burning biodiesel derived from plant oils does what to the concentration of carbon dioxide in the atmosphere compared to burning fossil fuels derived from drilling for oil? group of answer choices the atmospheric co2 concentration increases the atmospheric co2 concentration stays the same the atmospheric co2 concentration decreases

Ingredients that are designed to dissolve keratin proteins on the surface of the skin are called keratolytic. Keratin is a tough protein that is found in the outer layer of the skin, nails, and hair. When the buildup of keratin occurs on the skin's surface, it can lead to conditions such as rough patches, calluses, and acne. Keratolytic ingredients help to break down and dissolve this buildup, resulting in smoother and softer skin.

Common keratolytic ingredients include salicylic acid, urea, alpha-hydroxy acids (AHAs), and benzoyl peroxide. These ingredients work by exfoliating the skin and promoting cell turnover, which helps to remove the excess keratin and dead skin cells. Keratolytics are often used in skincare products such as cleansers, toners, masks, and exfoliators.

It is important to note that keratolytic can be harsh on the skin if not used correctly. It is recommended to use these products in moderation and to always follow the instructions on the packaging.

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Answer:

In a solution, the solute particles that are in the solvent are evenly mixed and so small that you can't see them. In a suspension, the pieces of solute are large and can be seen floating throughout the solvent. For example, dust floating through the air is a suspension.

Arrhenius acid

An Arrhenius acid is a compound that increases the concentration of H+ ions that are present when added to water. These H+ ions form the hydronium ion (H3O+) when they combine with water molecules.

False. Electrostatic catalysis and covalent bonding interactions are two different types of chemical interactions that occur between atoms and molecules.

Electrostatic catalysis refers to a process in which a catalyst accelerates a chemical reaction by altering the charge distribution around the reactants, without participating in the reaction itself. This process relies on the electrostatic interactions between the catalyst and the reactants, which can help to stabilize the transition state of the reaction and lower the activation energy required for the reaction to proceed.

In contrast, covalent bonding interactions occur when atoms share electrons to form a chemical bond. These interactions are much stronger than electrostatic interactions and involve the sharing of electrons between atoms.

While both types of interactions can play important roles in chemical reactions, electrostatic catalysis does not typically involve covalent bonding interactions. Instead, it relies on the weaker electrostatic interactions between the catalyst and the reactants. These interactions can be enhanced by the geometric and electronic properties of the catalyst, as well as the nature of the reactants and the reaction conditions.

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Answer:

~2.054M

Explanation:

In this question ,I am going to assume that the acid is monoprotic acid(contains only one hydrogen) which I'll represent by HA.

Chemical equation:

NaOH(aq) + HA(aq)----->NaA(aq) + H2O(l)

The mole ratio of NaOH:HA is 1:1

1.25M NaOH=1.25 Moles/L or 1.25 moles /1000ml of NaOH

(1.25 moles /1000ml) x (24.65ml)=0.0308125 moles NaOH

Mole ratio is 1:1

So, moles of HA are also 0.0308125 moles

volume of HA  =15ml

To find molarity of HA:

=(0.0308125 moles x 1000ml)/(15ml)

~2.054M of HA

~Hope it helps:)

Answer:

The three main subatomic particles that form an atom are protons, neutrons, and electrons.

Explanation:

Answer:

The three main subatomic particles that form an atom are protons, neutrons, and electron

The value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.

The expression for calculating 8D of water vapor in isotopic equilibrium with fresh water can be given by: 8D = α 8D (vapor) + (1 - α) 8D (liquid). Where,α is a fractionation factor and 8D (vapor) and 8D (liquid) are the deuterium enrichments in water vapor and liquid, respectively.

The value of α is given by:a (liquid-vapor) = 1.090So,α = (a (liquid-vapor) - 1) / (a (liquid-vapor) + 1)α = (1.090 - 1) / (1.090 + 1)α = 0.045So,8D = α 8D (vapor) + (1 - α) 8D (liquid)Given,8D (liquid) = -65‰ (‰ denotes permil, which is equal to parts per thousand)

Substitute the given values in the expression and simplify:8D = 0.045 × 8D (vapor) + (1 - 0.045) × (-65)8D = 0.045 × 8D (vapor) - 61.9258D + 2.79125 = 8D (vapor)

Therefore,8D (vapor) = 8D - 2.79125= -65 - 2.79125= -67.79125‰ (answer)Therefore, the value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.

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In the laboratory, hydrogen gas is used as fuel for various purposes, including heating. In order to start the heating process, it is necessary to allow the hydrogen gas to flow continuously for a while. This is because there may be air or other gases present in the hydrogen gas pipeline that can affect the heating process.

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Answer:

City B has the larger annual temperature range

Explanation:

This is correct option because generally the northern side of the equator is high in temperature than the southern hemisphere part.

Since the southern side of the equator or Southern Hemisphere, where city A resides will generally have higher altitude or rise, so this creates higher average temperature.

Answer:

Joules

Explanation:

The chemical equation for NaOH(aq) as a base according to the Arrhenius definition is shown below:

NaOH(aq) → Na+(aq) + OH-(aq)H2SO4(aq) is an acid. It is a strong acid and a dehydrating agent.

The chemical equation for H2SO4(aq) as an acid according to the Arrhenius definition is shown below:

H2SO4(aq) → 2H+(aq) + SO42-(aq)Sr(OH)2(aq) is a base.

The chemical equation for Sr(OH)2(aq) as a base according to the Arrhenius definition is shown below:

Sr(OH)2(aq) → Sr2+(aq) + 2OH-(aq)HBr(aq) is an acid. It is a strong acid and a corrosive liquid.

The chemical equation for HBr(aq) as an acid according to the Arrhenius definition is shown below:

HBr(aq) → H+(aq) + Br-(aq)NaOH(aq) is a base.

The chemical equation for NaOH(aq) as a base according to the Arrhenius definition is shown below:

NaOH(aq) → Na+(aq) + OH-(aq)H2SO4(aq) is an acid. It is a strong acid and a dehydrating agent.

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Answer:

-943J or 943J released

Explanation:

m=2.4 mol x 207.g/ mol=497.3g

c=.129 J/gC

T= T f-Ti=(22.5-37.2)=-14.7C

Q=?

Q=(49.3g)(.129 J/g C) (-14.7 C)

= -943 J or 943 J released

Answer:

3.97xx10^-7 meters

Explanation:

Answer:

50.1 mega meters

Explanation:

moving the decimal to the right

Answer:

Rovers

Explanation:

Rovers have been employed in the study of planets other than the earth. For example in 2003, NASA went on an exploration of the planet, Mars with the aid of rovers. Rovers are able to pick up information regarding the biosphere of other planets.

In 2014, NASA also reported the use of the Curiosity and Opportunity Rovers to study the Martian environment. So, rovers are an improvement in technology that can aid our understanding of other planets.

Answer: Ketone

Explanation:

Answer: 37.485 psi

Explanation: using the gas law and assuming that volume is constant due to nor being stated we use the formula

P1/T1=P2/T2

Note that the tempreture should be changed from °C to K by adding 273

According to Newton's second law of motion the acceleration decreases when mass of motor being used inside rockets increases.

What is Newton's Second law of motion?

According to Newton's 2nd law of motion, the acceleration of an object depends on two variables i.e. force and mass.

In simple words, it states that mass and acceleration of an object under constant forces are inversely proportional to each other.

i.e a ∝ F and a ∝ 1/m

Now, we see that in rockets, different motors are used having different masses which adds up to the total mass of the rocket.

So if the mass of the rocket increases, then acceleration decreases.

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Answer:

\(\huge\bf\underline{\underline{\pink{A}\orange{N}\red{S}\green{W}\purple{E}\blue{R}}}\)

ONLY 20.95% IN THE AIR

:)

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If the 8.0 g MgO is produced,  the weight of Mg reacted is 4.68 g.

The reaction is as follows :

2Mg  + O₂  ---->  2MgO

The molar mass of Magnesium = 24.3 g/mol

The molar mass of Oxygen = 16.0 g/mol

The mass of the MgO = 8 g

The moles of the MgO = mass / molar mass

The moles of the MgO = 8 / 40

The moles of the MgO = 0.2 mol

2 moles of the MgO is produced by the 2 moles og the Mg

The number of the moles of the Mg = 0.2 mol

The mass of the Mg = moles × molar mass

The mass of the Mg = 0.2 × 23.4

The mass of the Mg = 4.68 g

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Answer:

this is my old account and these still dont have answers

Explanation:

Answer:

II and III

Explanation:

(second and third)

Matter is made of particles. Which can be best explained using the model of dissolving salt in water forming a salt solution.Thus option 2 is correct.

A solution is made of a solvent solute particles. A compound is made from the combination of one or more different atoms. Thus the basic unit of every substances is atoms. Atoms are made of subatomic particles electrons, protons and neutrons.

In a compound the basic units that its molecules can be called as the constituent particles of the compound. Similarly for a solution the constituent particles are solvent molecules and solute molecules.

When we dissolve salt in water, the salt molecules are combining with the solvent molecules and forming a compound. Hence, we are making a  compound by it constituent particles. Thus, option 2 is correct.

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They are the group one elements

All the elements in group 1 have similar chemical and physical properties, such as low densities, low melting points, and high reactivity. They are all soft metals that can easily be cut with a knife and have a single valence electron in their outermost shell, making them highly reactive and prone to forming ionic compounds with non-metals.

Hydrogen is technically not considered an alkali metal, but it is often included in discussions of group 1 elements due to its similar properties.

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The force that the tri ceps muscle exerts on the fore arm when you lift a 17g  with your hand is 1323 N

Data;

The sum of moment of a force about a point is equal to zero.

∑m = 0

\(x*5 - 17 * 9.8*35 -5 * 9.8 * 16 = 0\\5x - 6615 = 0\\x = 1323N\)

The force that the triceps muscle exerts on the forearm when you lift a 17g with your hand. Assuming the is I = 0.35m from the elbow join and the  is d = 0.05m from the joint is 1323N

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Emulsion polymerization is a radical polymerization technique that uses a monomer, emulsion-containing water, and a surfactant. Polystyrene for general use is transparent, rigid, and brittle.Per unit weight, it is a reasonably priced resin.

However, a number of techniques, including desolvation, hemodialysis, ionic gelation, holding the other variables, solvent extraction, salting out, spray drying, and supercritical fluid, are employed to create polymeric nanoparticles.However, a number of considerations must be taken into consideration while choosing a strategy.

Twin-screw extruders were created primarily to make mixing and compounding procedures easier, but they are also used as polymerization reactors.

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The reaction between H2SO4 in a mixture of KI and MnO2 yields iodine which reacts with hypo solution​ by titration and the iodine is decolorized.

Iodine is decolorized.

The first reaction stated in the question occurs as follows;

2 KI (aq) + 2 H2SO4 (aq) + MnO2 (s) → MnSO4 (aq) + K2SO4 (aq) + I2 (s) + 2 H2O (l)

The reaction here is the formation of iodine from MnO2 and KI in the presence of dropwise H2SO4.

Hypo is the common name of sodium thio-sulphate or sodium hypo-sulfite.

The equation of the titration reaction is;

2Na2S2O3 + I2→ Na2S4O6 + 2NaI

When this reaction takes place, iodine is decolorized due to its reduction to I^-.

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Answer:

alpha decay

Explanation:

an unstable element is radioactive in nature.

Polonium is a chemical element with a large, unstable nucleus.

the most stable isotope of Polonium is Polonium-209, which typically undergoes an alpha decay to form lead-205 and the emission of an alpha particle.

1. Polonium has a large, unstable nucleus. Through which process is it most likely to become stable?

alpha decay

2. Which type of energy does alpha decay generate?

kinetic

3. Use the equation to answer the question.

14 6C→14 7N+ 0−1e

Which type of radioactive decay does the equation model?

beta-minus decay

4. How does the nucleus change in beta-plus decay?

The mass number remains the same, and the atomic number decreases by one

5. An unstable nucleus undergoes gamma decay. How does the nucleus change?

It becomes more stable by repositioning its particles

Explanation: I did the test

Resistance exercise can impact nitrogen balance by promoting an increase in muscle protein synthesis and reducing muscle protein breakdown. This results in a positive nitrogen balance, indicating that the body is retaining more nitrogen than it is excreting.

Resistance exercise stimulates muscle protein synthesis, which is the process of creating new proteins in muscle cells. This increase in protein synthesis requires a positive nitrogen balance, as proteins are composed of amino acids, and nitrogen is an essential component of amino acids. During resistance exercise, the body adapts to the increased demand by enhancing the rate of muscle protein synthesis.

Additionally, resistance exercise also reduces muscle protein breakdown. By engaging in resistance training, the body signals a need to preserve muscle tissue, leading to a decrease in muscle protein breakdown.

The combination of increased muscle protein synthesis and reduced protein breakdown results in a positive nitrogen balance, indicating that the body is retaining more nitrogen than it is losing. This is important for muscle growth and adaptation to resistance training.

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Plants use carbon to build leaves and stems, which are then digested and used for cellular growth by animals. Carbon is stored in the atmosphere as gases such as carbon dioxide. It is also stored in the oceans, where it is captured by a variety of marine organisms.

A heterotroph is an organism that, unlike an autotroph, cannot fix carbon and instead grows on organic carbon.

Carbon dioxide is pulled from the air by photosynthesis to produce carbon-based food for plant growth. Carbon is transferred from plants to animals.

Carbon from plants moves through food chains to the animals that eat them. Animals that eat other animals absorb carbon from their food as well.

Thus, Organic molecules produced by photosynthesizes are consumed by food chains, and cellular respiration converts the organic carbon back into carbon dioxide gas.

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Answer:

D hydrogen bonding

Explanation:

250 grams of Mix A (MxA) should be used to obtain the right diet for one animal.

To determine the number of grams of Mix A (MxA) needed to obtain the right diet for one animal, let's assume that x represents the number of grams of MxA used.

The protein content in MxA is 10%, which means 0.10x grams of protein will be obtained from MxA.

The fat content in MxA is 6%, which means 0.06x grams of fat will be obtained from MxA.

Since the desired diet for one animal should consist of 25 grams of protein and 5 grams of fat, we can set up the following equation based on the protein content:

0.10x = 25

Solving for x:

x = 25 / 0.10

x = 250 grams.

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