what is the proper line notation for the following reaction? 2ag (aq) cd(s) → cd2 (aq) 2ag(s); e°cell = 1.20 v

Explanation:

Concentration question....

0.965L x (0.0575 mol MgSO4 / 1L) x (120.4g MgSO4 / 1 mol MgSO4) = 6.68g MgSO4

The concept molarity is used here to determine the grams of magnesium sulfate dissolved in 0.965 L of a 0.0575 M solution. The mass of magnesium sulfate in grams is 6.68 g.

The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. It is generally represented by the unit mol/L. The equation used to calculate the molarity is:

Molarity = Number of moles of the solute / Volume of the solution in litres

The molar mass of MgSO₄ = 120.36 g/mol

We have 0.0575 M solution.

That is 0.0575 mol/L × 120.36 g/mol = 6.9207 g/L

Here we want mass in 0.965 L. So the mass is:

Mass = 0.965 L × 6.9207 g/L = 6.68 g

Thus the mass in grams of magnesium sulfate is 6.68 g.

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Answer:

The reason is carbon's ability to form stable bonds with many elements, including itself. 

Explanation:

This property allows carbon to form a huge variety of very large and complex molecules. In fact, there are nearly 10 million carbon-based compounds in living things!

Answer:

Explanation:

The reason is that carbon is able to form stable bonds with many elements, including itself, which allows carbon to form a huge variety of very large and complex molecules.

Answer:

The answer to your question is 15

Answer:

0.409 m

Explanation:

The molarity of the original K₂CO₃ solution given the data from the question is 0.409 M

H₂SO₄ + K₂CO₃ —> K₂SO₄ + CO₂ + H₂O

From the balanced equation above,

MaVa / MbVb = nA / nB

(0.25 × 38.4) / (Mb × 23.5) = 1

9.6 / (Mb × 23.5) = 1

Cross multiply

Mb × 23.5 = 9.6

Divide both side by 23.5

Mb = 9.7 / 23.5

Mb = 0.409 M

Thus, the molarity of the K₂CO₃ solution is 0.409 M

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The unknown metal X is iron metal as it reacts with copper sulfate solution but does not react with magnesium chloride.

Some metals are very reactive while other metals are less reactive or unreactive. When a more reactive metal is added to the solution of a less reactive metal, then the more reactive displaces the less reactive metal from its solution is known as a displacement reaction.

The general form of a single displacement reaction can be represented as:

\(A + BC \longrightarrow B + AC\)

When iron is placed in copper sulfate (CuSO₄) solution then the blue color of the copper sulfate solution turns a red-brown coating of copper metal deposited on the iron.

\(CuSO_4 (aq)+ Fe (s)\longrightarrow FeSO_4 (aq) +Cu(s)\)

Iron lies above the electrochemical series and is more reactive than copper. So it reacts with copper sulfate but does not give any reaction with magnesium chloride.

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The concept Boyle's law is used here to determine the volume of the gas at STP. The volume of dry gas at STP is 576.17 mL.

The Boyle's law states that at constant temperature, the volume of a given mass of gas is inversely proportional to its pressure. Mathematically the law can be expressed as:

PV = k (Constant)

For two different gases, the equation is:

P₁V₁ = P₂V₂

Then the new volume is:

V₂ = P₁V₁ /  P₂

= 115.4 × 350.0 / 70.1

= 576.17 mL

Thus the volume of the dry gas is 576.17 mL.

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Answer:

The no. of protons = atomic number

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The primary attribute of the central atom bonded to oxygen that determines whether an oxide is acidic, basic, or neutral is electronegativity. Electronegativity is a measure of an atom's ability to attract electrons towards itself. If the central atom has a high electronegativity, it will tend to pull the shared electrons towards itself, resulting in a polar bond. In the case of oxides, a polar bond will cause the oxygen atom to have a partial negative charge, making the oxide basic.

Conversely, if the central atom has a low electronegativity, it will tend to donate electrons, resulting in a nonpolar bond. In this case, the oxide will be neutral. Lastly, if the central atom has a medium electronegativity, the bond will be polar but not enough to make the oxide basic. In this case, the oxide will be acidic.
For example, in the oxide Na2O, sodium (Na) has a low electronegativity compared to oxygen (O), resulting in a polar bond where oxygen has a partial negative charge. Therefore, Na2O is a basic oxide. On the other hand, in the oxide CO2, carbon (C) has a medium electronegativity compared to oxygen, resulting in a polar bond that is not enough to make CO2 basic. Instead, CO2 is an acidic oxide.
In summary, electronegativity of the central atom determines the polarity of the bond between the central atom and oxygen, which in turn determines whether the oxide is acidic, basic, or neutral.

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Answer:

Freshwater ecosystem type

Explanation:

Freshwater ecosystem type is the factor that does not determine the strength of a toxic in an aquatic ecosystem.

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The rate determining step is; \(Ce^{4+} (aq) + Mn^{2+} (aq) ----- > Ce{3+} (aq) + Mn^{3+} (aq)\). option A

We know that in any sequence of reactions, the rate determining step is the slowest step of the reaction. In this case, the rate determining step would be the step that is first order in the cerium IV and first order in the Mn II.

When we look at the sequence of the reactions, we can see that the rate determining step has been described above and it is quite easy to spot in the sequence as shown. This is the step that would have the orders predicted above.

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Answer:

In particular, cesium (Cs) can give up its valence electron more easily than can lithium (Li). The easy of giving up an electron varies as follows: Cs > Rb > K > Na > Li with Cs the most likely, and Li the least likely, to lose an electron. In fact, for the alkali metals (the elements in Group 1). I hope I helped you.

Cesium gives the electrons more easily than rubidium .

Electrons are defined as  negatively charged subatomic particles that together with protons and neutrons forms an atoms nucleus.

Electrons are the smallest particles in an atom, and they have a negative charge.

The electron is the lightest and most stable subatomic particle.

Electrons are subatomic particles with an elementary charge of -1.

Neutrons are defined as subatomic particles that are one of the primary constituents of atomic nuclei.

Protons are defined as stable subatomic positively charged particles which are present in nucleus of an atom.

The trend of electron donation is

Cesium > Rubidium > Potassium > Sodium > Lithium

Thus, Cesium gives the electrons more easily than rubidium .

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Hydrogenated compounds, particularly hydrogen gas (H2), are often considered as potential fuels for spark ignition engines.

Hydrogenated compounds are considered the most suitable fuels for spark ignition engines because hydrogen is a highly flammable gas with a low ignition energy and a wide flammability range. When compared to gasoline or diesel, hydrogen has a higher energy content by weight, which makes it an attractive fuel choice.

Due to increasing temperature, the chemical reaction rate also increases as the element moves from a solid to a liquid to a gas.Physical state transitions are dependent on temperature, and the rate of chemical reactions that occur as a result of these state transitions is also influenced by temperature.

At higher temperatures, the chemical reaction rate typically rises as molecules have more kinetic energy and collide with one another more frequently.

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827.0 torr  is the total pressure, in torr, exerted by the gas mixture

The partial pressures of the individual gases make up the total pressure of the gas mixture.

Total pressure= sum of all partial pressure

Total pressure=423+149+255

Total pressure= 827.0 torr

Pressure is defined as force/area. To illustrate the pressure from snow on a roof, divide the weight of the snow by the surface area of the roof. Gases are a typical pressure source in chemistry. A "vacuum" is used to describe the absence of pressure. Humans have long held the belief that vacuums are both improbably rare and unnatural because "nature abhors a vacuum." Actually, this is not the case.

The number of pressure units is ridiculous. It's common to use the torr or mmHg unit. This discussion is solely focused on the height of a mercury column. The atmosphere contains 760 torr, or mmHg. You might also look at mmH2O, which makes use of a related idea.

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Answer:

The answer I would go with is A formation of a new substance.

Explanation:

This is because physical change includes changes of state. Some could be changing from a liquid to gas or solid to gas. B is not even an answer that should be considered because it doesn't fit into the category. C and D represents some of the examples of the process of physical change. Like boiling, bubbling, melting, or freezing. So the best would be A.

There are three types of rocks namley sedimentary rocks, metamorphic rocks and igneous rocks. They will interchange to each other by the process called rock cycle.

Rock cycle illustrates how the three primary types of rocks—sedimentary, metamorphic, and igneous—change over the course of geologic time. When a rock is pushed out of its equilibrium circumstances, it changes.

For instance, an igneous rock like basalt may disintegrate and evaporate when exposed to air or melt when it is subducted beneath a continent.

Rocks do not stay in an equilibrium state; rather, they change as they interact with new environments because of the driving forces of the rock cycle, plate tectonics, and the water cycle.

The rock cycle illustrates the relationships between the three types of rocks and the gradual transition of processes from one type to another.

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Answer:

three atoms = 1 water molecule

3 × 6 = 18 atoms

................

In summary, a bond having "more ionic" or "more covalent" character refers to the degree to which the bond is either purely ionic or purely covalent, with most bonds falling somewhere in between.

When a bond has more ionic character, it means that the electrons are transferred more completely from one atom to another, resulting in larger differences in electronegativity and a greater degree of charge separation between the atoms. This typically occurs when there is a large difference in electronegativity between the atoms involved in the bond.

On the other hand, when a bond has more covalent character, it means that the electrons are shared more equally between the atoms, resulting in a smaller difference in electronegativity and less charge separation. This typically occurs when the atoms involved in the bond have similar electronegativities.

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Answer:

True

Explanation:

ion: an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells. When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions.

The enthalpy change when 5 g of zinc metal is heated from 100°C to the point where the entire sample is melted is 1185.46 J.

The enthalpy change when 5 g of zinc metal is heated from 100°C to the point where the entire sample is melted can be calculated using the following formula:

ΔH = (5 g) x (0.388 J/g°C) x (419.5°C - 100°C) + (5 g) x (112.4 J/g)

ΔH = 5 g x 0.388 J/g°C x 319.5°C + 5 g x 112.4 J/g

ΔH = 623.46 J + 562 J

ΔH = 1185.46 J

Therefore, the enthalpy changes when 5 g of zinc metal is heated from 100°C to the point where the entire sample is melted is 1185.46 J.

The overall heat content of a system is represented by the thermodynamic quantity known as enthalpy. It is an energy-like property or state function that has dimensions similar to energy and is therefore measured in units of joules or ergs.

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The pH of a solution is calculated using the formula; pH = - log[H+] and water has a pH of 7.

The pH of a solution is the negative logarithm to base ten of the hydrogen ions concentration of the solution.

Where

For example, the pH of a 0.1 M HCl solution is calculated as follows:

[H+] of HCl = 1 × 10^-1

pH = - log (1 × 10^-1)

pH = 1

Water is a neutral solution. It has pH of 7.

Therefore, the pH of a solution is calculated using the formula; pH = - log[H+] and water has a pH of 7.

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Answer:

First one is 1, then +2 for the rest.

Explanation:

0.1 M HCI = 1

0.001 M HCI = 3

0.00001 M HCI = 5

Distilled water = 7

0.00001 M NaOH = 9

0.001 M NaOH = 11

0.1 M NaOH = 13

I got it wrong so ya'll could get it right x3

Answer:

C

Explanation:

Divide 35.47 by the molar mass

The density of an object is its mass divided by volume. The mass of a the stopper is given 5.06 g with a volume of 4.2 ml . Then the density of the stopper is 1.2 g/ml.

Density of substance is the measure of its mass per unit volume. It describes how closely its particles are packed. Density depends on the bond type, temperature and pressure.

Volume of the object is the space occupied by its particles. Volume can be expressed in L, ml, cm³, dm³ etc. Only solids and liquids has a definite volume and the volume of gases is that of the container.

Give that, volume of water = 45.2 ml

Total volume = 49.4 ml.

then volume of stopper = 49.4 - 45.2 = 4.2 ml.

Mass of stopper = 5.06  kg

density  =  mass/volume

             = 5.06 g / 4.2 ml

             =  1.2 g/ml

Therefore, the density of the stopper is 1.2 g/ml.

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The mass of methane (CH₄) which must be burned in order to liberate 12,880 kJ of heat is 231.9 g

A combustion reaction is a reaction in which a substance reacts with the oxygen and releases the energy in the form of light and heat.

Given data :

Heat energy liberated = 12,800 kJ

Δ Combustion = 891 kJ/mol

To calculate the mass of methane (CH₄) -

Number of moles of methane burned = Heat energy used

                                                                 Δ Combustion

Number of moles of methane burned = 12880

                                                                    891

Number of moles of methane burned = 14.455 mol

Since, Molar mass of methane is 16.043 g/mol

So, Mass of methane = Number of moles of x Molar mass of methane

                                          methane burned  

Mass of methane = 14.455 mol x 16.043 g/mol

Mass of methane = 231.9 g

Therefore, the mass of methane which must be burned is 231.9 g.

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A complex is a compound that is composed of a central metal atom/ion and then ligands.   MnO4- is a d^0 specie hence it has no d electron.

A complex is a compound that is composed of a central metal atom/ion and then ligands. These ligands may lead to the color of the complex. However, the color of complexes more commonly result from the d-orbital transition in the metal atom/ion.

Now we know that the neutral electron configuration of Mn is [Ar]. 3d5. 4s2. It then follows that MnO4- is a d^0 specie hence it has no d electron.

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Answer:

Option D

Explanation:

it has the same types of atoms on both sides of the reaction

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D) It has the same types of atoms on both sides of the reaction arrow.

Explanation:

This law was made by the Antoine Lavoisier in 1789. He want to confirm that the mass of reactant is equal to the mass of product and he was successful to carry out the test.

The metal that does not act as a sacrificial electrode for iron is C. Mn (Manganese).