What is the pH of a substance that has a hydrogen ion concentration of 1.2 x 10^-2 M

Answer:

great job!!

Explanation:

ALL IS CORRECT :)

The speed or velocity of the car after it has traveled 200 meters is 44.3 m/s.

The velocity or speed of the car is determined using the equation of motion in a straight line given below as follows:

v² = u² + 2as

where;

Solving for the speed or velocity of the car, v;

v = √ (u² + 2as)

v = √ (0² + 2 * 4.9 * 200)

v  = √ 3920

v = 44.3 m/s

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Complete question:

A race car starting from rest accelerates uniformly at a rate of meters per second. What is the car's speed after it has traveled 200 meters?

A. 1960 m/s

B. 62.6 m/s

C. 44.3 m/s

D. 31.3 m/s

Mass of sodium :- 23 grams

Mass of Chlorine :- 35.5 grams

Mass of NaCl :- 58.5 grams

mass given :- 25 grams

moles :- 0.432 ( given mass/ ionic mass)

\(molarity = \frac{moles}{vol} \\ molarity = \frac{0.432}{2} \\ molarity = 0.216 \: mole{l}^{ - 1} or \: molar\)

Answer:

it has  a huge surface-to-volume ratio, very high porosity and completely different physiochemical properties.

Explanation:

idk if the answer is good  !

sorry

Answer:

1. Atomically Delicious Brownies

2. Periodic Table Treats

3. Sweet Chemical Reactions

4. The Mole's Munchies

5. Chemistry Compound Brownies

6. Bunsen Burner Bars

7. Elemental Delights

8. Molecule Muffins

9. Science of Sweets

10. The Chemist's Chocolate

Thanks me later

Answer:

Ionization energy is the energy required to remove an electron from a specific atom. It is measured in kJ/mol, which is an energy unit, much like calories. The ionization energies associated with some elements are described in the Table 1. For any given atom, the outermost valence electrons will have lower ionization energies than the inner-shell kernel electrons. As more electrons are added to a nucleus, the outer electrons become shielded from the nucleus by the inner shell electrons. This is called electron shielding .

Explanation:

a little summary

Ionization energy refers to the amount of energy needed to remove an electron from an atom.

Ionization energy decreases as we go down a group.

Ionization energy increases from left to right across the periodic table.

Answer:

Calcination refers to heating a solid to high temperatures in absence of air or oxygen, generally for the purpose of removing impurities or volatile substances.

Explanation:

hope it helps

The molar mass of a 0.314-gram sample of gas having a volume of 1.6L at 287K and 0.92 atm is 0.503g/mol.

The temperature and pressure of a gas that behaves like an ideal gas is directly proportional to one another.

First, calculating molar mass :

The molar mass of a substance can be calculated by dividing the mass of the substance by its number of moles.

However, the number of moles can be calculated using the formula:

PV = nRT

From where;

P = pressure

V = volume

R = gas law constant

T = temperature

n = number of moles

0.92 × 1.6 = n × 0.0821 × 287

1.47 = 23.56n

n = 1.47/23.56

n = 0.624 moles

Molar mass = 0.314 g ÷ 0.624 mol

Molar mass = 0.503 g/mol

Therefore, the molar mass of a 0.314-gram sample of gas having a volume of 1.6L at 287K and 0.92 atm is 0.503g/mol.

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Answer:

they got protons, electrons, and neutrons

Explanation:

Answer:

Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

Explanation:

Answer:

Chemical change.

Explanation:

Physical Change                                                                                              

The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.  

Example :

Water converting to Ice

Water converting to gas

In this water molecule remain the same only they rearrange themselves that change its state of mater not composition

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions  

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

The reaction of between sodium and chlorine:

2Na(s) + Cl₂(g) -------------------------------------> 2NaCl(s)

Answer:

ano po anggaba naman point

Answer:

the advices are,

1. i would say him or her to give all information about not to do domestic violence who has doing it.

2. i would say him/ herto be strict towards the domestic violence.

3. i would suggest him or her to raise voice aganist towards the domestic violence.

5. i would suggest him or her to negotiate to them for theirbasic rights.

6. if its not possible then i would suggest him or her to complain to the police.

hope u like it ...

Answer:  If my friend has been suffering from domestic violence, then I will advice her to be strict towards domestic violence, believe in yourself, don't lose hope, provide the information about not doing domestic violence for who has doing it, I will suggest her to raise voice against it, to fight for the basic rights, If not possible then i would advice her to complain to police and if it is even worst then I will advice her to leave as soon as possible, make your own decision, etc These advice i would give if my friend has been suffering from domestic violence.

Explanation:

Hope it will help you...................

Answer:

\(\huge\boxed{\sf Q = 5880\ Joules}\)

Explanation:

Given:

m = mass = 40 g = 0.04 kg

c = specific heat constant of water = 4200 J/Kg°C

ΔT = change in temperature = T2-T1 = 60 °C - 25 °C = 35°C

Required:

Q = change in heat energy = ?

Formula:

Q = mcΔT

Solution:

Q = (0.04)(4200)(35)

Q = 5880 Joules

\(\rule[225]{225}{2}\)

The no. of moles of kr in the sample will be 56.89 mol found out by using ideal gas equation and Avagadro's Law.

Ideal Gas Equation:

PV=nRT

Where,P is the pressure of the gas

           Volume of the gas

           n is the no. of moles

           R is the universal gas constant {R = 8.3144598 J.mol-1.K-1}

           T is the temperature

Avagadro's Law:

V1/n1=V2/n2 ------(1)

Given,

V1=393 mL

    =3393  mL*1L/1000 mL=0.393 L

n1=3.95 mol

V2=5.66 L

n2=?(to find)

putting the values in (1);

0.393 L/3.95 mol = 5.66 L/n2

n2=56.8880 mol

n2=56.89 mol

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Answer:

Carbon disulfide, CS2 , will have a total of 16 valence electrons, 4 from the carbon atom and 6 from each of the two sulfur atoms.

Explanation:

Your Welcome!

Answered By : TrinTrinPrinted!

The total electron pairs in the structure of Carbon disulfide (CS₂) is 8 electron pairs.

Electron pair is, two electrons occupying the same orbital in an atom or molecule.

CS₂ is Carbon disulfide, it will have a total of 16 valence electrons, 4 from the carbon atom and 6 from each of the two sulfur atoms.

The 16 valence electrons will form 8 electron pairs.

Thus, the total electron pairs in the structure of Carbon disulfide (CS₂) is 8 electron pairs.

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49) The weakest acid among the given options is HClO (chlorous acid) with a Ka value of 3.0 × 10⁻⁸.

50- The given statement about the solubility is true.

49- The Ka value represents the acid dissociation constant, which indicates the extent to which an acid dissociates in water. A smaller Ka value corresponds to a weaker acid.

Comparing the given acids:

A) HF (hydrofluoric acid) has a Ka value of 6.8 × 10⁻⁴.

B) HClO (chlorous acid) has a Ka value of 3.0 × 10⁻⁸.

C) HNO₂ (nitrous acid) has a Ka value of 4.5 × 10⁻⁴.

D) HCN (hydrocyanic acid) has a Ka value of 4.9 × 10⁻¹⁰.

E) Acetic acid has a Ka value of approximately 1.8 × 10⁻⁵.

Among these options, HClO has the smallest Ka value, indicating the weakest acid. The lower Ka value suggests that it dissociates to a lesser extent in water compared to the other acids.

50) The statement is true. The solubility of slightly soluble salts containing basic anions is indeed proportional to the pH of the solution. Basic anions can act as weak bases and react with hydronium ions (H₃O⁺) in an acidic solution, leading to the formation of the corresponding acid and reducing the concentration of the anion.

When the pH of the solution increases (becomes more basic), the concentration of hydronium ions decreases. This reduces the likelihood of the basic anion reacting with hydronium ions, resulting in a higher solubility of the salt. Conversely, in an acidic solution with a higher concentration of hydronium ions, the solubility of the salt decreases.

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Explanation:

T = 409.5 K, P = 1.50 atm: V = 22.4 L The ideal gas law is: PV = nRT where. P = pressure. V = volume n = number of moles.

Answer: Wheat flour, edible oil, egg white, lettuce preservative, meat or poultry marinade, vegetable antibacterial wash.

Explanation:

hydrogen peroxide is used as a bleaching agent in some food

I hope this helped

Acetone will be deprotonated completely by potassium tert-butoxide because potassium tert-butoxide is a strong base (non-nucleophilic and bulky).

Acetone (propanone) can be completely deprotonated by potassium tert-butoxide (KOtBu) under suitable conditions. The reaction mechanism involves the attack of the tert-butoxide anion on the acidic proton of acetone, forming an enolate intermediate that can further react with other electrophiles or undergo protonation. The use of a strong base like KOtBu favors the complete deprotonation of acetone and the formation of the corresponding enolate. However, the extent of deprotonation and the stability of the enolate may depend on factors such as temperature, solvent, and concentration of the reagents.

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Answer:

Malachite

Explanation:

Malachite is the only listed compound that must contain copper and oxygen.

Copper and oxygen are both elements found on the periodic table. They have the following symbols;

         Copper  = Cu

         Oxygen  = O

From the given choices, only option 1 has the symbol Cu and O.

So only malachite contains both copper and oxygen.

This is not the best way to organize a periodic table because two elements might have similar atomic mass.

Periodic table is a chart in which arrangement of chemical elements are done.

In the early periodic table elements are arranged on the basis of their atomic masses, while after sometime Moseley arranged the periodic table on the basis of atomic number as he proposed that properties of an element is justified on the basis of number if electrons.

And mass of two substances may be same so it is difficult to differentiate between them.

Hence, two elements might have similar atomic mass.

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Answer: Newton's Third Law of Motion.

Explanation:

Newton's Third Law of Motion simply states that every action force creates a reaction force and then, this reaction force will be equal in strength and opposite in direction.

The statement simply implies that in every interaction, there will be a pair of forces that is acting on the two interacting objects. An example of Newton's third law of motion can be seen when a person jumps, thenlegs of the person will apply a force to the ground which will then propel the person into the air.

I found this. hope it helps!

Human activity can have a significant impact on the balance of acids and bases in the environment are Acid rain, Ocean acidification, and Agricultural practices.

Acid rain is caused by the release of sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere from the burning of fossil fuels. These gases react with water vapor in the atmosphere to form acids, which can then fall to the earth as rain, snow, or fog. Acid rain can have a detrimental effect on the environment, including the acidification of lakes and streams, the damaging of forests and crops, and the erosion of buildings and monuments.

The burning of fossil fuels also releases carbon dioxide (CO2) into the atmosphere, which can be absorbed by the oceans. This can lead to a decrease in the pH of the oceans, which can have a negative impact on marine life, including the bleaching of coral reefs and the dissolution of the shells of shellfish.

The use of fertilizers in agriculture can lead to the release of nitrous oxide (N2O) into the atmosphere, which can contribute to the formation of acid rain. Additionally, the use of pesticides and herbicides can lead to the release of chemicals into the environment, which can also affect the balance of acids and bases.

Overall, human activity can have a significant impact on the balance of acids and bases in the environment, and it is important to take steps to reduce our impact on the environment in order to maintain a healthy balance of acids and bases.

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The solutions arranged in order from lowest to highest freezing point are: Pure water (-0.000000 °C), Water with 1/2 teaspoon of dissolved sugar (-0.000136 °C), Water with 1 teaspoon of dissolved sugar (-0.000272 °C), and Water with 2 teaspoons of dissolved sugar (-0.000543 °C).

The freezing point of a solution depends on its concentration, with more concentrated solutions having lower freezing points. Therefore, to arrange the solutions in order from lowest to highest freezing point, we need to consider their concentrations. Assuming that the teaspoon of sugar has a mass of 5 grams, we can calculate the concentrations of the solutions as follows:

Water with 1 teaspoon of dissolved sugar:

Mass of sugar = 5 g

Mass of water = 100 g (since 1 ml of water has a mass of 1 g)

Concentration of sugar = 5 g/100 g = 0.05 g/g

Freezing point depression constant for water = 1.86 °C/m

Freezing point depression = Kf × molality of solution

Molality of solution = concentration of solute / molar mass of solute

Molar mass of sugar (C₁₂H₂₂O₁₁) = 342.3 g/mol

Molality of solution = 0.05 g/g / 342.3 g/mol = 0.000146 mol/kg

Freezing point depression = 1.86 °C/m × 0.000146 mol/kg = 0.000272 °C

Freezing point of solution = 0 °C - 0.000272 °C = -0.000272 °C

Water with 1/2 teaspoon of dissolved sugar:

Mass of sugar = 2.5 g

Mass of water = 100 g

Concentration of sugar = 2.5 g/100 g = 0.025 g/g

Molality of solution = 0.025 g/g / 342.3 g/mol = 0.000073 mol/kg

Freezing point depression = 1.86 °C/m × 0.000073 mol/kg = 0.000136 °C

Freezing point of solution = 0 °C - 0.000136 °C = -0.000136 °C

Pure water: Freezing point of pure water = 0 °C

Water with 2 teaspoons of dissolved sugar:

Mass of sugar = 10 g

Mass of water = 100 g

Concentration of sugar = 10 g/100 g = 0.1 g/g

Molality of solution = 0.1 g/g / 342.3 g/mol = 0.000292 mol/kg

Freezing point depression = 1.86 °C/m × 0.000292 mol/kg = 0.000543 °C

Freezing point of solution = 0 °C - 0.000543 °C = -0.000543 °C

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--The given question is incorrect, the correct question is

"Arrange the solutions in order from lowest to highest freezing point. assume that each solution has a volume of 100 ml. A) Water with 1r teaspoon of dissolved sugar B) Pure water C) Water with 1/2  teaspoon of dissolved sugar D) Water with 2 teaspoon of dissolved sugar."--

The potential of a standard hydrogen electrode (SHE) can be calculated using the Nernst equation, that is : E(SHE) = E°(SHE) + (0.0592/n) * log([H₂]/[H⁺]).

Here, [H₂] is the concentration of hydrogen gas, [H⁺] is the concentration of hydrogen ions, E°(SHE) is the standard electrode potential of the SHE (which is 0 V), and n is the number of electrons transferred in the reaction.

Given [H₂] = 2.2 atm and [H⁺] = 0.84 M, and assuming n = 2, we can substitute these values into the Nernst equation to calculate E(SHE).

Hence,  potential of a standard hydrogen electrode (SHE) can be calculated using the Nernst equation as : E(SHE) = E°(SHE) + (0.0592/n) * log([H₂]/[H⁺]).

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