in an aqueous solution containing 0.05 m concentrations of the following metal ions, which metal hydroxide compound will precipitate out first as naoh is slowly added to the solution?

The pH of the solution is 1.38.

Mass of HCl = 614 mg = 0.614 g

Moles of HCl = 0.614g / 36.5 gmol⁻¹

Concentration of HCl :

Concentration=  moles/volume of solution in liters

On adding 0.01682 moles to 400 mL of water that 0.4 L of water.

[HCl]=0.01682 mol/0.4 L= 0.04205 M

HCl (s) + H₂O (l) → H₃O⁺ (aq) +Cl⁻

1 mole of HCl gives 1 mole of hydronium ion and 1 mole of chloride ions in an aqueous solution.

Then 0.04205 mol/L of HCl will give:

1x0.04205 M= 0.04205 mol/L of hydronium ions.

[H₃O⁺]= 0.04205 M

pH= -log[H₃O⁺]

pH= -log[0.04205 M]

    = 1.38

The pH of the solution is 1.38.

The complete question is- A chemist dissolves 614. mg of pure hydrochloric acid in enough water to make up 400 mL of solution. Calculate the pH of the solution. Round your answer to 3 significant decimal places. X 5 ?

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According to the question the pH of the solution is 10.17.

pH is a measure of the acidity or alkalinity of a solution. It is measured on a scale of 0 to 14, with 7 being neutral. Solutions with a pH below 7 are considered acidic and solutions with a pH above 7 are considered basic or alkaline. pH is important to biological processes and environmental chemistry because it affects the availability of certain nutrients, the activity of enzymes, and the growth and activity of microorganisms.

The pH of a solution prepared by mixing 50.00 mL of 0.10 M methylamine, CH 3NH 2, with 20.00 mL of 0.10 M methylammonium chloride, CH 3NH 3Cl, can be calculated using the Henderson-Hasselbalch equation:
pH = pKa + log [(Conjugate Acid)/(Base)]
where pKa is the acid dissociation constant of the base and the conjugate acid is the salt of the base.
In this case, Kb = 3.70 x 10⁻⁴ for methylamine and the conjugate acid of CH₃NH₃Cl is CH₃NH₂.
Therefore, the pH of the solution is:
pH = -log[3.70 x 10⁻⁴] + log[(0.10 M CH₃NH₂)/(0.10 M CH₃NH₃Cl)]

= 10.17

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Answer:

a= 0.2m/s²

Explanation:

Fnet = ma

20 = 100a (divide both sides by 100)

a = 0.2m/s²

A wooden plank has a mass of 100 kg force of 20 Nwllhave the acceleration of 0.2 m/s².

Acceleration is the rate of change of the velocity of an object with respect to time.

Accelerations are vector quantities.

The orientation of an object's acceleration is given by the orientation of the net force acting on that object.

We know,

F= ma ,

where

For 100kg ,

20 = 100 x A

A = 20/100

A = 0.2 m/s².

Therefore, A wooden plank has a mass of 100 kg force of 20 Nwllhave the acceleration of 0.2 m/s².

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Answer:

yea I'm also looking for this question to .

According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus is specific allowed orbits.

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The percentage, by mass, of fluorine in sulfur hexafluoride (SF6), a potent greenhouse gas is 13.008%.

The percentage by mass of an element in a compound can be calculated by dividing the atomic mass of the element by the compound, multiplied by 100.

According to this question, the percentage by mass of fluorine (F) in sulfur hexafluoride (SF6) is to be calculated as follows:

% mass of F = 19/146.06 × 100

% mass of F = 13.008%

Therefore, the percentage, by mass, of fluorine in sulfur hexafluoride (SF6), a potent greenhouse gas is 13.008%.

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ANSWER

EXPLANATION

Given that

The number of moles lithium bromide is 5.5 moles

Firstly, write a balanced equation for the reaction

Find the number of moles of bromine using stoichiometry ratio

Let x represents the number of bromine

The final temperature of the mixed water is 44.66 ⁰C.

The given parameters;

mass of the cold water, m = 100 g

initial temperature of the water, t₁ = 24.9 ⁰C

initial  temperature of the hot water, t₂ = 71.0⁰ C

mass of the hot water = 75 g

specific heat capacity of water is 4.184 J/g⁰C

The final temperature of the mixture is calculated as follows;

Based on the principle of conservation of energy;

Heat lost by hot water = heat gained by the cold water

mcΔθ₂ = mcΔθ₁

75 x 4.184 x (71.0 - T) = 100 x 4.184 x (T - 24.9)

75 x (71.0 - T) = 100 x (T - 24.9)

(71.0 - T) = 1.333(T - 24.9)

71.0 - T = 1.333T - 33.1917

71.0 + 33.1917 = 1.333T + T

104.1917 = 2.333T

Thus, the final temperature of the mixed water is 44.66 ⁰C.

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Answer:

A noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons. So for sodium, we make the substitution of [Ne] for the 1s22s22p6 part of the configuration. Sodium's noble gas configuration becomes [Ne]3s1. That is the answer.

Explanation:

Brainliest Please.

Beryllium- nuclide, with the atomic number of 4 and the mass number of 9, undergoes beta decay, which involves the emission of a beta particle. The beta particle is an electron that is emitted from the nucleus of the atom when a neutron is transformed into a proton. As a result, the atomic number increases by 1, while the mass number remains unchanged.

The balanced nuclear chemical equation that describes the beta decay of beryllium- nuclide can be written as follows:
4/9 Be → 5/9 B + β-

In this equation, the reactant is beryllium- nuclide, which decays into a product of boron- nuclide and a beta particle. The atomic number of beryllium increases from 4 to 5, while the mass number remains unchanged at 9. The beta particle emitted has a charge of -1 and a mass of 0, which indicates that it is an electron.

In conclusion, the beta decay of beryllium-nuclide is a radioactive process that involves the emission of a beta particle. The balanced nuclear chemical equation represents the transformation of the reactant into a product, including the emission of the beta particle.

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a. Mole to mole ratios relate the number of moles of any substance in a balanced chemical reaction. They are based on the balanced chemical equation.

Answer

The freezing point o the solution = 273.714153 K

The boiling point of the solution= 373.1955328 K

Explanation

Given:

Mass of glucose = 5.00 g

Volume of water = 72.8 g

What to find:

The freezing point and the boiling point of the solution.

Step-by-step solution:

Note: (Freezing point of water = 273K, Kf for water =1.87K kg/mol, atomic weight C = 12, H = 1, O = 16).

The freezing point of the solution:

The molecular weight of glucose C6H12O6 = 6(12) + 12(1) + 6(16) = 180 g/mol

The number of moles of glucose = (Mass of glucose/Molecular weight) = 5.00 g/180.0 g/mol = 0.0278 moles

Mass of water = 72.8 g = 0.0728 kg

So molality of glucose = (Moles o glcsose/Volume of solution) = 0.0278 mol/0.0728 kg = 0.3819 mol/kg

The depression in the freezing point, ∆T = Kf x molality = 1.87 K kg/mol x 0.3819 mol/kg = 0.714153 K

Since the freezing point of water = 273 K

Therefore, the freezing point of the solution= 273 K + 0.714153 K = 273.714153K

The boiling point of the solution:

∆T = i x m x Kb

∆T = change in temperature i.e boiling point elevation

i = van't Hoff factor = 1 for glucose since it does not ionize or dissociate. It is a single particle.

m = molality = moles solut/kg solvent = 0.0278 mol/0.0728 kg = 0.3819 mol/kg

Kb = boiling poin constant = 0.512 K kg/mol

∆T = 1 x 0.3819 mol/kg x 0.512 K kg/mol

∆T = 0.1955328 K

Since the freezing point of water = 373 K

Therefore, the boiling point of the solution = 373 K + 0.1955328 K = 373.1955328 K

Answer:

1. Honey → Hybridization

2. Green manure → Ayurvedic medicine

3. Duck → Poultry

4. Cereal → Wheat

5. High-yielding varieties → Nitrogen and phosphorus

Hope this helps :)

Pls brainliest...

The term "OH-" refers to hydroxide ions, which have a negative charge and are able to interact with positively charged species. In the context of redox reactions, hydroxide ions can stabilize intermediate oxidation states by serving as electron donors or acceptors.

This is because hydroxide ions are highly reactive and can easily form chemical bonds with other molecules. By doing so, they can help to balance the transfer of electrons between different species and ensure that oxidation states remain stable throughout the reaction.

The hydroxide ion (OH-) can act as both a reducing agent as well as an oxidizing agent. This dual behavior allows it to participate in redox reactions, facilitating the conversion of elements between different oxidation states and providing stability to intermediate oxidation states.

Overall, the ability of hydroxide ions to stabilize intermediate oxidation states is due to their unique chemical properties and their ability to participate in redox reactions.

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When the seafloor spreads Basalt cools to form a new crust near the mid ocean rift.

Seafloor spreads means the separation of seafloor. Tectonic plate and the large plate of the lithosphere will split apart from the each other. This process occurs at the mid ocean ridges and . seafloor spreading leads to  dangerous things like rising sea level and earthquake . the cause for the seafloor spreading is ocean floors ruggedness. hot magma cooled to form igneous rock. this Basalt (the rock ) cools to form a new crust near the mid ocean rift.

Thus, When the seafloor spreads Basalt cools to form a new crust near the mid ocean rift.

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Answer: B

Explanation:

At equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction, and thus the concentrations of the reactants and products must be constant.

Once you have the correct values for pressure, volume, and temperature, follow these following steps to calculate the mass and number of moles of dinitrogen monoxide gas collected.

To calculate the mass and number of moles of dinitrogen monoxide gas collected, we will use the ideal gas law equation:
PV = nRT
where:
P = pressure in the flask
V = measured volume of the flask
n = number of moles of gas
R = ideal gas constant (0.0821 L atm / K mol)
T =temperature in Kelvin
However, the student question did not provide values for the pressure, volume, or temperature. Assuming that you have these values, you can proceed as follows:
1. Convert the given temperature to Kelvin if it's in Celsius (K = °C + 273.15).
2. Plug in the given values for P, V, and T into the ideal gas law equation
3. Solve for n (number of moles):
n = PV / RT
4. Calculate the mass of dinitrogen monoxide (N₂O) gas using the molar mass (44.013 g/mol):
mass = n × molar mass
5. Round your answers to the appropriate significant digits.

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Answer: 4.5

Explanation: Got it right on the exam. Hope this helps!

Answer:

The density of the liquid is 3 g/mL.

Explanation:

Equation of density:

D = m/v

Plug in the known information:

D = 45 g / 15 mL

Solve:

D = 45 g / 15 mL

D = 3 g/mL

Answer:

After the Peloponnesian War, a period of political and economic unrest ensued in the Greek city-states as disagreements about the post-war settlement divided the cities. The war itself had caused considerable damage to infrastructure and disrupted trade networks, which had a further destabilizing effect on the region. The post-war chaos did eventually lead to the rise of Macedonian power in the fourth century BCE, however, resulting in the unification of the Greek city-states under the rule of Phillip II of Macedon.

Answer:

it is damp moist and other things

Explanation:

A formula for the sensitivity dR/dM  represents the sensitivity of the body's reaction to the medication. It shows how the reaction changes with respect to the dose of the medication, M. The term M*C represents the contribution of the constant C to the sensitivity, while the term \((2M^2)/3\) represents the contribution of the dose M itself.

To find a formula for the sensitivity, dR/dM, let's differentiate the given function R(M) with respect to M.

Step 1: Start with the function \(R(M) = M^2(C/2 - M/3).\)

Step 2: Apply the power rule of differentiation to differentiate M^2. The power rule states that if

\(f(x) = x^n, then f'(x) = n*x^(n-1). \\\)

n this case, n = 2.

\(dR/dM = 2M^(2-1)*(C/2 - M/3).\)

Simplifying, we have:

\(dR/dM = 2M*(C/2 - M/3).\)

Step 3: Distribute the 2M to each term inside the parentheses:

\(dR/dM = M*C - (2M^2)/3.\)

This formula represents the sensitivity of the body's reaction to the medication, dR/dM. It shows how the reaction changes with respect to the dose of the medication, M. The term M*C represents the contribution of the constant C to the sensitivity, while the term \((2M^2)/3\) represents the contribution of the dose M itself.

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the formula for the sensitivity, or the rate of change of the reaction R with respect to the dose M, is

dR/dM = MC - M\(^2^/^3\)

We calculate the derivative of the reaction function R(M) with respect to M.

the reaction function: R(M) = M²(C/2 - M/3)

We will apply  the power rule and the constant multiple rule of differentiation,

dR/dM = d/dM [M²(C/2 - M/3)]

= 2M(C/2 - M/3) + M²(0 - (-1/3))

= 2M(C/2 - M/3) + M\(^2^/^3\)

dR/dM =\(MC - 2M^2^/^3 + M^2^/^3\)

= \(MC - M^2^/^3\)

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Answer:

I think it would be the last one

The ice cubes make the water colder by releasing coolness into the water

Explanation:

I apologize if that is wrong

The study of a chemical is called chemistry.

The correct answer is C.

According to the law of thermodynamics, it states that heat transfers from high temperature to low temperature.

In the question, when you add ice to the water the temperature of the water is more than the ice and it start transferring it to the ice and starts melting and making the whole system equal temperature.

Hence, the correct answer is C that is Heat energy moves from the water to the ice cubes.

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Newton's law of motion states the relationship between the force acting on the body in motion. The relation between force, mass, and acceleration is given by Newton's second law.

Newton's second law states the relationship between mass, force, and acceleration. It relates the force with the change of the motion of an object with a mass.

Newton's second law is given as,

\(\rm F = ma\)

Where F is force, m is the mass of the object and a is the acceleration.

Newton's first law is about inertia, the third law is about the law of action and reaction, and the fourth law is about the law of gravitation.

Therefore, option B. Newton's second law states the relationship between force, mass, and acceleration.

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However, assuming that CH3 is a part of a larger molecule, we can predict its shape, bond angle, and hybridization based on the bonding theory.

Since CH3 has three groups of valence electrons surrounding the central carbon atom, we can predict its shape to be trigonal planar. The bond angle between each of the three hydrogen atoms and the central carbon atom is predicted to be 120°. To determine the hybridization of the carbon atom, we can count the total number of electron groups (3 bonding groups + 0 lone pairs = 3 electron groups).

Based on this, we can predict the hybridization of the carbon atom to be sp2, where the s orbital and two of the p orbitals of the carbon atom hybridize to form three equivalent sp2 orbitals that are oriented in a trigonal planar arrangement. Therefore, the answer would be option A) trigonal planar, 120°, sp2.

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Answer:

potassium (K) has (220 pm) while Sodium (Na) has (180 pm). The potassium atom has an extra electron shell compared to the sodium atom thus the potassium has a larger atomic radius.

Answer:

Ken is planting vegetables in his garden. He has 20 seeds. Determine whether 20 is prime or composite number. If it is composite, list all of the ways Ken can arrange the seeds in even rows.

Answer:

A. A gas has a volume that can change.

When water boils do the H2O molecules break or do they stay together just in a gas form?

The H2O molecules themselves do not "change into a gas state" when water boils. Water molecules remain water molecules regardless of circumstance.

The unseen molecular ties that hold the molecules together do alter.

It’s these bonds that dictate whether water is ice, liquid, or steam.

So what we’re interested in is what happens to the bonds when water boils.

In this case, chemical bonding play a role. Two different types of chemical bonds exist:

Between molecules, the first kind exists. They are known as intermolecular bonds, because they keep molecules like H2O connected to one another.

Between molecules, a wide variety of forces are at work. In the image below, a unique type of bond known as James—er, I mean Hydrogen—holds water molecules together. Hybrid Bond. The Nitrogen, Oxygen, or Fluorine atom in one molecule interacts with the Hydrogen atom in another molecule to form a hydrogen bond, which effectively draws the two molecules together.

Of course, it also dons a tux. Its most distinctive quality is that.

Between individual atoms is where the second type of chemical connection may be found.

They are known as intramolecular bonds, and they keep atoms together, such as the hydrogen and oxygen in H2O.

Unfortunately, I can't give an example of an intramolecular connection because they don't dress in tuxedos or resemble Daniel Craig. That is how reserved intramolecular bonds are.

Which is that? Do you still desire a photo? OK, I see. Fine.

The bonds between the molecules and atoms that make up some hydrogen chloride (HCl), often known as hydrochloric acid, are shown in the following image: (Attachment #2)

Let's return to the water now. What transpires when it is boiled?

Well, when water is heated to a boiling point, it changes into steam, which is really water in a gaseous state. It sort of vanishes from vision as it floats up into the air.

Which of the two molecular bonds will break now—the intramolecular ones or the intermolecular ones?

If the intramolecular bonds disintegrated:

The bonds between the H and O atoms break down; there is no longer anything holding the atoms of H2O together.

The atoms are now happier to let the molecule to disintegrate into two hydrogen atoms and one oxygen atom, giving us... not water, but Dobby with a rotten sock.

You see, water is made up of two hydrogen atoms chemically bound to an oxygen atom. We would not have water if the chemical link hadn't existed. It can't be the intramolecular bonds that break since we know that boiling water produces steam, which is still water.

On a side note, intramolecular bonds are REALLY strong. 100 degrees celsius, the boiling point of water (212 degrees Fahrenheit for you Americans), is not nearly enough energy to break them apart.

However, if the INTERmolecular bonds disintegrated:

The H2O molecules' bonds are broken.

The molecules are now far apart from one another since Daniel Craig is no longer holding them at gunpoint together. The molecules are now less dense than liquid water and even air itself because of their increased distance from one another.

The molecules can now float into the air as a result. We regrettably lack James Bond's virtue of being Hydrogen Bond, so we perceive this as steam rising from a boiling pot of water.

Alas.