explain, using le châtelier’s principle, what happens to the [h ] of a 0.10m solution of acetic acid when a drop of naoh solution is added.

Answer:

They then put a balloon on top of the bottle immediately after adding them together. The student observed that the balloon inflated and got larger.

Explanation:

Btw brainliest me plss

Answer:

The student's prediction is wrong.  Mass cannot be spontaneously created.

Explanation:

Sorry, but all the other answers are wrong. They didn't even come close to answering your question. This question concerns ourselves with the law of mass conservation. This states that, in a reaction, the total mass of the reactants must equal the total mass of products formed after the reaction. For instance, if the mass of the reactants both weighed 5 grams, then the products, if you measured their weight afterwards, would be 5 grams. The reaction does not generate new mass at the end of the reaction, this cannot be done for any reaction, let alone this one. Thank you!

a) Para redondear correctamente la división 150.00 / 8.65, debemos seguir las reglas de redondeo. En este caso, nos fijaremos en el segundo decimal después del punto. Si el tercer decimal es igual o mayor a 5, se redondea hacia arriba; de lo contrario, se redondea hacia abajo. En este caso, el tercer decimal es 0, por lo que redondeamos hacia abajo. Entonces, el resultado redondeado sería 17.34.

b) En la suma 34.045 + 205, debemos redondear correctamente el resultado. Como no se especifica la cantidad de decimales requeridos, asumiremos que se debe redondear al segundo decimal. La regla establece que si el tercer decimal es mayor o igual a 5, se redondea hacia arriba; de lo contrario, se redondea hacia abajo. En este caso, el tercer decimal es 5, por lo que redondeamos hacia arriba. Entonces, el resultado redondeado sería 239.05.

En resumen, la división 150.00 / 8.65 redondeada correctamente es 17.34, y la suma 34.045 + 205 redondeada correctamente es 239.05.

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20,000 is the correct answer

What is empirical formula ?

The empirical formula of a chemical compound is the simplest ratio of the number of atoms of each element present in a compound. It represents the smallest whole number ratio of the elements in a compound and gives an indication of the relative proportions of the elements. The empirical formula is not necessarily the same as the molecular formula, which represents the actual number of atoms in a molecule. The molecular formula may be a multiple of the empirical formula and can be determined by analyzing the compound's molecular weight.

Multiply each by 20,000, then we have

C: 2.48925 x 20,000 = 49,785

H: 3.9901 x 20,000 = 79,802

O: 1.000 x 20,000 = 20,000

Multiply each element by in order to have them all reach the smallest whole number will be 20,000.

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Answer: The answer is 2

Explanation:

Answer:

The answer is D..i.e phosphate. it consists of 1p and 4oxygen atoms

\(PO_4^{3-}\)  is a polyatomic ion. Hence, option D is correct.

What is a polyatomic ion?

Polyatomic ions are ions which consist of more than one atom.

The prefix poly- means many, so a polyatomic ion is an ion that contains more than one atom. This differentiates polyatomic ions from monatomic ions, which contain only one atom.

\(PO_4^{3-}\) is a chemical derivative of phosphoric acid with a chemical name Phosphate. Phosphate is also called Phosphate ion or Orthophosphate.

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Answer: Yes it can help make cake rise.

Explanation: Its a leavening agent and its a good ingredient for baking.

Answer:

Here is a sample sale pitch poster about solar energy:

"Go Solar with Confidence!

Are you tired of rising energy costs and looking for a more sustainable solution? Solar energy is the answer!

Pros:

Solar energy is a clean and renewable source of electricity. It doesn't produce any harmful greenhouse gases or pollutants, making it a great choice for the environment.

Solar panels are easy to install and maintain, with a lifespan of 25-30 years.

Solar energy can save you money on your energy bills, especially if you live in a sunny location.

Cons:

The initial cost of installing solar panels can be high, although there are various financing options available to help offset this expense.

Solar energy is not always reliable, as it depends on the availability of sunlight. However, advances in solar panel technology have made it possible to generate electricity even on cloudy days.

Why is it great?

Solar energy is a reliable and cost-effective way to generate electricity for your home or business. It can help you reduce your carbon footprint and protect the environment for future generations.

Why is it bad?

The upfront cost of installing solar panels can be a barrier for some people. However, the long-term financial benefits of switching to solar energy can far outweigh this initial investment.

Can you overcome those downfalls?

Yes, by exploring financing options and taking advantage of government incentives and rebates, you can make the switch to solar energy more affordable.

Be to the point:

Solar energy is a clean, renewable, and cost-effective way to generate electricity. It has a long lifespan and can save you money on your energy bills. Don't wait any longer - make the switch to solar today!"

The final temperature of the mixture is 20.7°C.

When a 50.0 g sample of aluminum at 90.0°C is added to a 250.0 g sample of water at 15.0°C, the final temperature of the mixture can be determined using the equation for specific heat capacity (Q = mcΔT). Firstly, we need to determine the amount of heat released by the aluminum: Q1 = m1c1ΔT1= 50.0 g × 0.903 J/g°C × (90.0°C - T).

Next, we determine the amount of heat absorbed by the water: Q2 = m2c2ΔT2= 250.0 g × 4.184 J/g°C × (T - 15.0°C)Since the heat gained by the water equals the heat lost by the aluminum, we can set Q1 equal to Q2:50.0 g × 0.903 J/g°C × (90.0°C - T) = 250.0 g × 4.184 J/g°C × (T - 15.0°C). Solving for T, we get:T = 20.7°C. Therefore, the final temperature of the mixture is 20.7°C.

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Explanation:

Heavy chemicals generally refer to chemicals that have a high molecular weight and density, such as metals, minerals, and petrochemicals. They may also have a high toxicity and be hazardous to human health and the environment. Some examples of heavy chemicals include lead, mercury, asbestos, and radioactive materials.

Fine chemicals, on the other hand, are typically smaller molecules that are used in the production of pharmaceuticals, agrochemicals, and other specialty chemicals. They are often produced in smaller quantities and require more specialized manufacturing processes. Examples of fine chemicals include vitamins, amino acids, and specialty solvents.

To identify heavy chemicals and fine chemicals, you can look at their molecular structure, physical properties, and intended use. Heavy chemicals may have a higher melting point, boiling point, and density compared to fine chemicals. Fine chemicals may have a more complex molecular structure and be used in pharmaceuticals or other high-value applications.

Answer:

1.1 × 10²⁴ atoms Mg

General Formulas and Concepts:

Atomic Structure

Stoichiometry

Explanation:

Step 1: Define

Identify

[Given] 1.8 mol Mg

[Solve] atoms Mg

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

1.08396 × 10²⁴ atoms Mg ≈ 1.1 × 10²⁴ atoms Mg

Answer:  1.0836 * 10^24 atoms

This value is approximate

===========================================================

Explanation:

1 mole = 6.02*10^23 atoms approximately

This applies to any element.

Multiply both sides by 1.8 and we get...

1 mole = 6.02*10^23 atoms

1.8*1 mole = 1.8*6.02*10^23 atoms

1.8 mole = 10.836*10^23 atoms

1.8 mole = (1.0836*10)*10^23 atoms

1.8 mole = 1.0836 * 10^(1+23)

1.8 mole = 1.0836 * 10^24 atoms

Answer:

B

Explanation:

(Usually give an explanation, but doing an exam, so just trust)

The Mass percent of sugar in the sample was 66% while the Total percent recovery is 95.7%

An equation is an expression used to show the relationship between two or more variables and numbers.

Given the sample had a mass of 53.5g, hence:

Mass percent of sugar in the sample = (35.2/53.5) * 100% = 66%

Total percent recovery = [(35.2 + 16)/ 53.5] * 100% = 95.7%

The Mass percent of sugar in the sample was 66% while the Total percent recovery is 95.7%

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Answer: To determine the pressure change of a gas when it is heated at constant volume, we can use the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin.

Since the volume of the gas is constant, we can simplify the equation to:

P/T = nR/V

The quantity nR/V is a constant, which means that P/T is also a constant at constant volume. Therefore, we can use the following equation to calculate the pressure at a new temperature:

P2/T2 = P1/T1

where P1 and T1 are the initial pressure and temperature, and P2 and T2 are the final pressure and temperature.

We can convert the temperatures to Kelvin by adding 273.15:

T1 = 30.0 °C + 273.15 = 303.15 K

T2 = 40.0 °C + 273.15 = 313.15 K

We can plug in the given values and solve for P2:

P2/313.15 K = 2.50 atm/303.15 K

P2 = (2.50 atm)(313.15 K)/(303.15 K)

P2 = 2.58 atm

Therefore, the pressure of the gas increases from 2.50 atm to 2.58 atm when it is heated from 30.0 °C to 40.0 °C at constant volume.

Explanation:

Answer:

A option

Explanation:

water gets split in photosynthesis

Answer:

check the attached image. hope it helps

Explanation:

a. What does mol/L mean? mol/L means Molar Concentration

b. Describe in your own words how mol/L compares to grams/liter. (similarities and differences)

Similarities: mol/L and grams/liter both are units of concentration.

Differences:

mol/L concentration says how many moles of solute are present in 1L of solution.

grams/liter concentration says how many grams of solute are present in 1L of solution.

3. Describe at least 2 ways in the simulation to change each of the parameters:

a. Volume of solution= evaporating or adding more water

b. amount of solute=reducing the water or evaporating more water

c. Concentration of solute in solution = evaporating or adding more solute

Answer:

I hope this is right :)

empirical formula ---› molecular formula

The half-life for the decomposition of substrate 1 when the initial concentration is 2.01 M cannot be determined from the given data.

The half-life of a reaction is the time it takes for the concentration of the reactant to decrease by half. In this case, we are given the initial rate data for the decomposition of substrate 1 at different concentrations, but we don't have information on the rate of change of concentration over time.

To determine the half-life, we need to observe the decrease in concentration over a period of time and calculate the time it takes for the concentration to decrease by half. However, the given data only provides information about the initial rates of the reaction at different substrate concentrations, which is not sufficient to determine the half-life.

To determine the half-life, additional data points with corresponding concentrations and reaction times would be required. With such data, we could plot a graph of concentration versus time and determine the time it takes for the concentration to reach half of its initial value.

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Explanation:

Silicon (symbol Si) is a group 14 metalloid.

Answer:

hope it helps you

Explanation:

Once one shell is full, the next electron that is added has to move to the next shell. So... for the element of NEON, you already know that the atomic number tells you the number of electrons. That means there are 10 electrons in a neon atom.

The emf of a voltaic cell can be determined using the Nernst equation: E = E° - (RT/nF)ln(Q), where E is the emf, E° is the standard emf, R is the gas constant, T is the temperature in kelvin, n is the number of electrons transferred in the reaction, F is the Faraday constant, and Q is the reaction quotient.

In this case, the reaction is: \(Zn(s) + Ni^{2+} _{(aq)} = Zn^{2+}_{(aq)} (aq) + Ni(s)\) with a standard emf of E° = -0.761 V. The reaction quotient can be calculated using the concentrations of the products and reactants: Q = \([Zn^{2+} ][Ni(s)] / [Zn(s)][Ni^{2} ].\)

Under standard conditions, the concentrations of the products and reactants are 1 M and the reaction quotient is 1. Therefore, the Nernst equation simplifies to E = E° = -0.761 V.

The emf of the cell under standard conditions is -0.761 V.

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The equilibrium constant for the reaction at 25 degrees Celsius is approximately 236.8. The value of the equilibrium constant depends on the temperature at which the reaction is taking place.

The relationship between the standard free energy change (ΔG°), the equilibrium constant (K), and the temperature (T) is given by the following equation:

ΔG° = -RTlnK

where R is the gas constant (8.314 J/(mol K) or 1.987 cal/(mol K)) and ln is the natural logarithm.

First, we need to convert the standard free energy change from kilojoules per mole to joules per mole:

ΔG° = -13.50 kJ/mol = -13,500 J/mol

Next, we can substitute the values into the equation and solve for K:

-ΔG°/RT = lnK

-K = e^(-ΔG°/RT)

-K = e^(-(−13,500 J/mol) / (8.314 J/(mol K) × 298 K))

-K = e⁵.⁴⁶

-K = 236.8

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Since there are mutations in the lacZ and lacY genes (lacz- and lacy-), only the LacA protein, encoded by the laca+ allele, is functional. Therefore, the phenotype is Lacz- LacY+ LacA+.

Based on the given genotype, the phenotype of the E. coli merodiploid strain in the absence (-) or presence (+) of IPTG can be determined as follows:

IPTG: Lacz- LacY- LacA+

IPTG: Lacz- LacY+ LacA+

In the absence of IPTG, the lac operon is not induced, and the lac repressor protein encoded by the lacl° allele is non-functional. Therefore, it cannot bind to the operator region, allowing the transcription of lacZ, lacY, and lacA genes. However, since there are mutations in the lacZ and lacY genes (lacz- and lacy-), the LacZ and LacY proteins are not produced. The LacA protein, encoded by the laca+ allele, is functional, resulting in the phenotype Lacz- LacY- LacA+.

IPTG: Lacz- LacY+ LacA+

In the presence of IPTG, IPTG acts as an inducer of the lac operon. It binds to the repressor protein encoded by the lacl° allele, causing a conformational change that prevents it from binding to the operator. This allows transcription of the lacZ, lacY, and lacA genes. However, since there are mutations in the lacZ and lacY genes (lacz- and lacy-), only the LacA protein, encoded by the laca+ allele, is functional. Therefore, the phenotype is Lacz- LacY+ LacA+.

So, the correct answer is A. - IPTG: Lacz- LacY- LacA+

IPTG: Lacz- LacY+ LacA+.

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Answer: Troposphere

Explanation:

In the troposphere, as altitude increases in the troposphere, the amount of water vapor decreases.

The chemical waste situation that should always be supervised or performed by an instructor is cleaning up a broken mercury thermometer. Mercury is a toxic substance that poses severe health risks, and its vapors can be inhaled or absorbed through the skin.

It is crucial to handle a mercury spill with extreme care and adhere to proper disposal procedures to minimize exposure and prevent environmental contamination.
Although cleaning up solutions from a titration experiment, solid residue from a precipitation experiment, and a broken beaker containing sodium chloride solution are essential tasks, they usually involve lower risks compared to handling mercury. In these cases, students may clean up the waste themselves while following the appropriate safety guidelines, but it is still recommended to alert the instructor about the incident for proper guidance and supervision.The chemical waste situation that should always be supervised or performed by an instructor is cleaning up a broken mercury thermometer. Mercury is a toxic substance that poses severe health risks, and its vapors can be inhaled or absorbed through the skin.
In summary, always prioritize safety and seek your instructor's assistance when dealing with hazardous substances like mercury to ensure proper handling and disposal.

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neon the answer as the electron arrangement is 2,8

The observations regarding the differences in ionization energy can be explained by understanding the concept of electron configuration and the placement of electrons in energy levels.

1. Second and Third Ionization Energy of Magnesium:
When an atom loses an electron to form a cation, the energy required is called ionization energy. In the case of magnesium, the first ionization energy corresponds to the energy needed to remove the first valence electron. The second ionization energy, on the other hand, is the energy required to remove the second electron from the now positively charged ion.

The second electron in magnesium is located in a lower energy level than the first valence electron. It is closer to the nucleus and thus more strongly attracted. Therefore, it requires more energy to remove this electron compared to the first valence electron.

Now, the third ionization energy of magnesium is even higher because it involves removing an electron from the next energy level, which is even closer to the nucleus. As we move closer to the nucleus, the attraction between the positive nucleus and the negatively charged electrons increases, making it more difficult to remove an electron.

2. Third and Fourth Ionization Energy of Aluminum:
Similarly, in the case of aluminum, the third ionization energy represents the energy required to remove an electron from the third energy level. This energy is significantly higher than the second ionization energy because the third energy level is closer to the nucleus and the attraction between the nucleus and the electrons is stronger.

Moving on to the fourth ionization energy, it involves removing an electron from the next energy level, which is even closer to the nucleus. As mentioned earlier, the closer an electron is to the nucleus, the stronger the attraction, and the more energy is required to remove it.

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The molar mass of I2 : 283.81 g/mol

Given

I2 compound

Required

The molar mass

Solution

Relative atomic mass (Ar) of element : the average atomic mass of its isotopes  

Relative molecular weight (M) : The sum of the relative atomic mass of Ar  

M AxBy = (x.Ar A + y. Ar B)  

So for I2 :

= 2 x Ar I

= 2 x 126.90447 g/mol

= 253. 809 g/mol

= 253.81 g/mol

Answer:

ecosystem

Ecosystems include both biotic and abiotic factors

We must first determine how many moles of Mg(OH)2 are in the solution in order to determine its molarity:

Compute Mg(OH)2's molar mass:

mol Mg = 24.31 g

O = 15.99 g/mol

H = 1.01 g/mol

Mg(OH)2 has a molar mass of 24.31 plus 2(15.99) plus 2(1.01), or 58.33 g/mol.

Determine how many moles of Mg(OH)2 there are:

Mass / molar mass = number of moles

1.925 moles are obtained by multiplying 112.3 g by 58.33 g/mol.

Determine the solution's molarity:

Molarity is equal to the moles of solute per litre of solution.

Molarity = 1.925 moles/1.2 litres = 1.60 M

As a result, the molarity of the solution created by combining 1.2 L of water with 112.3 g of Mg(OH)2 is 1.60 M.

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