This is for Earth/Space Science. Please help me and thank you in advance. I need this quickly please and thank you.


Which statement describes the solar feature shooting off into space labeled C?


1. A brief eruption of intense high-energy radiation from the sun's surface

2. A dark spot appearing from time to time on the sun's surface

3. A stream of glowing gas that shoots out from the sun in an arch

4. An envelope of plasma surrounding the sun

This Is For Earth/Space Science. Please Help Me And Thank You In Advance. I Need This Quickly Please

Answers

Answer 1
I think the answer should be number 3

Related Questions

4. The equation for the decomposition of hydrogen peroxide is shown. 2H₂O₂(aq) → 2H₂O(l) + O₂(g) 48.0 25.0 cm³ of aqueous hydrogen peroxide forms 48.0 cm³ of oxygen at room temperature and pressure (r.t.p.). Calculate the concentration i aqueous hydrogen peroxide at the start of the experiment using the following steps ● Calculate the number of moles of oxygen formed. • Deduce the number of moles of hydrogen peroxide that decomposed. • Calculate the concentration of hydrogen peroxide in mol/dm³.​

Answers

Answer:

Just add what they equal to hope this helps :)

Explanation:

If 100 pounds of chlorine gas is required for an operation, how many pounds of calcium hypochlorite (65%) would be needed for the same operation

Answers

The amount, in pounds of chlorine that will be needed, will be 201.37 pounds

Percent composition

Calcium hypochlorite goes by the chemical formula, [tex]Ca(ClO)_2[/tex].

In order to know the amount of calcium hypochlorite that will be needed for the operation, we first need to know the percent composition of chlorine in calcium hypochlorite.

Molar mass of calcium hypochlorite = 142.98 g/mol

There are 2 molecules of Cl in calcium hypochlorite. The molar mass will be 35.5 x 2 = 71 g/mol

Percent chlorine in calcium hypochlorite = 71/142.98 x 100 = 49.66%

So, what amount of calcium hypochlorite will give us 100 pounds of chlorine knowing that chlorine is 49.66% of calcium hypochlorite?

49.66% of X = 100 pounds

            X = 100 x 100/49.66 = 201.37 pounds

Thus, 201.37 pounds of calcium hypochlorite will give us approximately 100 pounds of chlorine.

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Lead crystallizes in the face-centered cubic lattice. What is the coordination number for pb?.

Answers

The coordination number for pb will be 12

Four atoms make up each unit cell of the face-centered cubic (fcc), which has a coordination number of 12. Two atoms make up each unit cell of the body-centered cubic (bcc), which has a coordination number of eight.

What is Coordination number ?

The number of atoms, ions, or molecules that a central atom or ion in a complex, coordination compound, or crystal holds as its closest neighbours.

The number of nearby atoms or ions that surround an atom or ion is known as the coordination number. The coordination number for FCC and HCP systems is 12.

Tetracarbonylnickel, Ni(CO)4, for instance, has a coordination number of 4 due to the four CO ligands that are bonded to the Ni atom.

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Managing large amounts of data and processing them quickly during communication between Earth and space is challenging. Which technology is most suitable to overcome this challenge

Answers

Utilizing wireless communication and camera imagery is the most effective technological solution to this problem.

To find the answer, we need to know more about the wireless communication and camera imagery

Wireless communication is what?The transmission of data or information between two or more sites without the use of an electrical conductor is known as wireless communication.It is difficult to manage enormous amounts of data and analyze them fast when communicating between Earth and space.Today, wireless connections are used to access the internet.

Thus, we can conclude that, the wireless connectivity and camera imaging method meet this obstacle.

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How many moles of ammonia are produced when 5.0 moles of hydrogen react with excess nitrogen?

Answers

Taking into account the reaction stoichiometry, 3.33 moles of ammonia are produced when 5.0 moles of hydrogen react with excess nitrogen.

Reaction stoichiometry

In first place, the balanced reaction is:

N₂ + 3 H₂ → 2 NH₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

N₂: 2 moles H₂: 3 molesNH₃: 2 moles

Mass of ammonia formed

The following rule of three can be applied: if by reaction stoichiometry 3 moles of hydrogen form 2 moles of ammonia, 5 moles of hydrogen form how many moles of ammonia?

[tex]moles of ammonia=\frac{5 moles of hydrogenx 2 moles of ammonia}{3 moles of hydrogen}[/tex]

moles of ammonia= 3.33 moles

Finally, 3.33 moles of ammonia are produced when 5.0 moles of hydrogen react with excess nitrogen.

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Pls Help!
A sample of seawater from a tidal estuary was found to contain a concentration of 727 mg of chloride ion per kg of seawater. If the density of the sample was 1.035 g/mL, what is the molarity of the chloride ion?

Answers

The molarity of the chloride ion is 2.0 * 10⁻⁵ M.

What is the molarity of the chloride ion?

The molarity of the chloride ion is calculated using the formula below:

Molarity = (Percentage concentration * Density ) / (Molar mass * 100)

The percentage concentration of chloride ion = 727/kg * 10⁻⁶ Kg * 100/1

The percentage concentration of chloride ion = 0.0727%

Molar mass of Chloride ion = 35.5 g/mol

Molarity = (0.0727 * 1.035)/(35.5 * 100)

Molarity of chloride ion = 2.0 * 10⁻⁵ M

In conclusion, the molarity of the chloride ion is obtained from the density and percent concentration of chloride ions in seawater.

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The reaction between A2 (two large red spheres) and B2 (two small blue spheres) to produce AB is shown in the diagram. The reactants contain 4 A 2 molecules and 3 B 2 molecules. The products contain 6 A B molecules. Determine the limiting reactant for the reaction. AB A2 B2 no limting reactant

Answers

Answer:

B₂

Explanation:

The limiting reactant is always a reactant. You can determine which reactant is limiting by identifying which has the smaller mole-to-mole ratio with the product. This ratio can be found via the coefficients of the balanced reaction.

4 A₂ + 3 B₂ ---> 6 AB

4 moles A₂
------------------  = mole-to-mole ratio A₂/AB
6 moles AB

3 moles B₂
------------------  =  mole-to-mole ratio B₂/AB
6 moles AB

Since the mole-to-mole ratio between B₂ and AB is smaller, B₂ must be the limiting reactant.
                           

Increasing the catalytic stability by optimizing the formation of zeolite-supported Mo carbide species ex situ for methane dehydroaromatization

Answers

Answer:

The synthesis of zeolite-supported Mo carbide species was studied by testing different reduction/carburization conditions applied to a zeolite-supported Mo oxide catalyst, with the aim to find the optimized treatment conditions necessary to form stable supported Mo carbide catalysts ex situ for application in methane dehydroaromatization reaction. Four types of treatment were performed and studied using temperature-programmed reduction and carburization profiles: (1) heating the catalyst in a reducing gas, H2, up to reaction temperature and switching to CH4; (2) heating the catalyst in a reducing gas, H2, mixed with dilute CH4; (3) heating the catalyst in CH4 up to reaction temperature; and (4) heating the catalyst in an inert gas (commonly He) up to reaction temperature and then switching to CH4 or to H2 followed by CH4 or to H2/CH4 mixture. Each of these processes were stopped at intermediate points to analyze the phases that were present in order to identify the structural evolution of the supported Mo carbides that originate from the supported Mo oxides. Once the supported carbides were formed, they were quenched under the same gas mixture, and then they were each tested in methane dehydroaromatization via previous heating to reaction temperature in He flow. Despite all of them showing only presence of Mo2C species on HZSM-5, the catalytic properties were dramatically different. Catalysts treated in H2 or CH4/H2 showed remarkably higher stability. These catalysts exhibited a higher Mo dispersion and thus exposure on the active surface.

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A scientist observes light from a star with a wavelength 1 of 97 nanometers (9.7 x 108 m). What is the photon energy, E, of this light?
Use this information to help you:
v=£
speed of light in a vacuum, c = 3.00 x 108 meters/second
• Planck's constant, h = 4.136 × 10-15 ev-s
energy of the photon =

Answers

Answer:

1.28 x 10⁻¹⁵ eV

Explanation:

To find the energy, you can use the photon energy equation:

E = hc / λ

In this equation,

-----> E = energy (eV)

-----> h = Plank's Constant (4.136 x 10⁻¹⁵ eV*s)

-----> c = speed of light (3.00 x 10⁸ m/s)

-----> λ = wavelength (m)

You can find the energy of the photon by plugging the given values into the equation and solving.

E = hc / λ

E = (4.136 x 10⁻¹⁵ eV*s)(3.00 x 10⁸ m/s) / 9.7 x 10⁸ m

E = 1.2408 x 10⁻⁶ / 9.7 x 10⁸ m

E = 1.28 x 10⁻¹⁵ eV

Potassium sulfate is added to water. The equation that best represents this process
is:
K₂S(s) → K(s) + 2 S(s)
K₂S(s) K(s) + 2 S(s)
K₂SO4(s) → 2 K (aq) + SO4² (aq)
K₂S(s) 2 K (aq) + S² (aq)
K₂SO4(s) 2 K(s) + SO4(g)
K₂S(s)→2 K (aq) + S² (aq)
K₂SO4(s)→2 K(s) - SO4(g)
K₂SO4(s) 2 K (aq) + SO4²(aq)

Answers

The equation that best represents the addition of potassium sulfate to water is [tex]K_2SO_4(s) -- > 2 K^+ (aq) + SO4^{2-} (aq)[/tex]

Dissolution of potassium sulfate in water

When potassium sulfate is dissolved in water, it dissociates into its cation and anion according to the following equation:

[tex]K_2SO_4(s) -- > 2 K^+ (aq) + SO4^{2-} (aq)[/tex]

The positive ions are 2 moles of potassium ions while the negative ion is a mole of sulfate ion.

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Use Table B in your Student Guide to answer the questions about ion concentrations.



A solution with a pH = 13 has approximately how many moles of OH– ions per liter?
0.1



How many moles of H+ would this same solution have per liter?
0.000000000000.1
⇒ 0.0000000000001

(Use the decimal form of your answer.)



A different solution with an H+ concentration of 1.0 × 10–4 would have a pH =
4
.

Answers

1. The amount of OH¯ present in the solution is 0.1 mol/L

2. The amount of H⁺ present in the solution is 0.0000000000001 mol/L

3. The pH of the solution with H⁺ concentration of 1×10⁻⁴ mol/L is 4

1. How to determine the amount of OH¯ in the solution

We'll begin by obtaining the pOH of the solution

pH = 13pOH =?

pH + pOH = 14

13 + pOH = 14

Collect like terms

pOH = 14 - 13

pOH = 1

Finally, we can determine the OH¯

pOH = 1OH¯ =?

pOH = –Log [OH¯]

1 = –Log [OH¯]

Multiply through by –1

–1 = Log [OH¯]

Take the anti-log of –1

[OH¯] = anti-log of (–1)

[OH¯] = 0.1 mol/L

2. How to determine the amount of H⁺pH = 13H⁺ =?

pH = –Log [H⁺]

13 = –Log [OH¯]

Multiply through by –1

–13 = Log [H⁺]

Take the anti-log of –13

[H⁺] = anti-log of (–13)

[H⁺] = 0.0000000000001 mol/L

3. How to determine the pHH⁺ = 1×10⁻⁴ mol/LpH =?

pH = –Log [H⁺]

pH = –Log 1×10⁻⁴

pH = 4

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Which of the following choices represents a balanced chemical equation?

Answers

Answer:

the correct answer: 2Ca3(PO4)2 + 6SiO2 -> P4O10 + 6CaSiO3

Explanation:

According to the Arrhenius definitions of acids and bases, choose the bases from the list of acids and bases. Check all that apply.

Answers

Answer:

a

d

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Answer:

A C D. All the other answers got it wrong for Edg3

Explanation:

HELPPP!!! how do i solve this

8. What mass of sodium hypochlorite (NaClO) is required to prepare 1.5 L of chlorine bleach, if the bleach is a 0.70 mol/L solution of sodium hypochlorite? Show your work and explain each step. The molar mass of sodium hypochlorite is 74.44 g/mol.

9. What is the final concentration when 420 mL of a 12.0 mol/L sodium hydroxide solution is diluted to 2.0 L? Show your work and explain each step.

Answers

Taking into account the definition of molarity, molar mass and dilution:

the mass of sodium hypochlorite (NaClO) required is 78.162 grams.the final concentration of a sodium hydroxide solution is 2.52 mol/L.Definition of molarity

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

[tex]molarity=\frac{number of moles}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{L}[/tex].

Definition of molar mass

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

Mass of sodium hypochlorite (NaClO)

If the bleach is a 0.70 mol/L solution of sodium hypochlorite and is required to prepare 1.5 L of chlorine bleach, replacing in the definition of molarity you get:

0.70 [tex]\frac{moles}{L}[/tex]=[tex]\frac{number of moles}{1.5 L}[/tex]

Solving:

0.70 [tex]\frac{moles}{L}[/tex]× 1.5 L= number of moles

1.05 moles= number of moles

The molar mass of sodium hypochlorite is 74.44 g/mol. So you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 74.44 grams, 1.05 moles of the compound contains how much mass?

[tex]mass=\frac{1..05 molesx74.44 grams}{1 mole}[/tex]

mass= 78.162 grams

Finally, the mass of sodium hypochlorite (NaClO) required is 78.162 grams.

Dilution

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

Ci: initial concentrationVi: initial volumeCf: final concentrationVf: final volume

Final concentration of sodium hydroxide solution

In this case, you know:

Ci= 12 mol/LVi= 420 mLCf= ?Vf= 2 L= 2000 mL (being 1 L= 1000 mL)

Replacing in the definition of dilution:

12 mol/L× 420mL= Cf× 2000 mL

Solving:

(12 mol/L× 420mL)÷ 2000 mL= Cf

2.52 mol/L= Cf

In summary, the final concentration of a sodium hydroxide solution is 2.52 mol/L.

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Ammonium hydrogen sulfide (NH4HS) can decompose to ammonia and hydrogen sulfide: What is the equilibrium constant expression for this system

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The equilibrium constant expression for this system is Keq=[NH3][H2S]

What is the the equilibrium constant expression of the system?

The ratio of the equilibrium concentrations of the products to the concentrations of the reactants raised to their respective powers to match the coefficients in the equilibrium equation is K for a system in equilibrium, according to the law of mass action. The equilibrium constant expression is known as the ratio.

Therefore, the equilibrium constant expression for this system is Keq=[NH3][H2S]

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below shows the dimensions of two colored cubes.
Dimensions of Cubes
Cube Side (cm) Mass (g)
Red: 4 12
Green: 3 10

Which cube is denser?

Red, because it has more volume and more amount of matter

Green, because it has less volume and less amount of matter.

Red, because it has less volume and more amount of matter

Green, because it has less volume and more amount of matter.

Answers

Green, because it has less volume and less amount of matter.

What is density?

Density is the mass of a material substance per unit volume. d = M/V, where d is density, M is mass, and V is volume, is the formula for density. Grams per cubic centimeter are a typical unit of measurement for density.

Because it enables us to predict which compounds will float and which will sink in a liquid, density is a crucial notion. If an object's density is lower than the liquid's, it will often float.

The dimensions of two colored cubes.

Red: 4 12

Green: 3 10

density = mass/volume

so compare

[tex]12/4^{3}[/tex] and [tex]10/3^{3}[/tex]

None of the choices is the real reason. But is the closest. It is green because 10/27 > 12/64

But red would have been denser for a side of 3.9, and green would still have had less volume and less matter.

Green, because it has less volume and less amount of matter.

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What is the temperature change the H2O sample

Answers

Answer:

5.0 °C

Explanation:

To find the temperature change, you need to use the following equation:

Q = mcΔT

In this equation,

-----> Q = heat energy (J)

-----> m = mass (g)

-----> c = specific heat capacity (J/g°C)

-----> ΔT = temperature change (°C)

You can find the temperature change by plugging the given values into the equation and simplifying.

Q = 209 J                      c = 4.18 J/g°C

m = 10.0 g                     ΔT = ? °C

Q = mcΔT                                                      <----- Equation

209 J = (10.0 g)(4.18 J/g°C)ΔT                     <----- Insert values

209 J = (41.8)ΔT                                           <----- Multiply 10.0 and 4.18

5.0 = ΔT                                                       <----- Divide both sides by 41.8

Answer:

5° C  temp change

Explanation:

Q = m c T  

       Given:  Q =209    m = 10    c = 4.18     looking for T (change in temp)

209 = 10 * 4.18 T

T = 209 / (10*4.18) = 5° C

In an aqueous solution containing Mn(II) and Mn (IV) salts, which cation would you expect to be the more strongly hydrated

Answers

In an aqueous solution containing Mn(II) and Mn (IV) salts, Mn (IV) cation is expected to be the more strongly hydrated.

A chemical event called hydration occurs when two substances interact with water. Since Mn (IV) has a stronger cation with a +4 charge than Mn (II), it will draw more oxygen ions from the Mn(II) in aqueous solution. Mn(IV) will consequently be more intensely hydrated.

Another reason for this is that Mn(IV) ions are often smaller than ions. Now, if we take a look at the element that significantly influences hydration, it is ion size. Therefore, the ion will be more hydrated if it is smaller.

So, In an aqueous solution containing Mn(II) and Mn (IV) salts, Mn (IV) cation is expected to be the more strongly hydrated.

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The composition of a given pure compound is always no matter what the source of the compound?

Answers

The composition of a given pure compound is always the same no matter what the source of the compound.

A compound seems to be a substance that is entirely made of one kind of molecule.

Every component of compounds shares the same traits and features because of their homogenous makeup. However, because mixtures are composed of several sorts of chemicals, they frequently differ in terms of content, qualities, and samples.

Therefore, the composition of a given pure compound is always the same no matter what the source of the compound.

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What kind of energy is this?

nuclear
radiant
thermal
chemical

Answers

The energy can be identified by their features, characteristics and impacts on the surrounding environment.

How to identified kind of energy?

If the energy release heat then we can say that it is a thermal energy because it warms the environment whereas if the energy produce light then it is called radiant energy.

If the energy is released from splitting atoms or fusion of atoms so we can say that it is a nuclear energy. If the energy is released from breaking of bonds of atoms and molecules, so it is Chemical energy.

So we can conclude that the energy can be identified by their features, characteristics and impacts on the surrounding environment.

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Which product is used on the natural nail prior to product application to assist in adhesion and serves to chemically bond the enhancement product to the natural nail

Answers

The product that is used on the natural nail prior to application to assist in adhesion and serves to chemically bond the enhancement product to the natural nail is known as nail primer.

What is a nail primer?

A nail primer is a chemical agent used in esthetic centers before applying a colored polish to the nails and serves as an adhesive product.

The nail primers are also very useful for improving the cleaning efficiency of the product before its application.

Nail care products include different types of chemical formulations such as, for example, creams that reinvigorate the cuticle.

In conclusion, the chemical formulation employed on the natural nail that is capable of enhancing and also assisting adhesion is called the nail primer.

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Tin and oxygen can combine to form two compounds of different combining proportions. Resulting formulas of these compounds include
a. Sn2O and SnO2 d. SnO and SnO3
b. SnO and SnO2 e. SnO2 and SnO4
c. SnO4 and SnO
???

Answers

Answer:

B.) SnO and SnO₂

Explanation:

Tin can either exist as Sn²⁺ or Sn⁴⁺ when ionized. Oxygen always exists as O²⁻ when ionized.

When ions combine, sometimes there needs to be different amounts of each ion in order to create an overall charge of 0. In one combination of the ions (Sn²⁺ and O²⁻), there only needs to be one atom of each ion. In another combination (Sn⁴⁺ and O²⁻), you need to have more anions to balance the high positive charge of the cation.

SnO
-----> Sn²⁺ and O²⁻

-----> +2 + (-2) = 0

SnO₂

-----> Sn⁴⁺ and O²⁻

-----> +4 + (-2) + (-2) = 0

Which statement is true about real gases with the correct reason:


a.
Molecules have volume which causes deviations from ideal gases at high temperature .


b.
Molecules have volume which causes deviations from ideal gases at low temperature.


c.
Molecules have volume which causes deviations from ideal gases at low pressure .


d.
Molecules have volume which causes deviations from ideal gases at high pressure.

Answers

Volume of a real gas shows deviation from ideal gas on low temperature and high pressure

Only 2 options are correct then

Molecules have volume which causes deviations from ideal gases at low temperature.Molecules have volume which causes deviations from ideal gases at high pressure.

There are 2 possible answers here : b and d.

The Ideal Gas Equation is : PV = nRT

Here, when pressure is increased and temperature is lowered, the volume of the molecules will substantially decrease, which means it has deviated from ideal behavior.

Which of the following atoms would be an ion?

A. An atom with 11 protons and 9 electrons.
B. An atom with 5 protons and 5 electrons.
C. None of these
D. An atom with 8 protons and 8 neutrons.

Answers

Answer:

best answer is D

Explanation:

if element has even number then protons and neutrons are same but if element has odd number then we should add 1 number in number of protons to know neutrons. but this rule is not work in 4 element that element are argon, nitrogen, hydrogen and one other

Lorelai discovers a compound that is 64.8 g C, 13.62 g H, and 21.58 g O. What is the empirical formula of Lorelai's compound

Answers

The empirical formula of Lorelai's compound is C₄H₁₀O

Data obtained from the questionC = 64.8 gH = 13.62 gO = 21.58 gEmpirical formula =?

How to determine the empirical formula

Divide by their molar mass

C = 64.8 / 12 = 5.4

H = 13.62 / 1 = 13.62

O = 21.58 / 16 = 1.35

Divide by the smallest

C = 5.4 / 1.35 = 4

H = 13.62 / 1.35 = 10

O = 1.35 / 1.35 = 1

Thus, the empirical formula of the compound is C₄H₁₀O

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What is the sign of δg for the folding process? what about for the unfolding (denaturation) process? how do you know?

Answers

It is a thermodynamically spontaneous process that means Protein folding occurs. The value of ΔG must be negative in the case of folding but in the case of unfolding, the value of ΔG must be positive.

When the process is thermodynamically spontaneous process results in Protein folding otherwise the process is unfolding.

The value for ΔG must be negative in the case of the folding process and the value for ΔG must be positive in the case of the unfolding process. The value of a thermodynamic parameter for the reverse reaction has an opposite sign but the same value that's why the value for ΔG must be positive and known as unfolding (denaturation) process.

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What happens to the carbon atom in the transformation of chloromethane to methyllithium?

Answers

The carbon atom reduced in the transformation of chloromethane to methyllithium.

The reaction between chloromethane  and lithium form methyllithium.

[tex]CH_{3} Cl+ 2Li[/tex] → [tex]CH_{3} Li+ LiCl[/tex]

In above reaction, methyllithium is formed by the dispersing of lithium metal and adding chloromethane  .

The carbon atom in chloromethane  is partial positive charge because chlorine is high electronegative atom. The carbon atom in methyllithium is partial negative charge because carbon is more electronegative than lithium.

So, in above reaction two lithium metal donate two electron ( each lithium donate one electron) to the carbon atom(having positive charge) of chloromethane and get negative charge in methyllithium .

The gain of electron is reduction. So,The carbon atom reduced in the transformation of chloromethane to methyllithium.

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A 684.6 mL sample of carbon dioxide was heated to 387 K. If the volume of the carbon dioxide sample at 387 K is 933.9 mL, what was its temperature at 684.6 mL

Answers

According to Charle's law equation, the volume of a sample of carbon dioxide will be 684.6 mL and the temperature will be 283.60 K.

Charle's law equation

According to Charles' Law, the volume of a gas container with a certain amount of gas within is precisely proportional to the temperature when the pressure is constant.

Calculation:

[tex]V_{1}[/tex] = 684.6 mL

[tex]V_{2}[/tex] = 933.9 mL

[tex]T_{1}[/tex] = ?

[tex]T_{2}[/tex] = 387 K

Using Charle's law equation

[tex]\frac{684.6}{T_{1} } = \frac{933.9}{387}[/tex]

[tex]T_{1} = \frac{2,64,862.8}{933.9}[/tex]

[tex]T_{1} = 283.60 K[/tex]

According to Charle's law equation, the temperature at 684.6 mL volume was 283.60 K.

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Which way does heat flow?

Answers

From hot to cold items, heat flows. When two bodies with different temperatures come into thermal contact, they exchange heat energy until they attain thermal equilibrium, at which point the cold body warms up and the hot body cools down.
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Suppose you need 0.12L of a 0.13M solution of NiCl2, but all you have is a solution that is a solution that is 0.23M. What volume of the solution do you need to dilute

Answers

- 0.05 L needs to be added to the original 0.12 L solution in order to dilute it from 0.13 M to 0.23 M.

The dilution problem uses the equation :

[tex]M_aV_a= M_bV_b[/tex]

The initial molarity (concentration) [tex]M_a =[/tex] 0.13 M

The initial volume [tex]V_a[/tex] = 0.12 L

The desired molarity (concentration) [tex]M_b[/tex] = 0.23 M

The volume of the desired solution [tex]V_b[/tex] = ( 0.12 + x L )

Substituting values in above equation;

(0.13 M ) (0.12 L) = (0.23 M ) (0.12 L + x L)

0.0156 M L = 0.0276 M L + 0.23 x M L

- 0.012 M L = 0.23 x M L

x = - 0.05

Therefore, - 0.05 L needs to be added to the original 0.12 L solution in order to dilute it from 0.13 M to 0.23 M.

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