what is the difference between an ore vein and a disseminated deposit? which ones are easier to mine?

Solution. Its particle structure of CaCl2 is as follows: To create an ionic bond with the two chlorine atoms, each calcium atom transfers his two electrons to them.

Explanation: The periodic table's group 2 element calcium, symbolised as Ca, has two electrons inside its own outer shells. Calcium must shed these two extra electrons, also known as valence electrons, in order to create a complete octet.

Calcium chloride (CaCl2) is created by the reaction of limestone (CaCO3) with hydrochloric acid (HCl). You can write the chemical equation like this. It is also created as a substantial by-product in the Lasting effect, which involves mixing limestone with NaCl solution to create soda ash Na2CO3.

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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.

The pH of the weak acid solution is 1.80, which indicates that the concentration of H+ ions is 10^-1.80 M. The Ka of the unknown weak acid is 8.6 x 10^-5.

Since the weak acid is not fully ionized, the concentration of the acid [HA] is equal to the initial concentration of the weak acid, which is 0.085 M. We can use the equation for the ionization of a weak acid to find the Ka value:

HA + H2O ↔ H3O+ + A-

Ka = [H3O+][A-]/[HA]

Substituting the values into the equation, we get:

Ka = (10^-1.80)(10^-1.80) / 0.085

Simplifying the equation, we get:

Ka = 8.6 x 10^-5

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Answer:

yes because wet is water

Answer: Being a liquid, water is not itself wet, but can make other solid materials wet. Wetness is the ability of a liquid to adhere to the surface of a solid, so when we say that something is wet, we mean that the liquid is sticking to the surface of a material.

The equator is a hypothetical line passing through the center of the planet at latitude 0°. The Northern Hemisphere and the Southern Hemisphere are the two equal halves of the earth that are separated by the equator.

Greater gravitational force is exerted on the mass of denser objects and materials. This explains why materials with varying densities stack together  

At a transform plate border, the grinding motion between the plates causes shallow earthquakes, significant lateral rock displacement, and a wide zone of crustal deformation. Along the San Andreas Fault in western California, a landscape of this kind may be seen more spectacularly than anywhere else on Earth.

The inner core and the outer core, which encircle the mantle, are the two layers that make up the core. The Bullen discontinuity is the line dividing these two regions. Radius Core The 2,200 kilometers (1,367 miles) thick outer core is primarily made of liquid nickel and iron.

What layers of the Earth is represented by layer 1 and layer 2?

Composition-based Layers

The following layers are visible in a cross section of the Earth: First, there is the crust, followed by the mantle, the outer core, the inner core, the lithosphere, the asthenosphere, the outer core, and the inner core. Based on composition, the earth's core, mantle, and crust are divided: Less than 1% of the mass of Earth is made up of the crust.

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Explanation:

(1) they are heterogenous mixture

(2) the size of particles of colloids is too small to be seen by bare eyes.

(3) they scatter light passing through them making it's path visible.

Answer:

3,3-dimethyl hexane

Explanation:

                        CH3

         I     I     I     I     I    I

      - C - C - C - C - C - C-

         I     I     I     I     I    I

                        CH3

The concentration of lawsonia in solution is 1.6×\( {10}^{-4} \) M

The concentration or molarity is calculated by the formula -

Molarity = number of moles of lawsonia ÷ volume in litres.

Number of moles = mass ÷ molar mass

Mass of lawsonia in grams -

Mass = 0.001425 grams.

Molar mass = 174.15 g/Mol

Number of moles = 0.001425 ÷ 174.15

Performing division on Right Hand Side

Number of moles = 8.18×\( {10}^{-6} \)

Volume of solution in litres = 0.05 litres

Molarity = 8.18×\( {10}^{-6} \) ÷ 0.05

Performing division

Molarity = 1.6×\( {10}^{-4} \) M

Hence, the Molarity is 1.6×\( {10}^{-4} \) M.

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Answer:

Structural formulas are helpful because they explain the properties and structure of the compound which empirical and molecular formulas cannot always represent.

Explanation:

HOPE ITS HELPFUL FOR U

The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration

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Answer:

A and C

Explanation:

I just took the quiz

The factors affect the amount of thermal energy an object has:

Factors that affect the amount of energy are:

A measure of the kinetic energy of the particles that make up a material. The movement of heat energy from a warm object to a cool object. Transmission of thermal energy from one object to another by electric waves. Transmission of thermal energy between objects by particle collisions.

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Answer:

AMBANTOT MO MALIGO KANA

Answer:

Why would the addition of alkali to this system lead to less CO2 (aq) being present? Because the alkali would neutralise the acid in the system. This would reduce the concentration of acid in the system.

hope it helps you and have a nice day

When we draw a potential energy (PE) curve for the interaction of two atoms, we are essentially plotting the energy of the system as a function of the distance between the two atoms.

In the case of Ne and Xe, the PE curve for both atoms will have a similar shape, but the relative depths of the potential wells and the positions of the minima along the x-axis will differ.
The relative depths of the potential wells represent the stability of the interaction between the two atoms. A deeper potential well indicates a more stable interaction, while a shallower potential well indicates a less stable interaction. The relative depths of the potential wells for Ne and Xe will be different due to the differences in their atomic radii. Xe is a larger atom than Ne, and therefore the attractive forces between the two atoms will be stronger, resulting in a deeper potential well.

The relative positions of the minima along the x-axis represent the equilibrium bond distance between the two atoms, which is the distance at which the potential energy is minimized. The equilibrium bond distance for Xe will be greater than that for Ne due to the larger atomic radius of Xe. This means that Xe atoms will be more likely to form bonds at longer distances than Ne atoms.

In summary, the PE curves for Ne and Xe will have similar shapes but different relative depths of potential wells and positions of minima due to the differences in their atomic radii. Xe will have a deeper potential well and a greater equilibrium bond distance than Ne.

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In addition to other natural and human-made processes, the burning of organic materials is the main source of formaldehyde formation.

The simplest of the aldehydes, formaldehyde (HCHO), commonly known as methanal, is an organic molecule utilized in huge quantities during numerous chemical industrial processes. It is often supplied as formalin, an aqueous solution with a 37 percent concentration, and is primarily manufactured via the vapor-phase oxidation of methanol.

Industrial production of formaldehyde involves the catalytic oxidation of methanol. The most often used catalysts are iron(III) oxide, iron molybdenum oxides, and silver metal [e.g. Vanadium oxides or iron(III) molybdate with a molybdenum-enriched surface. Methanol and oxygen react at around in the commonly used formox process.

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Answer:

Chemical Change

Explanation:

apples turn brown because of a chemical reaction named oxidation which is cause by oxygen of the air

Oxygen is one of the most reactive chemicals known to exist.. There are a variety of oxidation reactions .. The fridge does not stop chemical reactions so bacteria will still rot the food eventually and out side of the fridge it would rot quicker than the fridge .

Answer:

Chemical change

i got it right

Explanation:

Answer:

3.87 mol N

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

54.2 g N

Step 2: Identify Conversions

Molar Mass of N - 14.01 g/mol

Step 3: Convert

\(54.2 \ g \ N(\frac{1 \ mol \ N}{14.01 \ g \ N} )\) = 3.86867 mol N

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

3.86867 mol N ≈ 3.87 mol N

The balanced chemical equation for the standard formation reaction of solid water is: H₂ (g) + 1/2O(g) → H₂O(s)

The standard formation reaction of solid water is: H₂ (g) + 1/2O₂(g) --> H₂O(s)

The balanced chemical equation for the standard formation reaction of solid water is: H₂ (g) + 1/2O(g) → H₂O(s)

The standard enthalpy change of the above reaction can be determined from the enthalpies of formation of the products and reactants using Hess's Law.

Standard enthalpy of formation (∆Hfo) is defined as the amount of heat absorbed or released when one mole of a substance is formed from its constituent elements in their standard states under standard conditions (∆Hfo=0 at 298 K and 1 atm).

Since H₂O(s) is the standard state of water, its standard enthalpy of formation (∆Hfo) is -285.8 kJ/mol. This means that the formation of one mole of solid water releases 285.8 kJ of heat energy.

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Explanation:

solubility of potassium nitrate (KNO3) at 5 oC ~ 24 g/100 mL H2O The solubility of potassium nitrate (KNO3) at 25 oC ~ 40 g/100 mL H2O Potassium nitrate (KNO3) is a solid.

Answer:ΔG°  = 1022. 8 kJ

ΔH° = –199 kJ/mol

ΔS° = –4.1 J/K·mol

T = 25°C = 25 + 273 = 298K (Converting to kelvin temperature)

ΔG° = ?

Explanation:The relationship between these varriables are;

ΔG° = ΔH°  - TΔS°

ΔG° = –199 - 298 (–4.1)

ΔG° = -199 + 1221.8

ΔG°  = 1022. 8 kJ

sorry if uncorrect

Answer:

A

No, because the number of carbon, hydrogen & oxygen atoms on both sides of the equation are not equal.

Hope this helps!

Hydrocarbons that lack π bond are called saturated hydrocarbons or alkanes

Therefore, Hydrocarbons that lack π bond are called saturated hydrocarbons

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The answer to this question is option no. d that is π bonds and alkanes.

What are hydrocarbons?

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Answer:

c is the answer

step by step explanation is not

The formula which represent a hydrocarbon with a double covalent bond is C₂H₄.

Hence, option D is correct answer.

A double covalent bond is a type of covalent bond which involves the sharing of two pairs of electrons.

A covalent bond is a type of chemical bond that involves the sharing of electron pairs between the atoms.

Now lets check all options one by one

Option (A): CH₃Cl

In CH₃Cl carbon has 4 valence electrons and carbon shares its 1 electron each with three hydrogen atoms and carbon shares its 1 electron with chlorine. Here bonds are formed due to sharing of electrons between the atoms. Hence CH₃Cl is covalent bonded.

So, it is incorrect option.

Option (B): C₂H₃Cl

In  C₂H₃Cl, here two carbon atoms form double bond but they not form covalent bond.

So it is incorrect option.

Option (C): C₂H₂

In C₂H₂, each carbon has 4 valence electrons and each carbon shares its   one electron with each hydrogen atom here two carbon atoms are triple bonded.

So, it is incorrect option.

Option (D): C₂H₄

In C₂H₄, there are two carbon atoms and two hydrogen atoms, here two carbon atoms are double bonded.

So, it is correct option.

Thus, from above conclusion we can say that The formula which represent a hydrocarbon with a double covalent bond is C₂H₄.

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Sulfur is less reactive than chlorine because chlorine only needs to lose one electron to become stable but sulfur needs to lose two electrons to become stable. As a result, chlorine is more reactive than sulfur.

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Health hazards that are associated with uranium mining

Uranium is a radioactive substance that is used for generation of the thermal energy in the nuclear power plant. But uranium mining and processing is associated with numerous health effects related with the exposure to the radioactive decay products. The person may either inhale, ingest or the toxins can also seep inside the tissues through cut. The radioactive waste are responsible for causing drastic mutations and cancer.

The process of removing uranium ore from the earth is known as uranium mining. In 2019, 53,656 tonnes of uranium were produced globally. The top three uranium producers are Kazakhstan, Canada, and Australia, who together produce 68% of the world's uranium.

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The acceleration due to gravity on the massive planet is 39.48 m/s².

The period (T) of a simple pendulum is given by:

T = 2π√(L/g),

where L is the length of the pendulum and g is the acceleration due to gravity.

In this scenario, we are given that the period of the pendulum (T) is 1 second and the length of the pendulum (L) is 1 meter.

So, substituting these values into the equation:

1 = 2π√(1/g)

Simplifying this equation :

g = (4π²) / (1²)

g = 4π² m/s²

g ≈ 39.48 m/s²

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The correct answer is option d) The signal is split in three, but only two hydrogens give rise to the signal.

When a molecule is placed in a magnetic field and subjected to radio frequency radiation, its protons absorb energy and transition from a low-energy spin state to a high-energy spin state. The energy required for this transition is proportional to the strength of the magnetic field and the frequency of the radiation.

In ethanol, there are two types of hydrogen atoms: the methyl group (-CH3) and the hydroxyl group (-OH). The hydrogen atoms in the methyl group are equivalent and produce a single peak in the NMR spectrum, while the hydrogen atom in the hydroxyl group produces a separate peak at around 3.7 ppm.

However, the hydroxyl group proton is not in a chemically equivalent environment because of the presence of neighboring methyl protons. The interaction between these neighboring protons causes the hydroxyl group proton to split into a triplet, with two of the peaks being of equal intensity and the third peak being weaker.

Thus, the peak at 3.7 ppm in the NMR spectrum of ethanol is split into three peaks, but only two of the hydrogens give rise to the signal. This is because the hydroxyl group proton is split by the two equivalent methyl protons. Therefore, option d) is the correct deduction about the peak splitting for the signal in ethanol at 3.7 ppm.

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