what acts as a buffer for seawater ?

The concentration of the solution in g per dm cube is 35.24 g/dm cube.

The amount of sand in grams is 0.2 g and the volume of the solution is two-thirds of a litre. We have to find the concentration of the solution in g per dm cube.To find the concentration of the solution in g per dm cube, we need to know the concentration of ethanol. As the concentration of ethanol is not given in the question, let us assume the concentration of ethanol is 100%. Therefore, the volume of ethanol in the solution is

(1 - 2/3) litres= 1/3 litres= 1000/3 mL.

As the density of ethanol is 0.789 g/mL,

the mass of ethanol in the solution is:

0.789 g/mL × 1000/3 mL= 789/3 g

The mass of the solution is:

789/3 g + 0.2 g= 2367/9 g

The volume of the solution in dm cube is:

2/3 L= 0.67 dm cube

The concentration of the solution in g per dm cube is: (2367/9 g)/(0.67 dm cube)≈ 35.24 g/dm cube.

For more question concentration

https://brainly.com/question/28564792

#SPJ8

At 70°C, the solubility of KNO3 in water is approximately 109 grams per 100 grams of water. This means that a solution containing 109 grams of KNO3 in 100 grams of water at 70°C is considered saturated.

If we want to find out how many grams of KNO3 are needed to saturate 100 grams of water at 70°C, we can use the following formula:
s = k * T
where s is the solubility of KNO3 in grams per 100 grams of water, k is a constant that depends on the solute and solvent, and T is the temperature in Celsius.
For KNO3 in water, the value of k is approximately 36.2. Therefore, we can write:
109 = 36.2 * 70
Solving for the unknown variable, we get:
109 / 36.2 = 3.01 grams

This means that at 70°C, 3.01 grams of KNO3 are needed to saturate 100 grams of water. If we add more than 3.01 grams of KNO3 to 100 grams of water at 70°C, the excess will not dissolve and will remain as a solid at the bottom of the container.  It is important to note that the solubility of KNO3 in water varies with temperature, so the saturation point will be different at other temperatures. Additionally, other factors such as pressure and the presence of other solutes can also affect the solubility of KNO3 in water.

For more such questions on solubility

https://brainly.com/question/23946616

#SPJ11

The features that make H₂O a polar molecule are:

It is a bond that occurs when the bonding atoms have a difference in electronegativity causing the generation of an area with higher electron density creating a positive pole and a negative pole.

The oxygen atom in water has a partial negative charge, while the hydrogen atoms have a partial positive charge. This results in an overall dipole moment, with the molecule having a slightly positive end and a slightly negative end.

H₂O is a polar molecule due to its bent molecular shape, an uneven distribution of electron density, and uneven electron distribution within each bond of the molecule. This results in an overall electrical charge for the molecule.

Learn more about polar molecule here https://brainly.com/question/1433127

#SPJ11

Electrons enter the 4s sub-level before the 3d sub-level because the 4s sub-level has a lower energy level than the 3d sub-level.

According to the Aufbau principle, electrons fill the lowest energy levels first before occupying higher energy levels. In the case of the electron configuration of atoms, this means that the 4s sub-level, which has a lower energy than the 3d sub-level, is filled before the 3d sub-level.

Therefore, when electrons are added to an atom, they first fill the 4s sub-level before moving on to the 3d sub-level, even though the 3d sub-level is technically of a higher principal quantum number (n) value. This electron filling order follows the Aufbau principle and the energy levels of the sub-levels.

Learn more about electrons and their energy state at: https://brainly.com/question/14205129

#SPJ11

a. No single microbicidal chemical can completely fulfill all of these requirements.

b. Glutaraldehyde and hydrogen peroxide approach this ideal.

To answer your question about selecting a microbicidal chemical that fulfills certain requirements, such as noncorrosive or nonstaining properties, sanitizing and deodorizing properties, and affordability and ready availability:

Both of these chemicals possess strong microbicidal properties and are relatively affordable and readily available. Additionally, they exhibit some sanitizing and deodorizing properties. It's important to note, however, that no perfect microbicidal chemical exists that meets every requirement completely.

Learn more about microbicidal: https://brainly.com/question/15390106

#SPJ11

Answer:

kmno4 is heated => k2mno4 + mno2 + o2

Hope this helps!

:)

The structure of 4 ethyl 2 isopropylhexanal is:

\(CH_{3} - CH_{2}(C_{2}H_{5} ) - CH_{2} - CH(CH(O)) - CH_{3}\)

What is stereochemistry?

Stereochemistry, a subdiscipline of chemistry, involves the study of the relative spatial arrangements and manipulations of the atoms that make up the structure of molecules. The study of stereochemistry focuses on the relationships between stereoisomers. Stereoisomers, by definition, have the same arrangement (constitution) of the atoms bonded to the molecular formula, but differ in their structural formula (the three-dimensional orientation of the atoms in space). Therefore, it is also called 3D chemistry. The prefix "stereo" means "three-dimensionality".

Stereochemistry covers the entire spectrum of organic, inorganic, biological, physical and especially supramolecular chemistry. Stereochemistry includes methods for determining and describing these relationships. The effect these relationships have on the physical or biological properties of the molecule in question, and how these relationships affect the reactivity of the molecule in question (dynamic stereochemistry).

Hence, the structure of 4 ethyl 2 isopropylhexanal is:

\(CH_{3} - CH_{2}(C_{2}H_{5} ) - CH_{2} - CH(CH(O)) - CH_{3}\)

To know more about stereochemistry, visit:

brainly.com/question/16410505

#SPJ1

Answer: Here u go

Explanation:

If the crest of the wave starts coming closer together, it means that the wave is becoming steeper. When a wave becomes steeper, there is an increased risk of the wave breaking. If the wave does break, the beach ball will likely be pushed down as the wave crashes onto the surface of the ocean. The beach ball may also be tossed around by the turbulent water, causing it to move in different directions. It's possible that the beach ball could be thrown into the air and then come back down onto the surface of the water, depending on the size and strength of the wave.

The waves are known as deep waves. This phenomenon also exists in the field of meteorology, where waves propagate in the interface layer between warm and cold air.

Waves are influenced by many factors :

Learn More About the strength waves at https://brainly.com/question/19349567

#SPJ4

The three technologies used to convert biomass energy into heat and electricity are Combustion, Gasification, Anaerobic Digestion.These technologies enable the efficient utilization of biomass resources, reducing reliance on fossil fuels and contributing to renewable energy generation.

Combustion: Biomass combustion is a widely used technology that involves burning biomass materials, such as wood, agricultural residues, or dedicated energy crops, to produce heat and electricity. In this process, biomass is burned in a controlled manner, and the heat generated is used to produce steam, which drives a turbine connected to a generator. The combustion process releases carbon dioxide (CO2), but since biomass is considered a renewable energy source, the CO2 emitted is part of the natural carbon cycle and does not contribute to net greenhouse gas emissions.

Gasification: Biomass gasification is a thermochemical process that converts biomass into a combustible gas known as syngas. The biomass is subjected to high temperatures in a low-oxygen environment, resulting in the production of syngas, which mainly consists of carbon monoxide (CO), hydrogen (H2), and traces of other gases. The syngas can be used directly for heating purposes or for the production of electricity through internal combustion engines, gas turbines, or fuel cells.

Anaerobic Digestion: Anaerobic digestion is a biological process that breaks down biomass, such as animal manure, crop residues, or organic waste, in the absence of oxygen. During the anaerobic digestion process, microorganisms break down the biomass, producing biogas, which is primarily composed of methane (CH4) and carbon dioxide (CO2). The biogas can be combusted to produce heat and electricity, or it can be upgraded to biomethane and injected into the natural gas grid or used as a transportation fuel.

To know more about biomass energy, click here, https://brainly.com/question/32175810

#SPJ11

Answer:

a) [H₃O⁺] = 1.8x10⁻⁵ M

b) pH = 4.75

c) % rxn = 3.5x10⁻³ %

Explanation:

a) The dissociation reaction of HCN is:

HCN(aq) + H₂O(l) ⇄ H₃O⁺(aq) + CN⁻(aq)

0.5 M - x                       x               x

The dissociation constant from the above reactions is given by:

\(Ka = \frac{[H_{3}O^{+}][CN^{-}]}{[HCN]} = 6.17 \cdot 10^{-10}\)

\( 6.17 \cdot 10^{-10} = \frac{x*x}{(0.5 - x)} \)

\( 6.17 \cdot 10^{-10}*(0.5 - x) - x^{2} = 0 \)

By solving the above quadratic equation we have:

x = 1.75x10⁻⁵ M = 1.8x10⁻⁵ M = [H₃O⁺] = [CN⁻]

Hence, the [H₃O⁺] is 1.8x10⁻⁵ M.

b) The pH is equal to:

\(pH = -log[H_{3}O^{+}] = -log(1.75 \cdot 10^{-5} M) = 4.75\)    

Then, the pH of the HCN solution is 4.75.

c) The % reaction is the % ionization:

\( \% = \frac{x}{[HCN]} \times 100 \)

\( \% = \frac{1.75 \cdot 10^{-5} M}{0.5 M} \times 100 \)

\( \% = 3.5 \cdot 10^{-3} \% \)          

Therefore, the % reaction or % ionization is 3.5x10⁻³ %.

I hope it helps you!      

From the equation ΔG = ΔH – TΔS it is clear that a decrease in the system's total energy will increase the probability of spontaneous change, and increasing the entropy of a system will increase the probability of spontaneous change. The correct option is (D).

The equation ΔG = ΔH - TΔS represents the Gibbs free energy change of a system, where ΔG is the change in free energy, ΔH is the change in enthalpy, T is the temperature in Kelvin, and ΔS is the change in entropy.

In a spontaneous process, the Gibbs free energy change (ΔG) must be negative. From the equation, we can deduce that a decrease in the system's total energy (ΔH) will result in a decrease in ΔG, increasing the probability of spontaneous change.

This is because a decrease in energy makes the process more favorable.

Additionally, an increase in the entropy of a system (ΔS) will also decrease ΔG, leading to an increased probability of spontaneous change.

Entropy represents the degree of disorder or randomness in a system, and an increase in entropy contributes to the system's overall stability and the likelihood of spontaneous processes.

Therefore, both a decrease in the system's total energy and an increase in the entropy of a system contribute to an increased probability of spontaneous change. Hence, the correct option is (D).

To know more about "Entropy" refer here:

https://brainly.com/question/17172535#

#SPJ11

Answer:

8.16×10^-2 is the scientific notation of 0.0816.

Answer:

3.75 L

Explanation:

We can solve this problem by using Charles' law, which states:

Where subscript 1 stands for initial volume and temperature and subscript 2 for final volume and temperature, meaning that in this case:

We input the data:

And solve for V₂:

The fraction of the initial reactant consumed after 6 half-lives is 0.02 (rounded to two decimal places).

In a first-order reaction, the rate of the reaction is proportional to the concentration of the reactant raised to the power of one. The integrated rate law for a first-order reaction is:

ln([R]t/[R]0) = -kt

where [R]t is the concentration of the reactant at time t, [R]0 is the initial concentration of the reactant, k is the rate constant, and t is time.

From the equation, we can see that the natural logarithm of the ratio of the concentration of the reactant at time t to the initial concentration is proportional to time. This means that the concentration of the reactant decreases exponentially over time.

The half-life of a first-order reaction is defined as the time it takes for the concentration of the reactant to decrease by half. The formula for calculating the half-life of a first-order reaction is:

t1/2 = ln(2)/k

Since we are given that the reaction has proceeded for 6 half-lives, the fraction of the initial reactant consumed can be calculated as follows:

Fraction consumed = [R]6t/[R]0 = (1/2)^6 = 0.015625.

Learn more about first-order reaction here:

https://brainly.com/question/1769080

#SPJ11

a. Decreasing alpha from 0.05 to 0.01 makes the significance level more stringent. You will be less likely to reject the null hypothesis, even when it's false. This increases the probability of a Type II error, thus potentially reducing the power of the test. The power curve will shift to the left.

b. If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

The power curve is a graph that shows the probability of rejecting the null hypothesis as a function of the true value of the mean.

In the given scenarios of this study, Reducing the significance level and reducing the sample size will shift the power curve to the left, indicating a decrease in the statistical power of the test.

The power of a statistical test is the probability that it correctly rejects the null hypothesis when the alternative hypothesis is true.

a) Reducing alpha from 0.05 to 0.01 means that we are more stringent in our assessment of whether the new treatment is effective.

This will result in a decrease in the power of the test, meaning that it is less likely that we will be able to detect a difference between the new treatment and the previous treatment.

b) If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

This is because a smaller sample size decreases the power of the test. A larger sample size provides more information and thus makes it more likely to correctly reject the null hypothesis when the alternative hypothesis is true.

Therefore, by reducing the sample size, you are decreasing the likelihood of detecting a true effect if one exists, thus reducing the power of the test.

Find more exercises on alpha level in a study;

https://brainly.com/question/6372035

#SPJ4

Answer:

By cooling the gas in the container the partial pressure of the gas will cause the gas to condense.  Imagine water vapor in a bottle if you cool it down it will condense into droplets as the molecules of gas start to slow down to to lower temp

Explanation:

The numbers in the powers are the number of electrons in a specific orbital. so you can add them to find the atomic number

The halogen or halogen-containing compound is typically used as a form of topical antisepsis will be "iodophor".

Iodine will be employed as an antiseptic in the manner of a tincture of iodine, essentially an alcoholic solution.

Iodophor would be an iodine-containing solution that also contains a solubilizing agent, like povidone or a surfactant. Iodophor would be a common sanitizer in the dairy but also brewing sectors. Generally, a high molecular weight carrier, commonly a polymer, has been polymerized with iodine.

Therefore, the halogen or halogen-containing compound is typically used as a form of topical antisepsis will be "iodophor".

To know more about antisepsis

https://brainly.com/question/15186144

#SPJ4

Answer:

sup brö how is it back home?

Explanation:

just curious you know

Answer:

see explanation

Explanation:                      

Answer:

Its electron configuration is: 2 electrons in the K shell (principal quantum number 1), 8 in the L shell (principal quantum number 2), 8 in the M shell (principal quantum number 3), and 2 in the N shell (principal quantum number 4).

Explanation:

Hope this helped!!! xoxo

t!kt0k: preppydreams

Solids Have a Clear Shape and Volume: The state of matter with a clear shape and volume is called a solid.

A solid is a condition of matter that, even when unconstrained, keeps its shape and density. One of the four basic states of matter is solid. The least energetic molecules are those that are tightly packed together and make up solids. A solid is distinguished by its structural rigidity and resistance to external forces. Particles in solid substance are closely packed. A solid will keep its shape; its constituent parts are not free to move. Particles in liquid substance are more loosely packed. It will adopt the form of its host.

Learn more about Solids

brainly.com/question/30331099

#SPJ4

a) Melting: An example of melting that occurs in our everyday life is when we heat butter on a stovetop.

b) Freezing: Freezing is the process in which a liquid transforms into a solid upon cooling.

c) Condensation: One example of condensation that we encounter regularly is when water droplets form on the surface of a cold drink on a hot day.

d) Evaporation: Evaporation is the process by which a liquid transforms into a gas or vapor.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state.

a) Melting:  Butter is a solid at room temperature, but when heat is applied, it melts into a liquid. This change is a result of the increase in temperature, which provides enough energy to overcome the intermolecular forces holding the butter molecules together.

b) Freezing:Eventually, the temperature reaches the freezing point of water (0°C or 32°F), at which the water molecules slow down and arrange themselves into a regular, crystalline structure. This transformation from a liquid to a solid state is accompanied by the release of heat energy.

c) Condensation: As the temperature decreases, the air's capacity to hold moisture decreases, causing the water vapor in the air to condense into liquid water droplets. This process occurs due to the transfer of heat energy from the warm air to the cold surface, leading to the saturation of the air and the conversion of water vapor into liquid form.

d) Evaporation:  As the sun's heat energy is absorbed by the water molecules on the clothes' surface, their kinetic energy increases, causing them to break free from the liquid phase and escape into the surrounding air as water vapor. This process occurs because the molecules at the liquid surface with sufficient energy can overcome the attractive forces within the liquid and enter the gas phase.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) converting into carbon dioxide gas.

For more such questions on Freezing visit:

https://brainly.com/question/40140

#SPJ8

Answer:

Well, it´s dangerous because it displaces oxygen in the blood and deprives the heart, the brain and other vital organs.

Explanation:

What i mean by that is that breathing carbon monoxide reduces the amount of oxygen that can be transported in the blood stream to critical organs like the heart and brain. It can also causes E.g. dizziness, confusion, unconsciousness and even death.

I hope this answered yor question, if i did misundertood the question do tell me and i will try my best to explain it. Have a nice day!! :)

This chemical is known as lead (II) nitrate. It is an ionic assembly (salt compound) comprised of lead cations in the +2 oxidation state. With regard to the naming convention, each lead (II) cation is paired with two nitrate anions, each having a charge of -1.

Chemical nomenclature is a set of principles for naming chemical substances in a systematic manner. The International Union of Pure and Applied Chemistry designed and developed the most widely used nomenclature in the world (IUPAC).

The basic goal of chemical nomenclature is to guarantee that no ambiguity exists between a spoken or written chemical name and the chemical compound to which the name refers. Each chemical name should only relate to one substance.

It is required to indicate the charge of these cations or compounds containing these cations when identifying them. Ionic compounds are formed when cations and anions interact. The cation of an ionic compound is named first, followed by the anion. When writing their chemical formulae, they use the same format.

Learn more about naming conventions:
https://brainly.com/question/14326884
#SPJ1

Earthquakes and volcanoes are often found in close proximity to each other because they both occur in tectonically active regions.

The association between earthquake and volcanic locations is that they frequently take place adjacent to one another along tectonic plate boundaries. The movement and interaction of tectonic plates, which can cause seismic activity, result in earthquakes.

Volcanoes are frequently created when molten rock (magma) rises to the surface and is sometimes sparked by the same tectonic processes that generate earthquakes. This correlation arises from the fact that both earthquakes and volcanoes are physical representations of the dynamic processes occurring at plate boundaries in the Earth's crust and mantle.

Learn more about earthquakes, here:

https://brainly.com/question/30322293

#SPJ6

Ethanol, propane, and butane are all examples of fuels that contain chemical energy. This chemical energy is stored within the molecules of the fuel and can be released during a chemical reaction, such as combustion, to produce heat and/or light energy.

When ethanol, propane, or butane is burned, the chemical bonds between the atoms within the molecule are broken, releasing energy in the form of heat and light. This energy can then be harnessed for various purposes, such as heating buildings or powering vehicles. Overall, the energy content of a fuel depends on the specific molecules it contains and their chemical structures.

To know more about Ethanol click this link -

brainly.com/question/25002448

#SPJ11