Systemic lupus erythematosus, or lupus, affects a few million people in the United States.
Most of these people are young women. Lupus is a chronic, autoimmune disease that
affects connective tissue in any part of the body. An attack can damage organs and the
nervous system. What conclusion can be drawn about lupus?
A. Most victims of lupus are middle-aged women.
B. Hormones most likely are unrelated to the lupus disease.
C. Lupus is easy for a physician to diagnose.
D. Lupus can affect almost every system of the body.
E. It is uncommon to have skin problems with lupus.

Answer:

Both chemical and nuclear reactions involve changes in the arrangement of atoms or subatomic particles.

Both chemical and nuclear reactions result in the release or absorption of energy.

Chemical and nuclear reactions are both types of reactions that involve a change in the composition of matter. Here are two things that they have in common/share:

1. Conservation of mass: Both chemical and nuclear reactions follow the law of conservation of mass. This means that the total mass of the reactants is equal to the total mass of the products. In other words, mass cannot be created or destroyed during a chemical or nuclear reaction.

2. Energy changes: Both chemical and nuclear reactions involve a release or absorption of energy. Chemical reactions typically involve the breaking and forming of chemical bonds, which releases or absorbs energy. Nuclear reactions involve the splitting or combining of atomic nuclei, which releases or absorbs much larger amounts of energy. In both cases, the energy change can be measured and analyzed.

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When a gas is heated in a flexible container with constant pressure, the statement "The gas particles travel quicker" is accurate.

option (C)

The container's walls are struck more forcefully by the gas particles inside the container.

(a) Gas molecules lack a fixed form and a fixed volume. They grow till they fill their container. Gas molecules move readily both inside and outside of the container because they are fluid. Unless compressed, gas molecules are not very dense.

(b) Gas molecules mix and disperse as they diffuse and effuse (travel through small holes).

(c) The container's walls are struck more forcefully by the gas particles inside the container. The gas container's capacity expands as a result of the impact.

The gas container's capacity expands as a result of the impact. Gas molecule characteristics

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The complete  question follows

x consists of a flexible container with eight particles of a gas as shown. what happens to the pressure of the system when x is converted to the representations in (a), (b), and (c)?

(a) pressure increased

(b) pressure decreased

(c) pressure is constant

The ionic compound that occurs between each pair of elements has the following formula:

The formula of the ionic compound of each pair is:

(a)Aluminum and Sulfur:

Aluminum sulfide, commonly known as [tex]Al_{2} S_3}[/tex], is created when aluminum and sulfur are combined. Its molar mass is 150.158 g/mol. Al has an oxidation state of +3, while the sulfur in [tex]Al_{2} S_{3}[/tex]is in a -2 oxidation state.

[tex]Al_2} S_{3}[/tex] = [tex]Al^{+3}[/tex] + [tex]S^{-2}[/tex]

(b) Aluminum and Nitrogen:

Solid aluminum nitride is known as aluminum nitride (AlN). It's an electrical insulator with a high thermal conductivity of up to 321 W/. (mK).

AlN = [tex]Al^{+3}[/tex] + [tex]N^{+3}[/tex]

(c) Potassium and oxygen

When potassium and oxygen combine, a substance known as potassium oxide is created. The chemical name for it is [tex]K_{2} O[/tex]. Due to its high level of reactivity, potassium is never found in its free form. It is straightforward for it to react with oxygen atoms to produce [tex]K_{2} O[/tex]because of its +1 valency.

( K₂ )⁺¹ + O²⁻ → K₂O

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The complete question follows

Write a formula for the ionic compound that forms between each pair of elements.

Answer:

4.956 g/gallon * 0.387 = 1.91 g of sulfuric acid in 1 gallon of battery acid.

Explanation:

To calculate the number of grams of sulfuric acid in 1 gallon of battery acid, we can use the density of the solution and the percentage of sulfuric acid by mass.

First, we need to convert the density from g/ml to g/gallon. Since 1 gallon is equal to 3.785 L, we can multiply the density of 1.31 g/ml by 3.785 to get 4.956 g/gallon.

Next, we can use the percentage of sulfuric acid by mass to find the mass of sulfuric acid in the solution. To do this, we can multiply the mass of the solution by the percentage of sulfuric acid by mass, which is 0.387.

The compounds is the mass ratio of the chromium to the oxygen closest to 1.62 to 1.00 is CrO₃.

The Atomic mass of Cr = 52 g /mol

The Atomic mass of O  = 16 g/mol

The mass ratio of the chromium to the oxygen is given below as :

1) CrO₃ = 52 / 16 × 3 = 1.08

2) CrO₂ = 52 / 16 ×2 = 1.63

3) CrO = 52 / 16 = 3.25

4) Cr₂O = 52 × 2 / 16  = 6.5

5) Cr₂O₃ = 52 × 2 / 16 × 3 =  2.1

Thus the compound correct  mass ratio of chromium to oxygen closest to 1.62 to 1.00 is CrO₃.

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The correct statements that reflect the relationship between the volume and the external pressure of the gas at the constant temperature is a)  As pressure decreases, volume will increase. b) Pressure and volume are inversely proportional.

The ideal gas equation is given as :

P V = n R T

where,

P = pressure

V = volume

n = number of moles

R = gas constant

T = temperature

As the pressure will decreases, the volume will increase and the Pressure and the volume are inversely proportional to each other. The number of mole is the ratio between the mass divided by the molar mass.

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The step that determines rate is the one that moves most slowly in a series of non-elementary reactions.

Reaction of CO(g) with NO2(g)

CO(g) + NO2(g) ? NO(g) + CO2(g)

At low temperatures, the experimentally determined rate law expression is:

Rate = k [NO2]2

A two step reaction mechanism is suggested

Step 1 SLOW NO2(g) + NO2(g) ? NO3(g) + NO(g)

Step 2 FAST CO(g) + NO3(g) ? CO2(g) + NO2(g)

CO(g) + NO2(g) ? NO(g) + CO2(g)

The step that determines rate is the one that moves most slowly in a series of non-elementary reactions. The rate-determining step is the initial reaction since it happens slowly. We can get the rate law from this.

Additionally, because the specie is not present in the overall reaction equation, it can only be an intermediate that was created in step 1 and depleted in step 2.

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The characteristics of the two substances :

Substance A:

It has a higher boiling point.

It has  higher heat of vaporization

Substance B:

It has the weaker intermolecular forces.

It is a gas at 300 mmHg

1) The substance A has the vapor pressure of 275 mmHg . It has low vapor when compared to the substance B . It has the higher boiling point and has the higher heat of vaporization.

2) The substance B has the vapor pressure of the 459 mmHg and it has the weaker intermolecular forces when compared to the substance A and also it is a gas at 300 mmHg.    

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1.73/2 approximately 0.86 moles of acetic acid must be added. KOAc should be used at a ratio of 3/2, or 1.5 moles.

Effects on People Acetic acid is a potent irritant to the skin, upper respiratory tract, eyes, and mucous membranes when inhaled as vapor. Sodium acetate mixtures of 80% or over can be corrosive when in contact with skin or eyes, severely burning any exposed tissue.

Using the Henderson-Hasselbalch equation, determine the quantity of acetic acid (x) required to produce a pH-5.0 solution that contains

3MK+(3 M KOAc). The pK of acetic acid is 4.76 (Table 2-4).

[tex]$$\begin{aligned}\mathrm{pH} & =\mathrm{p} K+\log \frac{[\mathrm{KOAc}]}{[\mathrm{HOAc}]} \\5 & =4.76+\log \frac{3}{x} \\0.24 & =\log 3-\log x \\0.24-0.48 & =-\log x \\0.24 & =\log x \\x & =1.73 \mathrm{M}\end{aligned}$$[/tex]

Therefore, for a 500 mL solution, the amount of acetic acid added should be 1.73/2 or 0.86 moles. The amount of KOAc should be 3/2 or 1.5 moles.

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The opportunity cost for the new instruments for the music department is the 10% to upgrade the computer lab hardware

The revision of the budget is that the school board had to redistribute the budget allocation for upgrading the computer lab hardware from 5% to 10%. This means that the school board had to make a trade-off in terms of allocating more budget for upgrading the computer lab hardware and less for other areas such as new instruments for the music department or new sports equipment.

This trade-off is known as the opportunity cost, as the school board had to give up the potential benefits of allocating more budget to those areas in order to allocate more budget to upgrading the computer lab hardware.

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The Atomic Number, Mass Number, Number of protons, Number of neutrons, Number of electrons, Element, and Symbol is shown below:

The atomic number of an element is the number of protons present in the nucleus of the atom of the element.

The mass number is the sum of the protons and neutrons in the nucleus of the atom of the element.

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This substance may also be known as glycol. Each chemical's characteristics, potential physical, mental, and environmental health risks, as well as safety precautions, are all covered in the SDS.

Atoms of various elements are chemically mixed in compounds in a predetermined ratio. A pure chemical compound made of the same type of atom is referred to as an element. Composition. Different elements are found in compounds in a predetermined ratio, organized by chemical bonds in a predetermined way.

A substance that has been chemically linked by the joining of two or more distinct components. Saltwater (NaCl), which is derived from the components sodium and chloride, and water (H2O), which is created from the elements and oxygen, are two examples of compounds.

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Answer:

First layer of the atmosphere = Troposphere

Layer that contains the Ozone Layer = Stratosphere

The layer of the atmosphere that has the least molecules atmosphere that has the least molecules = Exosphere

Explanation:

The correct procedure for handling microorganisms is to wash your hands frequently to make preventive doings. For the safest reason, using Personal Protective Equipment is recommended.

What is Personal Protective Equipment?

Personal Protective Equipment (PPE) is equipment that must be used when working, according to the potential hazards and work risks on the job. This is used to maintain the safety of the workers themselves and those around them. Personal Protective Equipment must be in accordance with the type of work so that the safety and health of workers can be guaranteed.

Activities in the microbiology laboratory will always be closely related to the following things

The tool used in assisting the examination or identification of microorganisms can be in the form of a Bunsen which uses spirit, which has flammable properties. If the test tube is not used carefully, it can break and can injure the limbs.

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Answer:

Use aseptic techniques, Wash your hands frequently, and use disinfectants to clean lab surfaces.

Explanation:

Most probably the reaction 2 could be A: "( 2NO(g)+O2(g)→2NO2(g) )".

Reaction 2 is the second step of the overall reaction, which is the formation of NO2 from NO and O2. The overall reaction is (2O3(g)+2NO(g)→2NO2(g) + 2O2(g) ).

From the given options, the best match for reaction 2 is  (NO(g) + O2(g) → 2NO2(g) ) because it is a balanced equation that forms 2 moles of NO2 from 1 mole of O2 and 1 m0le of NO. This is consistent with the balanced equation of the overall reaction, which forms 2 moles of NO2.

Option A: 2NO(g) + O2(g) → 2NO2(g) forms 2 moles of NO2 but it consumes 2 moles of NO which is not consistent with the overall reaction.

Option B: 5NO(g) + O2(g) → 3NO2(g) forms 3 moles of NO2 but it consumes 5 moles of NO, again this is not consistent with the overall reaction.

Option C: NO(g)+O2(g)→2NO2(g),  it is a balanced equation that forms 2 moles of NO2 from 1 mole of O2 and 1 m0le of NO.

Therefore, based on the information provided, the correct option for reaction 2 is C: NO(g) + O2(g) → 2NO2(g)

"

Complete question

Reachtion 1  = (2O2(g)→3O2(g) ).

Reachtion 2  = ?

Overall recation = (2O3(g)+2NO(g)→2NO2(g) + 2O2(g) ).

the enthalpy of the overall reaction represented above can be determined by adding the enthalpies of reactions 1 and 2. which of the following could be reaction 2 ?

A: 2NO(g)+O2(g)→2NO2(g)

B: 5NO(g)+O2(g)→3NO2(g)

C:  NO(g)+O2(g)→2NO2(g)

D: None

"

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(Hint: Oxide is the result of combining Mn and O.) Mn (Mass of the element, in g) (assuming 100 g of compound) elements in moles The smallest moles or moles of an element Multiplier mathematical model O 1. 49.5 2. _50,5 3.

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Using unit conversion, One hour of yoga can result in 285 kilocalories burned (kcal) 1192440 j of energy were burned.

It involves changing a value stated in one unit of measurement into an equivalent value expressed in a different unit of measurement that is of the same kind.

The same attribute is expressed using a unit conversion, but in a different unit of measurement. For instance, time can be expressed in minutes rather than hours, and distance can be expressed in kilometers, feet, or any other measurement unit instead of miles.

We must convert the units using the provided data in order to solve this challenge.

information regarding the issue:

energy is equal to 285 kcal (kcal)

Energy measured in joules (j) equals.

A calorie (kcal) is equal to 4184 joules (j)

Kilocalories (kcal) are converted to joules (j), which gives us:

1 kcal = 285 kcal * 4184 j of energy.

1192440 j = energy

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The statement is true that rf values should be kept in the range of 0.2 to 0.8

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Each carbocation is capable of rearranging to a more stable carbocation. Limiting yourself to a single 1,2-shift, suggest a structure for the rearranged

What is carbocation?

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When a solution of NaCl (aq) and a solution of AgNO₃ (aq) are mixed, the net ionic equation is Na⁺ (aq) + Cl⁻ (aq) AgCl(s), and an AgCl precipitate is formed.

The net ionic equation is a chemical equation for a reaction that only lists the species involved.

In other words, an ionic equation is a chemical equation in which dissociated ions represent electrolytes in aqueous solution. Typically, this is a salt dissolved in water, with the ionic species indicated in the equation by (aq) to indicate that they are in aqueous solution.

The balanced equation will be as follows:

NaCl (aq) + AgNO₃ (aq) + AgNO₃ (aq) + AgCl(s)

Where (aq) stands for aqueous and (s) stands for solid.

In a separated aqueous solution, the total ionic equation will be:

Na⁺ (aq) + Cl⁻(aq) + Ag⁺ (aq) + NO3(aq) Ag⁺ + NO₃⁻(aq) + AgCl(s)

The spectator ions in this case are Ag⁺ and NO3 because they appear unchanged in both the product and the reagent. By writing the net ionic equation for these ions:

AgCl + Na⁺ (aq) + Cl(aq) (s)

AgCl will precipitate because it is an insoluble salt.

Finally, the net ionic equation is Na⁺(aq) + Cl⁻(aq) AgCl(s), and an AgCl precipitate is formed when a solution of NaCl(aq) is mixed with a solution of AgNO₃(aq).

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The correct answer is a) share electrons with other atoms.

Covalent bond formation occurs when atoms share electrons in order to achieve a stable electron configuration, also known as a full outermost electron shell. This is known as a covalent bond. In this type of bond, atoms share electrons in order to achieve a stable electron configuration. This is different from ionic bond formation, where atoms transfer electrons to each other in order to achieve a full outermost electron shell. Atoms collaborate with other atoms to form stable electron configurations in covalent bonds. In covalent bond, atoms share electrons with other atoms in order to achieve a stable electron configuration.

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The volume of a sample of ammonia at 0°C and 1.00 atm is approximately 0.232 L.

How to find the volume of a sample of ammonia (NH3)?

The relationship between the volume and temperature of a gas is described by Charles's law, which states that the volume of a gas is proportional to its temperature, provided that the pressure and number of moles of the gas remain constant.

Mathematically, this can be expressed as:

V1 / T1 = V2 / T2

Where V1 and T1 are the initial volume and temperature, and V2 and T2 are the final volume and temperature.

Given:

Initial volume = 0.25 L

Initial temperature = 27°C = 27 + 273.15 = 300 K

Initial pressure = 0.850 atm

Final temperature = 0°C = 273.15 K

Final pressure = 1.00 atm

To convert from one pressure to another, we can use the ideal gas law:

P1V1 = P2V2

Where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

Rearranging, we can find the final volume:

V2 = P1V1 / P2

V2 = (0.850 atm) * (0.25 L) / (1.00 atm)

V2 = 0.213 L

Finally, using Charles's law, we can find the volume of the sample at 0°C and 1.00 atm:

V2 / T2 = V1 / T1

V2 / 273.15 = V1 / 300

V1 = (V2 * 300) / 273.15

V1 = (0.213 L) * (300 K) / (273.15 K)

V1 = 0.232 L

So, the volume of a sample of ammonia at 0°C and 1.00 atm is approximately 0.232 L.

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An energy conversion is the change of energy from one form to another. An energy transfer is the movement of energy from one object to another.

Energy is a property of matter that gives us the ability to move or do work. The process of converting energy from one form to another is called energy transformation or energy conversion.

Energy is transformed in someplace every minute of every day. Thermal, electrical, nuclear, electromagnetic, mechanical, chemical, and sound energy are just a few of the many distinct sources of energy.

Energy transfer is the act of moving energy from one location to another.

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The enthalpy for the reaction, N[tex]_2[/tex](g) + 1/2 O[tex]_2[/tex](g) →N[tex]_2[/tex]O(g) is +81.5. among all the given options, the correct option is option A.

The amount of heat inside a system is measured as enthalpy. This heat is used to cause a process to occur. Enthalpy is indeed a thermodynamic quantity since every system that involves heat is referred to be a thermodynamic system.

Additionally, it is important to remember that each system has a number of players. These individuals each have their own pressure and volume. We already know that the ratio of a system's pressure to its volume is constant.

N[tex]_2[/tex](g) + 1/2 O[tex]_2[/tex](g) →N[tex]_2[/tex]O(g)

i)2 NH[tex]_3[/tex](g) + 3 N[tex]_2[/tex]O(g) → 4N[tex]_2[/tex](g) + 3 H[tex]_2[/tex]O(l) ∆H°/kJ= -1010 KJ

ii)4 NH[tex]_3[/tex](g) + 3 O[tex]_2[/tex](g)  → 2 N[tex]_2[/tex](g) + 6 H[tex]_2[/tex]O(l) ∆H°/kJ = -1531 KJ

Multiply second equation with 4 and first equation with 2. Now substract third equation from fourth equation.

N[tex]_2[/tex](g) + 1/2 O[tex]_2[/tex](g) →N[tex]_2[/tex]O(g)  ΔH=+81.5

Therefore, the enthalpy for the reaction, N[tex]_2[/tex](g) + 1/2 O[tex]_2[/tex](g) →N[tex]_2[/tex]O(g) is +81.5.

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Caroline knows the amount of a compound in moles.To find the number of molecules in the given sample of her compound, b. Avogadro's number also must be used in her calculation.

Avogadro's constant or “Avogadro's number” (symbol: L, NA) is the number of constituent particles (usually atoms or molecules) found in the amount of substance in one mole. Therefore, Avogadro's number is a proportional factor relating the molar mass of a substance to the mass of the sample. This value is equal to 6.022 140 857 (62) × 1023 mol−1.

Previous definitions of chemical quantities involved Avogadro's number, a historical term closely related to Avogadro's constant but defined differently: it was originally defined by Jean Baptiste Perrin as the number of atoms in one mole of hydrogen. It was later redefined as the number of atoms in 12 grams of the carbon-12 isotope and then generalized to relate the number of substances to their molecular weight.

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The compound to have a dipole moment, the correct statement about the dipole moment is 4) The molecule has no dipole moment.

The molecule is  CF₄, carbon tetrafluoride. The bond between the C - F is the polar covalent bond because of the greater electronegativity difference between the C and the F atoms. Even though it has no dipole moment because of the geometry that is tetrahedral geometry. The all the C - F bonds are arrange in  such a manner that the dipole moment will cancel out each other.

Thus, the  CF₄ molecule has no dipole moment. The molecule is the non - polar molecule.

This question is in complete , the complete question is :

Would you expect the following compound to have a dipole moment? if the molecule has a dipole moment, specify its direction. select the single best answer.           CF₄

1) The dipole moment is oriented from the fluorine atom towards the carbon atom.

2)  The dipole moment is oriented from the carbon atom towards the fluorine atom.

3) The orientation cannot be determined.

4) The molecule has no dipole moment.

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The one which correctly reflect the calculation required to find the work done is a) W = - P ΔV = 266 J

The initial volume = 5.42 L

The final volume = 2.75 L

The change in volume , ΔV = final volume - initial volume

                                              = 2.75 - 5.42

The change in volume , ΔV = - 2.67 L

The work done is expressed as :

Work done, W =  - P ΔV

where,

ΔV = - 2.67 L

P = 748 torr = 0.984 atm

W =  - P ΔV

W = - ( 0.98 × - 2.67 ) × 101.3 J  ( 1 atm ⋅L = 101.3 J )

W = 266 J

The work done is 266 J.

A gas is compressed from a volume of 5.42 l to a volume of 2.75 l by an external pressure of 748 torr. which of the following correctly reflect the calculations required to determine the work done on/by the system (the gas)? select all that apply.

a) W = - P ΔV = 266 J

b) W = + P ΔV = - 266 J

c) none of the above

d) both a and b

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The partial pressure of NH3(g) at equilibrium is 0.122 atm.

To calculate the partial pressure of NH3(g) at equilibrium, we can use the equilibrium constant expression (Kp = [H2S][NH3]/[NH4HS]). We know that Kp = 0.11 at 250°C and that the initial amount of NH4HS is 59.4 g. Since we also know the volume of the container is 5.0 L, we can use the ideal gas law (PV = nRT) to convert the number of moles of NH4HS to pressure.

First, we need to convert the mass of NH4HS to moles:

n = m/M = (59.4 g) / (51.11 g/mol) = 1.162 moles

Next, we can use the ideal gas law to find the pressure of NH4HS at the start of the reaction:

P = (nRT) / V = (1.162 mol)(0.0821 atm·L/mol·K)(523 K) / (5.0 L) = 9.98 atm

At equilibrium, the sum of the partial pressures of H2S and NH3 must equal 9.98 atm. Therefore, we can use the equilibrium constant expression to find the partial pressure of NH3:

Kp = [H2S][NH3]/[NH4HS] = 0.11

[NH4HS] = [H2S][NH3] / Kp = (P_H2S)(P_NH3) / 0.11

We know that P_NH4HS = 9.98 atm, so we can solve for P_NH3:

P_NH3 = [NH4HS] * Kp / [H2S] = 9.98 atm * 0.11 / P_H2S

Since we know that the sum of the partial pressures of H2S and NH3 must equal 9.98 atm, we can substitute that in for P_H2S:

P_NH3 = 9.98 atm * 0.11 / (9.98 atm - P_NH3)

Solving for P_NH3, we get P_NH3 = 0.122 atm

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Answer:

1104 K

Explanation:

We can use Charles' Law: [tex]\frac{V_1}{T_1} = \frac{V_2}{T_2}[/tex]

Plugging in the numbers gives us the initial temperature to be 1104 K

B. Hydrogen bonding with polar molecules is the  inter molecular interactions will water participate commonly with polar molecules.

Polarity causes the water molecules to attract each other. Water is polar despite possessing a zero net charge because of the structure of its molecules. The molecule's hydrogen ends are positive, and its oxygen ends are negative. Water molecules are attracted to other polar molecules and to one another as a result.

The polarity of water enables hydrogen bonds to form whenever adjacent water molecules are drawn to each other by their opposing charges. Other polar molecules and ions, such as many biomolecules including sugars, nucleic acids, and certain amino acids, are also attracted to or attracted by water.

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