Provide two functions of the sweat gland pore.

According to the given statement these two changes have in common in Both are only chemical changes.

The correct option is C.

Chemical changes happen when bonds among atoms or molecules are formed, broken, or both. This suggests that a substance is transformed from one with a particular set of characteristics (such melting point, color, flavor, etc.) into one with a different set of characteristics.

The majority of our energy is produced by chemical reactions. Many different types of materials are tested, identified, and analyzed using chemical reactions (such as pool testing kits and forensic tests from TV shows like "CSI").

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Plasma state of matter is mostly represented in the image

A state of matter is a way to describe the behavior of atoms and molecules in a substance and there are three common states of matter which is solids means relatively rigid, definite volume and shape and they vibrate in place but don't move around and plasma is the the when at the very temperature of stars atom loses their electron and the mixture of electron and nuclei that result` in plasma state of matter

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By ideal gas approximation, the volume change is 230.2 liters.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that

n₁ = 1 mol

n₂ = 1 + 9 mol = 10 mol

P₁ = P₂ = 100 kPa = 100000 Pa

T₁ = 74⁰ C = 347 K

Find the initial volume

P₁ . V₁ = n₁ . R . T₁

100000 . V₁ = 1 . 8.31 . 347

V₁ = 0.0288 m³

When the initial and final temperature and pressure are the same, we can use the ratio of the number of moles and volume as

V₁ / n₁ = V₂ / n₂

0.0288 / 1 = V₂ / 9

V₂ = 0.25952 m³

V₂ = 259.52 liters

The volume change is

ΔV = V₂ - V₁

ΔV = 259.52 - 28.8

ΔV = 230.2 liters

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The information needed to construct a geomagnetic time scale is the age of rocks along the surface earth and  the magnetic direction of rocks along the surface of earth. Thus option C and D is correct.

Geomagnetic time scale is defined as a chronicle of the commencement and duration of the numerous events of magnetic polarity reversal on Earth.

Geologists can give absolute ages to the records of these paleomagnetic anomalies, which are the reversals, to build a geomagnetic time scale. The rock is radiometrically dated, and each stage of reversal is assigned an absolute geologic age.

Thus, the information needed to construct a geomagnetic time scale is the age of rocks along the surface earth and  the magnetic direction of rocks along the surface of earth. Thus option C and D is correct.

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Answer:

 -the age of rocks along the surface earth

- the magnetic direction of rocks along the surface of earth

Explanation:

let me know if that works!

Answer: The substances that are insoluble in water and do not conduct electricity are made up of nonmetal atoms.

Explanation:

According to the theory, cancer drugs delivered by nanoparticles could function as biological missiles that attack tumors with the least possible harm to healthy organs.

Nanomaterials are made up of organic or semiconducting particles, non-metal atoms, and metal atoms. "Nanomedicine" refers to the capacity of nanotechnology to influence medicine. Doctors will be able to diagnose and treat patients suffering from a variety of illnesses using nanomedicine.

There is growing hope that the use of nanotechnology in dentistry and medicine will result in significant improvements in disease detection, therapy, and prevention. A brand-new discipline called nanomedicine is emerging as a result of escalating interest in the potential medical uses of nanotechnology.

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Answer: The amount of heat needed to raise a substance's temperature by one Kelvin per kilogram. The heat needed to raise the temperature of a given substance with known mass can be calculated as follows:

                                      ΔH=mCΔT

ΔH=Amount of heat energy supplied

m=Mass of the substance = 15 g

ΔT=Change in temperature = Tfinal−Tinitial = 250° C - 275.0°C = -25°C

C=Specific heat capacity = 2.02 J/g °C

               ΔH=mCΔT

after putting the given values,

                ΔH= -757.5 J

The formula also shows that heat energy is released (negative value) when the change in temperature is negative, i.e., when the temperature of a substance falls.

Answer:

118.71 u

Explanation:

Tin. Tin is a chemical element with the symbol Sn (for Latin: stannum) and atomic number 50. It is a main-group metal in group 14 of the periodic table.

Source: https://en.m.wikipedia.org/wiki/Period_5_element#:~:text=Tin,-Main%20article%3A%20Tin&text=Tin%20is%20a%20chemical%20element,14%20of%20the%20periodic%20table.

The dipole moment of the hydrogen bromide HBr molecule is equal to 6.77 D. Therefore, option (C) is correct.

A dipole moment can be determined from the product of the magnitude of the charge and the distance between charges and is represented by the Greek letter ‘µ’.

The bond dipole moment arises between two atoms of different electronegativities in a chemical bond.

μ = q × d

Where: μ is the bond dipole moment, q is the magnitude of the partial charges, and d is the distance between them.

Given, the bond Length of HBr = 1.41 A° = 1.41 × 10⁻¹⁰ m.

The charge on H and Br atoms =  1.6 × 10 ⁻⁹ C

Therefore,

Dipole Moment of HBr =  Distance × Charge

Dipole Moment =  1.41 × 10⁻¹⁰ ×  1.6 × 10 ⁻¹⁹

Dipole Moment = 2.25882 × 10⁻²⁹ C.m  

The conversion factor of one-coulomb meter is equal to 2.9989  ×10⁻²⁹ Debye

Therefore,

Dipole Moment = 2.25882  ×10⁻²⁹ × 2.9989  ×10²⁹

Dipole Moment of the HBr = 6.77 Debye.

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Answer:

Not sure why the 3s are on the top, unless they are charges.

But the answer is: 2HNO3 + CaCO3 → Ca(NO3)2 + H2O + CO2

Explanation:

Answer:

There's an experiment that you can try to see if carbon dixide is heavier than air.

Explanation:

At room temperature, carbon dioxide has higher density (ρ = 1.98 kg·m -3) than air (ρ = 1.29 kg·m -3). The density of gas, however, significantly depends on its temperature. Carbon dioxide produced by burning has higher temperature than the surrounding air.

Why is CO2 heavier than the air?

Short answer is CO2 is heavier than ambient air, but it does not drift to the ground as there is a lot of mixing going on in ambient air. ... Carbon dioxide, also known by the chemical formula CO2, has a higher density than the other gases found in air, which makes CO2 heavier than the air.

[tex]\quad \huge \quad \quad \boxed{ \tt \:Answer }[/tex]

[tex]\qquad \tt \rightarrow \:{4.88 × 10}{-15} \:\: joules [/tex]

____________________________________

[tex] \large \tt Solution \: : [/tex]

By using Plank's equation ;

[tex]\qquad \tt \rightarrow \: E = \dfrac{hc}{ \lambda} [/tex]

[tex]\qquad \tt \rightarrow \: E = \dfrac{6.6 \times 10 {}^{ - 34} \sdot3 \times 10 {}^{8} }{ 4.06 \times 10 {}^{ - 11} } [/tex]

[tex]\qquad \tt \rightarrow \: E = \dfrac{19.8}{4.06} \times (10 {}^{ - 26} \times 10 {}^{ 11 } )[/tex]

[tex]\qquad \tt \rightarrow \: E = 4.88 \times 10 {}^{ - 15} \: \: \: joules[/tex]

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

Ethane gas, C2H6(g), has a combustion enthalpy of roughly -1.5*103 kJ/mol.

Compared to pure methane, gaseous blends with ethane as a component have higher thermal efficiency and shorter combustion times.

This can be accomplished by calculating the difference between the mass of the fuel before and after the water has heated. Calculate how much energy is released by one mole of the material. By dividing by 1000, you may obtain the answer in KJ. This gives you the J/mol-1.

The amount of H in a reaction is determined by the physical states of the reactants and products (gas, liquid,).

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The heat required to vaporize this sample at standard pressure is 113,270 J.

We can calculate the amount of heat (Q) needed to vaporize 50.0 grams of water by using water's heat of vaporization (q) at 100 °C (boiling point of water) - 40.8 kJ/mol, and the number of moles of water (n).

Q = n * q

The heat of vaporization describes the amount of energy needed to be introduced to a single mol of water at 100 °C to break the intermolecular interactions between molecules of water so it changes to a gaseous state.

To calculate the number of moles of water, we are going to use the mass of water (m = 50.0 g) and its molar mass (M = 18.01 g/mol):

n = m/M

n = 50.0 g / 18.01 g/mol

n = 2.7762 mol

Now we can calculate the amount of heat needed:

Q = 2.7762 mol * 40.9 kJ/mol

Q = 113.27 kJ

Q = 113,270 J

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Answer:

Prior to sunrise

Answer: Based on the stoichiometry 1 mole of carbon disulfide will produce 1 mole of carbon dioxide. Similarly we can apply the volume ratio, so 1.1L of carbon disulfide will produce 1.1L of carbon dioxide.

      An ion is an atom or collection of atoms where the number of electrons and the number of protons are different. A positive ion, also known as a cation, is a particle that exists when the number of electrons exceeds the number of protons.

      Because they have an equal number of protons and electrons, atoms are neutral particles. Ions are electrically charged particles that can be created by either taking electrons away from neutral atoms to form positive ions or adding electrons to neutral atoms to produce negative ions.

    Depending on whether the number of electrons in an atom is greater or less than the number of protons in the atom, an atom can develop a positive charge or a negative charge. An atom is referred to as an ION when it is drawn to another atom due to an imbalance in its electron and proton numbers.

    Any element that has a variable ratio of protons to electrons, producing either a positively or negatively charged atom, is said to contain an ion. It is relatively easy to determine whether an element is an ion.

       To become a noble gas configuration, elements create ions in order to become more stable. They lose or gain electrons to create ions, which results in a fully filled outer shell configuration and subsequently stability.

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a. The number of moles = 0.154 moles and number of ions =2.78x10²³ ions.

b. The number of moles= 2.18x10⁻⁴ moles and number of ions = 6.56x10²⁰ ions.

c.  The number of moles= 0.0147 moles and number of ions = 1.77x10²² ions .

Calculation of the no of moles and no of ions:

A. Moles MgCl₂:

According to question

88mL = 0.088L * (1.75mol / L) = 0.154 moles MgCl₂

By using (Avogadro's number:)

So,

0.154mol  *(6.022x10²³ molecules / 1 mol) = 9.27x10²² molecules.

Since 1 molecule of MgCl₂ contains 3 ions:

So,

Ions = 2.78x10²³

B. Moles Al₂(SO₄)₃:

( Aluminum sulfate , molar mass = 324.15g/mol:)

So,

0.321L * (0.22g Al₂(SO₄)₃ / L) * (1mol / 324.15g) = 2.18x10⁻⁴ moles.

Now,

1 molecule contains 5 ions:

So,

2.18x10⁻⁴ moles  *(6.022x10²³ molecules / 1 mol) * 5 = 6.56x10²⁰ ions.

C. Since

8.83x10²¹ formula units of CsNO₃ = Number of molecules. Ions are:

So,

8.83x10²¹ * 2 = 1.77x10²² ions

And moles are:

8.83x10²¹ Formula units * (1mol /  6.022x10²³) = 0.0147 moles

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Two isotopes of the FAKE element Sz, Average mass of  Seabreezium is equal to 199.77625 amu.

Given that Two isotopes of of Sz is given as :

Seabreezium-71 75%

Seabreezium - 76 25%

Now,

Isotopes of Seabreezium is given as:

Now,

 1st isotope = 71 75% of 271

                    = 194.44amu

  2nd isotope = 76 25% of 269

                       = 205.11 amu

Now,

Average Mass of Seabreezium = 205.11 + 194.44/2

 Average Mass of Seabreezium = 199.77625 amu

Thus, from the above conclusion we can say that, Average mass of  Seabreezium is equal to 199.77625 amu.

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Empirical formula of the compound of bromine and fluorine is used to make UF₆ is Brf₃.

The compound contains 58.37% of Bromine.

For simplicity, let us assume that the mass of the compound made up of bromine and Fluorine is 100g.

Now the contents of Bromine and fluorine in the compound are 58.37g and 41.63g.

To find the empirical formula of the compound. we have to follow the certain set of rules.

Step1. Calculating the number of moles of each and every element present in the compound.

Mole = Given mass/molar mass

mole of Br = 58.37/79.9

moles of Br = 0.73 moles.

and

moles of F = 41.63/19

mole of F = 2.19 moles.

Step2. Calculating the molar ratios of each and every compound.

molar ratio is calculated by dividing the moles of all element with moles of element with least moles

Molar ratio of Br = 0.73/0.73 = 1

Molar ratio of F = 2.19/0.73 = 3

Step3. Making the molar Ratio itself the number of atom of that element in the compound.

Here, 1 atom of Br and 3 atoms of F.

So, the empirical formula is BrF₃.

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Here hydroboration-oxidation, as well as oxymercuration-reduction, gives the same compound 1-cyclo pentanol.

A compound in linguistics is a lexeme (more precisely, a word or sign) composed of more than one stem. The process of word construction that results in compound lexemes is known as compounding, composition, or nominal composition.  An open compound or a spaced compound is one that uses a space rather than a hyphen or concatenation; the alternative is a closed compound.

The compound's meaning may be comparable to or distinct from the meanings of its constituents in isolation. With very few exceptions, the first component stem in English compound words is emphasized.

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Ferrous fumarate: medicine to treat iron deficiency anaemia - NHS.

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Following are the answers related to traits of genes.

Gene pool as a whole is characterized by the term "genotype," which roughly refers to an organism's genetic make-up. The term can also be used in a more precise sense to refer to the several alleles, or variations of a gene, that an organism possesses.

A person can be recognized by their phenotypes, which include things like height, eye color, and blood type. A person's phenotype is influenced by both their genotype (genotype) and environment.

refers to a trait that develops more frequently than another trait due to interactions between gene alleles.

a trait that is only present in homozygous genotypes; a trait that is frequently concealed by other inherited characteristics but persists in a population of heterozygous genotypes.

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The correct (R) or (S) designations for stereocenter carbons are as follows: (S) is the organic substrate, and (P) is the organic product (R).

The substrate is designated as S the reaction's result as R. As a result. The SN2 reaction's mechanism can be summed up as follows: This nucleophilic substitution process only requires one step.

Due to the involvement of two reactants in the step that determines the rate, the reaction is referred to as the SN2 reaction.

The electrophile is attacked by the nucleophile in the reaction's mechanism, causing a transition phase in which the electrophile's alkyl group leaves and the nucleophile forms a new bond with the substrate that is still present.

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No, it cannot be held under the controlled experiment example. This is because the dependent variable is where we test the poison and the independent variable is the choice of valid poison.

Also, according to the definition of a controlled experiment all experiments are controlled experiments when factors other than the independent variables are held constant. But as you can see here the dependent variable is different.

Also, in this experiment, one drug was placed on the kitchen counter and another was placed on the doorstep. Kitchen counters can attract more odors from food/sweets than front doors so it's clear that both toxins aren't given an equal chance. And this may result in more ants getting trapped and dying from the poison on your kitchen counter, and fewer ants on your front door regardless of effectiveness.

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Answer:

Your answer is C. Gas

Explanation:

Particles in a solid stay still and are compacted

Particles in a liquid move around more than they do when they are frozen

Particles in a gas bounce around more freely than both liquids and solids because they are being forced to be compacted in one area or shape

Hope this helps! Good Luck! 0w0

Answer: C, gas

the only one that would make sense

Answer:

It's 0.2556054185018347 moles