What type of nuclear reaction occurs in the Sun?​

Answers

Answer 1

Hello,

I hope you and your family are doing well!

The nuclear reactions that occur in the Sun are fusion reactions.

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Related Questions

convert 7.1x10^25 molecules of water to moles

Answers

Answer:

117.94 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{7.1 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 117.940199...\)

We have the final answer as

117.94 moles

Hope this helps you

How has Charles Darwin contributed to the study of evolution?
A.
He proposed the theory of natural selection.
B.
He excavated and studied fossils.
C.
He was the first one to use a 3-D printer.
D.
He proposed the genetic relationship between species.

Answers

Do you answer is he proposed a genetic relationship between species

Answer:

natural selection

A

Explanation:

I looked it up

if you want the answer urself look up "How has Charles Darwin contributed to the study of evolution?"

For each example, specify whether the two structures are resonance contributors to the same resonance hybrid. :: a) H;C-CH-CHz-C- ~CH; H;C CHz-CH=C CH; b) HzC_CH-CHz HsC-CH_CHz
c) H3C~CH-CH-CH-CH-CHz H;C-CH-CH-CH-CH_CHz

Answers

Indicate if the two structures in each case are resonance contributors to the same resonance hybrid.

Discribe the H;C-CH-CHz-C- ~CH; H;C CHz-CH=C CH; b?

Due to its double bond at the first carbon and triple bond at the third carbon, as well as its five carbons throughout the lengthy chain, pent-1-ene-3-yne has the formula CH2=CHCCCH3. Ethyne, which comes from ethane, is the IUPAC designation for HCCH, the simplest alkyne.

Acetylene, which is another name for ethyne, is a crucial raw ingredient in the commercial synthesis of chemicals. Methylene is an organic molecule with the chemical formula CH, also known as carbene, methylidene, and dihydridocarbon.

IUPAC names are often given to those having a higher concentration of carbon atoms. Identify each compound using its IUPAC and common names. The halogen is bromine, while the alkyl group (CH 3CH 2CH 2-) is a propyl group (Br). This gives propyl bromide its common name.

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Folded mountains like the himalayan mountains form along which boundary type: question 8 options: convergent, both oceanic crust plates divergent, both oceanic crust plates convergent, both continental crust plates divergent, both continental crust plates

Answers

Folded mountains like the himalayan mountains form along the boundary type is the convergent, both continental crust plates.

When two continental crust plates collide, they create folded mountains. This is because continental crust is thicker and less dense than oceanic crust, so when the two plates collide, they cannot easily sink into the mantle. Instead, they push against each other and fold upwards, creating mountain ranges like the Himalayas.

In contrast, when two oceanic crust plates collide (convergent, both oceanic crust plates), one plate typically sinks under the other, creating a subduction zone. When two oceanic crust plates move away from each other (divergent, both oceanic crust plates), new oceanic crust is created at the boundary. When two continental crust plates move away from each other (divergent, both continental crust plates), a rift valley is created. Therefore, the correct answer is convergent, both continental crust plates.

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A lump of zinc is tossed into a beaker of 500L of 14M hydrochloric acid. this reaction produces Hydrogen Gas and zinc (II) chloride. If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, what is the mass of the zinc?

Answers

If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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A buffer solution contains 0.289 M ammonium bromide and 0.452 M ammonia. If 0.0518 moles of nitric acid are added to 225 mL of this buffer, what is the pH of the resulting solution

Answers

The pH of the resulting solution is 8.77.

The pH of the resulting solution can be calculated using the Henderson-Hasselbalch equation:

pH = pKa + log([A^-]/[HA])

where pKa is the dissociation constant of the weak acid, [A^-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

In this case, the weak acid is ammonia (NH₃) and its conjugate base is ammonium ion (NH₄⁺). The dissociation constant (pKa) for the ammonium ion is 9.25.

First, we need to calculate the new concentrations of NH₄⁺ and NH₃ after the addition of nitric acid. Nitric acid reacts with NH₃ to form NH₄⁺ and the nitrate ion (NO₃⁻):

HNO₃ + NH₃ → NH₄⁺ + NO₃⁻

The balanced equation shows that one mole of nitric acid reacts with one mole of ammonia to form one mole of ammonium ion. Therefore, the concentration of NH₄⁺ will increase by 0.0518 moles/0.225 L = 0.2307 M, and the concentration of NH₃ will decrease by the same amount.

So, after the addition of nitric acid, the concentrations of NH₄⁺ and NH₃ will be:

[NH₄⁺] = 0.289 M + 0.2307 M = 0.5197 M

[NH₃] = 0.452 M - 0.2307 M = 0.2213 M

Now, we can plug these values into the Henderson-Hasselbalch equation:

pH = 9.25 + log(0.2213/0.5197) = 9.25 - 0.485 = 8.77


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Which of the following statements is/are true about the salt bridge? i. cations travel to the cathode and anions travel to the anode. ii. electrons travel through the salt bridge from the cathode to the anode. iii. the salt bridge used in this lab will have k and no3- ions.

Answers

All three statements are generally true about the salt bridge I.cations travel to the cathode and anions travel to the anode. ii. electrons travel through the salt bridge from the cathode to the anode. iii. the salt bridge used in this lab will have k and no3- ions.

i. Cations, which are positively charged ions, travel to the cathode (the negatively charged electrode), and anions, which are negatively charged ions, travel to the anode (the positively charged electrode), through the salt bridge. This is necessary to maintain electrical neutrality in the half-cells.

ii. Electrons do not travel through the salt bridge; they flow through an external circuit connecting the two half-cells. The salt bridge allows the flow of ions, which balances the charge buildup in the half-cells, and completes the circuit.

iii. The salt bridge used in the lab can contain any combination of cations and anions, depending on the specific electrolyte being used. However, K+ and NO3- are commonly used as they are highly soluble and have low reactivity.

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1. Calculate the percent oxygen in H2SO4.

Answers

i believe the answer is 65.254%

As 100 milliliters of 0. 10 molar koh is added to 100 milliliters of 0. 10 molar hcl at 298 k, the ph of the resulting solution will.

Answers

When 100 milliliters of 0.10 molar KOH is added to 100 milliliters of 0.10 molar HCl at 298 K, the pH of the resulting solution will decrease.

This is because KOH is a strong base and HCl is a strong acid, and when they react together, they will neutralize each other. The products of this reaction will be water and potassium chloride (KCl), which is a salt. The pH of a solution is a measure of its acidity or basicity. It is defined as the negative logarithm of the hydrogen ion concentration (H+). A low pH means the solution is acidic, while a high pH means the solution is basic. When the KOH and HCl are mixed together, they will react to form water and KCl. Since both KOH and HCl are strong, they will completely dissociate in solution. The reaction can be represented as follows:

KOH + HCl → KCl + H2OWhen these two solutions are mixed, the H+ ions from the HCl will react with the OH- ions from the KOH to form water. The remaining ions will be K+ and Cl-, which will not affect the pH of the solution.

Therefore, the resulting solution will be neutral with a pH of 7.0.

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PLEASE HELP ME, 20 POINTS

How many atoms are in 25.00 g of Li.

Question 1 options:

2.393 x 1024 atoms of Li


1.333 x 1023 atoms of Li


2.16 x 1026 atoms of Li


2.17 x 1024 atoms of Li

How many grams is 2.393 x 1024 atoms of Cl

Question 2 options:

70.45 g Cl


140.9 g Cl


140.9 mole Cl


70.45 mole Cl

How many atoms are in 25.00 g of B.

Question 3 options:

1.393 x 1024 atoms of B


1.333 x 1023 atoms of B


2.16 x 1026 atoms of B


2.17 x 1024 atoms of B

How many grams is 2.393 x 1024 atoms of O

Question 4 options:

70.45 g O


140.9 g O


63.58 mole O


63.58 g O

Answers

Explanations:

Question 1: Lithium in 20.00+ g is C. or D., but 25.00+ g is D. which means this is the correct option.

I am unsure of Question 2. I don't think it is mole though.

Question 3: Boron in 25.00-30.00 g is B. or D., but 25.00 g would be C.

Question 4: 2.393 x 1024 atoms of Oxygen is 63.58 mole O. I don't know for sure, but I think this is correct.

I am NOT professional. There is a chance I am incorrect. Please reply to me if I've made a mistake.

60. What is surface tension, and what conditions must exist
for it to occur?

Answers

The higher attraction of liquid particles to one another compared to the molecules within air at liquid-air contacts causes surface tension.

Surface tension being a chemical phenomena brought through a cohesive force, which has electrical energy as its primary source. The total length or the line or the surface region of the film have no bearing on the kind of a liquid's surface tension.

The higher attraction of liquid particles to one another (because to cohesion) compared to the molecules within air itself (due to adhesion) at liquid-air contacts causes surface tension. There are primarily two mechanisms at work.

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A 1.8 g sample of octane C8H18 was burned in a bomb calorimeter and the temperature of 100 g of water increased from 21.36 C to 28.78 C. Heat capacity of water is 4.18 J/g C. What is the heat of combustion per gram of octane? Per mole of octane?

Answers

Answer:

HEAT OF COMBUSTION PER GRAM OF OCTANE IS 1723.08 J OR 1.72 KJ/G OF HEAT

HEAT OFF COMBUSTION PER MOLE OF OCTANE IS 196.4 KJ/ MOL OF HEAT

Explanation:

Mass of water = 100 g

Change in temperature = 28.78 °C - 21.36°C = 7.42 °C

Heat capcacity of water = 4.18 J/g°C

Mass of octane = 1.8 g

Molar mass of octane = C8H18 = (12 * 8 + 1 * 18) g/mol= 96 + 18 = 114 g/mol

First is to calculate the heat evolved when 100 g of water is used:

Heat = mass * specific heat capacity * change in temperature

Heat = 100 * 4.18 * 7.42

Heat = 3101.56 J

In other words, 3101.56 J of heat was evolved from the reaction of 1.8 g octane with water.

Heat of combustion of octane per gram:

1.8 g of octane produces 3101.56 J of heat

1 g of octane will produce ( 3101.56 * 1 / 1.8)

= 1723.08 J of heat

So, heat of combustion of octane per gram is 1723.08 J

Heat of combustion per mole:

1.8 g of octane produces 3101.56 J of heat

1 mole of octane will produce X J of heat

1 mole of octane = 114 g/ mol of octane

So we have:

1.8 g of octane = 3101.56 J

114 g of octane = (3101.56 * 114 / 1.8) J of heat

= 196 432.13 J

= 196. 4 kJ of heat

The heat of combustion of octane per mole is 196.4 kJ /mol.

Mass of water = 100 g

Change in temperature = 28.78 °C - 21.36°C = 7.42 °C

Heat capcacity of water = 4.18 J/g°C

Mass of octane = 1.8 g

Molar mass of octane = C8H18 = (12 * 8 + 1 * 18) g/mol= 96 + 18 = 114 g/mol

First is to calculate the heat evolved when 100 g of water is used:

Heat = mass * specific heat capacity * change in temperature

Heat = 100 * 4.18 * 7.42

Heat = 3101.56 J

complete the fission reaction.235U + 1 neutron → [X] +141Ba + 3 neutronsMass Number:Chemical Symbol:

Answers

It's important to know that the reaction must have the total mass involved before and after due to the law of conservation of mass. This means that the total mass number of the left side of the reaction must be equal to the right side. So, we have the following

\(235+1=X+141+3\)

Notice that 235 is the mass number of U, 1 is the mass number of the neutron, X represents the mass number of the unknown element, 141 represents the mass number of Ba, and 3 represents the mass number of three neutrons. This means X should have a mass number of 92, which is the element Kr.

Therefore, the mass number is 92 and the chemical symbol is Kr.

A double pipe parallel flow heat exchanger is used to heat cold water with hot water. Hot water (cp=4.25 kJ/kg °C) enters the pipe with a flow rate of 1.5 kg/s at 80 °C and exits at 45°C. The heat exchanger is not well insulated and it is estimated that 3% of the heat given off by the hot fluid is lost through the heat exchanger. If the total heat transfer coefficient of the heat exchanger is 1153 W/m²°C and the surface area is 5 m2, find the heat transfer rate to the cold water and the logarithmic mean temperature difference for this heat exchanger. Continuous trading terms apply. The kinetic and potential energy changes of the fluid flows are negligible. There is no contamination. The fluid properties are constant.

Answers

The heat transfer rate to the cold water is 167.51 kW, and the logarithmic mean temperature difference for this heat exchanger is 28°C.

We know that, Q = m × Cp × ΔT

Where

m = mass flow rate

Cp = specific heat capacity

ΔT = Temperature difference

Q = (1.5 kg/s) × 4.25 kJ/kg °C × (80 - 45)°CQ = 172.69 kW

As per the problem, 3% of the heat given off by the hot fluid is lost through the heat exchanger.

Thus, heat loss is 0.03 × 172.69 kW = 5.18 kW

The heat transfer rate to the cold water is given as Q1 = Q - heat loss = 172.69 kW - 5.18 kW= 167.51 kW

To find the logarithmic mean temperature difference for this heat exchanger:

The formula for LMTD is,∆Tlm = (ΔT1 - ΔT2) / ln(ΔT1 / ΔT2)

where

ΔT1 = hot side temperature difference = Th1 - Tc2

ΔT2 = cold side temperature difference = Th2 - Tc1

Tc1 = inlet temperature of cold water = 20°C

Tc2 = outlet temperature of cold water = ?

Th1 = inlet temperature of hot water = 80°C

Th2 = outlet temperature of hot water = 45°C

∆T1 = Th1 - Tc2 = 80°C - Tc2

∆T2 = Th2 - Tc1 = 45°C - 20°C = 25°C

Thus,∆Tlm = (80°C - Tc2 - 45°C) / ln[(80°C - Tc2) / (45°C - 20°C)]

∆Tlm = (35°C - Tc2) / ln(2.67[(80 - Tc2) / 25])

Now, the heat exchanger is a double pipe parallel flow heat exchanger. Thus, both hot and cold fluids have the same value of LMTD.∆Tlm = 35°C - Tc2 / ln(2.67[(80 - Tc2) / 25]) = 35°C - (47.81/ln(2.67[42.79/25]))

∆Tlm = 27.81°C which is approximately equal to 28°C

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What are the similarities between homogenous and heterogenous mixtures? Name 3

Help, I only have 1. IT's due today anyone can help pls :'>

Answers

Answer: A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. And a heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.

3 similarities between homogeneous and heterogeneous mixture areas:-

i. They both are mixtures.

ii. They both contain multiple components.

iii. ( I only know 2 )

g Water is the basis for life as we know it. The unique properties involving its high heat capacity, high heat of vaporization, its ability to remain liquid over a wide temperature range, its unusual density properties in its solid form, and its dipolar nature make water irreplaceable. What does it mean to say a molecule is dipolar

Answers

Water is the basis for life as we know it. The unique properties involving its high heat capacity, high heat of vaporization, its ability to remain liquid over a wide temperature range, its unusual density properties in its solid form, and its dipolar nature make water irreplaceable. The uniqueness of water with regards to its properties and dipolar nature is given above.

To say that a molecule is dipolar means that it has two poles or two different charges. Water molecules are dipolar because the hydrogen atoms carry a partial positive charge while the oxygen atom carries a partial negative charge. The dipolar nature of water is a crucial property that makes it a versatile solvent and facilitates many important biological processes. It allows water to dissolve substances with different charges and helps maintain the structure of proteins and DNA by forming hydrogen bonds with these molecules. In short, the dipolar nature of water is one of the reasons why it is such a vital molecule for life. The uniqueness of water with regards to its properties and dipolar nature is given above.

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Which of the following is a homogeneous mixture? a) Ice cubes in soda c) Sandy water b) Vinegar d) Silver​

Answers

Answer:

The answer is salty water

Explanation:

Hope this helps :)

For the following reaction, what is the size of the equilibrium constant?
CH3COO−(aq) + H2O(l) ⇌ CH3COOH(aq) + OH−(aq)
O K > 1
O K < 1
O K ~ 1

Answers

The equilibrium constant for the given reaction is greater than 1, so K > 1.

The equilibrium constant (K) is a measure of the position of an equilibrium reaction, indicating the relative amounts of reactants and products at equilibrium. It is calculated as the ratio of the products to reactants, each raised to their respective stoichiometric coefficients. In the given reaction, \(CH3COO−(aq) + H2O(l) ⇌ CH3COOH(aq) + OH−(aq)\), the products are CH3COOH and OH-, and the reactants are CH3COO- and H2O. Since the reaction involves the production of hydroxide ions, which are the product of the reaction, and the reactants are weak acid and its conjugate base, it is an acid-base reaction. The equilibrium constant (K) for this reaction is greater than 1, indicating that at equilibrium, the products are favored over the reactants.

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En la reacción química del cloruro de metilo (CH3Cl) se encontró que el cambio total de reacción ante cuya concentración era 0,0386 mol/L se llevó acabo en 15 seg ¿Cuál es su velocidad de reacción en mol/L. S y en g/L. S?

Answers

The question asks for the calculation of the reaction rate of the chemical reaction of methyl chloride (CH3Cl) given the initial concentration of 0.0386 mol/L and the time of 15 seconds to complete the reaction. The reaction involves the formation of CH3Cl from CH3OH and HCl. Using the stoichiometry of the reaction and the concentration change of CH3OH over time, the reaction rate is calculated as -Δ[CH3OH]/Δt, which represents the rate of decrease in the concentration of CH3OH. The result is a rate of 0.0386 mol/L.s and a final concentration of CH3Cl of -0.5404 mol/L, which suggests that the reaction may not be feasible under the given conditions due to the lack of reactants and the formation of other products.

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Why are ocean currents important to coastal regions?​

Answers

Answer:

Warm and cold ocean currents can affect the climate of an area along the coast if the winds blow in from the ocean. Warm ocean currents heat the air above the water and carry the warm air to the land, increasing the temperature of the coastal region.

Explanation:

Ocean currents are important to coastal regions for a number of reasons.

What are the importance?

Distribute heat. Ocean currents distribute heat around the globe, which helps to moderate the climate in coastal regions. For example, the Gulf Stream brings warm water from the Gulf of Mexico to the coasts of Europe, which helps to keep Europe's climate warmer than it would be otherwise.

Transport nutrients. Ocean currents transport nutrients from the ocean's depths to the surface, which supports marine life. For example, the California Current brings nutrients from the deep ocean to the surface, which supports a rich marine ecosystem off the coast of California.

Diversify marine life. Ocean currents help to diversify marine life by transporting different species to different parts of the ocean. For example, the Kuroshio Current brings warm water from the western Pacific Ocean to the eastern Pacific Ocean, which has helped to diversify the marine life in this region.

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1s22s22p63s23p64s23d2 is the correct electron configuration for which of the following atoms?
a. Ca
b. Ti
c. Ge
d. Zr

Answers

The 1s² 2s²2p⁶ 3s² 3p⁶ 4s² 3d² is the correct electron configuration for the atoms is the b. Ti. The atomic number of the Ti is the 22.

The atomic number of the Ti is 22. The electronic configuration of the Ti is given below as :

Ti = 1s² 2s²2p⁶ 3s² 3p⁶ 4s² 3d²

The element name is the Titanium with the symbol Ti. The Titanium is the element belongs to the 3d block. The 3d elements are called as the transition elements. So, it is also called as the transition element. The valency of the Titanium is the 4.

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C₆H₁₂O₆ + 6O₂→6CO₂ + 6H₂O + Energy

Answers

Answer:

C₆H₁₂O₆ + 6O₂→6CO₂ + 6H₂O + Energy=chemical equation for cellular respiration

Explanation:

hope this help

this is james not jade

The electron configuration of a cation with a 2+ charge is shown below.
1s22s22p63s23p6
What is the electron configuration for the ion's neutral parent atom? The atom is a main group
element. Name the group that the parent atom likely belongs to on the Periodic Table and identify
one chemical property of the parent atom.

The electron configuration of a cation with a 2+ charge is shown below.1s22s22p63s23p6What is the electron

Answers

The electron configuration for the ion's neutral parent atom is

1s²2s²2p⁶3s²3p⁶4s²

It belongs to group 2 on the periodic table and one of its chemical properties is, it has a density of 1.54 g/cm³

From the question,

The cation has a charge of 2+. This means the neutral atom lost 2 electrons.

From the given electron configuration, the cation has 18 electrons.

Therefore, the neutral atom of ion will have 20 electrons.

∴ The electron configuration for the ion's neutral parent atom is

1s²2s²2p⁶3s²3p⁶4s²

The atom belongs to group 2 on the periodic table.

One chemical property of the parent atom

Its density is 1.54 g/cm³

Hence,  The electron configuration for the ion's neutral parent atom is

1s²2s²2p⁶3s²3p⁶4s²

It belongs to group 2 on the periodic table and one of its chemical properties is, it has a density of 1.54 g/cm³

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a 2 l container will hold about 4 g of which of the following gases at 0°c and 1 atm?

Answers

The gas that will fill the 2 L container with 4 g at 0°C and 1 atm is oxygen.

To determine which gas will fill a 2 L container with 4 g at 0°C and 1 atm, we need to use the ideal gas law equation:

PV = nRT

Where:

P = pressure (1 atm)

V = volume (2 L)

n = number of moles

R = gas constant (0.0821 L atm/K mol)

T = temperature (273 K)

We can rearrange the equation to solve for n:

n = (PV) / (RT)

To determine which gas will fill the container, we can use the molar mass of each gas and calculate the number of moles needed to fill 2 L with 4 g at 0°C and 1 atm. The gas that requires the least number of moles is the one that will fill the container.

Here are the molar masses of the gases we can choose from:

Hydrogen (H2): 2 g/mol

Helium (He): 4 g/mol

Nitrogen (N2): 28 g/mol

Oxygen (O2): 32 g/mol

Let's start with hydrogen:

n = (1 atm x 2 L) / (0.0821 L atm/K mol x 273 K) = 0.097 mol

The mass of 0.097 mol of hydrogen is:

4 g / 0.097 mol = 41.24 g/mol

Since the molar mass of hydrogen is 2 g/mol, we can see that 0.097 mol of hydrogen will only have a mass of 0.194 g, which is much less than 4 g. Therefore, hydrogen cannot be the gas that fills the container.

Let's try helium:

n = (1 atm x 2 L) / (0.0821 L atm/K mol x 273 K) = 0.097 mol

The mass of 0.097 mol of helium is:

4 g / 0.097 mol = 41.24 g/mol

Since the molar mass of helium is 4 g/mol, we can see that 0.097 mol of helium will have a mass of 0.388 g, which is also less than 4 g. Therefore, helium cannot be the gas that fills the container.

Next, let's try nitrogen:

n = (1 atm x 2 L) / (0.0821 L atm/K mol x 273 K) = 0.097 mol

The mass of 0.097 mol of nitrogen is:

4 g / 0.097 mol = 41.24 g/mol

Since the molar mass of nitrogen is 28 g/mol, we can see that 0.097 mol of nitrogen will have a mass of 2.72 g, which is greater than 4 g. Therefore, nitrogen cannot be the gas that fills the container.

Finally, let's try oxygen:

n = (1 atm x 2 L) / (0.0821 L atm/K mol x 273 K) = 0.097 mol

The mass of 0.097 mol of oxygen is:

4 g / 0.097 mol = 41.24 g/mol

Since the molar mass of oxygen is 32 g/mol, we can see that 0.097 mol of oxygen will have a mass of 3.10 g, which is less than 4 g. Therefore, oxygen is the gas that will fill the container.

Therefore, the gas that will fill the 2 L container with 4 g at 0°C and 1 atm is oxygen.

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The overall shape of a plant cell is most directly related to which of its parts?
A: Mitochondria
B: Cell membrane
C: Chloroplasts
D: Cell wall

Answers

Answer:

D

Explanation:

The cell wall

HCl(g) can be synthesized from H2(g) and Cl2(g) as represented above. A student studying the kinetics of the reaction proposes the following mechanism Step 1: Cl2(g) → 2 Cl(g) (slow) ∆H° = 242 kJ/molrxn Step 2: H2(g) + Cl(g) → HCl(g) + H(g) (fast) ∆H° = 4 kJ/molrxn Step 3: H(g) + Cl(g) → HCl(g) (fast) ∆H° = -432 kJ/molrxn Which of the following statements identifies the greatest single reason that the value of Kp for the overall reaction at 298 K has such a large magnitude?

Answers

The statement that identifies the greatest single reason that the value of Kp for the overall reaction at 298 K has such a large magnitude is the activation energy for the slow step is small, option B is correct.

The overall reaction is H₂(g) + Cl₂(g) → 2 HCl(g)

It can be represented by the following rate law:

Rate = k[H₂][Cl₂].

The value of Kp for this reaction is large because the mechanism proposed by the student involves a slow, rate-determining (Step 1) with a large positive enthalpy change, followed by two fast steps with relatively small enthalpy changes.

The rate of the overall reaction is limited by the slow step, which involves the breaking of the Cl-Cl bond in Cl₂. As a result, the concentration of Cl atoms is relatively low compared to the concentration of Cl₂ molecules, leading to a high value of Kp, option B is correct.

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The complete question is:

HCl(g) can be synthesized from H₂(g) and Cl₂(g) as represented above. A student studying the kinetics of the reaction proposes the following mechanism

Step 1: Cl₂(g) → 2 Cl(g) (slow) ∆H° = 242 kJ/mol rxn

Step 2: H₂(g) + Cl(g) → HCl(g) + H(g) (fast) ∆H° = 4 kJ/mol rxn

Step 3: H(g) + Cl(g) → HCl(g) (fast) ∆H° = -432 kJ/mol rxn

Which of the following statements identifies the greatest single reason that the value of Kp for the overall reaction at 298 K has such a large magnitude?

A. The value of ∆H for the overall reaction is large and negative.

B. The activation energy for the slow step is small.

C. The concentration of Cl₂ is much larger than that of H₂.

D. The concentration of HCl is much smaller than that of H₂ and Cl₂.

A solution is

Question 6 options:



a homogeneous mixture.




a compound.




chemically separable.




a heterogeneous mixture.

Answers

Answer:

the first one. a homogeneous mixture.

Explanation:

hope this helps :)

Typically, when two atoms form a chemical bond, the expected result is that the electrons.

Answers

When atoms form chemical bonding then the atoms attain Noble gas configuration.

Noble gas configuration of an atom includes the fundamental image of the ultimate noble fueloline previous to that atom, observed via way of means of the configuration of the ultimate electrons.so for sodium, we make the substitution of [Ne] for the 1s22s22p6 a part of the configuration. Sodium's noble fueloline configuration becomes [Ne]3s1.

Covalent bonds, atoms percentage pairs of electrons, at the same time as in ionic bonds, electrons are absolutely transferred among atoms in order that ions are formed.During the formation of a chemical bond, the predicted end result is that the electrons will whole a noble fueloline configuration in each atoms. Typically, while atoms shape a chemical bond, the predicted end result is that the electrons.

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How many milliters of carbon dioxide gas can be produced at 78°C at 45.5 psi pressure with 900.0 mL of 3.00M phosphoric acid and 235 grams of iron (III) carbonate?

Answers

592.0 mL of carbon dioxide gas will be produced at 78°C and 45.5 psi pressure with 900.0 mL of 3.00M phosphoric acid and 235 grams of iron (III) carbonate.

The balanced chemical equation for the reaction of phosphoric acid and iron (III) carbonate is:

2H3PO4(aq) + Fe2(CO3)3(s) → 2FePO4(s) + 3CO2(g) + 3H2O(l)

The molar mass of phosphoric acid is 98.00 g/mol and the molar mass of iron (III) carbonate is 231.53 g/mol. The number of moles of phosphoric acid in 900.0 mL of 3.00M solution is:

n = M * V = 3.00 mol/L * 900.0 mL = 2700.0 mol

The number of moles of iron (III) carbonate in 235 grams is:

n = m / M = 235 g / 231.53 g/mol = 1.02 mol

The limiting reagent is the reactant that is present in the smallest amount. In this case, the limiting reagent is iron (III) carbonate. The number of moles of carbon dioxide gas produced is equal to the number of moles of iron (III) carbonate reacted. The volume of carbon dioxide gas at 78°C and 45.5 psi pressure can be calculated using the ideal gas law:

PV = nRT

where:

P = pressure (45.5 psi)

V = volume (mL)

n = number of moles (1.02 mol)

R = ideal gas constant (0.08206 L * atm / mol * K)

T = temperature (78°C = 361 K)

Solving for V, we get:

V = nRT / P = 1.02 mol * 0.08206 L * atm / mol * K * 361 K / 45.5 psi = 592.0 mL

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Carbon cycle – What are the main reservoirs
of the carbon cycle? Where do the inorganic and organic carbon
cycles interact? What are the major differences and similarities
between the inorganic and organic carbon?

Answers

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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