Hi, can someone please help me out with finding the answers.
write the IUPAC name and the Molecular formula ​

A chemist adds a buffer to a solution because the buffer can keep the pH stable when small amounts of acid or base are added. Thus, Option A is correct.

Buffer is a solution that resists the change in pH when acid or alkali is added in a small amount. Buffer is made up of weak acid and its conjugate base or a weak base and its conjugate acid. It absorbs H+ and OH- ions when strong acid or alkali is added so that the pH remains the same and neutralizes the added acid or alkali. While maintaining the pH of the solution, the pH of the buffer changes in a small amount.

Thus, a chemist adds a buffer to a solution to keep the pH constant when strong acid or base is added.

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Gas chromatography-mass spectrometry (GC-MS) is an analytical method that combines both the mass spectrometer and the gas chromatograph to separate the chemical components of a sample mixture to detect the presence and then identify the compound.

Gas chromatography-mass spectrometry (GC-MS) can be described as an analytical method that combines the characteristics of gas chromatography and mass spectrometry to identify various substances within a test sample.

Applications of GC-MS include fire investigation, drug detection, environmental analysis, and identification of unknown samples, including that material samples.

The GC-MS is made of two major blocks: the gas chromatograph and the mass spectrometer. The gas chromatograph uses a capillary column whose features regarding molecule separation depend on the column's dimensions as well as the phase properties.

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The mass of iron (II) oxide that must be used to produce 10.6 g of iron would be 14.37 grams.

Iron is produced from iron (II) oxide by reacting with carbon monoxide according to the following equation:

[tex]Fe_2O_3 + 3CO -- > 2Fe + 3CO_2[/tex]

The equation already obeys the law of conservation of atoms. Hence. it is a balanced equation.

The mole ratio of iron (III) oxide that reacts and the iron that is produced according to the equation is 1:2.

Now, in a particular reaction involving iron (III) oxide and carbon monoxide, 10.6 grams of iron were produced. The amount of iron (III) oxide used can be obtained using the mole ratio from the balanced equation of the reaction.

Recall that: mole = mass/molar mass

Molar weight of iron = 56 g/mol

Mole of 10.6 g of iron = 10.6/56

                                    = 0.19 moles

Since the mole ratio is 1:2, the equivalent mole of iron (III) oxide that reacts can be obtained:

                  0.19/2 = 0.09 moles

Molar mass of iron (III) oxide = 159.69 g/mol

Mass of 0.09 mol iron (III) oxide = 0.09 x 159.69

                                                    = 14.37 grams

Thus, the amount of iron (III) oxide that must be used to produce 10.6 g of iron would be 14.37 grams.

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The balanced equation by hit and trial method is:

Zn + 2HCl → ZnCl2 + H2

Because a metal is replaced by another metal, the interaction between hydrochloric acid and zinc produces a single-displacement reaction.

This can be shown by,

B + CD → BD + C

There are two requirements: either B and D must be different metals (or any element that may form a cation, such as a hydrogen), while C must be an anion, or B and D must be halogens, while C must be a cation.

Count the Zn, Cl, and H atoms on each side of the chemical equation to balance the HCl-Zn reaction equation. To balance the equation, just alter the coefficients or the numbers that come before the atoms or compounds. The equation appears as follows after the coefficients have been changed:

ZnCl2 + H2 → Zn + 2HCl

Balance the molecular equation first.

Zn + 2HCl → ZnCl2 + H2

The net ionic equation will be, once the number of ions on both sides of the reaction is equalized by crossing them out.

Zn + 2H+ + 2 Cl– → Zn2+ + 2Cl– + H2

The balanced equation will be,

Zn + 2HCl → ZnCl2 + H2

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The balanced equation for the redox reaction, which takes place in a basic solution is:

A balanced equation for a redox reaction is one in which the electrons transferred are balanced and the atoms involved in the reaction are also balanced.

To balance redox reactions in a basic solution, OH⁻ ions and H₂O are placed on appropriate sides of the reaction.

Considering the given reaction:

Cr(OH)₃ + ClO₃⁻ (aq) → CrO₄²⁻ (aq) + Cl⁻ (aq):

The balanced equation will be:

2 Cr(OH)₃ + ClO₃⁻ (aq) + 4 OH⁻ → 2 CrO₄²⁻ (aq) + Cl⁻ (aq) + 5 H₂O

The electrons transferred and the atoms involved are balanced.

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Gold and copper were the first forms of matter investigated by humans because they were pretty and have a shiny appearance.

Gold and copper have a shiny face and they were used in the production of ornaments and jewelry. Along with jewelry many other precious items were made from gold and copper. Gold and copper were so valuable forms of matter and they are also economically used by many countries. Gold was mostly used in making of ornaments and copper was used in making of frames.

In today's modern world mainly gold is one of the most precious element which is obtained for economical use.

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Knowing the heat capacity of the water, we know that  the heat absorbed is  1.83 * 10^4 J.

We know that water can be able to absorb heat when it is heated and the heat that is absorbed can be able to change the state of the water. We are now going to see how we can be able to obtain the heat that is absorbed by the water.

Then;

H = mcdT

H = heat absorbed

m = mass of the water

c = heat capacity of water

dT = temperature change

Given that mass of the water = 59.5 g we can write;

H = 59.5 g * 4.18 * (100 ∘C - 26.5 ∘C)

H = 1.83 * 10^4 J

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Answer:

the same kind of atoms

Explanation:

the same kind of atoms

Answer:

Javier's model is better, as the ball-and-stick model shows distinct differences in bond, whereas Carlos' model just shows them as differently colored circles.

Answer:

Distillation is the process of obtaining a liquid from a mixture containing a dissolved solute. The mixture is heated at a temperature just before the boiling point of the liquid. It evaporates and the vapor travels into a condenser flushed with cold water along the outside. The vapor loses its heat energy and cools into a liquid state. It then falls into a beaker on the other end as a distillate.

An example is desalination, where water is removed from seawater.

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A 10-kg bag of goods on a shelf one meter above the ground has a gravitational potential of GPE= (10 kg)(9.8 m/s2) (1 m) GPE= 98

GRAVITATIONAL POTENTIAL: the energy possessed or acquired by an object due to a change in its position when it is present in a gravitational field. In simple terms, it can be said that gravitational potential energy is an energy that is related to gravitational force or to gravity

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The solubility product (Ksp) at the given temperature is 2.27×10⁻²⁴

We'll begin by writing the dissociation equation of aluminum hydroxide, Al(OH)₃. This is shown below:

Al(OH)₃(aq) <==> Al³⁺(aq) + 3OH⁻(aq)

Finally, we shall determine the solubility product (Ksp). This is illustarted below:

Ksp = [Al³⁺] × [OH⁻]

Ksp = 8.70×10⁻¹³ × 2.61×10⁻¹²

Ksp = 2.27×10⁻²⁴

Thus, we can coonclude that the solubility product (Ksp) is 2.27×10⁻²⁴

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Spontaneous reaction is a reaction that occurs without the addition of energy

There are two types of reactions in thermodynamics:

Endothermic reactions -

Exothermic reactions -

Thus we can conclude that spontaneous reaction is a reaction that occurs without the addition of energy

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Density = mass/Volume    or    D = m/V  

Given:  V = 22.3 gal

           D = 0.8206 g/mL

1)  Rearrange the equation to solve for m

2)  Find conversion factor(s) and convert V from gal to mL (by dimensional analysis) so the units cancel

3)  Solve for m in g

4)  Find conversion factor(s) and convert m from g → lbs

1)  D = m/V  rearranges to  m = D ∗ V

2)  1 gal = 3.785 L  and  1 L = 1000 mL;     22.3 gal  ∗  3.785  L/1 gal  ∗  1000 mL/1 L   =  84 406 mL

3)  m =  0.8206 g/mL  ∗  84 406 mL    =  69 260 g

4)  1 lb = 453.6 g;   69 260  g  ∗  1 lb/453.6 g   =  153 lbs

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Answers answer questions and

Fats can be broken apart in a process called saponification, which most likely will occur in an aqueous solution of a strong base at a temperature near 100°C (Option B).

The chemical process of saponification refers to the hydration capable of breaking down different types of ester chemical bonds between the subunits of a lipid molecule, which may be composed of fatty acid chains and or a glycerol backbone.

The chemical process of saponification is enhanced by the presence of a strong base and high temperature capable of denaturing the chemical bonds of the lipid molecule.

Therefore, with this data, we can see that the chemical process of saponification is most likely to occur in presence of a strong base that breaks the ester bonds of the lipid molecules, which are generally composed of a glycerol backbone.

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Answer:

search on YT Khan academy work done by gravity

Explanation:

you will get it for sure with best explanation

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87420 g  CO and 12580 g H2 mass would be needed to produce 100.0 kg of methanol in CO + H2 = CH3OH.

The atomic mass of an element refers to the mass of the constituents that make up its atom. A multiple of 1.992646547 1023 gram, or more specifically, 1.992646547 gram, is used to denote one-twelfth of the mass of the carbon-12 atom, which has an ascribed atomic mass of 12 units. On this scale, one atomic mass unit is equal to 1.660539040 1024 grammes (amu). In honour of English physicist John Dalton, the atomic mass unit is occasionally called the dalton (Da).

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Lead (Pb )is oxidised and Iodine(I) reduction in the given reaction.

What is oxidation and reduction of elements?

An increase in an element's oxidation state or the loss of electrons is referred to as oxidation.

Gaining electrons or lowering an atom's oxidation state are both considered to be reductions in the context of chemical reactions.

Pb + 2l2 gives Pbl4

The oxidation number of  lead in non bonded form is zero. In PbI4 oxidation number of lead is + 4.There is an increase in the oxidation number. The oxidation number of iodine in free state is zero. Whereas in P I4 oxidation number iodine is -1, there is a decrease in oxidation number.

Hence, lead (Pb )is oxidised and iodine(I) is reduced in the given reaction.

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In the given balanced redox reaction, Pb is oxidised and I is reduced.

What are redox reactions?

From the given balanced redox reaction

Pb + 2 Cl₂ ⇄ PbCl₄

We can identify and write balanced half-reactions describing the oxidation and reduction that happen in this reaction.

Oxidation: Pb → Pb⁴⁺ + 4 e⁻

Reduction: 2 I₂ + 4 e⁻ → 4 I⁻

From the half reactions it is determined that Pb is oxidized and its oxidation number increases from 0 to 4+ while I₂ is reduced and its oxidation number decreases from 0 to 1-.

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Yes, a chain reaction can only  be carried out using just one atom.

We know that a chain reaction has to do with the type of reaction in which there is a a continuous self sustaining reaction. In this kind of reaction, there is one radioactive material that is bombarded by a particle such as a neutron. The bombardment of the particle would make the a cycle of reactions to begin which is able to sustain itself.

Given the fact that we only need to have a single radioactive atom that is bombarded for the process of radioactivity to occur tell us that it is a process that requires just one atom.

Take for instance, all we need is one Uranium fuel that would be bombarded with neutrons in order to have a chain reaction that involves  uranium.

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Hello!

Answer:

True :P

According to the concept of molar concentration, the molarity of phosphoric acid solution is 0.0589 M.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.In case where two solutions are given, molarity of one solution is obtained as, M₁V₁=M₂V₂

Substitution in above formula gives, 0.0431×34.21/25=0.0589 M.

Thus the molarity of phosphoric acid is 0.0589 M.

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sodium + water + - sodium hydroxide + hydrogen is the word equation  to produce sodium hydroxide and hydrogen gas.

Option B is correct.

A colorless solution of sodium hydroxide (NaOH) and hydrogen gas is created when sodium metal interacts quickly with water (H2).It is an exothermic process.

Na+ and OH- ions result from the reaction NaOH and H2O. Heat will be released because the process is exothermic. Since sodium hydroxide is regarded as a strong base, it can completely and entirely dissociate in aqueous solution.

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Answer: calcium

Explanation:

Answer: gain 3

Explanation:

elements want to have a total of 8 valence electrons to become stable like the noble gases! Hope this Helps.

K₄ [Fe (CN)₂] is a coordination compound where the oxidation number of Fe is -2. But the negative charge for metal iron is not possible and the actual formula is K₄ [Fe (CN)₆] .

A coordination compound is a complex where an ionic or neutral ligand is coordinated to a metal. The oxidation state of the metal is called the primary valence of the complex.

Here, there are 4 potassium outside the coordination sphere and thus +4 charge is outside hence -4 charge have to be inside to neutralize the compound. The charge of one CN is -1. Thus -2 for two CN.

Total charge is -4 and that of 2CN is -2, thus charge of Fe is -4-(-2) = -2.

Actually this compound do not exists. The correct coordination formula is K₄ [Fe (CN)₆] where Fe is +2 oxidation state.

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The maximum possible efficiency of the heat engine that uses reservoirs at 800°C and 0°C is 74%.

Maximum efficiency is mainly calculated for heat engines.

Let the starting temperature be T1 and the 2nd temperature is T2.

Since the given temperatures are in Celcius form, we have to first convert the temperatures into Kelvin form for proper calculation of maximum efficiency.

So, T1 = 0 + 273 = 273 K

T2 = 800 + 273 = 1073 K

We know,

Maximum efficiency = (T2- T1)/T2

= (1073 - 273) / 1073

= 800 / 1073

= 0.74

= 74 %

Therefore, the maximum efficiency of the heat engine will be 74%.

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