Use the given half reactions to "construct" an electrolytic cell. Zn^2+ + 2 e^--------->Zn E°cell = -0.76 V Cu^2+ + 2 e^---------> Cu E°cell = 0.34 V 1. Predict the standard potential of the cell at 298 K. 2. What is the minimum voltage that should be applied to the standard electrolytic cell found in question to cause zn2+ to be reduced to Zn?

Answer:

It is a semi circle with a triangle on top

Answer:

wwe are asked to prive the atomic pavking factor APF for BCC is 0.68

solution

APF is given by equation (3.3) in the form

APF =nVs/Vc

whenn is the number of atoms per unit cell and for BCC n=2.0, Vs is the volume of the atom and it is given by 43π3³ and Vc is the volume of the unit cell and for BCC Vc=a³ where a is the side of the cube. From equation 3.4

we could get a by

a=4R/√3

where R is the radius of the atom. Now let us olug the expression inyo equation (1) to get APF

APF = nVs/Vc

=2.0(4/3πR³) / (4R/√3)³

=2.0(4/3πR³) / (4/√3)³ R³

=0.68

Answer:group 17

Explanation: I don’t know I just guessed and got it right .

In comparison to other groups, Group 17 has the highest electronegativity. A further explanation is below.

Thus the response above i.e., option (3) is right.

Learn more about the periodic table here:

https://brainly.com/question/23277186

Answer:

Three! 3

Explanation:

O2 means that there are two oxygen and I is just one

Answer:

Explanation:

First one is compound

The second one is three

The third one is so dissolving in a glass of water

Explanation:

!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer: Please see answers in explanation column

Explanation:

Name                Type of sugars

Sucrose               Disaccharide

Sucrose, also called table sugar with molecular formulae C12H22O11  is a disaccharide  composed of two monosaccharides ( 50%glucose + 50%  fructose.).

Lactose                 Disaccharide

 Lactose with molecular formula C12H22O11, found in milk is a disaccharide composed of two monosaccharides (galactose and glucose).

Fructose                 Monosaccharide  

Fructose with molecular formulae C6H12O6 is a natural sugar mostly found in fruits.

Starch                  Polysaccharide

Starch ,a complex carbohydrate with molecular formula  (C6H10O5)n,  is a Polysaccharide containing many  units of glucose joined together by 1,4 linkages. Sources of starch can be found in the parts of plants( roots, tubers etc).

Glucose                 monosaccharides

Glucose, is a simple sugar (monosaccharides) with the molecular formula C6H12O6.  It is found in parts of plants  as well as in humans and known as blood sugar because of its location in the bloodstream.

Answer:

The sum of an object's potential and kinetic energies is called the object's mechanical energy. As an object falls its potential energy decreases, while its kinetic energy increases. The decrease in potential energy is exactly equal to the increase in kinetic energy

Thank you and please rate me as brainliest as it will help me to level up

Answer:

-3

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

7 protons, 9 neutrons, 10 electrons.

+7, +0, -10

Step 2: FInd charge

7 + 0 - 10 = -3

Answer:

Method 1 isn't safe for humans.

Answer: Method 2 is not environment friendly, or D.

Explanation: Recycled water, or graywater, is very harmful to the fish and if used to contain them within the farm, it would make the fish overall very sick, and the fish would be refused from being sold into stores. Thus, this is the correct answer.

Answer:

Inside the reactor

In a nuclear reactor the uranium fuel is assembled in such a way that a controlled fission chain reaction can be achieved. The heat created by splitting the U-235 atoms is then used to make steam which spins a turbine to drive a generator, producing electricity.

Answer:

COAL

Explanation:

Answer:

soap

Explanation:soap

Answer:

A molecule with polar and nonpolar ends

Explanation:

Answer:

1.7820210165667731 your welcome :)

Explanation:

Answer: Braces are used by the people to correct the alignment and position of tooth or teeth in the jaw.

Explanation:

The teeth braces must have strong tensile strength and must create a constant pressure on the teeth so as to allow the straightening of the teeth.

The strong force of attraction between the molecules of the braces material that can be steel, nickel, molybdenum, copper, titanium. This makes the bracing material rigid on the teeth.

Answer:

Number of delocalized electrons

Explanation:

Magnesium has more delocalized electrons compared to sodium and this accounts for the higher melting point.

Answer:

A mixture is the blending of two or more dissimilar substances. A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous).

Explanation:

Answer:

A mixture is the blending of two or more dissimilar substances. A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous

Answer: it is C, why molecules have different shapes.

Explanation:

A P E X

The VSEPR theory (Valence Shell Electron Pair Repulsion theory) describes why molecules have different shapes.

C. Why molecules have different shapes.

The VSEPR theory is a model used to predict the shapes of molecules based on the repulsion between electron pairs in the valence shell of the central atom. It states that electron pairs, whether bonding or non-bonding, repel each other and tend to position themselves as far apart as possible to minimize electron-electron repulsion. This repulsion determines the spatial arrangement and overall shape of the molecule.

By considering the number of electron pairs around the central atom and the repulsion between them, the VSEPR theory can predict molecular geometries, including linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral, among others. It explains why molecules such as water (H₂O) have a bent shape or why carbon dioxide (CO₂) is linear.

Therefore, the correct answer is C. The VSEPR theory describes why molecules have different shapes by considering the repulsion between electron pairs in the valence shell of the central atom.

Learn more about VSEPR theory from the link given below.

https://brainly.com/question/17177984

#SPJ2

Answer:

I think Its B

Explanation:

Answer:

the answer is:

no, because the reactivity of elements decreases from right to left on the periodic table.

Explanation:

In Metals:

Period - reactivity decreases as you go from left to right.

Group - reactivity increases as you go down a group

In Non-metals

Period - reactivity increases as you go from the left to the right.

Group - reactivity decreases as you go down the group.

Reactivity:

The reactivity of the elements increases going from left to right on the periodic table. Each element going from left to right tends to be more reactive. The electronegativity increases going from left to right, and it decreases going down the table.

hope this helps!!

please mark me as brainliest

<3

The Sulfur Dioxide which is also known as Sulphur Dioxide is the entity of a bond between Sulfur and Oxygen atoms. It is known as a formula written as SO2. Here we will provide an explanation of SO2 molecular geometry, SO2 electron geometry, SO2 bond angle, and SO2 Lewis structure.Now, if we want to check the exact molecular shape of SO2, then we should understand the positions and number of electrons distributed between Sulphur and Oxygen. In the outer level, Sulphur has six electrons, and the Oxygen has four of them among which one electron is used for each bond. So total number of ten electrons in five pairs. To make bonds, four pairs are needed, so one pair remains alone. The two double bonds use two pairs each and form as a single unit.As the single alone pair not counted in the shapes description, we can conclude that the molecular shape of SO2 is V-Shaped or Bent. So, our first perception of the original structure does not match with the original one. The electron geometry of SO2 is formed in the shape of a trigonal planner. The three pairs of bonding electrons arranged in the plane at an angle of 120-degree. As the one pair remained alone, two double pairs are bonded and form a bent shape. By analyzing the Lewis structure of SO2, we can see that the SO2 is asymmetrical because it contains a region with different. Though there are so many similarities between  electron geometry and molecular geometry, there are some key differences. One of the most notable differences is that the electron geometry can be associated with one or more molecular shapes. It depends on the central atoms structure of electrons of the molecule, while the molecular geometry depends on the other atoms too which are bonded to the central atom or the free pairs of electrons.To create the Lewis structure of SO2, you need to arrange the eight valence electrons on the Sulphur. To design the best Lewis structure, you also need to calculate the formal charge of every atom too. You know that both the Sulphur and Oxygen has six valence electrons each. Here we have two Oxygen atoms, so a total number of valence electrons will be eighteen.The SO2 has a bond angle of 120-degree. One single atom of Sulphur is bonded with two atoms of Oxygen covalently. It causes a repulsion of electron pairs to form the 120-degree angle.

Answer:

Car oil and vegetable oil will mix well with gasoline

Car oil and vegetable oil will not mix with water.

Explanation:

Car oil and vegetable oil will mix well with gasoline

Car oil and vegetable oil will not mix with water.

This is because of the rule of solubility. According to this rule, like substances will only dissolve like substances. In essence, a polar compound will only dissolve another polar compound. A non-polar compound will dissolve only in a non-polar solvent.

Water is polar and oil is non-polar. The cannot mix.

Gasoline is non-polar and will dissolve oil which is also non-polar .

Answer:

The number of protons in an atom is unique to each element. For example, carbon atoms have six protons, hydrogen atoms have one and oxygen atoms have eight. The number of protons in an atom is referred to as the atomic number of that element. The number of protons also determines the chemical behavior of the element. GOOD LESSONS ♡

H and F is the pair of atom which ahs polar covalent bond. Thus option b is correct.

Polar covalent bond is defined as type of chemical bond where a pair of electrons is unequally shared between the two atoms due to the difference in their electronegativity.

HCl, H2O and HF etc. are some of the examples of polar covalent bond.

Non polar covalent bond is defined as type of chemical bond with equal sharing of the bond electron rises when the electronegativity of the two atoms are equal.

H2, N2, O2 etc. are some of the examples of non polar covalent bond.

Thus, H and F is the pair of atom which ahs polar covalent bond. Thus option b is correct.

To learn more about polar covalent bond, refer to the link below:

https://brainly.com/question/10777799

#SPJ2

Your question is incomplete, but probably your complete question was

Which pair of atoms would form a polar covalent bond?

a. H and H

b. H and F

c. N and N

d. Na and F

Answer:

a. No information is required.

b. The volume of the solution.

Explanation:

Hello!

In this case, since hydrates are salts which have additional water in their structures, when making mole-mass calculations involving them, we need to consider the how many water molecules we find in the hydrate. In such a way, for 0.430 g of cobalt nitrate hexahydrate (six water molecules), we proceed as follows:

a. Since we have 0.430 g of hydrate, we may compute the moles of anhydrous cobalt nitrate by using the molar mass of the hydrate (291.04 g/mol) and then, by noticing that one mole hydrate has one mole of anhydrous, we are able to compute the moles of anhydrous cobalt nitrate as shown below:

[tex]0.430gCo(NO_3)_26H_2O*\frac{1molCo(NO_3)_26H_2O}{291.04gCo(NO_3)_26H_2O} *\frac{1molCo(NO_3)_2}{1molCo(NO_3)_26H_2O}\\\\=1.48x10^{-3}mol Co(NO_3)_2[/tex]

It means no further information is required.

b. Since the molarity is defined by the division of the moles of solute over liters of solution (M=mol/V), we would need the volume of the solution to successfully compute it.

Bes regards!

Answer:

0.87mole

Explanation:

The reaction equation is given as;

    4Fe + 3O₂  →  2Fe₂O₃

Number of moles of Fe₂O₃ in 138.5g

To solve this problem;

 Number of moles = [tex]\frac{mass}{molar mass}[/tex]

Molar mass of Fe₂O₃ = 2(56) + 3(16) = 160g/mol

 Now;

          Number of moles  = [tex]\frac{138.5}{160}[/tex]   = 0.87mole

Answer:

The answer to the graph below is B

Explanation:

The graph has been depicting that there has been higher concentration of the product as compared to the reactant in the reaction mixture. Thus, option B is correct.

The graph drawn has been the concentration of the reactant and product with respect to the time. The line red has been the reactant concentration, while blue line has been the product concentration.

With the chemical reaction, there has been the decrease in the reactant concentration with the increase in the product concentration.

The graph has been depicting that there has been higher concentration of the product as compared to the reactant in the reaction mixture. Thus, option B is correct.

For more information about the concentration, refer to the link:

https://brainly.com/question/3045247

Answer:

True

Explanation:

a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.

Answer:

The correct answer is the epipelagic zone

Answer:

C) by converting hydrogen to helium.

Explanation:

The Sun keeps shining because of nuclear fusion processes, which consists in creating helium atoms by combining hydrogen atoms, of an atomic mass less that of helium, in conditions of high core pressure and temperature. In other words, the Sun keeps shining by producing helium at the expense of its hydrogen reserves.

Therefore, the correct answer is C.