How cold does it really get on Pluto's moon, Charon? (I know this is not a Chem question per se, but is there no Earth Science, nor Space, nor Astronomy, nor General Science category on Brainly?)

Explanation:

STEP 1- Take two iron nails.

STEP 2- Clean it with sand paper.

STEP 3- Wrap copper wire around both the nails. And connect the other end to the battery terminal.

STEP 4- Take water in beaker and little amount of salt in it or a few drpos of sulphuric acid in it.

STEP 5- Immerse the nails in the solution.

STEP 6- Observe the nails carefully. You can see bubbles of gases coming out from water near nails.

When, electeric current is passed through water gases like hydrogen and oxygen are evolved.

2.Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.

When iron is placed in Copper sulphate solution, the iron is coated with a brown coloured substance "copper" and CuSo4 solution changes from blue to light green. This is due to iron displaces copper as it is more reactive than copper.

There are three unpaired d-electrons in the octahedral high-spin cobalt(iii) complex ion, [CoF6]3- (small ligand field splitting).

In an octahedral high-spin cobalt(iii) complex with small ligand field splitting, the d-electrons occupy the t2g and eg orbitals. As all six ligands are small, they generate a weak ligand field, which results in the energy difference between the t2g and eg orbitals being small, allowing for a high-spin configuration. Cobalt(iii) has five d-electrons, which fill the t2g orbitals first with three electrons, leaving two unpaired electrons in the eg orbitals. Therefore, the complex has three unpaired d-electrons. There are three unpaired d-electrons in [CoF6]3- due to high-spin configuration and weak ligand field splitting, causing a small energy difference between the t2g and eg orbitals.

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Answer:

Option C

Explanation: Pass me the brainliest I only need 1

Answer:one atom

Explanation:

The carbon symbol is C so only one

Calcium has 1 atom

Oxygen has 3 atoms

Answer:

Only one Carbon atom

Explanation:

CaCO3 is composed of one atom of Calcium, one atom of Carbon and three atoms of oxygen

The balanced chemical equation represents the stoichiometry of the reaction and ensures that the number of atoms of each element on both sides of the equation is equal, which is necessary for the conservation of mass during a chemical reaction.

The balanced chemical equation for the reaction of dichromate ion [(Cr2O7)2-] with hydrogen peroxide (H2O2) and hydrogen ion (H+) to produce chromate ion (CrO5) and water (H2O) can be written as:

2(Cr2O7)2- + 8H2O2 + 12H+ → 4CrO5 + 16H2O

In this reaction, the dichromate ion is reduced to chromate ion and hydrogen peroxide is oxidized to water. The reaction takes place in an acidic medium, which provides hydrogen ions to protonate the peroxide ion and facilitate the reduction of dichromate ion. The balanced equation shows that two molecules of dichromate ion, eight molecules of hydrogen peroxide, and twelve hydrogen ions are required to produce four molecules of chromate ion and sixteen molecules of water.

Overall, the balanced chemical equation represents the stoichiometry of the reaction and ensures that the number of atoms of each element on both sides of the equation is equal, which is necessary for the conservation of mass during a chemical reaction.

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Answer:

Explanation:

Answer:

-368.62 kJ/mol

Explanation:

[(2 x - 470.11 kJ/mol) ( 0kJ/mol)] - [ 2 x -285.8 kJ/mol) (2x 0 kj/mol)] = -368.62 kJ/mol

Answer:

Potential energy

Explanation:

Answer:

hhjcioz xlioyudiyyxyisrupautwtritu regards Roy

Answer:

1,43 M

Explanation:

molair mass NaCl = 58,44 g/mol

You need to calculate how many moles 25 g is:

25 g / 58,44 g/mol = 0,4278 mol

0,4278 mol / 0,3 L = 1,43 M

The answer was 25

Do according to bodmas rule

it is tecnically magnesium,

Answer:

barium is the answer

Answer:

B.

Explanation:

Minerals are formed due to chemical composition by rocks are pressured into their formed from dirt and naturally hard things.

The statement that represents a distinguishing difference between rocks and minerals is as follows:

Thus, the correct option for this question is B.

A mineral is a naturally occurring substance with distinctive chemical and physical properties, composition, and atomic structure. Rocks are generally made up of two or more minerals, mixed up through geological processes.

Minerals are definitely formed due to chemical composition by rocks being pressured into their formation from dirt and naturally hard things. A rock is an inorganic and a solid naturally-formed substance without any chemical composition or atomic structure.

A mineral is also a solid, inorganic, substance as that like a rock which has a definite crystalline structure as well as chemical composition. Rocks form, break down and move through the rock cycle.

Therefore, the correct option for this question is B.

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If u mean in terms of concentration, it will be 'Dilute'

One that is almost or entirely ionized in water is considered to be a strong acid or alkali. Nitric acid, sulfuric acid, and hydrochloric acid are a few examples. Weak solutions are not ionized in water.

Bases provide a similar problem: a strong base is one that is completely ionized in solution. A weak base is one that is less than 100% ionized in solution.

The fundamental elements that do not completely ionize in water are known as weak bases. Ammonia is one substance that is a weak base. A portion of NH3 that dissolves in water separates into ammonium cation.

An acid that partially separates into its ions in water or an aqueous solution is referred to as a weak acid. On the other hand, in water, a strong acid completely dissociates into its ions. While the conjugate acid of a weak base is also a weak acid, the conjugate base of a weak acid is also a weak solution.

Thus, Weak solutions are not ionized in water.

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The equilibrium concentration of OAc- in the 500 mL of 0.100 M solution of HOAc(aq) with a Ka(HOAc) of 1.79 x 10-5 will be approximately 0.00134 M..

To find the [OAc-] at equilibrium, we need to use the Ka expression and an ICE (Initial, Change, Equilibrium) table. The Ka expression for the dissociation of acetic acid (HOAc) is Ka = [H+][OAc-]/[HOAc]. Initially, [HOAc] = 0.100 M, [H+] = 0, and [OAc-] = 0. During the dissociation, [HOAc] will decrease by x, [H+] will increase by x, and [OAc-] will increase by x.

At equilibrium:
Ka = [H+][OAc-]/[HOAc]
1.79 x 10-5 = (x)(x)/(0.100-x)

We can assume that x is small compared to 0.100, so we can simplify the equation to:
1.79 x 10-5 = (x^2)/0.100

Now, solve for x:
x^2 = 1.79 x 10-5 * 0.100
x^2 = 1.79 x 10-6
x ≈ 0.00134

Since x represents the change in [H+] and [OAc-], the equilibrium concentration of OAc- is approximately 0.00134 M.

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Answer:

El volumen final del sistema es 1.2L

Explanation:

La ley de Charles establece que el incremento de la temperatura de un gas produce un incremento en el volumen directamente proporcional cuando la presión permanece constante. La ecuación es:

V₁/T₁ = V₂/T₂

Donde V es volumen y T temperatura absoluta de un gas en 1, el estado inicial y 2, su estado final.

Reemplazando:

V₁ = 1.3L

T₁ = 50°C + 273.15K = 323.15K

V₂ = Incógnita

T₂ = 300K

1.3L/323.15K = V₂/300K

1.2L = V₂

Answer:

MgO

Explanation:

Answer:

Most atoms do not have eight electrons in their valence electron shell. Some atoms have only a few electrons in their outer shell, while some atoms lack only one or two electrons to have an octet. In cases where an atom has three or fewer valence electrons, the atom may lose those valence electrons quite easily until what remains is a lower shell that contains an octet. Atoms that lose electrons acquire a positive charge as a result because they are left with fewer negatively charged electrons to balance the positive charges of the protons in the nucleus. Positively charged ions are called cations. Most metals become cations when they make ionic

Answer:

Nepal is a multilingual, multiethnic, multicultural and multi-religious nation. Unity in diversity is the defining characteristics of Nepali society. Mutual coexistence, tolerance and cooperation have guided the people in achieving social cohesion, peace and happiness.

Explanation:

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Answer:

Seafloor Ages

They found that the youngest rocks on the seafloor were at the mid-ocean ridges. The rocks get older with distance from the ridge crest.

hope this helped

Answer: things arnent always as they seem

Explanation:

The solubility of silver phosphate, Ag₃PO₄, in pure water is approximately 2.6 x 10⁻⁶ mol/L.

Solubility is the maximum amount of solute that can be dissolved in a given amount of solvent at a particular temperature and pressure, usually expressed in units of grams per liter (g/L) or moles per liter (mol/L).

The solubility of Ag₃PO₄ can be calculated using the Ksp expression;

[tex]K_{sp}[/tex] = [Ag⁺]³ [PO₄³⁻]

Let x be the solubility of Ag₃PO₄ in mol/L. Then, at equilibrium, the concentrations of Ag⁺ and PO₄³⁻ ions will be x mol/L. Therefore;

[tex]K_{sp}[/tex] = (x)³ (x)³ = x⁶

Solving for x, we get;

x = [tex](Ksp)^{(1/6)}[/tex] = (2.6 x 10⁻¹⁸[tex])^{1/6}[/tex]

≈ 2.6 x 10⁻⁶ mol/L

Therefore, the solubility is 2.6 x 10⁻⁶ mol/L.

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Answer:

500100 benswuer kers olá Marilene

The mass of H₂O is 44,680 g for the given reaction 2H₂ + O₂ → 2H₂O. Therefore, the correct option is option A.

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the force that is applied. The change caused by either an applied force is smaller the more mass a body has.

The kilogramme, which is defined approximately equal to 6.6 × 10⁻³⁴ joule second in terms of Planck's constant, is the unit of mass inside the Worldwide System of Units (SI). A joule is equivalent to one kilogramme multiplied by one square metre per second. The mass of H₂O is 44,680 g for the given reaction 2H₂ + O₂ → 2H₂O.

Therefore, the correct option is option A.

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Answer:

Rate = k [X]⁻¹ [Z]²

Explanation:

[X] [Y] [Z] initial rate M M M M · s −1

Exp 1 0.30 0.20 0.35      0.210

Exp 2 0.60 0.10 0.70      0.420

Exp 3 0.60 0.20 0.70     0.420

Exp 4 0.60 0.40 0.35      0.105

In Experiment 2 and 3 where the concentrations of Y and Z were constant, doubling the concentration of Y had no effect on the rate of the reaction. This means, that the rate of the reaction is zero order with respect to Y.

In experiment 3 and 4, dividing the concentration of Z by 2, causes the rate of the reaction to decrease by 4. This means the rate of the reaction is second order with respect to Z.

In experiment 1 and 4, doubling the concentration of X, causes the rate of the reaction to decrease by half. This means that X has an order of -1 with respect to the rate of the reaction.

The rate expression is given as;

Rate = k [X]⁻¹[Y]⁰[Z]²

Rate = k [X]⁻¹ [Z]²

Answer:

The measurement between to points is known as the distance

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Boiling point = Normal boiling point + ΔT = 373 K + (3.71 g/180.16 g/mol) * (0.512 K/m) / (0.087 kg) = 374.12 K.

To calculate the boiling point of the solution, we'll first find the molality (m) of fructose.

Molality is defined as moles of solute per kilogram of solvent.

1. Calculate moles of fructose: (3.71 g) / (180.16 g/mol) = 0.0206 mol
2. Convert grams of water to kilograms: 87 g = 0.087 kg
3. Calculate molality: (0.0206 mol) / (0.087 kg) = 0.237 m

Next, we'll use the molality and the Kbp (0.512 K/m) to find the change in boiling point (ΔT).

4. Calculate ΔT: (0.237 m) * (0.512 K/m) = 0.121 K

Finally, add ΔT to the normal boiling point (373 K).

5. Boiling point = 373 K + 0.121 K = 374.12 K

The boiling point of the solution is 374.12 K, or approximately 101.0°C.

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The boiling point of the solution would be 100.34°C.

To calculate the boiling point elevation, we can use the formula:

ΔTb = Kbp x molality

where ΔTb is the boiling point elevation, Kbp is the boiling point elevation constant of the solvent, and molality is the concentration of the solution in terms of moles of solute per kilogram of solvent.

First, we need to calculate the molality of the solution. We know the mass of fructose (3.71 g) and the mass of water (87 g). We can convert the mass of fructose to moles by dividing by its molar mass:

moles of fructose = 3.71 g / 180.16 g/mol = 0.0206 mol

Then, we can calculate the molality:

molality = moles of fructose / mass of water in kg

molality = 0.0206 mol / 0.087 kg = 0.237 mol/kg

Now we can calculate the boiling point elevation:

ΔTb = Kbp x molality

ΔTb = 0.512 K/m x 0.237 mol/kg = 0.1216 K

Finally, we can calculate the boiling point of the solution:

Boiling point of solution = normal boiling point of solvent + ΔTb

Boiling point of solution = 373 K + 0.1216 K = 373.12 K

We can convert the boiling point to Celsius by subtracting 273.15:

Boiling point of solution = 373.12 K - 273.15 = 100.34°C

Therefore, the boiling point of the solution is 100.34°C.

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Answer:

1 / 2 of her money would be left

Explanation:

Tammy spent 2/5 of her savings on a watch. She then spent 1/6 of the remainder on a bag. What fraction of her money did she have left?

Taking the question bits by bit;

Tammy spent 2/5 of her savings on a watch

Amount Spent = 2/5

Remainder = 1 - 2/5 = 3/5

She then spent 1/6 of the remainder on a bag

Amount Spent = 1/6  *  3/5 = 1/2  *  1/5  = 1 /10

Total amount spent = 2/5 + 1 /10 =   (4 + 1 ) / 10 = 5 / 10 = 1 / 2

Amount left = 1 - 1 /2 = 1 / 2