got it right

Answer:

Archaeology is the study of the human past using material remains. These remains can be any objects that people created, modified, or used.

Explanation:

This problem is providing information about the loss of mass for a reaction 50 °C as a function of the time elapse. Thus, when taking a look at the given graph, we can trace a horizontal line on the y-axis at 0.95 g in order to intercept it with the curve, and hence, figure out the time at which that loss of mass takes place.

Thus, we can see that when the loss of mass hits 0.95 g, the corresponding time on the graph is about 80 seconds, and hence, the rate of reaction turns out to be:

[tex]r=\frac{0.95g}{80s}\\\\r=0.012\frac{g}{s}[/tex]

Which has two significant figures as required.

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Answer:

Anything that occupies space and has mass is matter but the matter that has specific composition and chemical characteristics is substance

Answer:

Substance: Something that has only 1 atom, for example; Water.

Matter: Made up of more than 1 atom, example; Humans

Explanation:

As said a substance is something that has only 1 atom like water or tin.

Matter is well almost everything in the universe, there's a reason some people say; This is Human Matter. I'm pretty sure it's somewhere in the bible too.

If you were to search it up the other persons answer would come up

Answer:

Answer)   The first box represent the budding type of asexual reproduction . In budding due to the cell divison at the particular place in the organism , new  individual will produced.

Second picture represent the budding in hydra. Budding is also a asexual reproduction.

Third type of asexual reproduction is found in plants  it is vegetative reproduction.

Fourth is Binary fission . This is also a type of asexual reproduction, in which nucleus dicied into two new daughter cell via mitosis.Explanation:

Answer:

solute is coffee solvent is the cream or sugar or milk

Answer:

A. evaporation

Explanation:

Answer:

This process is called (A) evaporation.

I hope this helped at all.

Answer:

Relation between AMU and Gram

The mass of an atom in amu is numerically the same as the mass of one mole of atoms of the element in grams. One atom of sulfur has a mass of 32.07 amu; one mole of S atoms has a mass of 32.07 g. For compounds, the molecular mass (in amu) is numerically the same as the mass of one mole of the compound in grams.

Explanation:

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The rearrangement produces a more stable tertiary carbocation and the unexpected product.

In the image shown, the substrate is 1-cyclobutylethene. The attack of H2SO4 and water will lead to the conversion of the alkene to an alkanol. Two possible products may be obtained with one being greater than the other.

The unexpected product (Shown in the image attached) is obtained due to rearrangement of the carbocation intermediate. The rearrangement produces a more stable tertiary carbocation and the unexpected product.

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Answer:

the answer is Crystal structures

Answer:

The answer is B: main-group elements.

Explanation:

Answer:

b

Explanation:

Answer:

A) 17.5%

B) 1) 2135 kg

2) 375 kg

C) 91.8

Explanation:

Part (A):

1 tonne= 1000 kg= 100%

Aluminium oxide= 825 kg= 82.5%

Iron (lll) oxide= 100 kg= 10%

Sand= 85 kg= 7.5%

That makes total of 100%

So, the percentage of impurities= Iron (lll) oxide + Sand

=> 10 + 7.5= 17.5%

Part (B):

(1) 1 tonne= 427 kg

Multiplying both sides by 5

=> 5 tonne= 427 * 5

=> 5 tonne = 2135 kg

(2) 1 tonne contains 75 kg sand as impurity

=> 1 tonne= 75 kg

Multiplying both sides by 5

=> 5 tonnes = 75 * 5

=> 5 tonnes = 375 kg

Part (C):

If all of the iron oxide was removed, then only aluminium and sand are left.

Aluminium = 825 kg

Sand= 74 kg

Total of them makes it:

=> 825 + 74 = 899

So,

% age of Aluminium= 825/899 * 100

% age of Aluminium= 0.918 * 100%

% age of Aluminium= 91.8%

Answer:

The nucleus has an overall positive charge as it contains the protons.

Explanation:

Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

Answer:

B. hydrochloric acid and lithium hydroxide

Explanation:

Answer:

thank you!

the answer is B) hydrochloric acid and lithium hydroxide.

Explanation:

have a rest of your day.

Answer:

they gain enough energy to break away from the bonds that keeps them a liquid

also the particles diffuse away

Explanation:

When liquid bromine evaporate,

The liquid bromine easily evaporates because of following reasons:

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Answer:

the balanced equation for the above reaction is as follows;

3NiCl₂ + 2K₃PO₄ ---> Ni₃(PO₄)₂ + 6KCl

stoichiometry of NiCl₂ to K₃PO₄ is 3:2

the number of NiCl₂ moles reacted - 0.0102 mol/L x 0.134 L = 0.00137 mol

according to molar ratio  

if 3 mol of NiCl₂ reacts with 2 mol of K₃PO₄

then 0.00137 mol of NiCl₂ reacts with - 2/3 x 0.00137 = 0.000911 mol of K₃PO₄

molarity of given K₃PO₄ solution - 0.205 M

there are 0.205 mol in 1000 mL  

therefore volume of 0.000911 mol - 0.000911 mol / 0.205 mol/L = 4.44 mL  

volume of K₃PO₄ needed is 4.44 mL

Answer:

V1/n1 = V2 /n2

0.236/0.306 = V2/ 4.40

V2 = 3.39 L

Answer:

magnesium oxide

Explanation:

Answer:

eat

Explanation:

eat the dang apples