Please help asap!!!!!!

Answer:

The equilibrium constant K for the following reaction at 25°C from standard electrode potentials is Antilog (37.5).

Chemical equilibrium is the condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs.

Reduction Half-Reaction

[tex]Fe^{3+}[/tex](aq)+[tex]e^-[/tex] →[tex]Fe^{2+}[/tex](aq)

Standard reduction electrode potentials = +0.77

Oxidation Half-Reaction

Cu(s) = [tex]Cu^{+2}[/tex](aq) + 2[tex]e^-[/tex]

Standard reduction electrode potentials = -0.34

E° cell= E°cathode- E°anode

E° cell= +0.77+0.34

E° cell=1.11

E°cell= 0.0592÷n logK

From the redox reaction equations above, n=2

1.11 V= 0.0592÷2 logK

37.5 =  logK

K= Antilog (37.5)

Hence,  the equilibrium constant K for the following reaction at 25°C from standard electrode potentials is Antilog (37.5).

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Answer:

4.92/3

Explanation:

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The empirical formula of the hydrocarbon is [tex]C_2H_3[/tex] if combustion of 8.60 g of a hydrocarbon produced 26.5 g of [tex]CO_2[/tex] and 12.2 g of [tex]H_2O[/tex].

A chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms in the molecule [tex]CH_2O[/tex] is the empirical formula for glucose.

1 mole of carbon dioxide contains a mass of 44 g, out of which 12 g are carbon.

Hence, in this case the mass of carbon in 8.46 g of [tex]CO_2[/tex]:

([tex]\frac{12}{44}[/tex]) × 8.46 = 2.3073 g

1 mole of water contains 18 g, out of which 2 g is hydrogen;

Therefore, 2.6 g of water contains;

([tex]\frac{2}{18}[/tex] × 2.6 = 0.2889 g of hydrogen.

Therefore, with the amount of carbon and hydrogen from the hydrocarbon, we can calculate the empirical formula.

We first calculate the number of moles of each,

Carbon = [tex]\frac{2.3073}{12}[/tex]  = 0.1923 moles

Hydrogen = [tex]\frac{0.2889}{1}[/tex]= 0.2889 moles

Then, we calculate the ratio of Carbon to hydrogen by dividing by the smallest number value;

            Carbon : Hydrogen

               [tex]\frac{0.1923}{0.1923}[/tex] : [tex]\frac{0.2889}{0.1923}[/tex]

                      1 :  1.5

                     (1 : 1.5) 2

                    = 2 : 3

Hence, the empirical formula of the hydrocarbon is [tex]C_2H_3[/tex].

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176.980176 g of glucose ([tex]C_6H_{12}O_6[/tex]) are contained in 555 mL of a 1.77 M glucose solution.

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.

[tex]Molality = \frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}[/tex]

[tex]1.77 M = \frac{Moles \;solute}{0.555 L}[/tex]

mole solute = 0.98235 g/mol

[tex]Moles = \frac{mass}{molar \;mass}[/tex]

[tex]0.98235 g/mol = \frac{mass}{180.16 g/mol}[/tex]

mass = 176.980176 g

Hence, 176.980176 g of glucose ([tex]C_6H_{12}O_6[/tex]) are contained in 555 mL of a 1.77 M glucose solution.

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The most reasonable way to measure absolute zero would have been to extrapolate the ideal gas law.

This is referred to the temperature at which a thermodynamic system has the lowest form of energy.

Guillaume Amontons used gas equation to prove that absence of heat was theoretically possible which would have involved only extrapolating the ideal gas law.

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A. Heat is released, so the reaction is exothermic.

B. Heat is absorbed, so the reaction is endothermic.

C. Heat is released, so the reaction is exothermic.

Answer:

Alcohol has considerable toxic effects on the digestive- and cardiovascular systems. Alcoholic beverages are classified as carcinogenic by the International Agency for Research on Cancer and increase the risk of several cancer types.

Explanation:

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Alcohol has a fire hazard symbol because it is extremely flammable and can create fires. Too be specific, ethanol alcohol is the flammable substance.

Q=mcΔt

Q=142.5 x 4.18 x 8

Q = 4.765 x 10³ J

Answer:

I think the answer is "newer strains of pesticide - resistant pests may develop" as I learnt in Biology, but I'm not sure as I don't know anything about corn plants.

Explanation:

Answer:

newer strains of pesticide

Explanation:

No matter how big or little a material is, its properties remain the same. Size, form, color, and mass are the qualities that distinguish a material from non-substances. All of these qualities, including size, shape, color, and mass, can be seen and measured. Some characteristics are physical, while others are chemical. Physical characteristics include mass, volume, density, and color.  Viscosity and solubility are examples of chemical qualities.

Answer:

1) mass and type of material

2) type of material

3) temperature

Explanation:

Answer:

For Ed

Explanation:

The first one is: The physical proprieties.

The second one is: The pH of the solution.

I've been seeing the same answers from above around though, so I may be wrong. But either way, I tried.

Answer:

=4.16×10^23Newton

Explanation:

By using formula,

F= GMm/d^2

The experimental absolute zero value is less when compared to the accepted value of absolute zero.

Absolute zero is defined as the temperature in which the lowest energy possible is attained in a thermodynamic system.

Absolute zero temperature has an accepted values of 0 Kelvin or -273.15 degrees Celsius.

At absolute zero, it is assumed that the volume of an ideal gas becomes zero. However, it has not been possible to cool any gas to absolute zero.

Based on the graph of temperature against volume of gases, the experimental absolute zero extrapolated from the graph where volume of the gases becomes zero is -285 degrees Celsius.

Therefore, the experimental absolute zero value is less when compared to the accepted value.

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Answer:

The experimental absolute zero value is less when compared to the accepted value of absolute zero.What is absolute zero?Absolute zero is defined as the temperature in which the lowest energy possible is attained in a thermodynamic system.Absolute zero temperature has an accepted values of 0 Kelvin or -273.15 degrees Celsius.At absolute zero, it is assumed that the volume of an ideal gas becomes zero. However, it has not been possible to cool any gas to absolute zero.Based on the graph of temperature against volume of gases, the experimental absolute zero extrapolated from the graph where volume of the gases becomes zero is -285 degrees Celsius.Therefore, the experimental absolute zero value is less when compared to the accepted value.

Explanation:

The electronic configuration of Lv element is [tex]5f^{14} 6d^{10} 7s^2 7p^4[/tex].

The electronic configuration of [tex]Lv^{+4}[/tex] is [tex]5f^{14} 6d^{10} 7s^2[/tex] .

Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.

And also the possible union with hydrogen can give two possible compounds:

[tex]LvH_2 \;or LvH_4[/tex]

This is because the Livermorio compound can have two different oxidation states with the values 2 and 4. When reacting with the hydrogen that its charge is +1, these would be the two possible equations of a client to the different oxidation states with the ones that might react Lv.

It is a synthetic chemical compound and its number in the periodic table is 116.

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#1

Atomic no=116

Lies ahead of Renedium -86

Electronic configuration

#2

Lv^4+ means 4 electrons donated

So it gets removed from p orbital

[Rn]5f¹⁴6d¹⁰7s²

Answer:

6PbO +O2 --> 2Pb3O4

Explanation:

The question is incomplete I assume it is

PbO + 02 - Pb304

The (w/v)% concentration of vinegar contains 5g of acetic in 100mL of solution is approx 0.5 %

The concentration of a chemical substance expresses the amount of a substance present in a mixture.

There are many different ways to express concentration.(w/v)% is one of them.

Given ;

We need to convert the grams of acetic acid to moles ;

Formula of acetic acid is CH₃COOH

Thus,

Molar mass of acetic acid = 2(12.01) + 4(1.01) + 2(16)  

                                           = 24.02 + 4.04 + 32

                                           = 60.06 grams per mol

Moles of acetic acid = 5.0/60.06

                                 = 0.083 moles

(w/v)% = 0.083 x 60 / 1000 x 100

          = 0.498 %

          = 0.5 %

Hence, The (w/v)% concentration of vinegar contains 5g of acetic in 100mL of solution is approx 0.5 %

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Answer:

Velocity = distance / time

if distance is same and time is 1/2

Velocity = distance / time/2

velocity = 2 (distance /time)

Velocity,= 2 * velocity

Velocity will be doubled

Answer:

1.) KI

-------> potassium iodide

Potassium (K⁺) is a metal and iodine (I⁻) is a nonmetal. Therefore, when naming, there are no prefixes denoting how many of each element is in the compound. Because potassium is listed first in the compound, it must be the cation. Because iodine is listed second, it must be the anion. Anions in naming have their endings dropped and have the suffix -ide added.

2.) Fe₂O₃

-------> iron(III) oxide

Iron (Fe³⁺) is a metal and oxygen (O²⁻) is a nonmetal. Therefore, when naming, there are no prefixes denoting how many of each element is in the compound. Because iron is listed first, it is the cation and oxygen is the anion. Both of the elements have charges that do not balance each other (denoted by the subscripts). Because iron can have multiple different charges, the charge of iron (+3) should be listed when naming.

3.) (NH₄)₃PO₄

-------> ammonium phosphate

Ammonium (NH₄⁺) and phosphate (PO₄³⁻) are both polyatomic ions. When these ions bond, they also don't have quantity prefixes. Ammonium is the cation and phosphate is the anion. No roman numerals are necessary because the polyatomic ions always have a particular charge.

Answer:

36.3375 g

Explanation:

Answer:

A. Along warm-water currents from warmer regions to colder regions

\

Explanation:

The experimental investigations allow for the control of variables.

The control of variables is the experimental element that remains constant and unchanged throughout the experiment of the investigation.

The control of variables is held constant during the experiment to test the relation between the dependent and independent variables.

Thus, An experimental investigation allows the control of variables all the time.

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Answer:

boiling water

Explanation:

boiling water produces more severe burns

Answer:

2290 . 75   J  absorbed

Explanation:

The copper changed from 21 to 28 degrees= 7 degrees

.85 kg = 850 gm

850 gm * 7 degrees * .385 J / g-degree) = 2290.75 j

The electrons are arranged in different orbitals, at different energy levels and sublevels.

An atomic orbital is a function describing the location and wave-like behavior of an electron in an atom.

This function can be used to calculate the probability of finding any electron of an atom in any specific region around the atom's nucleus.

Following are the sublevel with the maximum number of electrons that can be accommodated by it ;

Therefore, S-Subshell has 2 electrons, P-subshell has 3 electrons, d-subshell has 10 electrons and f-subshell has 14 electrons.

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Answer:

The answer is in the picture.

The conversion of heat to kinetic energy inside the water molecules causes the motion of the molecules to increase. The distance between molecules widens when the molecules move more quickly and clash more frequently. (As more heat is absorbed, the distance between molecules for solids, liquids, and gases widens)