what is the theoretical yield of sodium chloride for the reaction of 55.5 g g na n a with 72.0 g g cl2 c l 2 ?

Answer: The following should be included in your description

• Zinc is the anode, and copper is the cathode

• The lemon flesh and juice provide the salt bridge and electrolyte solution

• Electrons flow from zinc to copper through the external wires

• Electrolytes flow in the lemon. Positive ions (cations) moved toward copper electrodes (cathodes), and negative ions (anions) move toward zinc electrodes (anodes). These balance the charges building up

• Two cells in series provide more energy output than one. The clock may need more energy than can be supplied by one cell

• Batteries do not need external source of reactants, whereas a fuel cell must be supplied with reactants

Explanation: Edg 2021

A) Be

B) Ca

C) Na

D) Ar

E) Cl

F)  Li

This question simply deals with ionization energy trends across the periodic table or down the group.

Ionization energy is the energy that is needed to remove an electron from its orbital around an atom in such a manner that it will no longer be associated with that same atom.

Now, from studies, it has been found that Ionization energy decreases down a group but it tends to increase as we go from the left to right going across the periodic table.

A) Li(Lithium) and Be(Berrylium) belong to the same period which is period 2 on the periodic table. Berrylium comes after berrylium in that period and as such from the rule earlier, berrylium will have the greater ionization energy.

B) Ca(Calcium) and Ba(Barium) belong to the same group 2 in the periodic table with barium further down the group. Thus, from the trend, Ca(Calcium) will have the greater ionization energy.

C) Na(Sodium) and K(Potassium) belong to the same group 1 in the periodic table with potassium further down the group. Thus, from the trend, Na(Sodium) will have the greater ionization energy.

D) P(Phosphorus) and Ar(Argon) belong to the same period which is period 3 on the periodic table. Argon comes after Phosphorus in that period and as such from the rule earlier, argon will have the greater ionization energy.

E) Cl(Chlorine) and Si(Silicon) belong to the same period which is period 3 on the periodic table. Cl(Chlorine) comes after Si(Silicon) in that period and as such from the rule earlier, Cl(Chlorine) will have the greater ionization energy.

F) Li(Lithium) and K(Potassium) belong to the same group 1 in the periodic table with potassium further down the group. Thus, from the trend,  Li(Lithium) will have the greater ionization energy.

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Answer:

It is at the greater angle (higher solar elevation) that the surface area receives the most energy because the rays are spread out less. ... The smaller the elevation angle (30°, 20°, 10°) the less energy received per square centimeter, because the rays spread out over a greater area.

Explanation:

correct me if I'm wrong

The amount of physical material in an object

Answer:

false

Explanation:

This is not a chemical reaction.

As the student attempts to do an ion exchange on a column that is already nearly saturated with Co2+ and Zn2+, his calculated % Co will be low. This is because if a column is already nearly saturated with Co2+ and Zn2+, it means that almost all the exchangeable sites of the column are occupied by Co2+ and Zn2+.

However, since there are very few exchangeable sites available for Co2+ ions, the amount of Co2+ ions exchanged will be low. Hence, the % Co calculated will also be low. This can be explained using the concept of ion exchange, which is a process in which ions in a solution are exchanged with ions on the surface of a solid material. The solid material has exchangeable sites, which are places where ions can be exchanged.

When a solution is passed through a column containing the solid material, the ions in the solution are exchanged with the ions on the surface of the solid material. The amount of ions that can be exchanged depends on the total exchange capacity of the column, which is the total number of exchangeable sites available.

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Answer: X should represent H, hydrogen.

Explanation:

The H is the only one that hasnt been stated in the left side of the formula. H has three atoms as well.

The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

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I believe this means equal barometric pressures, I am not completely familiar with this so if i'm wrong i sincerely apologize.

If this helped please mark me brainliest.

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Answer:

D. equal barometric pressures

Explanation:

The information is below:

Explanation: Hey Sonia, I see I'm not the only one at school struggling in Chem. My best guess is to minimize the likelyhood and size-amount of a chemical reaction.

Answer:

sorry i dont know the answer

Explanation:

sorry i dont know the answer

Explanation:

Malleability refers to the flexibility of something , e.g bending

Ductility refers to how long copper wire can be stretched

Answer:

b. combustion reaction

c. displacement reaction

e. Decomposition reaction

f. redox reactions

g. combination reaction

I'm not fully sure about part c but the rest are correct

I hope it helped

A)1.75×3 moles of carbon monoxide

B)2:3

A)each mole of ferric oxide requires 3 moles of carbon monoxide. Therefore 1.75 moles requires 1.75 ×3 moles of carbon monoxide

Answer:

Explanation:

A solution of zinc metal and lead nitrate react to form zinc nitrate and lead metal.

Zn(s) + Pb(NO3)2 = Zn(NO3)2 + Pb

Chloroplasts

Hope this helps !!

To avoid spectra dominated by the solvent, most HNMR Spector are recorded in deuterated Solvent.

CHCL3 is replaced by CDCL3

H2O is replaced by D20

So,CHCL3 is inappropriate solvent for NMR

Chloroform, dimethyl sulfoxide, heavy water, and other deuterium solvents are often employed in NMR analysis. A substantial solvent signal that would normally appear in the proton NMR spectrum has been suppressed by using expensive deuterated solvents, which also makes locking and shimming easier. Deuterated Solvents are used in Nuclear Magnetic Resonance Spectroscopy for three major reasons: A: To prevent being swamped by the solvent signal. The 1H-NMR spectra of a typical proton-containing solvent exhibits a massive solvent absorption that dominates the spectrum and obstructs the peaks of interest proton. To prevent the overlapping of the big solvent peaks with the signal of the analytes, NMR samples are dissolved in deuterated solvents.

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Answer:

Explanation:

this is what the Lewis electron-dot diagram of a Cl2 molecule looks like

Lewis electron  diagram of a chlorine molecule is attached in the picture below.

Lewis dot structures are also called as electron dot structures and can be drawn if the molecular formula of a compound is known. It provides information regarding the nature of bond and the position of atoms .

They are also capable of exhibiting the lone pair if any present in a molecule or compound.Lewis defined a base to be an electron pair donor and an acid to be an electron pair acceptor.

They are capable of reflecting electronic structure of elements and even the pairing of electrons . In the diagram, each dot represents an electron while a pair of dots represent a bond between the atoms.They are useful in predicting the structure.

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132 kg of Fe2O3 would produce 132 kg of iron in the reaction.

To determine the mass of iron formed from 132 kg of Fe2O3, we need to calculate the molar masses of Fe2O3 and Fe and then use stoichiometry to find the corresponding mass of iron.

The molar mass of Fe2O3 (iron(III) oxide) is:

2(Fe) + 3(O) = 2(55.85 g/mol) + 3(16.00 g/mol) = 159.69 g/mol

Now we can set up the stoichiometric ratio between Fe2O3 and Fe:

2 mol Fe2O3 : 2 mol Fe

The molar mass of Fe (iron) is:

Fe = 55.85 g/mol

Using the molar masses and the stoichiometric ratio, we can calculate the mass of iron formed:

132 kg Fe2O3 * (1,000 g / 1 kg) * (2 mol Fe / 2 mol Fe2O3) * (55.85 g / 1 mol Fe) = 132,000 g = 132 kg

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Answer: chlorofluorocarbon

Explanation:

chlorofluorocarbon

Answer:

Carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) are greenhouse gases. Chlorofluorocarbons (CFCs) are also considered greenhouse gases, but they are now largely banned due to their damaging effects on the ozone layer.

Explanation:

The frequency of a wave is  2.80 × 10¹⁸  Hertz.  The wavelength is 0.10 nm and energy of this wave is  2.80 × 10¹⁸ .

Given that :

The frequency of a wave, v = 2.80 × 10¹⁸ Hz

wavelength = ?

formula for the wavelength is given as follows :

λ = c/ v

c = speed of light

λ = 3 × 10⁸ m/s /  2.80 × 10¹⁸ s⁻¹

λ = 1.07 × 10⁻¹⁰ = 0.10 nm

Energy of wave = h v

h = planks constant

E = 6.626 × 10⁻³⁴ J.s × 2.80 × 10¹⁸  s⁻¹

E = 18.55 × 10 ⁻¹⁶ J

Thus, The frequency of a wave is  2.80 × 10¹⁸  Hertz.  The wavelength is 0.10 nm and energy of this wave is  2.80 × 10¹⁸ .

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Answer : C. A hydrogen bond

Explanation:

Answer:

A. covalent bond

Explanation:

dipole-dipole interaction results from difference in electronegativity , eg H-F where Fluorine has strong electronegativity but Hydrogen has less electronegativity. hence the bond has dipole moment towards F atom.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of gold = 30 cm³

density = 19 g/cm³

The mass is

mass = 19 × 30

We have the final answer as

Hope this helps you

According to the position of an object in free fall in the air, we answer the questions according to the expression mentioned above.

A) The expression for the velocity of the object can be found by taking the derivative of the position expression with respect to time. This gives:

\(\[ V=\frac{dX}{dT}=V_{0}\left(1-E^{-T / T_{0}}\Right) \]\)

The term \(\( V_{0} \)\) is called the terminal velocity because it represents the maximum velocity that the object can reach as it falls. As time goes on, the velocity approaches this value, but never exceeds it.

B) The expression for the acceleration of the object can be found by taking the derivative of the velocity expression with respect to time. This gives:

\(\[ A=\frac{dV}{dT}=V_{0}\left(\frac{E^{-T / T_{0}}}{T_{0}}\Right) \]\)

C) The expression for the acceleration of the object as a function of its velocity can be found by rearranging the velocity expression and then substituting it into the acceleration expression. This gives:
\(\[ T=-T_{0}\ln\left(1-\frac{V}{V_{0}}\right) \]\)

\(\[ A=V_{0}\left(\frac{E^{-T / T_{0}}}{T_{0}}\Right)=V_{0}\left(\frac{1-\frac{V}{V_{0}}}{T_{0}}\Right)=\frac{V_{0}-V}{T_{0}} \]\)

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D. The MOLARITY of the juice DECREASES when water is added to it.

MOLARITY refers to the amount of a substance (solute) in a certain volume of solution. It is a measure of the CONCENTRATION OF A SOLUTION. In chemistry, molarity is calculated by dividing the number of moles of a solute by the volume of the solvent i.e.

MOLARITY (mol/L or M) = number of moles (n)/volume of solvent (V)

* The above equation means that the molarity of a solution is inversely proportional to its volume i.e. as molarity increases, volume decreases and vice versa.

According to this question, water is added to a glass of pure fruit juice (dilution). This means that the volume of the juice will increase. As the volume increases via addition of water, the MOLARITY DECREASES.

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The periodic table is known to consist of different elements. According to the chart, the element is lithium with an atomic number of 3.

This element is mostly used in the production of rechargeable batteries for mobile phones, laptops, etc. and it is also used  non-rechargeable batteries for production of heart pacemakers, toys, etc.

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The pressure is 0.25 atm when the gas occupies 22.4 L at 100 K.

First we can use the combined gas law equation:

(P1 x V1) / (T1) = (P2 x V2) / (T2)

Where

We can rearrange the equation to solve for P2:

P2 = (P1 x V1 x T2) / (V2 x T1)

Plugging in the values, we get:

P2 = (1.00 atm x 11.2 L x 100 K) / (22.4 L x 200 K)

P2 = 0.25 atm

Therefore, the pressure is 0.25 atm when the gas occupies 22.4 L at 100 K.

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Answer:

A. Reduced precipitation is the cause of drought.

Explanation:

Reduced precipitation begins to insufficient water availability because water catch basins or tanks tend to dry out. When it drains out, people tend to start working and drying out the backup water sources and stored ones. Until such time, that the reservoirs of water will completely be dried out. And there will be no more water for them to use and there will be a drought.

hope this helps

Answer:

Option A

Explanation: