What descriptive term is applied to the type of diene represented by 2,4-hexadiene?.

Answer:

jouls

Explanation:

it is joules because I payed attention in class

You will get iron sulfate and hydrogen sulfide gas (a.k.a. rotten egg gas).

FeS + H2SO4 = FeSO4 + H2S(g)

Change in Free Energy: ΔG(20C) = -66.6kJ (negative, so the reaction runs)

Change in Enthalpy: ΔH(20C) = -37.3kJ (negative, so the reaction is exothermic)

We'll begin by writing the balanced equation for the reaction between ferrous sulphide (FeS) and sulphuric acid (H₂SO₄). This is illustrated below:

FeS + H₂SO₄ —> H₂S + FeSO₄

Next, we shall determine the mass of FeS that reacted and the mass of H₂S produced from the balanced equation. This is illustrated below:

Molar mass of FeS = 56 + 32

= 88 g/mol

Mass of FeS from the balanced equation = 1 × 88 = 88g

Molar mass of H₂S = (2×1) + 32

= 2 + 32

= 34 g/mol

Mass of H₂S from the balanced equation = 1 × 34 = 34 g

From the balanced equation above,

88 g of FeS reacted to produce 34 g of H₂S.

Finally, we shall determine the mass of H₂S produced by the reaction of 4.4 g of FeS. This can be obtained as follow:

From the balanced equation above,

88 g of FeS reacted to produce 34 g of H₂S.

Therefore, 4.4 g of FeS will react to produce = (4.4 × 34)/88 = 1.7 g of H₂S.

Thus, 1.7 g of H₂S were obtained from the reaction.

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Answer:

strontium thats the alternative answer

Environmental changes affect animals depending on their ability to adapt to new conditions.

An adaptation is any type of phenotypic feature associated with a higher fitness in a particular environment.

Adaptations are features that allow organisms to adapt to challenging environmental conditions.

In conclusion, environmental changes affect animals depending on their ability to adapt to new conditions.

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According to the octet rule, atoms tend to achieve eight electrons in their outermost shell. So the correct answer is C. eight.

The octet rule is a chemical rule of thumb that states that atoms of low atomic number tend to combine in such a way that they each have eight electrons in their valence shells, giving them the same electronic configuration as a noble gas. The rule is applicable to the main-group elements, especially carbon, nitrogen, oxygen, and the halogens. It is based on the observation that when atoms have eight electrons in their outermost shell, they are chemically stable and less likely to react with other atoms.

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Answer:

3 electrons

Explanation:

Nitrate needs 3 electrons to achieve a stable electron configuration

Three is the answer. it needs three to complete its shell

In the ground state of an atom of silver (Ag), the number of electrons with the quantum number l = 1 is 18.

The lowest possible energy that an atom has is called the ground state. The electrons in the ground state of an atom are in their lowest energy orbitals. Electrons are in the ground state when they are not moving (not in motion). In an atom of silver (Ag), the electron configuration is [Kr] 4d10 5s1. The values of quantum numbers can be determined as:

n= 5 (From 5s1, the value of n is 5.)

l= 0, 1, 2, 3, 4 (For d orbitals, the value of l = 2,

hence for s orbital, l= 0 and for p orbital l = 1.)

ml = -1, 0, +1 (For p orbitals, the value of ml = -1, 0, +1.)

ms = +1/2 or -1/2 (There are two spin states of the electron, ms = +1/2 or -1/2.)

In the case of l = 1 (for p orbital), ml can be either -1, 0, or +1.

Hence, there are three possible orbitals (px, py, pz). Each orbital can accommodate two electrons. Therefore, the total number of electrons with l = 1 (for p orbital) is 3 × 2 = 6. The remaining electrons with l = 0 (for s orbital) and l = 2 (for d orbital) are 2 and 10, respectively.

Therefore, the total number of electrons in the ground state of an atom of silver (Ag) with the quantum number l = 1 is 6. Answer: c) 18.

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if ion x has a charge of 2 , and ion y has a charge of 1- the formula will be XY2. Positively and negatively charged ions can combine to produce compounds known as ionic compounds.

By losing electrons, positively charged ions are created. Gain of electrons results in the formation of negatively charged ions. The synthesis of ionic chemicals two negatively charged ions of Y are necessary for the creation of a neutral  ionic compound when they combine with an ion X that has a charge of 2+ and an ion Y that has a charge of 1-.

The ionic substance they produce has the following chemical formula:

X²⁺ + 2Y⁻ ---> XY₂

Consequently, XY2 is the ionic compound

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Answer:

1280J are required.

Explanation:

Heat of fusion is defined as the amount of heat required to change its state from liquid to solid at its melting point at constant pressure.

As heat of fusion of gold is 64J/g, there are required 64J to melt 1g of gold at its melting point. The energy required to melt 20g is:

20g * (64J/g) =

1280J are required

0.073 moles of ascorbic acid are needed to complete the prescription.0.4445×10²³ molecules are required .0.0014 molecules of aspartame are eaten.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons.

For 1st part, as 1 mole=176.14 g , thus, 13 g=13×1/176.14=0.073 moles, for 2 nd part, as 1 mole=6.023×10²³ molecules, 0.073 moles=0.073×6.023×10²³=0.4445×10²³ molecules, for 3 rd part, 1 molecule=176.14 g , thus 0.25 g = 0.25/176.14=0.0014 molecules.

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Answer: Hermaphrodite

hope this is helpful

The true statement is that the metal on the right oxidizes more easily than the one on the left.

Metal oxidation is known to often occur if an ionic chemical reaction is said to take place on a metal's surface at the presence of oxygen.

Note that Electrons often move from the metal to the oxygen molecules in course of this  process and as such The true statement is that the metal on the right oxidizes more easily than the one on the left.

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Answer:

Molarity is the amount (in mole) of solute in a solvent. If the solute is very volatile, then it will evaporated from the solution as temperature rising. So the amount of solute is decreasing, causing the molarity decreasing. If the solvent itself volatile, then the molarity will increase.

(Looked up the answer for you)

The relationship between evaporation and molarity is; the rate of evaporation of will decrease as the molarity increases

Molarity (M) is defined as the amount of a substance in a certain volume of solution. Molarity can also be defined as the number of moles of a solute per liters of a solution.

Now, the rate of evaporation of will decrease as the solute concentration increases due to the fact that for the same surface area for evaporation, as the concentration of the solute increases, less water molecules will get exposed to escape from the water surface.

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Answer:

false

Explanation:

magnetic field lines can be accurately observed using *iron filling*

Answer:

the answer is just put particles far aoart

Answer:

a) HCl

Explanation:

As we know, that HCl or Hydrogen Chloride is a diatomic compound. It is formed due to the Chemical reaction of Hydrogen and Chlorine. As both Hydrogen and Chlorine have valencies of 1, the Net Valency of the Compound HCl is 1 itself. This separates it from the rest of the compounds. The rest of the compounds need to have more than 2 atoms of each kind and have different valencies too.

Answer:

8.76

Explanation:

4 NA + O2 -> 2Na2O

6.5/23= .283 mols of Na

.283 x (2/4) = .1413 mols of Na2O

.1413mols x 61.98 g/mol of Na2O = 8.76 g of Na2O

Given:

Crystal shield (CuSO4 . 5H2O) dissolves in water in the large tank.CuSO4′5H2O(s) → CuSO4 (aq) + 5H2O(l)0.01 mm = thickness of film layer24.3 g crystal/100 g water at 275 K, density 1140 kg/m3Diffusion of CuSO4 in dilute aqueous solution 3.6x10-10 m2/s at 275 K

Concentration can be taken at an average of 55.93 kmol/m3, water density 1000 kg/m3The mass of CuSO4 that dissolves per unit area per unit time is called flux.The transfer rate per unit area from the crystal surface to the bulk solution is given by;\(\frac{dn}{dt} = D.

A\frac{dc}{dx}\)Where, D is diffusion coefficient A is the area of the interfacec is the concentration of the diffusing species in the filmx is the direction of diffusion

From the given data, crystal density can be calculated as;\(\frac{24.3}{100+24.3}=0.1955\)

Now, we can calculate the mass transfer flux from the given data;\(\frac{55.93}{159.61}=\frac{C_{CuSO_4}}{1140}\)\(C_{CuSO_4}=39.76 kmol/m^3\)\(J = -D\frac{dc}{dx}\)

Since the inner film is saturated, \(c_0 = 39.76 kmol/m^3\)

At the outer surface, there is no CuSO4 present and the concentration gradient is;\(\frac{39.76-0}{0.01*10^{-3}}= 3.976*10^6 kmol/m^4\)\(J = -3.6*10^{-10}*3.976*10^6\)\(= -1.43456*10^{-3} kmol/m^2s\)

Thus, the mass transfer flux is -1.43456 * 10^-3 kmol/m^2s.

The transfer rate per unit area from the crystal surface to the bulk solution is -1.43456 * 10^-3 kmol/m^2s.

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The pH of a solution is defined as the negative logarithm (base 10) of the hydronium ion concentration: pH = -log[H3O+]. Thus, we can rearrange this equation to find the concentration of hydronium ions:

[H3O+] = 10^(-pH)

Plugging in the given pH value of 4.282, we get:

[H3O+] = 10^(-4.282) = 3.564 x 10^(-5) M

Therefore, the concentration of hydronium ions in the solution is approximately 3.564 x 10^(-5) M, which corresponds to answer choice (d).

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Answer:

A. Food

Explanation:

Water alone does not give energy, Carbon Dioxide cannot be consumed healthily, and photosynthesis is for plants.

Non-combustible

eg:-glass,water,stone, Portland cement etc ...

Answer:

Noncombustible

Explanation:

So

Some examples are ,glass ,stone

A single replacement reaction is a type of chemical reaction that takes place when one element in a compound is replaced by another element. In other words, in this reaction, one element is replaced by another element. There are a few ways to predict whether or not a single replacement reaction will occur.

These ways are explained below: Paying Attention to ReactantsThe first way to predict if a single replacement reaction will occur is by paying attention to the reactants. In a single replacement reaction, a more reactive element will replace a less reactive element. For example, if a metal element is mixed with an aqueous solution that contains ions of another metal, a single replacement reaction will occur if the metal in the solid state is more reactive than the metal in the solution state. For instance, if you put zinc in copper sulfate, a reaction will occur because zinc is more reactive than copper. Therefore, it will replace copper, producing zinc sulfate and copper.Using the Activity SeriesAnother way to predict if a single replacement reaction will occur is by using the activity series. The activity series is a list of metals and their ability to replace other metals from their compounds. This list is arranged in order of decreasing activity. Therefore, if a metal is more active than another metal on the activity series, it will replace that metal from its compound. For example, if you put magnesium in silver nitrate, a reaction will occur because magnesium is more reactive than silver. Therefore, magnesium will replace the silver, producing magnesium nitrate and silver. If the metal is less active than another metal on the activity series, no reaction will occur.Using Electrochemical SeriesThe electrochemical series is another way to predict if a single replacement reaction will occur. The electrochemical series lists the elements in order of their standard reduction potentials. A metal with a higher reduction potential will replace a metal with a lower reduction potential from its compound. For instance, if you put copper in magnesium sulfate, no reaction will occur because copper has a lower reduction potential than magnesium. Therefore, magnesium will not replace copper from its compound.

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The pH of a solution is a measure of its acidity or alkalinity. Using the pH formula, the pH values can be calculated for different concentrations of HCl, a strong acid. Therefore,

a. 0.01 M HCl has a pH of approximately 2.

b. 0.0000001 M HCl has a pH of approximately 7.

c. 1 M HCl has a pH of 0.

The pH of a solution can be calculated using the formula pH = -log[H⁺], where [H⁺] represents the concentration of hydrogen ions in moles per liter (M). Using this formula, we can calculate the pH for each given concentration of HCl:

a. 0.01 M HCl:

Since HCl is a strong acid that dissociates completely in water, the concentration of hydrogen ions is equal to the concentration of HCl. Therefore, the pH can be calculated as:

pH = -log(0.01) ≈ 2

b. 0.0000001 M HCl:

Similarly, for this concentration, the pH can be calculated as:

pH = -log(0.0000001) ≈ 7

c. 1 M HCl:

Again, since HCl is a strong acid that dissociates completely, the concentration of hydrogen ions is equal to the concentration of HCl. The pH can be calculated as:

pH = -log(1) = 0

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Answer:

80L

Explanation:

V1/T1 = V2/T2

V2 = V1 T2/T1

T1 = 300K

V1 = 60L

T2 = 400K

V2 = ?

V2 = V1 T2/T1

V2 = (60L)(400K) / (300K)

V2 = 80L

Answer:

isobar

Explanation:

edge 23

Before using the flask, inspect it for cracks or imperfections. Use a clamp for stability when suspending the flask on a ring stand. Never heat a flask that is closed.

In a laboratory, glassware is the most prevalent item. Kitchen glassware used in homes is very different from laboratory glassware, which is made for specific uses and necessitates careful handling. It's vital to remember that scientific equipment, such as glassware, should only be used in laboratories and should never be utilized outside of the home.

Heat must be added to liquid mixes in decreased temperatures for rotary vacuum evaporators. Apply tape or screen protectors to the flask's spherical bottom to reduce harm from inadvertent breaks. Additionally, the recommended vacuum limitations shouldn't be exceeded.

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Like any equilibrium constant, Kw increases with increasing temperature. This means that as heat is added, the concentration of the products increase (since Kw is equal to the product of H+ and OH-).

Chemical equilibrium refers to the situation in a chemical reaction where both the reactants and products are present in concentrations that have no further tendency to change over time, preventing any discernible change in the system's properties. When the forward reaction and the reverse reaction go forward at the same speed, this condition results. The forward and backward reactions typically have equal, if not zero, reaction rates. The concentrations of the reactants and products do not change on a net basis as a result. Dynamic equilibrium is the name given to such a situation.

As a result of Berthollet's discovery that some chemical processes are reversible, the idea of chemical equilibrium was created in 1803.

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Answer: 42.14 g

Explanation:      calcium nitrate -  \(Ca(NO_{3} )_{2}\)

                   , the molar mass of calcium nitrate = 164 g

                   mass required =\(0.257*164\)

                                               =\(42.14\) g