Choose all the correct answers.

The Jovian planets include:

Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune











Choose all the correct answers.

The terrestrial planets include:

Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune






Answer both please

When a 29.2 ml sample of a 0.496 m aqueous nitrous acid solution is titration with a 0.449 m aqueous sodium hydroxide solution, The ph after 48.4 ml of sodium hydroxide have been added is 13.07.

Given Volume of HNO2 = 29.2 ml

concentration of HNO2 = 0.496 ml

No of molars of HNO2 = 29.2 × 0.486 = 14.1912 millimole

Given volume of NaOH = 48.4 ml

concentration of NaOH = 0.496 ml

No of moles of NaOH =  48.4 × 0.496 = 24.0064 millimole

Excess NaOH = 24.0064 - 14.1912 = 9.8152 millimoles

Total volume = 48.4 + 29.2 =77.6 ml

concentration of NaOH = 9.8152 / 77.6 =0.12648m

poh = -log[oH-] = -log(0.12) = 0.9208

ph = 14 - 0.9208 = 13.07

pka of HNO2 = 3.16

at mid point of titration [HNO2] = [NO2-]

ph = pka + log [NO2-]/[HNO2-]

    = 3.16 + log 1

    = 3.16

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20 mL of 0.170 M NaOH solution is required to neutralize 20 mL of 0.170 M HCl solution.

To determine the volume of 0.170 M NaOH solution required to neutralize 20 mL of a 0.170 M HCl solution, we can use the equation:

moles of acid = moles of base

First, let's calculate the number of moles of HCl in 20 mL of the solution:

moles of HCl = (0.170 mol/L) x (20 mL / 1000 mL/L) = 0.0034 mol

Since the neutralization reaction between HCl and NaOH has a 1:1 stoichiometry, we know that 0.0034 mol of NaOH will be required to completely neutralize the HCl.

Next, we can use the concentration of the NaOH solution to determine the volume required:

moles of NaOH = 0.0034 mol

Molarity of NaOH = 0.170 M

Volume of NaOH = moles of NaOH / Molarity of NaOH = 0.0034 mol / 0.170 mol/L = 0.02 L or 20 mL

Therefore, 20 mL of 0.170 M NaOH solution is required to neutralize 20 mL of 0.170 M HCl solution.

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Answer:

B. applying heat to the liquid

Explanation:

Edge2020

Have a great day y'all :)

Applying heat to the liquid allows Valerie to pour the liquid easily, hence option B is correct.

A physical process called melting or fusing causes a substance to change its phase from a solid to a liquid.

This happens when the solid's internal energy rises, usually as a result of heat or pressure being applied, which raises the substance's temperature to the melting point.

A solid's particles generate enough energy during heating to overcome the strong bonding forces holding them tightly together.

When the mobility of the molecules in a solid accelerates to a point where it outweighs the attraction between the molecules, melting takes place.

Therefore, by applying heat to the liquid allows her to pour the liquid easily, hence option B is correct.

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Answer:

P3

Explanation:

Im pretty sure hope this helps

Answer:

the answer would be more than 2.5g

Explanation:

A buffer of 300 ml of 100 mM Tris pH 7.8 and 250 mM NaCl can be prepared by dissolving 3.64 g of Tris and 4.27 g of NaCl in 300 ml of water, and adjusting the pH to 7.8 using 10 ml of 1 M HCl. The % v/v refers to the volume of the solute while % w/v refers to the weight of the solute.

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The correct question would be as

How do you prepare 300 ml buffer of 100 mM Tris pH 7.8 and 250 mM NaCl? % v/v,% w/v Questions.

Answer:

They're considered nonrenewable because they take millions of years to develop. They can't be renewed as fast as we're taking them.

The incorrect interpretation of the given balanced equation is option a.

2g s + 3g O2 →2 g SO3.

The coefficient of the reacting species and products are not showing the amount in grams.

In the balanced chemical equation of a reaction, all the reactants and products are written in their perfect stoichiometry. The number of each elements in the reactant side must be equal to their number in  product side. So that the law of conservation of mass is obeyed.

The coefficients of the reactants and products can be balanced to equate the number of each elements in both side. The coefficients represent the number of moles of the reactants and products. Sometimes they are considered to be the number of reacting atoms of each elements.

In the given reaction, 2 moles of S reacts with 3 moles of oxygen gas giving 2 moles of sulphur trioxide. Here, the amount in grams are not given. Therefore, option a is incorrect.

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Your question is incomplete. But your complete question is attached below:

The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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Answer:

migraine

Explanation:

d

The mass of coffe is 1176 g. The number of moles of caffiene is 6 moles and the number of caffiene molecules is 3.6 * 10^24 molecules

Coffe is an energy drink that is commonly made of caffiene. It is the active ingridient in coffe.

Now we have;

Volume of the coffe = 0.956 liters or 956 cm^3

density of the coffe = 1.23g/cm^3

Mass of coffe = 1.23g/cm^3 * 956 cm^3 = 1176 g

Number of moles of caffiene= mass /molar mass =   1176 g/194 g/mol = 6 moles

Now;

If 1 mole contains 6.02 * 10^23 molecules

6 moles contains 6 moles  * 6.02 * 10^23 molecules/1 mole

= 3.6 * 10^24 molecules

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Answer:

whats figure 1????????????

Answer:

Protons have a positive charge.

Neutrons have no charge.

Electrons have a negative charge.

Explanation:

I hope this helps :)

Answer:

it depends on the assignment but im down

Explanation:

Answer:

what is it about I can prob help :)

The electron-pushing mechanism for the decarboxylation reaction involves the addition of three curved arrows.

In the decarboxylation reaction, a carboxylic acid group (-COOH) is removed from a molecule, resulting in the formation of a carbon-carbon double bond. This process typically occurs under specific conditions, such as heating or the presence of a catalyst. To illustrate the electron-pushing mechanism for this reaction, let's consider the decarboxylation of a generic carboxylic acid represented as R-COOH.

First, we start with the carboxylic acid molecule (R-COOH) and focus on the carbon-oxygen bond of the carboxyl group. We can add the first curved arrow, which starts at the carbon atom, represents the movement of a lone pair of electrons, and ends at the oxygen atom of the carboxyl group. This curved arrow indicates the electron flow from the carbon atom towards the oxygen atom.

Next, we consider the oxygen atom's lone pair of electrons. We can add the second curved arrow, which starts at the oxygen atom, represents the movement of the lone pair of electrons, and ends at the adjacent carbon atom. This curved arrow indicates the electron flow from the oxygen atom towards the adjacent carbon atom.

Finally, we focus on the carbon-carbon bond adjacent to the carboxyl group. We can add the third curved arrow, which starts at the carbon atom on the other side of the carbon-carbon bond, represents the movement of a lone pair of electrons, and ends at the adjacent carbon atom. This curved arrow indicates the electron flow from the carbon atom towards the adjacent carbon atom, resulting in the formation of a carbon-carbon double bond.

Overall, the three curved arrows demonstrate the electron-pushing mechanism for the decarboxylation reaction, showing the movement of electron pairs and the formation of a carbon-carbon double bond.

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Answer:

Global wind

Explanation:

The jet streams go around the whole earth from west to east

Hope you have a good day :)

The coffee cup released 33,962 joules of energy as it cooled from 75°C to 20°C.

The amount of energy released by the coffee cup is calculated using the formula:

Q = mcΔT,

where Q is the amount of heat energy released, m is the mass of the coffee, c is the specific heat capacity of water (4.18 J/g°C), and ΔT is the change in temperature.

In this case, the mass of the coffee is 140 g,

ΔT = 75°C - 20°C = 55°C, and

c = 4.18 J/g°C.

Q = mcΔTQ = (140 g) (4.18 J/g°C) (55°C)Q = 33,962 J

Thus, the coffee cup released 33,962 joules of energy as it cooled from 75°C to 20°C.

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Answer:

The first one is Propane

The second one is HEPTANE

The third one is octane

The 4th is butane

the 5th is decane

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

The images has been the representation of the ball and stick structure of the compounds. The central balls have been the representation of the carbon atom , with small balls attached to the sticks have been the representation of the hydrogen attached.

The following structures has been given as:

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

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Answer: When carbon(C) combines with chlorine(Cl), carbon forms single covalent bond with each chlorine atom. The valence shell configuration of uncombined C atom is 2s2 2px1 2py1 .

During combination hybridisation takes place, an electron shifts from 2s to empty 2pz . These four orbitals merge to form four hybrid orbitals. Each hybrid orbital has 1 electron which pairs up with a valence electron of Cl atom to form a covalent bond. Thus the four hybrid orbitals form four single covalent bonds with four chlorine atoms. This completes each atom's octet and gives them noble gas configuration.

When two atoms of different elements combine they always have electronegativity(EN) difference due to which the shared pair of electrons is more closer to more electronegative atom. This gives the bonds some ionic character. So no bond between two atoms of different elements can be purely covalent.

Explanation:

Answer:

AL and F

Explanation:

ionic bonds occur through a metal and a non metal

The result suggests that the assumptions made in the calculation may not be valid, since the calculated yield is greater than 100%.

The balanced chemical equation for the synthesis of ammonia is:

N2 + 3H2 → 2NH3

From the given data, we can calculate the number of moles of nitrogen and hydrogen present in the reaction container:

n_N2 = m_N2 / M_N2 = 1.27 kg / 28.02 g/mol = 45.34 mol

n_H2 = m_H2 / M_H2 = 0.310 kg / 2.016 g/mol = 154.09 mol

We can assume that the reaction goes to completion, which means that all of the nitrogen and hydrogen react to form ammonia. According to the stoichiometry of the balanced equation, 3 moles of hydrogen react with 1 mole of nitrogen to form 2 moles of ammonia. Therefore, the total number of moles of ammonia formed is:

At equilibrium, the total number of moles of gas in the container remains constant. Therefore, the number of moles of unreacted nitrogen and hydrogen can be calculated as:

\(n_N2_unreacted = n_N2_initial - (1/3) * n_NH3 = 45.34 mol - (1/3) * 136.02 mol = 3.25 mol\\n_H2_unreacted = n_H2_initial - (1/3) * n_NH3 = 154.09 mol - (1/3) * 136.02 mol = 109.02 mol\)

The total number of moles of gas at equilibrium is:

\(n_total = n_N2_unreacted + n_H2_unreacted + n_NH3 = 3.25 mol + 109.02 mol + 136.02 mol = 248.29 mol\)

The mass of gas present at equilibrium can be calculated from the ideal gas law:

\(PV = nRTm_total = (n_total)(M_total) = (248.29 mol)(28.01 g/mol) = 6958.27 g\)

Therefore, the mass of gas present in the reaction mixture at equilibrium is 6958.27 g.

The percent yield of the reaction can be calculated as the actual amount of ammonia produced (136.02 mol) divided by the theoretical amount of ammonia that could have been produced based on the amount of nitrogen initially present (45.34 mol):

percent yield = (actual yield / theoretical yield) * 100

\(percent yield = (136.02 mol / 45.34 mol) * 100 = 300.3%\)

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Answer:

the case of a wave, the speed is the distance traveled by a given point on the wave (such as a crest) in a given interval of time. In equation form, If the crest of an ocean wave moves a distance of 20 meters in 10 seconds, then the speed of the ocean wave is 2.0 m/s.

Explanation:

Answer:

0.1 M molar NaaOH

Explanation:

M1V1= M2V2

M1 = 0.150M NaOH

V1=100 ml

V2=150 ml

M2=?

M2= M1V1/V2

M2= 0.150*100/150=0.1 M

They mimicked the flight of birds.

Answer:

B.

Explanation:

Just took the test

The density of a ocean water rises as the temperature falls. As a result, it water gets colder the denser it is. As salinity grows, seawater's density rises as well.

As the salinity rises, the density of the water rises. At all temperatures just above freezing point, seawater with a salinity more than 24.7 becomes denser as the temperature drops. Pressure increases cause seawater's density to rise.

Fresh water is introduced into the sea as a result of rising surface temperatures, melting ice, and increased precipitation, which reduces salinity. Seawater with a lower salinity has a lower density so won't sink as far as water with a higher density. Ocean currents are modified by this process.

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After the solutions are mixed, a white precipitate of calcium oxalate will form, while the Li+ and Cl- ions will remain in the resulting solution.

When the solutions of CaCl2 and Li2C2O4 are mixed, a double displacement reaction occurs. The calcium ions (Ca2+) from CaCl2 react with the oxalate ions (C2O42-) from Li2C2O4 to form a precipitate of calcium oxalate (CaC2O4) according to the following equation:

CaCl2 + Li2C2O4 → CaC2O4 + 2 LiCl

Since calcium oxalate is insoluble in water, it will form a solid precipitate. The precipitate will appear as a white, finely divided solid in the solution. The remaining ions, Li+ and Cl-, will stay in the solution.

Therefore, after the solutions are mixed, a white precipitate of calcium oxalate will form, while the Li+ and Cl- ions will remain in the resulting solution.

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Question:

How many moles of H2O are formed from the combustion of 5.0 mol CH4

Answer:

For any balanced chemical reaction, whole numbers (coefficients) are used to show the quantities (generally in moles ) of both the reactants and products. For example, when oxygen and hydrogen react to produce water, one mole of oxygen reacts with two moles of hydrogen to produce two moles of water.

The molality of the solution is 3.6 molal

The boiling point is the temperature at which the pressure of the system is equal to the atmospheric pressure. Now we know that freezing point depression is one of the colligative properties.

We have that;

ΔT = K m i

ΔT = Freezing point depression

m = molality of the solution

i = Van't Hoff factor

i =1 because the solute is molecular

ΔT = 5.12 oC/molal * m * 1

We can get ΔT from; Freezing point of pure solvent - Freezing point of solution

=  5.49 °c - ( -13.0 °c) = 18.49°c

m = ΔT /k * 1

m = 18.49°c/5.12 oC/molal

m = 3.6 molal

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