The statement, in a mixture of gases, the total pressure is the sum of the individual partial pressures of gases in the mixture paraphrases ________.

Lewis dot structure is used to represent the lone pairs of electrons and bonded pair of electrons in an atom or a molecule of an element.

The Lewis dot structure of an atom or molecule shows the valence shell electrons around the symbol of the element. The valence electrons are written in pairs and are written as dots. Neon belongs to the 18th group of the periodic table and thus is a noble gas. It has eight valence electrons. Lewis structures is also known as Lewis dot structures or electron dot structures are diagrams that represent the valence electrons of atoms within a molecule. The Lewis symbols and Lewis structures help visualize the valence electrons of atoms and molecules whether they exist as lone pairs or within bonds.

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Answer:

H is 2.74%

Cl is 97.24%

Explanation:

HCl molar mass is 36.458

H is 1 so 1/36.458 is .0274 or 2.74 percent

Cl is 35.453 so 35.453/36.458 is .9724 or 97.24 percent

Answer:

500K

Explanation:

We use Charle's law that states that at a constant pressure the volume of a given mass of a gas varies linearly with absolute temperature of the gas.

V ∝ T

V = kT

∴ k is the proportionality constant

v/T = as it a ratio between volume and temperature the value of k would be a constant quantity.

Therefore it can be written as:

v1 / T1 = V2 / T2

Now solving the question:

V1 = 600 torr

T1 = 300 K

V2 = 1000 torr

T2 = ?

600/300 = 1000/T2

T2= (1000 x 300)/600

T2= 500 K

The molar mass of potassium nitrate is 101 g. Thus the mass of 0.0237 moles of potassium nitrate is 2.39 grams.

The mass of one mole of a compound is called its molar mass. A compound containing 6.022 × 10²³ atoms is called one mole of the compound.

Mass of potassium = 39 g/mol

mass of nitrogen = 14 g/mol

mass of oxygen = 16 g/mol

mass of 3 O = 48 g

molar mass of KNO₃ = 48 + 39 + 14 = 101 g/mol

The mass of one mole of KNO₃ is 101 g. Then mass of 0.0237 mole is:

0.0237 × 101 = 2.39 g.

Therefore, the mass of 0.0237 moles of potassium nitrate is 2.39 g.

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There would be 4 * 10^22 moles of the sodium ions.

We have to know that the number of moles of the ions can be obtained by the use of the formula for the Avogadro's number. From the Avogadro's number, we know that one mole of the substance is going to contain about 6.02 * 10^23 molecules of the sodium ions.

As such we have that;

If 1 mole can contain about 6.02 * 10^23 molecules of the sodium ions

x moles would contain 2.4x10^46 molecules of Na ions

x = 1 * 2.4x10^46/ 6.02 * 10^23

x = 4 * 10^22 moles

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The approximate bonding order of At and O can be predicted using the Lewis structure of Ato3

Lewis structure, also known as electron-dot framework, is a physical formula in which dots serve as placeholders for electrons; two dots across two atoms signify a covalent link. Gilbert Newton Lewis, the man behind its 1916 introduction, gave it its name.

The Lewis structure of water, or H2O, is shown here as an example. The atom's core electrons are represented by each symbol, along with the nucleus. A hydrogen atom's nucleus is represented by each "H" in this diagram, and an oxygen atom's nucleus and two core electrons are represented by each "O". The valence electrons in the dots are not in bonds.

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The molecular formula of the chemical substance is C2H3 * 2.068 = C4H6 which is option (c)

The empirical formula of a chemical substance gives the lowest whole-number ratio of atoms in a molecule. The molar mass of a substance is the mass of one mole of the substance. To find the molecular formula of a substance, we need to determine the ratio of atoms in the molecule and compare it to the ratio given by the empirical formula.

The molar mass of the substance is 54.091 g/mol, and the empirical formula is C2H3. To find the molecular formula, we can divide the molar mass by the molar mass of the empirical formula.

54.091 g/mol / (2 x 12.011 g/mol + 3 x 1.008 g/mol) = 54.091 g/mol / 26.042 g/mol = 2.068

Since the ratio of atoms in the molecule is 2.068 times that of the empirical formula, the molecular formula is C2H3 * 2.068 = C4H6 which is option (c)

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Answer:

C4H6 (c)

Explanation:

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The following are the true statements: Period 3 elements have The valence electrons of group 5A The highest principal quantum The valence electrons of group 2A six 2p electrons elements are in the 6s subshell. number of period 2 elements is 2

Valence electrons are placed in the outer most orbit of the atom and that orbit (shell) is called the valence shell. Let‟s take an example to identify them. Write the configuration of Oxygen 8O : 1s2 , 2s2 , 2p4

Oxygen has 6 electrons in its outer most orbit (2+4) that means it has 6 valence electrons and orbit 2 is called the valence shell. Now place these electrons in orbitals of their respective sub-shell.

Oxygen has 6 valence electrons and it needs 2 more electrons to achieve octet. The number of electrons needed to complete octet is termed as the valency of an element. This value can be obtained by subtracting the number of valence electrons from octet (8). So, the valency of Oxygen is 2. That means Oxygen is ready to share its 2 valence electrons or ready to accept 2 more electrons in order to achieve octet.

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A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute. The expression to determine the number of gallons left in the tank after m minutes is  35- m/4.

Considering that a 35-gallon water tank leaks at a rate of a quarter per minute.

Let "m" stand for the duration in minutes.

Gallons remaining in the tank equal the sum of the water that was originally inside and the water that has leaked.

35 gallons of water are still available after subtracting the amount of minutes spent at the rate of leakage.

Water remaining in gallons = 35 gallons - m minutes x 1/4

Water remaining in gallons = 35 - m/4

Your question is incomplete but most probably your full question was

A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute. Write an expression to determine the number of gallons left in the tank after m minutes.

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The result of the Coriolis effect is the rotation of the earth on its axis. So the correct option is B.

The Coriolis effect is a type of force to which the fluids of the earth are exposed. It is the acceleration they receive due to the rotation of the earth, what is generated is a deviation in their trajectory which now causes their trajectory to be curved. This force it is exposed to is called the coriolis force, but it is not a real force since there is nothing pushing on it.

The acceleration to which the fluids are exposed will be perpendicular to the axis of rotation of the earth and to the components of its velocity.

Therefore, we can confirm that the correct option is B. the rotation of the earth on its axis.

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The Coriolis effect is the result of which of the following?

A. winds spinning off the equator

B. the rotation of the earth on its axis

C. the different air movements north and south of the equator

D. the friction that slows down winds near the earth’s surface

Answer:

liquid carbon disulfide and oxygen gas produce carbon dioxide gas and sulfur dioxide gas

Explanation:

18.25 mL of a 2.63 M solution you need to dilute to 100 mL with a final solution concentration of 0.48.

The amount of a substance is often measured by how much it weighs – i.e. in g or mg or kg etc. The concentration is the amount divided by the volume it is dissolved in. concentration = amount divided by volume

Another way of representing the amount of a substance is to use the concept of mole. A mole is simply 6.0223 x 1023 molecules (this is “Avogadro’s number”)

Eggs come in dozens (12), molecules come in moles (6 x 1023) The mass of a mole of molecules is the formula weight in grams. This is sometimes called “molar mass” with symbol M. Sometimes it is referred to as molecular weight. Sometimes it is called “relative molecular mass” since the mass of a carbon element is designated to be 12 and other molecules or elements are given masses relative to that.

The molar mass of a small molecule such as an amino acid (eg glycine is NH2CH2COOH and has molecular mass = 75.07 g.mol-1) is much less than the molar mass of a protein (eg haemoglobin has molecular mass ~ 64500 g.mol-1).

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So the new concentration of the solution is 0.0001M.

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Give a handwritten explanation and response. Estimate the expected melting temperature of cadmium (Cd), vanadium, and other elements based on the patterns you have found.

What does melting point mean?

The temperature at which a pure substance's solid and liquid states can coexist in equilibrium is known as the melting point. A solid's temperature will rise when heat is added to it until its melting point is reached.

How do melting and boiling points differ?

The melting point

The temperature that a quality of output into a liquid under normal air pressure is known as the melting point. The temperature at which a liquid's vapor pressure equals the pressure around it, turning the liquid into vapor (and vice versa).

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Niobium has an atomic mass of 92.90638 u. An atomic mass unit serves as the unit of measurement for mass (amu). A mass unit of an atom is 1.66 x 10-24 grammes.

What does the term "atomic" refer to?

Atomic is derived from the Greek word atomos, which means "uncut" or "indivisible," and means "indivisible particle" in Latin. atomic is defined as an adjective that refers to, contains, or is related to atoms.

What does atomic energy entail?

Nuclear energy, also known as atomic energy, is the considerable quantity of energy released in operations that have an impact on atomic nuclei, or dense centres of atoms. It differs from other atomic phenomena' energy, which solely involves an atom's orbital electrons in regular chemical reactions, for example.

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Answer:

1 mole of Nb = 92.906 grams

In chemistry, a hydroxy or hydroxyl group is a functional group with the chemical formula -OH and consists of an oxygen atom covalently bonded to a hydrogen atom. In organic chemistry, alcohols and carboxylic acids contain one or more hydroxyl groups. In organic chemistry, an aldehyde is an organic compound containing a functional group with the structure R-CH=O. The functional group itself is sometimes called an aldehyde, but it can also be classified as a formyl group. Aldehydes are ubiquitous and play an important role in technology and biology. The group priority is -OCH3>OH>COOH>CHO. According to the F. Cahn-Ingold-Prelog system, a priority (1, 2, 3, or 4) is assigned in descending order of atomic number to the atoms directly bonded to the stereocenter the atom with the highest atomic number gets the highest priority.

Answer: 0.31

Explanation:

molarity = 0.32 mol of solute / 1 L solution

find kg of solute: 0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg

find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution

find kg of solvent: 1.08 kg solution - 0.046976 kg solute =  1.033 kg water

molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg

According to molar concentration , the molality of the solution upto second decimal place  is 0.31  m.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion.

molarity = 0.32 mol of solute / 1 L solution.To find kg of solute-0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg. To find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution. To find kg of solvent: 1.08 kg solution - 0.046976 kg solute =  1.033 kg water.

Thus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg.

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Cyanides inhibit lactose permease by abolishing the proton gradient between the inside and outside of the cell

By interfering with the proton gradient across the cell membrane, cyanides prevent the lactose permease protein from transporting lactose across the membrane. Protons (H+) are pumped out of the cell by the proton-motive force, which results in a difference in proton concentration between the inside and outside of the cell and creates the proton gradient.

This proton gradient is used by lactose permease to propel lactose transport into the cell. The enzyme cytochrome oxidase, which is found in the mitochondria and is in charge of the last stage of the electron transport chain, binds to the iron atom in the active site. This binding prevents the enzyme from working, which inhibits proton pumping and causes the proton gradient to fall, both of which hinder lactose permease from working.

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Answer:

The density of any given liquid is equivalent to the mass of the liquiddivided by the volume of the liquid.From the given information, we have:The mass of the unknown liquid to be = 972 gThe volume of the unknown liquid to be = 0.610 L = 610 cm³If the formula for calculating Then;The Density of the unknown liquid ≅ 1.593  g/cm³In conclusion, the density of the unknown liquid is 1.593  g/cm³ to 3 significant figures.

Explanation:

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5) The theoretical yield of H₂O is 36.04g.

6) The theoretical volume of CO2 produced is 0.005 L.

7) The mass of water produced is 0.981g.

The theoretical yield of a reaction is the maximum amount of product that can be produced from a given amount of reactants, assuming that the reaction goes to completion. To calculate the theoretical yield, we need to know the balanced equation for the reaction and the amounts of reactants used.

5) Given and unknown:

The balanced equation for the reaction is 2 H2(g) + O2(g) → 2 H₂O(1)

The amount of H2 used is 6

The amount of O2 used is 30g

Steps:

1.    Determine the limiting reactant: The limiting reactant is the reactant that will be completely consumed before the other reactant is consumed. In this case, the limiting reactant is H2 because 6g of H2 will react completely with 6g of O2, while 30g of O2 will still have some remaining.

2.    Calculate the theoretical yield of the product: The theoretical yield of H2O can be calculated by using the stoichiometry of the reaction. The balanced equation tells us that 2 moles of H2 react with 1 mole of O2 to form 2 moles of H2O. We can use the molar mass of H2 and O2 to convert the given mass of each reactant to moles, and then use the balanced equation to determine the theoretical yield of H2O.

Solution:

·         Molar mass of H2 = 2.02 g/mol

·         Molar mass of O2 = 32 g/mol

·         6g of H2 is equal to 6/2.02 = 2.97 moles

·         30g of O2 is equal to 30/32 = 0.9375 moles

·         Since H2 is the limiting reactant, the reaction will consume 2.97 moles of H2.

·         Using the balanced equation, 2 moles of H2 will produce 2 moles of H2O

·         Therefore, the theoretical yield of H2O is 2 x 18.02 = 36.04 g

·         Therefore, the theoretical yield of H₂O is 36.04g.

6) Given and unknown:

The balanced equation for the reaction is 2 C2H6(g) + 7 O2(g) → 6 H2O(l) + 4 CO2(g)

The volume of C2H6 used is 0.42L

The volume of O2 used is 3.12L

The unknown is the theoretical volume of CO2 produced

Steps:

Convert the volumes of reactants to moles using the ideal gas laws PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant and T is the temperature.

Determine the limiting reactant: The limiting reactant is the reactant that will be completely consumed before the other reactant is consumed.

Use the balanced equation to calculate the number of moles of CO2 produced.

Convert the moles of CO2 to volume using the ideal gas laws PV = nRT

Solution:

Ideal gas constant R = 8.314 J/mol*K

Temperature T = 298 K

Pressure P = 1 atm

Molar mass of C2H6 = 30.07 g/mol

Molar mass of O2 = 32 g/mol

Molar mass of CO2 = 44 g/mol

0.42L of C2H6 is equal to 0.42 x (1 x 10^3) / (8.314 x 298) = 0.0058 mol

3.12L of O2 is equal to 3.12 x (1 x 10^3) / (8.314 x 298) = 0.0433 mol

From the balanced equation, we can see that for every 2 moles of C2H6, 4 moles of CO2 are produced.

Therefore, 0.0058 mol of C2H6 will produce 0.0058 x 2 = 0.0116 mol of CO2

Finally, 0.0116 mol of CO2 will produce 0.0116 x (44/1000) = 0.005L of CO2.

Therefore, the theoretical volume of CO2 produced is 0.005 L

7) Given and unknown:

The balanced equation for the reaction is 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H₂O(1)

The mass of NH3 used is 1.54g

The mass of O2 used is 1.25g

The unknown is the mass of water produced

Steps:

Determine the limiting reactant: The limiting reactant is the reactant that will be completely consumed before the other reactant is consumed.

Use the balanced equation to calculate the number of moles of water produced.

Calculate the mass of water produced by using the molar mass of water

Solution:

Molar mass of NH3 = 17 g/mol

Molar mass of O2 = 32 g/mol

Molar mass of H2O = 18 g/mol

1.54g of NH3 is equal to 1.54 / 17 = 0.0906 mol

1.25g of O2 is equal to 1.25 / 32 = 0.0391 mol

From the balanced equation, we can see that for every 4 moles of NH3, 6 moles of H2O are produced.

Therefore, 0.0906 mol of NH3 will produce 0.0906 x 6 = 0.0544 mol of H2O

Finally, 0.0544 mol of H2O will produce 0.0544 x 18 = 0.981g of H2O

Therefore, the mass of water produced is 0.981g

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The number of ammonia molecules made when 6 grams of hydrogen gas reacts with excess nitrogen is 12  × 10²³ molecules.

The reaction is given as :

3H₂   +   N₂  ⇄    2NH₃

Mass of the hydrogen = 6 g

moles of the hydrogen = mass / molar mass

                                      = 6 / 2

                                      = 3 mol

3 moles of the H₂   produces 2 moles of the NH₃

moles of the NH₃ = (2 / 3)  × 3

                             = 2 mol

1 mol = 6.022 × 10²³ molecules

molecules of the ammonia, NH₃ = 2 × 6.022 × 10²³ molecules

                                                      = 12  × 10²³ molecules

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One single amino acid weighs 110 D a. Now, this problem is fairly simple. The way we find out, the weight of 701 amino acids is just multiplying. Ah, that number by 110. So all we have to dio is multiply 682 by 110. So our final answer will be 77,110.

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Pea plants uses the light energy from sun for photosynthesis and they synthesis chemical energy in leaves.

Photosynthesis is a biochemical process taking place in green plants to synthesis energy with the aid of light energy. The green pigments chlorophyll absorbs enough light energy for this biochemical reactions.

The photosynthetic reaction is the reaction between water and carbon dioxide producing glucose and oxygen. Thus, this process intakes carbon dioxide that we exhale and release oxygen that aids our respiration.

Pea plants are green plants undergoing photosynthesis. They uses light energy to produce chemical energy. With the presence of sunlight, they can easily carry photosynthetic reaction in leaves.

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The balanced chemical reaction of sodium and sulfur can best be described as: B. 2Na(s) + S(s) → Na₂S(s)

To represent the reaction between sodium and sulfur, we would express the elements and their states as shown above. So, 2 atoms of sodium would react with 1 atom of sulphur to yield a compund known as sodium sulphide.

This compound contains two atoms of sodium and 1 atom of sulphur. The physical state is solid. So, the correct option number that expresses this is B.

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The atomic model changes over time because the atomic model was based on theories and discoveries.

The simplest atomic model is the Dalton atomic model, which was put forward by John Dalton, a British scientist. According to this atomic model, atoms are solid balls that have no charge. In addition, according to this atomic theory, the atom is the smallest unit that cannot be divided again. Different chemical elements will have different types of atoms.

Unfortunately, Dalton's theory cannot explain how atoms as solid balls can conduct electric current. In fact, electricity is electrons in motion. He could not prove other particles that conduct electric current. Dalton's theory was followed hundreds of years later until it was finally broken by later scientists.

The second atomic model is the Thompson atomic model. As the name implies, this atomic model was discovered by Joseph John Thompson. Thompson's atomic model is shaped like a raisin bun. That's because the atom is a positively charged solid ball with negative particles (electrons) scattered in it. In addition, the number of positive and negative charges on the atom is the same. This atomic model was proven by Thomson's research using cathode ray tubes.

Unfortunately, Thomson's model of the atom cannot explain the arrangement of positive and negative charges in an atom.

Rutherford's atomic model put forward by Ernest Rutherford in 1911. In this atomic theory, each atom contains a positively charged atomic nucleus with electrons surrounding it in its trajectory. In addition, this atomic mass is concentrated in the atomic nucleus and most of the atomic volume is empty space, you know. This was proven from the results of an experiment on firing metal by alpha rays, which is also known as the Geiger-Marsden Experiment.

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Answer: Jhon cena licked my

Explanation:

HF, H[tex]_2[/tex]C[tex]_2[/tex]0[tex]_4[/tex] , H[tex]_2[/tex]SO[tex]_3[/tex] are acid. Ca(OH)[tex]_2[/tex], RbOH are base. NH[tex]_4[/tex]Cl, NaF, CaCl[tex]_2[/tex] are salts, among all the given options.

Numerous acids and bases are found in nature on a regular basis, including citric acid in citrus fruits like oranges and lemons, tartaric acid and tamarind, malic acid the apples, lactic acid and milk and dairy products, and hydrochloric acid and gastric fluids. Similar to acids, several bases are present, including lime water. In our daily lives, we utilise several of these acids, like vinegar and acetic acid within the kitchen, lactic acid for washing clothes, baking soda for cooking, washing soda to cleaning, etc. HF, H[tex]_2[/tex]C[tex]_2[/tex]0[tex]_4[/tex] , H[tex]_2[/tex]SO[tex]_3[/tex] are acid. Ca(OH)[tex]_2[/tex], RbOH are base. NH[tex]_4[/tex]Cl, NaF, CaCl[tex]_2[/tex] are salts,

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A person uses 720 kcal on a long bike. A. The energy in joules is equal to 3221680 Joules. B. The energy in kilojoules is 3221.689 KJ.

The term energy is defined as the capacity for doing work. It is exist in different types like potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.

Given the energy used for the bike is 770 kcal.

We know that

1 cal = 4.184 J

The energy in Joules = 770 × 1000 × 4.184

= 3221680 J

The energy in kilojoules =  3221689 / 1000

= 3221.689 KJ

Thus, A. The energy in joules is equal to 3221680 Joules. B. The energy in kilojoules is 3221.689 KJ.

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The Lewis structure for acetamide is drawn by connecting the atoms with single bonds and assigning lone pairs of electrons to the non-bonding atoms.

The central carbon atom has four bonds and no lone pairs, while the oxygen atom has two bonds and two lone pairs. The two nitrogen atoms each have three bonds and one lone pair. The hydrogen atoms only have one bond each, as they only have one electron in their outer shell.

For the resonance forms of acetamide, the Lewis structure is drawn by connecting the atoms using double bonds instead of single bonds, while keeping the same number of lone pairs.

This forms a resonance hybrid between the two forms, where the electrons are delocalized. The central carbon atom has two double bonds and no lone pairs, while the oxygen atom has one double bond and two lone pairs. The two nitrogen atoms each have two double bonds and one lone pair. The hydrogen atoms also only have one bond each.

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According to molar concentration , the molality of the solution up to second decimal place  is 0.31  m.

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According to molar concentration, the molality of the solution up to second decimal place is 0.31m.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution. Most commonly used unit for molar concentration is moles/liter. The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion.

Understanding a solution's molarity is important since it allows you to determine the actual concentration as well as whether the solution is diluted or concentrated. Measures of solution concentration include molality and molarity.

Molarity = 0.32 mol of solute / 1 L solution.

To find kg of solute-0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg.

To find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution.

To find kg of solvent: 1.08 kg solution - 0.046976 kg solute = 1.033 kg water.

Thus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg

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Answer:

a globe

snow rain clouds