What is the mass, in grams, of 5.90 mol C8H18?

Answer: It decreases.

Explanation:

Answer:

C

Explanation:

We can use heat stoichiometry. Thus, convert from grams of Ba to moles of Ba; and use the ΔH value to calculate the amount of heat released. Hence:

[tex]\displaystyle 5.75\text{ g Ba}\cdot \frac{1\text{ mol Ba}}{137.33\text{ g Ba}} \cdot \frac{1\text{ mol}_{rxn}}{2\text{ mol Ba}} \cdot \frac{-1107\text{ kJ}}{1\text{ mol}_{rxn}} =-46.4 \text{ kJ}[/tex]

Therefore, about 46.4 kJ of heat was released.

In conclusion, our answer is C.

The emf of the cell from the reactions and the change in free energy is 2.8 V.

The Eocell refer to the emf of the cell under standard conditions. In this case, it can be obtained from the free energy of the values of the reactants and products.

Now, given; C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)

ΔG°rxn = [2(-394) + 2( -237)] - [( -175 ) + 0 ]

= [(-788) + (-474)] + 175

= -1087  kJ/mol

Also;

ΔG° = -nFEocell

Eocell  = ΔG° /-nF

Eocell  = -1087  * 10^3/-(4 * 96500)

Eocell  =-1087  * 10^3/386000

= 2.8 V

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The required volume of concentrated stock solution of hydrochloric acid is 102.71 mL.

Volume of any solution will be calculated by using the density as:

Volume = Mass/Density

Given that percent mass of HCl is 37%, so mass of the HCl = 37g

So that mass of solution = 100g

And density of solution = 1.2 g/mL

Volume of solution = 100/1.2 = 83.33 mL = 0.08333 L

Moles of HCl will be calculated as:

n = W/M, where

W = given mass = 37g

M = molar mass = 36.4g/mol

n = 37/36.4 = 1.014mol

Then the molarity of the stock solution will be calculated as:

M = n/V

M = 1.014 / 0.0833 = 12.17M

Now the required volume of stock solution will be calculated by using the following equation as:

M₁V₁ = M₂V₂, where

M₁ & V₁ is the molarity and volume of stock solution and M₂ & V₂ is the molarity and volume of dilute solution. On putting values in the above solution we get

12.17 × V₁ = 0.5 × 2500

12.17 × V₁ = 1250

V₁ = 102.71 mL

Hence required volume of stock solution is 102.71 mL.

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The water cycle iss a process which helps to circulate and replenish water on earth.

Hydrology is the scientific study of water bodies , the changes that occur in them as well as the various features and behavior of water bodies such as oceans and rivers.

Water circulation created by prevailing wind systems. The Gulf Stream is an example up of the Coriolis effect.

The length of open sea over which wind can blow steadily to create waves is called fetch.

Salinity is the amount of dissolved salt in a liquid

The distance from the crest of one wave to the crest of another is called wavelength

Water circulation created by differences in density deepwater currents

Energy is what moves forward and through a wave.

The cyclical process of the changing state and movement of water around the Earth through evaporation, condensation, and precipitation is called water cycle.

As the amount of salt in water increases, the density of the water increases.

The type of energy possessed by moving water is called kinetic energy.

The rising of ocean water bringing nutrients up from the deep us called upwelling.

Therefore, the water cycle helps to circulate and replenish water on earth.

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Answer:

3167 .8 liters

Explanation:

P1 V1 = P2 V2

96.3 * 2000 = 60.8 * V2      solve for V2 =3167.8 l

Answer:

Unequal number of protons and electrons

Explanation:

When an atom loses or gains electrons, this affects its charge, thus creating it an ion (a charged atom)!

The number of moles of water are needed in order to produce 21.8 g of

calcium hydroxide is 0.588 moles.

Moles of any substance will be calculated as:

n = W/M, where

W = given mass

M = molar mass

Given chemical reaction is:
CaC₂ + 2H₂O → C₂H₂ + Ca(OH)₂

Moles of 21.8g of Ca(OH)₂ = 21.8g / 74.1g/mol = 0.294mol

From the stoichiometry of the reaction, it is clear that

1 mole of Ca(OH)₂ = needed 2 moles of water

0.294 mole of Ca(OH)₂ = needed 2×0.294=0.588 moles of water

Hence required moles of water is 0.588 moles.

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Explanation:

Unsaturated solution: A solution with less solute that completely dissolves without leaving any remaining substance

Saturated solution: A solution with solute that dissolves until it can't dissolve anymore, leaving some of the remaining substance left.

Supersaturated solution: A solution that has more remaining substance left than a saturated solution and tends to crystallize more than a saturated solution.

Answer:

A rotation

Explanation:

Therefore, the final pressure of the oxygen is 5.51 atm.

Let's say an engineer wants to keep 500 g of oxygen at 1 atm and 125 degrees Fahrenheit in a container. The Ideal Gas Law is used to calculate the required capacity of a container before construction can begin.

Assuming that the oxygen behaves as an ideal gas and the volume is constant, we can use the ideal gas law to solve for the final pressure.

The ideal gas law states that:

PV = nRT

where:

P = pressure

V = volume

n = number of moles

R = gas constant

T = temperature

Since the volume is constant, we can rewrite the ideal gas law as:

P1/T1 = P2/T2

where:

P1 = initial pressure

T1 = initial temperature

P2 = final pressure

T2 = final temperature

We can plug in the given values and solve for the final pressure:

P1/T1 = P2/T2

4.1 atm / (100 + 273) K = P2 / (185 + 273) K

P2 = (4.1 atm / 373 K) * (185 + 273) K

P2 = 5.51 atm

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Answer:

What Structures??

Explanation:

Can you please explain the question more

For a normal boiling point of a liquid is 282 °C, the temperature is mathematically given as

T2=181.55°C\

Generally, the equation for the gas  is mathematically given as

ln(p1/p2)=dHvap/R(1/T2-1/T1)

Therefore

ln(1/0.26)=23500/8.214(1/T2-1/555)

T2=181.55^C

In conclusion

T2=181.55°C

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The enthalpy of formation or the total energy required to break all the bonds in 1 mol hexane and has a value of -198.67 kJ.

The energy of bond breaking is the energy required to break all the bonds in 1 mole of a substance.

This energy is also the energy required to form the bonds known as enthalpy of formation of that substance.

Therefore, the total energy required to break all the bonds in 1 mol hexane is known as it enthalpy of formation and has a value of -198.67 kJ.

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Answer:

It doesn't matter because either or it's still a cation because its positive

Answer:

D. Temp

Explanation:

Temperature is a mesure of the KE of the molecules/atoms of the substance

Taking into account the reaction stoichiometry, 1 mole of silver chromate Ag₂CrO₄ are produced in this reaction.

In first place, the balanced reaction is:

2 AgC₂H₃O₂ + K₂CrO₄  → Ag₂CrO₄ + 2 KC₂H₃O₂

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:

By reaction stoichiometry 2 moles of AgC₂H₃O₂ form 1 mole of Ag₂CrO₄.

In other words, according to this balanced chemical equation, 1 mole of silver chromate Ag₂CrO₄ are produced in this reaction.

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The Sun formed about 4.6 billion years ago in a giant, spinning cloud of gas and dust called the solar nebula. As the nebula collapsed under its own gravity, it spun faster and flattened into a disk.

Answer:

hope it's helpful thanks

u did a five because u are awsome.

Answer:

I would rate myself a 5 because I completed all the work with no issues. 

Explanation:

Answer:

i think d maybe correct me if im wrong

Explanation:

La³⁺ ions are colorless compounds because they have a 4f⁰ electronic configuration. Therefore, option (B) is correct.

The lanthanide series comprises 15 metallic chemical elements with atomic numbers 57 to 71, from lanthanum through the lutetium. These elements have chemically similar elements scandium and yttrium, which are often collectively called rare-earth elements.

The chemical symbol Ln can be used to refer to any lanthanide.  They are f-block elements, corresponding to the filling of the 4f-shell. All lanthanoids form trivalent cations, Ln³⁺ are determined by the ionic radius, which decreases from lanthanum to lutetium.

The valence orbitals in lanthanides have f → f transitions that are much weaker and narrower than d → d transitions. In general, the colors of lanthanide complexes are far fainter than transition metal complexes.

The electronic configuration of the lantanum is [Rn]5d¹6s². In the +3 oxidation state, it has all shells fully filled therefore, no electron transitions are possible. Therefore, La³⁺  form colorless compounds.

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Answer:

First of all, it's KNO₃ not KNO.

Second, KNO₃ is neither an acid nor it is a base, infact, it is a salt and therefore it's neutral.

hope that helps...

Understanding the theory of plate tectonics can make people more prepared if a natural disaster occurs. By understanding the theory of tectonic plates, you can possibly predict when the next tectonic-plate related natural disaster will occur.

formula= PV = nRT

moles of Zn = 4.33 g Zn x 1 mol Zn/65.4 g

= 0.0662 moles Zn

moles H2 = 0.0662 moles Zn x 1 mol H2/mol Zn

= 0.0662 mole H2 gas

V = nRT/P

T = 38 + 273

= 311K

763 torr/760

= 1.00 atm

V = (0.0662 mol)(0.0821 Latm/Kmol)(311K)/1.00 atm

V = 1.69 L

Answer:

boiling point decreases in denver

Explanation:

in higher places

theres less atmospheric pressure

it takes less energy to bring water to the boiling point.

Less energy means less heat

which means water will boil at a lower temperature

wonderopolisorg

Answer:

I think Tetrahedral

Explanation: HaHa I D K

Answer:

Linear

Explanation:

Because it has zero lone pairs and only two atoms.

According to the mole concept, the number of moles in 50 g of NO₂ is 1.086 as molar mass of NO₂ is 46 g and as per STP conditions volume is 24.32 L.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

Initially the number of moles is calculated as, 50/46=1.086 moles . As 1 mole occupies 22.4 L at STP conditions,1.086 moles occupy 1.086×22.4=24.32 L.

Hence, the volume in liters of 50 g of NO₂ at STP is 24.32 L.

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Answer:

The rate of effusion of helium is always about twice that of oxygen.

Explanation:

Recall Graham's law of effusion:

[tex]\displaystyle \frac{r_1}{r_2} = \sqrt{\frac{\mathcal{M}_2}{\mathcal{M}_1}}[/tex]

Where r are the rates of effusion and M are the respective molecular weights.

Let r₁ be the effusion rate of helium and r₂ be the effusion rate of oxygen. Hence, M₁ = 8.00 g/mol and M₂ = 32.00 g/mol.

Substitute:

[tex]\displaystyle \begin{aligned}\frac{r_1}{r_2} & = \sqrt{\frac{(32.00\text{ g/mol})}{(8.00\text{ g/mol})}} \\ \\ & = \sqrt{4.00} \\ \\ & = 2.00 \end{aligned}[/tex]

Solving for r₁ yields:
[tex]\displaystyle \begin{aligned} \frac{r_1}{r_2} & = 2.00\\ \\ r_1 & = 2.00r_2\end{aligned}[/tex]

Hence, the rate of effusion of helium is always about twice that of oxygen. This is expected, as helium is smaller than oxygen.

Answer: 83.656 kpa

Explanation:

Use Dalton's law of partial pressures which states that the total pressure of a combination of gases is equal to the sum of the partial pressures of the constituent gases.

So we have,

P(total) = P(oxygen) + P(water vapour)

96.00 kpa = 12.344 + P(oxygen)

P(oxygen) = 83.656 kpa