Butane (C4H10(9), AH = -125.6 kJ/mo) reacts with oxygen to produce carbon dioxide (CO2. AH+ = -393.5 kJ/mol) and
water (H20, AH+ = -241.82 kJ/mol) according to the equation below.
2C4H10(g) + 1302(g) → 8C02(g) + 10H2O(g)
What is the enthalpy of combustion (per mole) of C4H10(9)?
Use AH yen-(AHproducts) - ( He reactants)
-2,657.5 kJ/mol
0-5315.0 kJ/mol
--509.7 kJ/mol
O-254.8 kJ/mol

Answer:

Answer: 9.35 moles Li contains 2.08 × 10 (to the power of)24 atoms .

Explanation:

Answer:2.26

Explanation:

Answer:

Explanation:

3 )

18 grams of water contains 16 grams of oxygen .

Let the grams of oxygen needed be m .

yield is 75%

Only 75 % of m will make water .

.75 m will form water .

water formed by .75 m of oxygen = 18 / 16 x .75 m

Given that

18 / 16 x .75 m = 79

m = (16 x 79) / ( 18 x .75 )

= 93.63 grams .

So oxygen required is 93.63 grams .

4 )

One mole of water contains 0.5 moles of oxygen.

2 moles of oxygen will make 2 /,5 = 4 moles of water .

percent yield is 82 % ,

so water produced = .82 x 4 = 3.28 moles of water.

here's the answer to your question

Answer:

Q.no 8 = at the at the bottom of the first hill.

Answer:

The limiting reactant is oxygen gas and the reaction would produce 3.932 x 10 ^ 7 moles of water

Explanation:

Step 1: Convert everything into moles

nH2(l) = 1.06 x 10^8 g / 2.016 g/mol = 5.26 x 10^7 mols

nO2(l) = 6.29 x 10^8 g / 32.00 g/ mol = 1.966 x 10^7 mols

Step 2: Find the limiting reagent

The limiting reagent would be oxygen gas from

the balanced equation because we have less moles of oxygen gas needed to fully combust with the hydrant gas

Step 3: Stoichiometry time

The mole ratio from oxygen gas to water is 1:2

This means that for every mole of oxygen gas two moles of water is produced

We need to multiply the moles of oxygen gas by two to find out how many moles of water has been produced

nH2O = nO2 x 2

nH2O = 1.966x10^7 x 2

nH2O = 3.932x10^7

Step 4: Therefore statement

Therefore the limiting reactant is oxygen gas and the reaction would produce 3.932 x 10 ^ 7 moles of water

Answer:

See explanation

Explanation:

The balanced equation for the formation of sulphuric acid is;

2SO2 + O2 + 2H2O → 2H2SO4

If 1 mole of SO2 occupies 22.4 L

x moles occupy 67.2 L

x = 1 × 67.2/22.4

x= 3 moles

From the reaction equation;

2 moles of SO2 yields 2 moles of H2SO4

Hence 3 moles of SO2 also yields 3 moles of H2SO4

Theoretical yield of H2SO4 = 3 moles × 98 g/mol = 294 g

Percent yield = actual yield/theoretical yield × 100

Percent yield = 250g/294g × 100

Percent yield = 85%

Explanation:

The Gas Law Apparatus is a high-quality demonstrator of the relationship between pressure, volume and temperature of a gas. The pressure gauge shows how pressure affects volume and vice versa. A digital thermometer displays the temperature.

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Solution used to white wash the walls is Quick lime(CaO) and when it is mixed with slaked lime [Ca(OH)2]. When this paste is used for white washing it combines with atmospheric CO2 to form calcium carbonate (CaCO3) which gives it a shiny texture.

Answer:

c

Explanation:

Taking into account the definition of empirical formula, the complete chemical formula for the unknown compound is N₂O.

The empirical formula of a chemical compound shows the ratio between the atoms of the compound. That is, it indicates which elements are present and the minimum ratio in whole numbers between their atoms. The empirical formula is the simplest chemical formula for a chemical compound, which is why it is also called the minimum formula.

The empirical formula must be expressed using integer relationships, then to obtain this formula, divide the numbers of moles by the smallest result of them. In this case:

Nitrogen: [tex]\frac{5.2 moles}{2.65 moles}[/tex]= 1.96 moles ≅ 2 moles

Oxygen [tex]\frac{2.65 moles}{2.65 moles}[/tex]= 1 mole

Being the chemical formula of hte compound NxO, where x stands for a whole number, this indicates that the elements N and O are in the compound in a whole number ratio of x: 1.  Then, as in the empirical formula, the numbers of moles must be expressed in whole numbers, as previously calculated, the value of x must be 2.

In summary, the complete chemical formula for the unknown compound is N₂O.

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Answer:

in a way yes and no

Explanation:

shoto can control the temperature of both of his quirks so one can over power the other

he can melt the ice with the fire

and freeze the fire over the ice

hope it helps

Hello.

Magnesium nitrate is a chemical compound with the formula Mg (NO₃) ₂. Magnesium nitrate is an inorganic salt very soluble in water and alcohol and has the appearance of fine white crystals.

Magnesium Nitrate is commonly used as a fertilizer due to its high nutritional value, since it provides Magnesium and Nitrogen, these are important nutrients in the growth of crops. It is a water soluble fertilizer. Contains 10.5% N - 15.6% MgO. Provides nitrogen in the form of nitrate.

Explanation:

here's the answer to your question

13.41 moles are present in 2.20 kg of sodium phosphate.

A mole is defined as 6.02214076 × [tex]10^{23}[/tex]of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

The molar mass of sodium phosphate is 163.94 g/mol.

2.20 kg = 2200g

[tex]Moles = \frac{2200g}{163.94 g/mol.}[/tex]

Moles = 13.41954374 = 13.41 moles

Hence, 13.41 moles are present in 2.20 kg of sodium phosphate.

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Answer:

Specific heat of solid A is greater than specific heat of solid B.

Explanation:

In the calorimeter, as the temperature is increasing, the vibrational kinetic energy will increase and this means that additional amount of energy will be needed to increase the temperature by the same value. Therefore, we can conclude that specific heat increases as temperature increases.

Now, we are told that the final temperature of solid A's calorimeter is higher than that of B.

This means from our definition earlier, Solid A will have a higher specific heat that solid B.

Answer:

all of these are properties of metalloids

Answer:

The answer is B. All of these

Explanation:

Can you mark me the brainliest?

Answer:

Principle of Original Horizontality

Answer:

eşnatto

Luch bresder sksksjskdnsldkspdm

Answer:

See explanation

Explanation:

Matter may exist in three phases; solid, liquid and gas. The state in which matter exists depends on the extent of intermolecular forces operating in the substance.

In solid particles, the molecules that compose the solid are close together because the molecules of a solid do not move from place to place but they continue to vibrate about their fixed position.

For liquids, the molecules that compose a liquid are in random motion but are less energetic than molecules of a gas.

In gases, the molecules are not held together at all. The molecules of a gas have the highest degree of freedom. They move from one point another at a high velocity.

Hence, the order of increasing degree of movement of the particles in different states of matter = solids<liquids< gases.

Solids have well arranged particles, the molecules of a liquid are a little more disorderly than liquid particles while gas particles are the most disorderly of all the states of matter.

Answer:

A. They can store and process data to make accurate weather predictions.

Explanation:

Evidentially its very accurate and useful in Science like making accurate Weather predictions.

hope i helped,

Answer:

The correct answer is It is a ratio of the concentrations in a reaction.

Explanation:

⇒ It is a ratio of the concentrations in a reaction.

This sentence is true because the equilibrium constant is calculated from the product of the concentration of the reaction products divided into the product of the concentrations of the reactants, each concentration raised by the stoichiometric coefficient. For example, for the following reaction:

aA + bB → cC + dD

The equilibrium constant is expressed as:

[tex]K = \frac{[C]^{c}[D]^{d} }{[A]^{a} [B]^{b} }[/tex]

⇒ It remains the same at different temperatures.

The sentence is false because the equilibrium constant changes with the temperature. In general, an endothermic reaction is favored by the increment of temperature (the equilibrium shifts to the right side) and disfavored with the decrease in temperature (shifts to the left).

⇒ It is represented by the symbol H.

This sentence is false because the equilibrium constant is represented with the letter K.

⇒ Its value is always close to 1.

It is not true because the equilibrium constant can be a number below or above 1.

K < 1 ⇒ there is more concentration of reactants at equilibrium

K > 1 ⇒ there is more concentration of products at equilibrium

2 Tipos de Energía Mecánica

2.1 1. Energía hidráulica

2.2 2. Energía eólica

2.3 3. Energía Mareomotriz

3 Ejemplos de Energía Mecánica

3.1 1. Planta hidroeléctrica

3.2 2. Máquinas de Vapor

3.3  3. Motor de Combustión interna

3.4 4. Molinos de Viento

3.5  5. Un Juego de Billar

3.6  6. Motor eléctrico

3.7  7. Locomotora

3.8  8. Bala

3.9 9. Una pistola de Dardos

3.10 10. Pelota sobre una mesa

https://www.aura-energia.com/ejemplos-de-energia-mecanica/

The name of the hydrocarbon with formula CH₃(CH₂)₄CCH  has been 1-heptyne. Therefore, option C is correct.

The hydrocarbon has been given as the organic compound with the carbon and hydrogen chain. The molecules are bonded by the covalent bonds.

The hydrocarbon has been named established on the number of carbon in the structure and the bond. The hydrocarbon with single bond has -ane suffix, the double bond hydrocarbon has -ene suffix, and the triple bond hydrocarbon has -yne suffix.

The given hydrocarbon has seven carbon atoms,So the name has been hept. In the presence of a triple bond in the structure, the suffix -yne has been added to it.

Thus, option C is correct.

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Answer:

C. 1-heptyne

Explanation:

Answer:

what type of language this is ??

Answer:

The number of neutrons in nucleus

Answer:

Arginine is intermediate product formed during the production of urea

The key combination is ornithine, on which the urea molecule is 'created'; intermediates in the procedure contain citrulline and arginine.

The urea cycle is a procedure of conversion of toxic ammonia to negligibly toxic urea. Consequences of the urea cycle are 1 molecule of urea, 2 molecules of ADP, and 1 molecule of both AMP and fumaric acid.

When Ammonia and carbon dioxide recovery During urea decomposition a mixture of gaseous carbon dioxide and also ammonia is accumulated and also immersed into a dilute aqueous urea resolution.

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Answer:

in fractional distillation we look at different boiling point of the mixture

Explanation:

argon will be separated from the mixture first because it has the lowest boiling point

The mixture of elements of gases of neon,argon, krypton and xenon can be separated using  fractional distillation as the  have difference in their boiling points.

An element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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Answer:

1) Hacer una pregunta con respecto al fenómeno observado: ¿Por qué se apagó la estufa mientras se cocinaba la sopa?

2) Investigar sobre el tema: Los alimentos necesitan una fuente constante de calor para cocinarse. La estufa es la fuente de calor utilizada para la cocción de alimentos, existen dos modelos de estufas: (i) combustión de gas natural, (ii) inducción eléctrica.

Las estufas por combustión de gas natural requieren de un suministro de gas y una unidad de ignición, generalmente mantienen la llama una vez garantizado el suministro de gas natural. Son los modelos más económicos y comunes, aunque son las de menor eficiencia energética.

Las estufas por inducción eléctrica utilizan la energía eléctrica como suministro, la cual es transformada en calor por medio de inductores. Son más costosas que las estufas por combustión de gas natural, pero tienen mayor eficiencia energética.

Se debe determinar que tipo de estufa posee la madre de María. No obstante, una posible causa sea la interrupción del suministro, otra por daños en algún componente (gas natural o electricidad).

3) Elaborar una hipótesis: La estufa se apagó por una interrupción  en el suministro o por daños en el sistema.

4) Se realiza un experimento:

(i) Estufa por combustión de gas natural - Se abre el suministro de gas en otra hornilla, no sale gas.

(ii) Estufa por inducción eléctrica - Se enciende otra hornilla y no se activan los inductores.

5) Análisis de datos y obtención de conclusiones - Se analiza los datos y se encuentra que no existe suministro de gas/electricidad.

6) Compartir resultados - María concluye que la estufa se apagó por interrupción en el suministro.

Explanation:

El método científico consiste en el cumplimiento de los siguientes pasos:

1) Hacer una pregunta con respecto al fenómeno observado.

2) Investigar sobre el tema.

3) Elaborar una hipótesis.

4) Se prueba una hipótesis haciendo un experimento.

5) Analizar los datos y sacar una conclusión.

6) Compartir resultados.

A continuación, representamos cada paso:

1) Hacer una pregunta con respecto al fenómeno observado: ¿Por qué se apagó la estufa mientras se cocinaba la sopa?

2) Investigar sobre el tema: Los alimentos necesitan una fuente constante de calor para cocinarse. La estufa es la fuente de calor utilizada para la cocción de alimentos, existen dos modelos de estufas: (i) combustión de gas natural, (ii) inducción eléctrica.

Las estufas por combustión de gas natural requieren de un suministro de gas y una unidad de ignición, generalmente mantienen la llama una vez garantizado el suministro de gas natural. Son los modelos más económicos y comunes, aunque son las de menor eficiencia energética.

Las estufas por inducción eléctrica utilizan la energía eléctrica como suministro, la cual es transformada en calor por medio de inductores. Son más costosas que las estufas por combustión de gas natural, pero tienen mayor eficiencia energética.

Se debe determinar que tipo de estufa posee la madre de María. No obstante, una posible causa sea la interrupción del suministro, otra por daños en algún componente (gas natural o electricidad).

3) Elaborar una hipótesis: La estufa se apagó por una interrupción  en el suministro o por daños en el sistema.

4) Se realiza un experimento:

(i) Estufa por combustión de gas natural - Se abre el suministro de gas en otra hornilla, no sale gas.

(ii) Estufa por inducción eléctrica - Se enciende otra hornilla y no se activan los inductores.

5) Análisis de datos y obtención de conclusiones - Se analiza los datos y se encuentra que no existe suministro de gas/electricidad.

6) Compartir resultados - María concluye que la estufa se apagó por interrupción en el suministro.

Answer:

d. The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

Explanation:

hopes this helps  

                                                      sorry if it doesn't

:)

Answer:

the substance mixture can be sperate by filtration, distillation, and freezing.