Can somebody plz help and these t or f questions correctly (only if u really know the correct ones) thx sm! :3

WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST :DDDD

Cooks should use sea salt in recipes instead of regular table salt.

Answer:

2.5

Explanation:

Answer: monomers

Explanation: Most macromolecules are made from single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.

The type of organic molecule that is hydrophobic is Lipids, including fats, oils, waxes, phospholipids, and steroids. A famous example is a triglyceride, which contains hydrophobic fatty acids.

The type of organic molecule that is hydrophobic or 'water-fearing' is Lipids. Lipids include fats, oils, waxes, phospholipids, and steroids. Being hydrophobic, they repel water and tend to associate with other lipids in a water environment. A classic example of a lipid molecule is a triglyceride, which consists of three fatty acids attached to a glycerol backbone. The fatty acids are the hydrophobic part of the molecule, which is why fats and oils do not mix with water.

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Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 47 g

volume = 75 mL

The density is

\(density = \frac{47}{75} \\ = 0.626666666...\)

We have the final answer as

Hope this helps you

Answer:

because the two are opposite compounds.

Explanation:

When Chlorine is passed through aqueous sodium fluorine then no reaction takes place between these two because of reactivity order of Fluorine and Chlorine

Displacement reaction is a reaction in which one atom replaces other atom from a molecule on the basis of reactivity strength.

The reason for such reactivity is that as we go down the group the number of shells increases so outermost shell is very far away from the nucleus. If any atom from outside coming to this nucleus then this nucleus is unable to attract the electron of that that atom. Reactivity of halogens is directly proportional to the electronegativity power of that element, that is power to attract electron. Reactivity of halogens decreases down the group.

So Chlorine is less reactive than Fluorine so Chlorine can not replace Fluorine from sodium fluoride. Hence no reaction will take place.

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Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

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Answer:wont

Explanation:

The change in specific entropy between state 1 and state 2 is 1.029 kJ/kg.K and 0.835 kJ/kg.K for without internal irreversibilities and with internal irreversibilities, respectively

Given information:

State 1,

T1 =300 K, pl = 100kPaState 2, T2 =500 K, p2 =650kPaTo determine:

The change in specific entropy between these states, in kJ/kg.

Solution:

(a) Without internal irreversibilities:

Using the ideal gas model for air, we know that specific entropy is given by

= C_p ln(T/T_0) - R ln(p/p_0)

Here, R = 287 J/kg.

K (Gas constant for air)C_p is the specific heat at constant pressure.

C_p for air at room temperature can be taken as 1.005 kJ/kg.

So, the change in specific entropy can be given asΔs = s2 - s1 = C_p ln(T2/T1) - R ln(p2/p1)Δs = 1.005 ln(500/300) - 287 ln(650/100) = 1.029 kJ/kg.K

(b) With internal irreversibilities:

Here, we cannot assume constant cp value, so we need to use the following formula:Δs = ∫(dq/T)where dq is the heat transfer taking place during the process.

Now, we know that for any process,

Δs = s2 - s1 = q/T

So, we need to determine the amount of heat transfer taking place during the process.

In general, we can write:

dU = dq - dw

where dU is the change in internal energy, dq is the heat transfer taking place and dw is the work done during the process.

For a piston-cylinder arrangement, the work done will be given by

dw = pdv

Also, for an ideal gas, the change in internal energy can be given as

dU = C_v dTwhere C_v is the specific heat at constant volume.

Substituting these equations in dU = dq - dw, we get

dq = C_v dT + pdv

For air, C_v = 0.718 kJ/kg.

We need to integrate dq/T to get the change in specific entropy. We can write,dq/T = C_v/T dT + p/T dv

Let's evaluate these terms separately:

∫C_v/T dT = C_v ln(T2/T1)∫p/T dv = R ln(p2/p1)

So, the change in specific entropy can be given as

Δs = C_v ln(T2/T1) + R ln(p2/p1)Δs = 0.718 ln(500/300) + 287 ln(650/100)Δs = 0.835 kJ/kg.

Therefore, the change in specific entropy between state 1 and state 2 is 1.029 kJ/kg.K and 0.835 kJ/kg.

for without internal irreversibilities and with internal irreversibilities, respectively.

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Answer:Is sugar water a mixture or a compound? Define mixtures and compounds, and explain how without tasting it, Nicole can test to make sure she is using the sugar water in the glaze. The sugar-water is a mixture because it is chemically bonded, not chemically combined. A mixture is something that has 2 substances or more. hope this helps

Explanation:

The correct order of the increasing polarity of the analyte functional group isEthers < Esters.

The given statement is "Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters."  The order of polarities of functional groups is the order of their increasing polarity (i.e., less polar to more polar) based on their electron-donating or withdrawing ability from the rest of the molecule.Polarity of analyte: The analyte's polarity is directly proportional to the dipole moment of the functional group, which is associated with a difference in electronegativity between the atoms that make up the functional group.The electronegativity of an element is its ability to attract electrons towards itself. The greater the difference in electronegativity between two atoms, the more polar their bond, and hence the greater the polarity of the molecule.

To find the correct order of the increasing polarity of the analyte functional group, let's first compare the two groups: hydrocarbon ethers and esters. Here, esters have a carbonyl group while ethers have an oxygen atom with two alkyl or aryl groups. The carbonyl group has more electronegative oxygen, which pulls electrons away from the carbon atom, resulting in a polar molecule. On the other hand, ethers have a less polar oxygen atom with two alkyl or aryl groups, making them less polar than esters. Therefore, the correct order of the increasing polarity of the analyte functional group isEthers < Esters.

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Answer:

The correct answer is a transition metal.

Explanation:

Hope it helps.

Comments:

All the given elements are representative elements as they have valence electrons present in p -orbital except option a which has valence electron d-orbital and hence is not a representative element.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

Thus, all the given elements are representative elements as they have valence electrons present in p -orbital except option a which has valence electron d-orbital and hence is not a representative element.

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Answer:

Ok! I have four tips!

Explanation:

Create A Time Table.

Gather Information For Your Online Assignments Beforehand.

Make Notes As You Read The Course Materials.

Start Doing Your Online Assignment In Advance.

The temperature of the food or beverage during consumption affects the volatiles.

The flavor of food or beverages is influenced by the presence of volatile compounds, which are responsible for the aroma and taste. These volatile compounds are released from the food or beverage and interact with our olfactory receptors, contributing to the overall sensory experience. Temperature plays a crucial role in this process.

When food or beverages are heated, the temperature increase leads to an increase in the volatility of certain compounds. Higher temperatures can cause the evaporation of volatile compounds, releasing them into the air and enhancing the aroma and flavor perception. For example, heating coffee can intensify its aroma due to the increased release of volatile coffee compounds.

On the other hand, cold temperatures can also affect flavor perception. Lower temperatures can decrease the volatility of certain compounds, leading to reduced aroma and flavor intensity. This is why some foods or beverages may taste less flavorful when consumed cold compared to when they are warm.

In summary, the temperature of the food or beverage during consumption affects the volatility of compounds, which in turn impacts the flavor perception. Controlling the temperature can play a significant role in enhancing or diminishing the sensory experience of the food or beverage.

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Answer:

he substance with more intermolecular attraction will be having higher melting point. So higher the melting point,higher the force of attraction will be

Explanation:

Melting point is the minimum temperature at which a substancr start to melt.As melting happens the particles force of attraction will be lowering.Substance which have higher force of attraction,

It will take a little time to reach the melting point because the particles does not move due to its force of attraction. When required heat energy is supplied it starts to melt..

Hope this helps....

The gland that can be precisely controlled, and its amount of secretion and the area of the body involved can be varied independently is the **sweat gland**.

Sweat glands are distributed all over the body and are controlled by the autonomic nervous system. The amount of sweat secreted and the area of the body involved can be regulated by the sympathetic nervous system, which is responsible for the "fight or flight" response. This means that the body can vary the amount of sweat produced in different areas of the body depending on the situation, such as in response to exercise or heat. The secretion of sweat is also under hormonal control, with hormones such as adrenaline and cortisol increasing sweat production. Overall, sweat glands play an important role in regulating body temperature and maintaining homeostasis.

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239.8 g so 240g

Explanation:

plz let me know if this is right than I can tell u how I did it :)

The elements have similar properties to beryllium are magnesium and aluminium.

The term an element is defined as a pure substance that cannot be broken down by any physical or chemical means into simpler substances.

An element is made up of the same kind of atoms. Elements are classified into metals, nonmetals, and metalloids.

Atoms are made up of protons, neutrons, and electrons. Two unusual kinds of atoms can mix to produce a compound.

Magnesium, calcium, strontium, barium, radon are all chemically same to beryllium. Elements in the similar group have the same chemical properties because they have the equal number of valence electrons.

Thus, The two elements with properties most like beryllium are magnesium and aluminium.

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Answer:

Explanation:

Water is a liquid at room temperature due to its relatively low vapor pressure and high thermal stability.

Water molecules have a combination of hydrogen bonds and dipole-dipole interactions, which result in a moderate level of intermolecular attractive forces. These attractive forces allow water to remain in a liquid state at room temperature, as the energy required to overcome these forces and convert water into a gas (vaporization) is relatively high.

Additionally, water has a high heat capacity, which means that it can absorb a lot of heat energy without undergoing significant temperature changes. This high heat capacity allows water to maintain a stable liquid state over a wide range of temperatures.

Overall, the combination of moderate intermolecular forces and high thermal stability is what makes water a liquid at room temperature.

Answer:

All you have to do here is use the ideal gas law equation, which looks like this

P

V

=

n

R

T

−−−−−−−−−−

Here

P

is the pressure of the gas

V

is the volume it occupies

n

is the number of moles of gas present in the sample

R

is the universal gas constant, equal to

0.0821

atm L

mol K

T

is the absolute temperature of the gas

Rearrange the equation to solve for

T

P

V

=

n

R

T

⇒

T

=

P

V

n

R

Before plugging in your values, make sure that the units given to you match those used in the expression of the universal gas constant.

In this case, the volume is given in liters and the pressure in atmospheres, so you're good to go.

Plug in your values to find

T

=

3.10

atm

⋅

64.51

L

9.69

moles

⋅

0.0821

atm

⋅

L

mol

⋅

K

T

=

251 K

−−−−−−−−−

The answer is rounded to three sig figs

Explanation:

hope it helps

Answer:

a drought !

- little to no water causes it

- it causes for organisms to die and organisms need water !

Answer: False

Explanation: Gaining an electron which has a negative charge results in an overall negative charge, thus making this an anion, and the answer, false.

Answer:false

Explanation:it becomes a anion

According the question the Percent yield is 11.99%

Yield is an economic term referring to the income generated by an investment over a period of time. It is usually expressed as a percentage of the initial investment and is calculated by taking the total income earned and dividing it by the initial investment. Yield is an important measure of the performance of an investment, and is a key factor in determining the attractiveness of an investment. Yields can be calculated for individual investments, or for portfolios of investments. Yields can also be calculated for different types of investments, such as stocks, bonds, and mutual funds. Yields are also used to compare investments with different levels of risk, so investors can make informed decisions about their investments. Yields are affected by a variety of factors, including interest rates, inflation, and market conditions.

The percent yield can be calculated using the formula:

Percent yield = (Actual yield / Theoretical yield) * 100

For Magnesium Chloride, the theoretical yield is 14.87 moles, and the actual yield is 1.78 moles.

Therefore, the percent yield is:

Percent yield = (1.78 / 14.87) * 100 = 11.99%

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The molecular formula C7H12, there are three  straight-chains alkynes isomers

The term isomers refers to compounds that have the same molecular formula but different structural formulas. This implies that the orientation of the molecules in space tend to differ.

We know that alkynes are those compounds that contain a triple bond. This triple bond could occur at any point in the molecule. Sometimes, the isomerism may result from the position of the triple bond on the compound.

Now for the compound that has the molecular formula C7H12, there are three  straight-chains alkynes isomers as we can see in the image attached to this answer.

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Answer:

We don’t have the enzymes necessary to remove nitrogen from the atmosphere; we get our nitrogen from the food we eat. ^^

Although almost 80% of the atmosphere is made up of nitrogen gas, most living things don't have the enzymes necessary to use nitrogen directly from the atmosphere. We obtain the nitrogen we need to make proteins and DNA, if we can't obtain it from breathing we can get it by eating organic plants and animals.

Nitrogen is a key element in the nucleic acids DNA and RNA, which are the most important of all biological molecules and crucial for all living things. DNA carries the genetic information, which means the instructions for how to make up a life form.

It is used to make amino acids in our body which in turn make proteins. The human body comprises 3% nitrogen (by mass). It is an essential part of amino acids (makeup proteins), nucleic acids (DNA, RNA), ATP (energy molecule), etc. It is nearly impossible to live without nitrogen.

Therefore, Although almost 80% of the atmosphere is made up of nitrogen gas, most living things don't have the enzymes necessary to use nitrogen directly from the atmosphere. We obtain the nitrogen we need to make proteins and DNA, if we can't obtain it from breathing we can get it by eating organic plants and animals.

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Explanation:

a process for separating minerals from gangue by taking advantage of the differences in their hydrophobicity.

I believe that is accurate

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1 mol Na2SO4 = 142.04 g

3.35 mol Na2SO4 x 142.04 g / 1 mol = 478.04 g Na2SO4

1 mol NaOH = 40 g

478.04 g Na2SO4 x (2 mol NaOH / 1 mol Na2SO4) x (40 g NaOH / 1 mol NaOH) = 16.87 g NaOH

What is mol?

Mol (mole) is a unit of measurement used to quantify the amount of a substance. It is the amount of a substance that contains the same number of elementary particles as there are atoms in 12 grams of carbon-12. The elementary particles may be atoms, molecules, ions, electrons, or other particles, depending on the type of substance. A mol of a substance contains Avogadro's number of particles. The mol is the base unit of amount of substance in the International System of Units (SI), and its symbol is "mol."

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Answer:

particle size

Explanation:

because except that all are the examples that the speed of dissolving can be changed

Answer:

Adding water

Explanation:

When a solid is dissolving the speed cannot be changed by adding water

Answer: B. a molecule

Explanation: When atoms join together with a covalent bond, they form a molecule. In a covalent bond, atoms share electrons to achieve a stable configuration, which allows them to form a stable molecule.

Answer:B. A molecule. I hope this helps you

Explanation:

The correct answer is B - a molecule. When atoms join together with a covalent bond, they are sharing electrons with each other to form a stable molecular structure. This can happen between two or more non-metal atoms, and the resulting compound will have a neutral charge. Unlike an ion, which has a charge due to a gain or loss of electrons, a molecule is stable and does not possess an overall charge. Additionally, the bond formed between two atoms is strong and requires energy to break. This is different from a noble gas, which refers to an element that has a full outer shell and therefore does not easily form bonds with other elements.

Apply to a gas molecule's kinetic energy is not the same as telling you the speed, so calling a thermometer a speedometer for atoms is deceptive.

Uniformly, if a sample of water is put down in the freezer, its molecules begin to move slower (with a lower speed) and this is thought the back by a lower thermometer reading. It is in this feeling that a thermometer can be thought of as a speedometer. As John Rennie broaches in the comments, thermometers work for solids, liquids, and gasses, whereas the temperature is comparable to the average. A thermometer would be an average speedometer for the primary molecules of a substance or structure, not specifically separate atoms.

So we can conclude that thermometers compute the average velocity of atoms in a given material or order volume.

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