what is the ph of 0.034 m hno3?

Your limiting agent, salicylic acid, has a molar mass of 138.12 g/mol. Your product, aspirin, does have an molecular weight average of 180.15 g/mol. Methyl salicylate volume = 0.259 mL

Salicylic acid applied topically heals acne by bringing down redness and swelling and clearing clogged skin pores to encourage pimples to contract. By softer and looserning dry, scaly, or thicker skin so that it slips off or is removed easily, it addresses other skin disorders.

Briefing

mass = number of moles * molar mass

molecular weight of methyl salicylate is 152.1 g/mol

number of moles = 2 mmol = 0.002 moles

mass = 0.002 moles * 152.1 g/mol

mass of methyl salicylate = 0.3042 g

Volume is determined from the density and mass

Volume = mass/density

volume of methyl salicylate = 0.3042 g/ 1.174 g/ml

volume of methyl salicylate = 0.259 mL

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A percent saturated solution of ammonium sulfate denotes the maximum quantity of solute whereas a percent w/v solution of ammonium sulfate denotes the weight-to-volume ratio.

X% saturated denotes that X% of the maximum quantity of solute (saturation) that can be present in the solvent at that temperature.The ratio of the solute dissolved in a solution to the solute dissolved in the solution at saturation is known as the percent saturated solution of ammonium sulphate.

Although X% w/v seems like a weight-to-volume ratio, it actually needs to be expressed in other measures, such as grams of ammonium sulphate per litre of water, rather than %.The amount of ammonium sulphate (gm) in the solution is expressed as a percent by weight solution of ammonium sulphate (ml).

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Hbr(aq) h2o(l)→h3o (aq) (aq) br−(aq) Write your responses in chemical terms. Enter your responses using commas to separate them in the question's sequence. Compound acid - H3O+, Composite base - Br-, Bronsted-lowry acid - HBr, and Brønsted - lowry bases - H2O.

Any material with a different compositions is a chemical. To put it another way, every chemical always consists with same "stuff." There are some substances in nature, like water. Other chemicals, including chlorine, are produced Covalent compounds hold together molecules, ionic compounds hold together ions, metallic bonds keep together intermetallic compounds, and coordinate covalent bonds hold coordination complexes together.

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The solubility of carbon dioxide (CO2) in water depends on several factors, including temperature and pressure. Generally, as pressure increases, the solubility of CO2 in water also increases.

To determine the specific pressure at which CO2 gas would be more soluble in 100g of water, we would need additional information. The solubility of CO2 in water is typically expressed in terms of partial pressure, given in units such as atmospheres (atm) or kilopascals (kPa). Additionally, the temperature of the water is a crucial factor in determining solubility.

If you provide the temperature and the solubility data for CO2 in water at that temperature, I can help you calculate the pressure at which CO2 gas would be more soluble in 100g of water.

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Answer:

D. Stock Solution

Explanation:

A concentrated solution of a common reagent that can be diluted and used in reactions is called a Stock Solution.

Considering the definition of stock solution, a concentrated solution of a common reagent that can be diluted and used in reactions is called stock solution.

A stock solution is a highly concentrated solution. Stock solutions are very useful because they allow a portion to be diluted to obtain the desired concentration.

That is, the mother solution is at a higher concentration than the one used, and from this a dilution is made to prepare the solution at the desired concentration of use.

A stock solution is a large volume of chemical reagent. It has a standardized concentration, this is, it has a precisely known concentration.

A concentrated solution of a common reagent that can be diluted and used in reactions is called stock solution.

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Explanation:

chemical energy electric energy light energy heat energy

When a person turns on a lightbulb by connecting its circuit to a battery, several energy transformations occur. There are  three types of energy transformations involved in the process.

1. Electrical to Light Energy:

When the circuit is completed by connecting the lightbulb to the battery, electrical energy from the battery flows through the circuit and enters the lightbulb. Inside the lightbulb, this electrical energy is transformed into light energy. The lightbulb contains a filament that heats up due to the flow of electricity, causing it to emit light. Therefore, electrical energy is transformed into light energy in this process.

2. Chemical to Electrical Energy:

The battery stores chemical energy, which is converted into electrical energy when the circuit is closed. Inside the battery, chemical reactions occur, generating a flow of electrons. These electrons create an electric current, which then travels through the circuit and powers the lightbulb. So, in this step, chemical energy from the battery is transformed into electrical energy.

3. Chemical to Heat Energy:

As electrical energy passes through the filament in the light bulb, some of it is converted into heat energy. The resistance of the filament causes it to heat up, and this heat energy is released into the surroundings. This is why a light bulb feels warm when it has been turned on for some time. Thus, in this step, electrical energy is transformed into heat energy.

Thus,electrical energy from the battery is transformed into light energy in the light bulb. Chemical energy in the battery is converted into electrical energy to power the lightbulb. Electrical energy passing through the light bulb's filament is transformed into heat energy.

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Answer: D

Explanation:

D - Decomposition of carbonates into oxide and carbon dioxide

A - Combustion reaction. Combustion of methane to form Carbon dioxide and water.

C - Reaction of reactive metal (Na) and water to form hydroxide.

B - No particular name of the reaction. Usually denoted as a synthesis redox reaction.

Answer:CaCO3  CaO + CO2

Explanation: just took it

The solution's new concentration can be calculated to be 0.0147 M.

The dilution formula is used to calculate the concentration of a solution after dilution based on the initial concentration and the dilution factor. The dilution factor is defined as the ratio of the final volume to the initial volume.

The formula for dilution is

C1V1 = C2V2

where C2 is the solution's final concentration, V2 is the solution's final volume after dilution, C1 is the solution's original concentration, and V1 is its starting volume.

employing the dilution formula;

0.1176 * 30 = x * 240

x = 0.0147 M

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Bond between nitrogen of ammonia and boron of ammonia-boron trifluoride complex is coordinate covalent bond .

A coordinate bond  is a covalent bond (a shared pair of electrons) in which both electrons come from the same atom

A reaction that involves the formation of a coordinate covalent bond is here :

Reaction: NH₃ (ammonia) + BF₃ (boron trifluoride)   ->   H₃N⁺→B⁻F₃ (ammonia-boron trifluoride complex)

In this reaction, a coordinate covalent bond is formed between the nitrogen atom (N) in NH₃ and the boron atom (B) in BF₃. The nitrogen atom donates its lone pair of electrons to the boron atom, forming a new bond. This bond is the coordinate covalent bond in the ammonia-boron trifluoride complex.

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Answer:

Electrostatic repulsion, strong nuclear force

Explanation:

The nucleus consists of protons and neutrons. protons are positively charged while neutrons possess no charge.

Since protons are positively charged, they repel each other strongly (like charges repel). This strong repulsion of like charges makes the nucleus somewhat unstable leading to spontaneous fission of heavy nuclei.

However, an opposing force called nuclear attractive force tends to hold the nucleons together. This attraction occurs when two nucleons are bonded by a particle called a π meson.

Hence, the two forces that act in the nucleus to create a  'nuclear tug-of-war' are electrostatic repulsion and a strong nuclear force.

The following functional groups in order from most polar to least polar are as follows:

C-OH > C=O > COOH > C-NH₂ > C-CH₃T

he functional group with the highest polarity is the C-OH group while the least polar is the C-CH₃group. The polar functional groups can be defined as groups that exhibit a dipole moment, with one end of the molecule being more electronegative than the other end. The greater the electronegativity of the atom, the greater the polarity of the functional group.

Consequently, the polar nature of a functional group is proportional to the electronegativity of the atom bonded to the carbon atom. The C-OH group has the highest polarity due to the presence of an oxygen atom, which is one of the most electronegative elements.

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Answer: The answer is 457.9

Explanation: Realistically all you have to do is add both of the temperatures and then you can figure out the original heat. Since the heat drops 426.7 degrees and it comes to 31.2 degrees its 426.7 + 31.2 = 457.9.

Answer:

D. Sound waves transfer energy through the vibration of particles in mediums.

Explanation:

It can be concluded from the experiment that sound waves will only propagate through vibration of particles in mediums.

The particles of the medium is the air.

Option A ; Sound waves are transverse waves; while this might be true or not, we cannot ascertain that through this experiment described.

Option B: this negates the conclusion that should be drawn from the experiment.

Option C: we cannot draw this sort of conclusion from such an experiment as this.

Therefore, the right choice is that, sound waves transfer energy through the vibration of particles in mediums.

If 13 % of the carbon-14 in a sample of cotton cloth remains, what's the approximate age of the cloth?

To solve a half-life problem we usually use this formula:

amount remaining = initial amount (1/2)^n

Where n is the number of half-lives. We can replace n for T/Thalf:

amount remaining = initial amount (1/2)^(T/Thalf)

Where t is the age or time elapsed and Thalf is the half-life or our isotope. The half life of C-14 is 5730 years. Then:

Thalf = 5730 years

Let's supose that the cotton cloth originally had 100 g of C-14. If 13 % remains, the amount remaining is 13 g. So:

amount remaining = 13 g initial amount 100 g

Rearranging the formula we get:

amount remaining = initial amount (1/2)^(T/Thalf)

amount remaining/initial amount = (1/2)^(T/Thalf)

ln (amount remaining/initial amount) = ln [(1/2)^(T/Thalf)]

ln (amount remaining/initial amount) = (T/Thalf) *ln (1/2)

T = Thalf * ln (amount remaining/initial amount) /ln (1/2)

Now we can replace the given values:

T = 5730 years * ln(13 g/100g) / ln(1/2)

T = 5730 years * ln(0.13)/ln(0.5)

T = 5730 years * 2.94

T = 16825 years

Answer: the approximate age of the cloth is 16825 years.

The correct volume of this wood block which has the given dimensions is 254.23 cubic cm.

In Science, a significant figure can be defined as the number of digits in a numerical data (value), typically a measurement from an experiment, which enhances its degree of accuracy.

By dimension, a wood block is a rectangular prism. Mathematically, the volume of a rectangular prism should be calculated by using this formula:

V = L × W × H

Where:

Substituting the given parameters into the formula, we have;

V = 7.50 × 7.45 × 4.55

Volume, V = 254.23 cubic centimeters.

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Answer:

See explanation

Explanation:

For the equilibrium; A + B ⇄C + D

At time = 0 secs, the concentration of products is zero while the concentration of reactants decreases steadily.

As time goes on, the concentration of the reactants continues to decrease while the concentration of products increases.

At equilibrium the concentration of both reactants and products are now the same because the rate of forward reaction is equal to the rate of reverse reaction are now the same.

Answer:

i beleive iron

Explanation:

Answer:

The Braille is the dots arranged in cell to identify the letter, number and symbols. the Braille system is identified using the fingers. the fingertip is used for identifying the nature of number and symbol. the difference is made by detecting the number and symbol.

Explanation:

Hope this helped Mark BRAINLEST!!!!

Answer: False

Explanation: Endothermic means it absorbs heat energy.

The conversion of mercury-198 to gold-198 by neutron bombardment can be represented by the following balanced nuclear equation:

^198Hg + ^1n -> ^199Hg -> ^199Au + β^- + antineutrino

In this equation, a neutron (^1n) is absorbed by mercury-198 (^198Hg), producing the unstable isotope mercury-199 (^199Hg), which then undergoes beta decay, emitting a beta particle (β^-) and an antineutrino, while transforming into gold-199 (^199Au).

Note that the beta decay is necessary to maintain the atomic number conservation, as the initial mercury-198 has atomic number 80, while gold-198 has atomic number 79.

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Answer:

Sir James Chadwick discovered proton  

Explanation:

Sir James Chadwick,  was a British physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932. In 1941, he wrote the final draft of the MAUD Report, which inspired the U.S. government to begin serious atomic bomb research efforts.

The overall enthalpy of the reaction is -131.3 kJ.

To calculate the overall enthalpy of the reaction, you need to manipulate the given equations and combine them in a way that cancels out the common substances. Let's analyze each equation:

1: C (s) + O₂ (g) -> CO₂ (g)   ΔH₁ = -393.5 kJ

2: 2CO (g) + O₂ (g) -> 2CO₂ (g)   ΔH₂ = -566.0 kJ

3: 2H₂O (g) -> 2H₂ (g) + O₂ (g)   ΔH₃ = 483.6 kJ

To obtain the overall reaction: C (s) + H₂O (g) -> CO (g) + H₂(g), we can manipulate the equations as follows:

1: Reverse equation 1 to obtain: CO₂ (g) -> C (s) + O₂ (g)   ΔH₁' = +393.5 kJ

2: Halve equation 2 to obtain: CO (g) + 1/2 O₂ (g) -> CO₂ (g)   ΔH₂' = -283.0 kJ

3: Reverse and halve equation 3 to obtain: H₂ (g) + 1/2 O₂ (g) -> H₂O (g)   ΔH₃' = -241.8 kJ

Now, we can sum up the manipulated equations to obtain the overall reaction:

CO₂ (g) + CO (g) + H₂ (g) + 1/2 O₂ (g) -> C (s) + 2CO₂ (g) + H₂O (g) + 1/2 O₂ (g)

To calculate the overall enthalpy change (ΔHrxn), we sum up the enthalpy changes of the manipulated equations:

ΔHrxn = ΔH₁' + ΔH₂' + ΔH₃'

      = 393.5 kJ + (-283.0 kJ) + (-241.8 kJ)

      = -131.3 kJ

Therefore, the overall enthalpy of the reaction is -131.3 kJ.

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Answer:Because you need that certain number and double the number of bread to get the reactants off of the sides

Explanation: 4 bread reactants- 2meat reactants- 2 cheese reactants= 2 products

The reason for the presence of a certain number of reactants on one side is to ensure that the chemical equation is balanced.

In a balanced chemical equation, the number of atoms of each element on the reactant side must be equal to the number of atoms of that element on the product side.

Consider the equation:

\(2H_2 + O_2 - > 2H_2O.\)

This equation represents the reaction of hydrogen gas (\(H_2\)) with oxygen gas (\(O_2\)) to form water (\(H_2O\)).

To balance this equation, double the coefficient in front of \(H_2O\) on the product side, resulting in 4 hydrogen atoms and 2 oxygen atoms on both sides.

Therefore, having a certain number of reactants on one side is necessary to ensure that a chemical equation is balanced, satisfying the law of conservation of mass.

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Answer:

iiiiiiddddiiilllooeiuehe

The person will live  73.62 years

The heartbeats 80 times in 1 minute

Therefore , 1 heartbeat takes \(1/80 minutes\) time

In whole life number of heartbeats = \(3.1* 10^{9}\)

Thus, time in which \(3.1* 10^{9}\) heart beat will occur = \(3.1* 10^{9} * 1/80 minutes\)

                                                                                  = \(0.03875 * 10^{9}\) minutes

Since 1 minutes =\(1.90259 * 10^{-6}\) year

Therefore,  \(0.3875 * 10^{9}\) minutes = \(0.03875 * 10^{9}\) * \(1.90259 * 10^{-6}\) year

                                                     = \(.073625* 10^3\) years

                                                     = 73.62 years

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Answer:

Mass of Magnesium Chloride = 26.85 grams

Percentage of Magnesium= 25.5 %

Percentage of Chlorine =74.5 %

Explanation:

Mass of Magnesium Chloride= Mass of magnesium + Mass of Chlorine        6.85 grams + 20.0 grams = 26.85 grams

Percentage of Magnesium = 6.85 grams/26.85 grams x 100% = 25.5%

Hence, Magnesium = 25.5 %

Percentage of Chlorine = (20.0 grams/26.85 grams) x 100 % = 74.5%

Hence, Chlorine = 74.5 %

So, the compound is 25.5 % magnesium and 74.5 % Chlorine by mass.

It is a greenhouse gas that is easily observable and remains in the atmosphere for generations, so focus on carbon dioxide.

Carbon dioxide is an critical greenhouse gasoline that allows to trap heat in our ecosystem. without it, our planet could be inhospitably bloodless. But, an increase in CO₂ concentrations in our atmosphere is inflicting common international temperatures to rise, disrupting different components of Earth's weather.

Carbon dioxide is called a greenhouse fuel due to the fact it is one of the gases in the atmosphere that warms the Earth via a phenomenon referred to as the greenhouse effect. Carbon dioxide molecules within the atmosphere soak up long-wavelength infrared electricity from the Earth after which re-radiate it, some of it returned downward.

Carbon dioxide is simplest a part of that equation, and most effective the second one maximum considerable greenhouse gasoline on this planet. At the top of the list is water vapor, the granddaddy of all greenhouse gases.

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Enabling auto-tagging allows for automatic tagging of certain attributes or information within a system or program.

This can save time and effort by eliminating the need for manual tagging and ensuring accuracy in the tagging process. Enabling auto-tagging is a process that allows an analytics or advertising platform to automatically assign tags to specific elements in a campaign or website. This helps in tracking and organizing data more efficiently, making it easier to analyze and optimize your online presence. When auto-tagging is enabled, the system will automatically generate and add tags to your URLs or content without the need for manual input, saving time and effort.

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When 156.32 g of barium hydroxide is reacted, approximately 142.34 g of aluminum hydroxide can be produced, based on the balanced chemical equation and stoichiometry.

To determine the amount of aluminum hydroxide that can be produced when 156.32 g of barium hydroxide is reacted, we need to consider the balanced chemical equation for the reaction and use stoichiometry.

The balanced chemical equation for the reaction is:

Ba(OH)2 + 2AlCl3 → 2Al(OH)3 + 3BaCl2

From the balanced equation, we can see that for every 1 mole of Ba(OH)2, 2 moles of Al(OH)3 are produced.

First, we need to calculate the number of moles of barium hydroxide (Ba(OH)2) in 156.32 g:

Molar mass of Ba(OH)2 = (137.33 g/mol + 2(16.00 g/mol + 1.01 g/mol)) = 171.34 g/mol

Moles of Ba(OH)2 = mass / molar mass = 156.32 g / 171.34 g/mol = 0.911 mol

Now, using the stoichiometry of the balanced equation, we can determine the moles of aluminum hydroxide (Al(OH)3) produced:

Moles of Al(OH)3 = 2 × Moles of Ba(OH)2 = 2 × 0.911 mol = 1.822 mol

Finally, to convert the moles of aluminum hydroxide to grams, we need to multiply by the molar mass of Al(OH)3:

Molar mass of Al(OH)3 = (26.98 g/mol + 3(16.00 g/mol + 1.01 g/mol)) = 78.00 g/mol

Mass of Al(OH)3 = Moles of Al(OH)3 × molar mass = 1.822 mol × 78.00 g/mol = 142.34 g

Therefore, when 156.32 g of barium hydroxide is reacted, approximately 142.34 g of aluminum hydroxide can be produced.

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