A) De Qu Trata El Cuento Que Leste? (2024)

Answer:

S (sulfur)

Explanation:

In the Periodic Table, the ionization energy increases from bottom to top in a group and from left to right in a period.

The chemical elements Na (sodium), Mg (magnesium), Al (aluminium), and S (sulfur) are all in the same period. Sulfur (S) is the element located more at the right in the period. Thus, S has the highest ionization energy.

Answer:

132.15

Explanation:

Molar mass N = 14.00

Molar mass H = 1.01

Molar mass H4 = 1.01 x 4 = 4.04

Molar mass NH4 = 14.00 + 4.04 = 18.04

Molar mass (NH4)2 = 18.04 x 2 = 36.08

Molar mass S = 32.07

Molar mass O = 16.00

Molar mass O4 = 16.00 x 4 = 64.00

Molar mass SO4 = 32.07 + 64.00 = 96.07

Molar mass (NH4)2SO4 = 36.08 + 96.07 = 132.14

Answer:

A or C

Explanation:

Answer:

are made up of one or more cells

Explanation:

A cell is the building block of life of any organism. Therefore, an organism simply cannot exist if it has no cells

Answer:

wavelength

Explanation:

it is the distance between two crests ot two troughs

Answer:

pH = 4.45

Explanation:

We need to find the pH of [tex]3.5\times 10^{-5}\ M[/tex] solution of HCl. We know that, pH of a solution is given by :

[tex]pH=-log[H]^+[/tex]

Put all the values,

[tex]pH=-log[3.5\times 10^{-5}]\\\\pH=4.45[/tex]

So, the pH of the solution of HCl is 4.45.

Answer:

a thermal conductor

Explanation:

thats what its called

Answer:

The one on the left has more products than reactants and is endothermic

The one on the right has more reactants than products and is exothermic

Explanation:

Endothermic: Energy is absorbed

Exothermic: Energy is released

Answer:

Thermal Conductor

Explanation:

Answer:

a. Hexanal

Reagent: - Hot acidified potassium permanganate solution.

or : Ammoniacal silver nitrate solution

or : Fehling's solution.

or : Hot acidified potassium dichromate ( VI ) solution.

Some organic compounds can be oxidised to carboxylic acid using suitable oxidising agents. Alkanes can be converted to acid or acid salt by carboxylation reaction and alkyl halides can be converted using Grignard reagent and then hydrolysis.

What are carboxylic acids?

Carboxylic acids are organic acids containing the functional group COOH. It can be prepared through oxidation of various of organic compounds.

Hexanal can be converted to hexanoic acid using carboxylation that is reaction with carbon dioxide.

Methyl hexanoate is an ester which can be converted to hexanoic acid by hydrolysis. Reaction with water introduces the H+ group into the ester group COOMe.

1 bromopentane can be converted into hexanoic acid using grignard reagent RMg followed by hydrolysis.

Alcohols can be easily oxidised to acids. Thus, 1-hexanol can be oxidised to hexanoic acid using oxidising agents such as potassium permanganate.

Nitriles can be oxidised to corresponding carboxylic acid using oxidising agents such as chromium chloride or grignard reagent.

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Answer:

312.1 moles H₂ (4 sig.figs. based on -9551Kj value given).

Explanation:

Given N₂(g) + 3H₂(g) => 2NH₃(g); ΔH° = -91.8Kj*

One mole of H₂ consumed will give -91.8Kj/3 = -30.6Kj/mole (exothermic)

moles H₂ consumed that gives -9551Kj (exothermic) = -9551Kj/-30.6Kj/mole H₂

= 312.124183moles H₂ (calculator answer) ≅ 312.1 moles H₂ (4 sig.figs. based on -9551Kj value given).

*Note: The ∆H° = -91.8 kJ/mol units should be only 'Kj' as the heat flow value applies to substances with three different coefficient values in the standard equation. FYI :-)

For the production of -9551 kJ energy, 313.55 mol of hydrogen has been consumed.

According to the balanced chemical equation,

3 moles of hydrogen have been consumed to give -91.8 kJ/mol energy.

The energy produced by 1 mole of hydrogen = [tex]\rm \dfrac{-91.38}{3}[/tex]kJ/mol

The energy produced by 1 mole of hydrogen = -30.46 kJ/mol.

For the production of -30.46 kJ/mol energy, the moles of hydrogen used are 1.

So, for the production of -9551 kJ energy, the moles of hydrogen consumed are:

- 30.46 kJ/mol = 1 mole Hydrogen

-9551 kJ = [tex]\rm \dfrac{1}{-30.46}\;\times\;-9551[/tex]

= 313.55 moles of hydrogen.

For the production of -9551 kJ energy, 313.55 mol of hydrogen has been consumed.

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Answer:

No, because it is low, which is characteristic of covalent compounds.

Explanation:

Hello there!

In this case, for the analysis of this liquid whose boiling point is 50 °C, it is necessary for us to keep in mind that ionic compounds have high boiling points whereas covalent compounds tend to have lower boiling points. This is due to the fact that ionic compounds have stronger intermolecular forces, so more thermal energy is required for the reaction; and covalent compounds are more weakly held together so their boiling points tend to be relatively low.

In such a way, since 50 °C is a relatively low boiling point, in comparison to waters that is about 100°C and it is polar covalent, we infer this compound is not likely to be an ionic compound but a covalent compound.

Regards!

Answer:

Following are the responses to the given question:

Explanation:

Let S = solid sandy mass inside the blend

Let G = gold mass in such a blend

We search that percent G by mass

Mixture density = total blend mass / total blend volume = 3.10 g/mL

Mixture sum [tex]= S + G = 1 \ kg = 1000\ g[/tex]

Complete mixing volume = sand volume + gold volume volume

Complete mixing volume [tex]= (\frac{sand\ mass}{sand \ density}) + (\frac{gold\ mass}{gold \ density})[/tex]

Total mixture volume:

[tex]= (\frac{S}{2.84}) + (\frac{G}{19.3})\\\\ = \frac{(19.3 S + 2.84 G)}{54.812\ mL}[/tex]

[tex]\text{Mixture Density} = \frac{\text{mass mixture}}{\text{mixture volume}}[/tex]

[tex]= 3.10 \frac{g}{mL} \\\\ \to 3.10 = \frac{1000 \ g}{ \frac{(19.3 S + 2.84 G)}{ 54.812}}\\\\\to 19.3 S + 2.84 G = 17681[/tex]

When

[tex]S + G = 1000 \ g[/tex]

Solving equation:

[tex]\to 19.3 S + 2.84 G = 17 681\\\\\therefore \ S + G = 1000 \ g\\\\\to 19.3 S + 2.84 G = 17 681\\\\\to -2.84S -2.84 G = -2840\\\\----------------\\\\\to 16.46S = 14 841\\\\\to S = 901.7 g \ SanD[/tex]

When

[tex]\to S+ G = 1000\\\\\to G = 1000 - 901.7\ g\\\to G = 98.3 g \ GOLD[/tex]

Answer:

0.0395 mol NaCl

Explanation:

¡Hola!

En este caso, es necesario para nosotros considerar que las relaciones masa-mol se desarrollan teniendo en cuenta las masas molares de los compuestos involucrados en el sistema. Ahora, dado que este sistema se compone de NaCl, cloruro de sodio como sal de mesa, es posible saber que la masa molar de este es alrededor de 58.44 g/mol.

De esta manera, las moles en 2.31 g se calculan como sigue:

[tex]=2.31gNaCl*\frac{1molNaCl}{58.44gNaCl}\\\\=0.0395molNaCl[/tex]

¡Saludos!

Answer:

stable nuclei are silicon-28, zinc-64, potassium-40

while unstable one are arsenic-82, radium-228

Explanation:

There is rule to predict stability of a nuclei that is

Z <= 20 N/Z = 1 most stable

Z = 20-40 N/Z = 1.25 stable

Z = 40-80 N/Z = 1.80 less stable

Z >= 83, nucleus becomes unstable or radioactive

Here, N/Z = no. of neutrons/ No. of protons

1. silicon-28 , N/Z =14/14 = 1 stable

2. arsenic-82, N/Z = 49/33 = 1.48 (unstable)

3. Potassium-40 , N/Z = 21/19 = 1.10(stable)

4. zinc-64, N/Z =34/30 = 1.13 (stable)

5. radium-228 (unstable, radioactive)

Therefore, stable nuclei are silicon-28, zinc-64, potassium-40

while unstable one are arsenic-82, radium-228

Answer:

because it has one cotyledon and it has parallel venation also maize is grain..

Answer:

I think number4.Nuclear fusion reaction is not possible in earth

Nuclear fusion and nuclear fission both have common to temperatures over one million degrees Celsius are needed for the reaction to occur. Therefore, option 4 is correct.

What is nuclear fusion ?

A reaction known as nuclear fusion occurs when two or more atomic nuclei fuse to create new atomic and subatomic particles. Energy is released or absorbed depending on how much mass there is between the reactants and products.

Nuclear reactions that involve fusion and fission both yield enormous quantities of energy that can be used to generate power.

The two heavy isotopes of hydrogen, deuterium and tritium, are the primary fuels used in nuclear fusion. Only 0.0153% of natural hydrogen is deuterium, which may be easily and cheaply produced from seawater. Lithium, which is also widely distributed in nature, can be used to create tritium.

Thus, option 4 is correct.

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Answer:

A. The area that is now the mountains was once under the ocean.

hope this helps you ☺️☺️

Answer:

A

Explanation:

Answer:

C) low vapor pressure

Explanation:

Vapor pressure refers to the pressure created by the vapor produced at a given temperature in a closed container. The pressure created as a result of the production of vapor above the liquid in a closed container. Vapor pressure works as the result of the force of the intermolecular force. When a liquid does evaporates easily it exemplifies that it has low vapor pressure. When the liquid evaporates easily and quickly, it exemplifies that it has high vapor pressure.

Statement that express the property of intermolecular forces that is been exhibited by liquid is C: low vapor pressure.

Intermolecular forces can be regarded as forces that is found between molecules. One of the property of this intermolecular forces can be seen in liquid which low vapour pressure.

Vapour pressure is used in knowing the liquid to change into the gaseous state, it is at that point that liquid will reach i.e equilibrium pressure when in closed container.

Therefore, option C is correct.

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Answer:

The type of force is known as cohesive force

Answer:

b. nonspontaneous.

Explanation:

Hello there!

In this case, by considering the given description, it is possible for us to realize this process is b. nonspontaneous because the molecules of the gas are going to tend to spread all around the flasks instead of convening together unless an external force was applied. In such a way, this cannot be spontaneous as it will occur without any external action, and the concepts of exergonic and endothermic are specifically for chemical reactions.

Best regards!

Answer:

The law companies that value excessive ethics comply with the legal guidelines

Answer:

Tri.

Explanation:

''Tri'' is the Greek prefix used to represent the CH3 because there are three hydrogen atoms to form the covalent compound so in Greek method ''Tri'' is used for three. In Greek system, there are certain names for prefixes such as ''di'' is used for two, ''tri'' is used for three, ''tetra'' is used for four etc. This method only provides information about the number of atoms that form the covalent compound.

Answer:

2

Fe and O

Explanation:

Answer:

Answer is B.

Explanation:

Hello there!

In this case, according to the theories of acids and bases and the definition of salt, the result of the reaction when an acid reacts with a base; it is possible to find three types of salts; acidic, basic and neutral.

Acidic salts come from the reaction of a strong acid and a weak base.

Neutral salts come from reaction between a strong acid and a strong base.

Basic salts come from the reaction between a weak acid and a strong base.

Thus, the answer would be b.

Best regards!

Answer:

92.96 g

Explanation:

In order to calculate the mass of any number of moles of a given substance, we need to know the substance's molar mass:

Molar mass of N₂ = (Molar Mass of N)*2

We can look for the molar mass of N in any periodic table.

Molar mass of N₂ = 28 g/mol

Now we proceed to calculate the mass of 3.32 moles of N₂:

3.32 mol * 28 g/mol = 92.96 g

Answer:

3000000000000009000000

Answer:

-846 kJ

Explanation:

Using Henderson Hasselbach's law,

2Al + 3/2 O2 -> Al2O3 H = -1670 kJ

-(2Fe + 3/2 O2 -> Fe2O3) = Fe2O3 -> 2Fe + 3/2 O2 H = 824 kJ

-1670 kJ + 824kJ = -846 kJ