calculate the molarity of a solution containing 15.2 grams of nacl dissolved in 2.5 l of solution

The molar mass of the sugar is obtained as  1.43 g/mol.

We know that the boiling point of a substance is one of the properties of the substances that could be called the colligative properties since they can be affected by the number of particles present.

We are told that the mass concentration of the substances w/w of the solution is 17% thus we have 17 g of the compound and 83 g of water. We can now get the number of moles of the substance as;

Number of moles = ?

Mass of the solution = 1000 mL * 1.015 g/mL = 1015 g or 1.015 Kg

Given that;

ΔT = K m i

ΔT = Boiling point elevation

K = Boing constant of water

m = molality of the solution

i = Van't Hoff factor

ΔT = 106 °C - 100°C

= 6 °C

Then;

6 = 0.515 *  17/MM * 1/1.015 * 1

Where MM = molar mass of the sugar

6 = 0.515 * 17/1.015 MM * 1

6 = 0.515 * 17/1.015 MM

6 = 8.755/1.015 MM

6 * 1.015 MM =  8.755

MM =  8.755/6 * 1.015

MM = 1.43 g/mol

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Answer:

I think its B because yeah lol but I hope you get it right

The following can be best described as a gaseous compound. The correct option is C.

A state of matter is one of the various forms that matter can take in physics. In everyday life, four states of matter are visible: solid, liquid, gas, and plasma.

The elements those are gases basically at standard temperature as well as pressure are referred to as gaseous elements. The periodic table contains 11 gaseous elements.

A gas is a sample of matter that conforms to the shape of the container in which it is held and acquires a uniform density inside the container, even when gravity is present and regardless of the amount of substance in the container.

The given image depicts that the molecules of particles are at some distance from each other, this usually implies for gaseous compound.

Thus, the correct option is C.

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Answer:

If n = 4, then the possible values of 1 and m depend on the equation or expression being used. Without more information, it is impossible to determine what the possible values of 1 and m might be. Can you please provide more context or information about the problem you are trying to solve?

A tube is the term used to describe the straw-like organ utilized by both plants and animals to consume food and water or to eliminate waste.

A hollow, cylindrical structure that is often present in living things is referred to as a tube. Many biological structures, such as blood veins, intestines, respiratory tracts, and the reproductive system, contain tubes. Many biological functions, including the passage of nutrients, the exchange of gases, and the removal of waste materials, depend on tubes.

These tubes are referred to as xylem and phloem in plants. While the phloem moves sugars and other nutrients from the leaves to other parts of the plant, the xylem is in charge of moving water and minerals from the roots to the rest of the plant.

Animals have many species-specific tube-like organs in charge of intake and waste elimination. Mammals, for instance, have a sophisticated digestive system that consists of the anus, esophagus, stomach, and intestines. Together, these organs help the body digest food, extract nutrients, and get rid of waste.

Generally, tubes or channels are essential for both plant and animal life because they let them take in the substances they need and let waste out.

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1) 155.52 g of oxygen of magnesium chlorate. 2) 6,246.41 g of copper(I) sulfide is produced from 78.5 moles of copper. 3) 175.95 kg of potassium produce 9.00 x \(10^3\) . 4) 1.49 x \(10^-4\)g of calcium oxide is formed from 2.95 x \(10^-6\) moles of aluminum oxide and calcium phosphide.

1. The balanced equation for the decomposition of magnesium chlorate is:

2Mg\((ClO_{3})\)2(s) → 2MgO(s) + \(3O_{2} (g)\) +\(2Cl_{2} (g)\)

From the equation, 2 moles of magnesium chlorate produce 3 moles of oxygen gas.

So, 3.24 moles of magnesium chlorate will produce (3/2) x 3.24 = 4.86 moles of oxygen.

The molar mass of oxygen is 32 g/mol.

Therefore, the mass of oxygen produced is:

4.86 moles x 32 g/mol = 155.52 g

2. The balanced equation for the reaction between copper and sulfur is:

2Cu(s) + S(s) → \(Cu_{2}S(s)\)

From the equation, 2 moles of copper react with 1 mole of sulfur to produce 1 mole of copper(I) sulfide.

So, 78.5 moles of copper will produce (1/2) x 78.5 = 39.25 moles of copper(I) sulfide.

The molar mass of copper(I) sulfide is 159.16 g/mol.

Therefore, the mass of copper(I) sulfide produced is:

39.25 moles x 159.16 g/mol = 6,246.41 g

3. The balanced equation for the reaction between potassium and water is:

2K(s) + 2\(H_{2}O\)(l) → 2KOH(aq) + \(H_{2}\)(g)

From the equation, 2 moles of potassium react with 2 moles of water to produce 1 mole of hydrogen gas.

So, 9.00 x \(10^3\) moles of hydrogen gas will be produced by the reaction of (1/2) x 9.00 x \(10^3\) = 4,500 moles of potassium.

The molar mass of potassium is 39.10 g/mol.

Therefore, the mass of potassium required is:

4,500 moles x 39.10 g/mol = 175,950 g or 175.95 kg

4. The balanced equation for the reaction between calcium phosphide and aluminum oxide is:

\(3Ca_{3}P_{2}\)(s) +\(10Al_{2}O_{3}(s)\) → 9CaO(s) + \(2Al_{2}S_{3}\)(s) + \(6P_{4}\)(g)

From the equation, 3 moles of calcium phosphide react with 10 moles of aluminum oxide to produce 9 moles of calcium oxide.

So, 2.95 x\(10^-6\) moles of aluminum oxide will produce (9/10) x 2.95 x \(10^-6\) = 2.655 x \(10^-6\) moles of calcium oxide.

The molar mass of calcium oxide is 56.08 g/mol.

Therefore, the mass of calcium oxide formed is:

2.655 x\(10^-6\) moles x 56.08 g/mol = 0.000149 g or 1.49 x \(10^-4 g\).

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Answer:

electric energy then chemical energy

Explanation:

A battery is a device that converts chemical energy

Explanation:

pure substances are those substances which are made up of one elements

mixture that those substances which are made by more than two or three elements

Answer:

Brainliest is appreciated

Explanation:

Substances which have a specific composition and cannot be separated into any constituents are called pure substances. Pure substances are further divided into elements and compounds. The combination of two or more pure substances is called a mixture. Mixtures can be classified into two types viz. heterogeneous and homogeneous mixtures. 

EXAMPLES

pure substance

gold, pure water, hydrogen gas

mixture substance

oil and water, sand and sugar

Question 1 : the empirical formula for the compound is CBr₄.

Question 2 : the molecular formula for the compound is CBr₄.

To determine the empirical formula and molecular formula of the compound, we need to analyze the given percentage composition and molecular weight. Let's go through the process step by step:

Empirical Formula:

The percentage composition by mass states that the compound contains 3.622% carbon and 96.38% bromine. We can assume a 100g sample of the compound to simplify the calculations.

Mass of carbon = (3.622/100) * 100g = 3.622g

Mass of bromine = (96.38/100) * 100g = 96.38g

Next, we need to find the moles of each element. We can use their atomic masses to convert the masses to moles.

Atomic mass of carbon (C) = 12.01 g/mol

Atomic mass of bromine (Br) = 79.90 g/mol

Moles of carbon = Mass of carbon / Atomic mass of carbon = 3.622g / 12.01 g/mol ≈ 0.3017 mol

Moles of bromine = Mass of bromine / Atomic mass of bromine = 96.38g / 79.90 g/mol ≈ 1.205 mol

To find the simplest whole-number ratio between the elements, we divide both moles by the smallest number of moles (0.3017 mol in this case):

Moles of carbon (C) = 0.3017 mol / 0.3017 mol = 1

Moles of bromine (Br) = 1.205 mol / 0.3017 mol ≈ 4

Therefore, the empirical formula for the compound is CBr₄.

Molecular Formula:

Given that the molecular weight (molar mass) of the compound is 331.6 amu, we need to compare it with the empirical formula weight.

Empirical formula weight = (Atomic mass of carbon × Number of carbon atoms) + (Atomic mass of bromine × Number of bromine atoms)

= (12.01 amu × 1) + (79.90 amu × 4) = 12.01 amu + 319.6 amu = 331.61 amu

The molecular weight is very close to the empirical formula weight, indicating that the empirical formula represents the molecular formula as well. Therefore, the molecular formula for the compound is also CBr₄.

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The compound n - hexane as shown does not dissolve in water.

Due to a large difference in polarity between the two compounds, n-Hexane does not dissolve in water.

Water is a polar molecule, which means that one end of it (the hydrogen side) has a slight positive charge and the other end (the oxygen side) has a slight negative charge. The unequal distribution of electrons within the water molecule, which produces a dipole moment, is the cause of this polarity.

N-Hexane, on the other hand, is a nonpolar molecule. The electrons are uniformly distributed throughout the molecule, which is made up of carbon and hydrogen atoms bound together in a straight chain. N-Hexane lacks a substantial dipole moment as a result.

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When the reaction of  Grignard reagent reacted with methanol will yield a tertiary alcohol. Therefore, Option C tertiary alcohol is correct.

Contains a carbon-metal link, Grignard reagents are chemicals used in catalysis. They generally result from the anhydrous reaction of magnesium metal with an alkyl or aryl halide. Because of their high reactivity, Grignard reagents frequently act as nucleophiles in organic reactions.

An alkyl group from a Grignard reagent binds to the oxygen atom of methanol (CH3OH) when it interacts with the methanol, breaking the carbon-metal connection. A precursor alkoxide is created as a result. The equivalent alcohol is then produced by protonating the intermediate alkoxide.

The reaction of a Grignard reagent with methanol leads to the formation of a tertiary alcohol.

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Water is the best insulator because it has the greatest specific heat capacity and all other substances have low specific heat than the water.

The term specific heat capacity is defined as the amount of heat in joules required to increase the temperature of one gram of a substance by one degree Celsius.

An insulator is a substance which conducts heat to a very miserable extent.

From the definition of specific heat capacity and insulator, we conclude that the higher the value of specific heat capacity, the harder it would be to heat up the material, that is, the more heat would be needed.

All the given substances, only water has the greatest specific heat capacity, therefore, it's the best insulator.

Gold is the best conductor, as it has the lowest specific heat capacity.

Thus, the best insulator is water.

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Your question is incomplete, most probably your question was

Table C: Known Specific Heat Values for Common

Materials

Material Specific Heat (J/g*C)

Water 4.18

Concrete 0.88

Wood 1.80

Aluminum 0.90

Glass 0.84

Sand 0.83

Steel 0.49

Iron 0.44

Copper 0.38

Lead 0.16

Gold 0.13

What is the best insulator and why?

Constitutional isomers, they only differ in the position of the substituents.

The term isomers refers to the compounds that have the same molecular formula but different structural formulas. This implies that the atom to atom connection and the and the position of the substituents tend to differ quite markedly.

Now when we talk about the constitutional isomers, they only differ in the position of the substituents. The two compounds are essentially the same in the carbon structure but the placement of the substituents do differ. The two cyclic constitutional isomers of trans-1,2-  dimethyl cyclopentane with the same size ring are shown in the image attached.

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The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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Answer:

If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.

The concentration of the H2SO4 solution is 0.080 M.

The concentration of 50.0 ml of a solution of H2SO4 can be found by titrating the acid with a standardized solution of Ba(OH)2. This can be achieved by first preparing a 0.20M solution of Ba(OH)2 by dissolving a known mass of the reagent in distilled water and diluting to the mark. The end point is reached when all the H2SO4 has reacted with Ba(OH)2 and no more acid is left to react with the reagent.When 40.0 ml of 0.20M Ba(OH)2 titrant was added, we can calculate the amount of moles of Ba(OH)2 that reacted with the H2SO4 and use this value to find the concentration of H2SO4. To do this, we can use the following balanced equation:H2SO4 + 2Ba(OH)2 → BaSO4 + 2H2OFrom the balanced equation, we can see that one mole of H2SO4 reacts with two moles of Ba(OH)2. Thus, the number of moles of Ba(OH)2 used in the titration is given by:(40.0/1000) L × (0.20 mol/L) = 0.008 molWe can use the number of moles of Ba(OH)2 used to calculate the number of moles of H2SO4 present in the original solution. Since one mole of H2SO4 reacts with two moles of Ba(OH)2, the number of moles of H2SO4 in the solution is given by:0.008 mol Ba(OH)2 × (1 mol H2SO4 / 2 mol Ba(OH)2) = 0.004 mol H2SO4.The concentration of H2SO4 is then given by dividing the number of moles of H2SO4 by the volume of the solution in liters:0.004 mol / (50.0/1000) L = 0.080 M.

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Explanation:

It is the emission of electron from a metal under the effect of light is known as photo electric effect

I hope this imformation help full for you

Answer:

Compound

Explanation:

SiO2 is silicon dioxide which is a compound.

Step 1 - Finding the molar mass of NaAl(OH)CO3

To find the molar mass of a compound, we just have to multiply the molar mass of each element by the number of times it appears in the formula of the substance:

Working on the math, we obtain:

Step 2 - Finding the mass of one molecule of Rolaid

The number of Rolaid molecules in one mole is 6.02*10^23. Therefore, when we say the molar mass of Rolaid is 126.99 g/mol it is the same thing as saying that 6.02*10^23 molecules of Rolaid weight 126.99 g.

Therefore, to discover the mass of only one molecule of Rolaid, we should divide the molar mass by the number of molecules contained in one mole:

Working the math, we obtain thus:

This is the mass of only one molecule of Rolaid.

Step 3 - Finding the mass of 3 molecules of rolaid

The hard part is done. Now that we have obtained the mass of one molecule of rolaid, we just have to multiply it by three in order to obtain the total mass of three molecules of rolaid:

The mass of three rolaid molecules is, therefore, 6.3*10^(-22) g.

Step 4

The specific heat capacity of the material is obtained as 0.15 J/g°C.

We know that the term specific heat capacity has to do with the heat that is able to cause the temperature of 1 Kg of a material to rise by 1K. We know that there are some materials that are able to rise in temperature much more than other substances when they are heated.

We are told that the heat that is absorbed by the material is 143 cal or 598 J

Thus;

H = mcdT

m = mass of the object

c = specific heat capacity of the material

dT = temperature change

Then;

598 = 111.4 * c * (65.6 -  29.5)

c = 598/111.4 * (65.6 -  29.5)

c = 0.15 J/g°C

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Considering the phase diagram, the state of matter that exists in area B is gas.

The correct option is A.

A phase diagram is a graphical representation that shows the conditions of temperature and pressure at which different phases or states of a substance exist.

The axes of a phase diagram typically represent temperature (usually on the horizontal axis) and pressure (usually on the vertical axis). The diagram is divided into regions that correspond to different phases, and the lines separating these regions represent phase boundaries.

The point where three phase boundaries meet is known as the triple point, which represents the temperature and pressure at which all three phases can coexist in equilibrium.

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An electron has a negative charge.

The charge of an electron is a fundamental property of the particle, and it is denoted by the symbol "e." The magnitude of the charge of an electron is approximately 1.602 × 10^-19 coulombs (C). This value is considered the elementary charge and is used as a reference for other charges. The charge of an electron plays a significant role in determining the behavior and interactions of atoms and molecules. It is opposite in sign to the charge of a proton, which is positive. The electron's charge allows it to interact with other charged particles, such as protons and ions, through electrostatic forces. Electrons are subatomic particles that orbit the nucleus of an atom in specific energy levels or orbitals. They contribute to the overall stability and chemical properties of atoms and participate in chemical bonding and reactions. The movement of electrons between atoms is what enables the formation of chemical bonds and the sharing or transfer of electrons to create ions. In summary, the charge of an electron is negative, and it plays a fundamental role in the structure and behavior of atoms and molecules.

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CuI2 is not a known compound. Copper compounds typically have different oxidation states for copper, resulting in various compound names.

Copper(II) oxide (CuO): It is a black solid compound where copper is in the +2 oxidation state. It is commonly used as a pigment and in catalytic reactions.

Copper(II) sulfate (CuSO4): It is a blue crystalline compound in which copper is in the +2 oxidation state. It is used in various applications such as agriculture, electroplating, and as a laboratory reagent.

Copper(I) oxide (Cu2O): It is a red crystalline compound in which copper is in the +1 oxidation state. It is used as a pigment, in solar cells, and as a catalyst.

Copper(II) chloride (CuCl2): It is a greenish-brown solid compound in which copper is in the +2 oxidation state. It is utilized in various chemical processes, including etching and catalyst synthesis.

Copper(II) nitrate (Cu(NO3)2): It is a blue crystalline compound where copper is in the +2 oxidation state. It is commonly used in the production of catalysts, as a coloring agent, and in electroplating.

These are just a few examples of copper compounds with different oxidation states and properties. It's important to note that the compound CuI2 mentioned in the question, if it exists, would be an exception to the typical nomenclature for copper compounds.

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Answer: 2.749 x 10^-14

Explanation:

Given:

The concentration of Ce(IO3)4 in the solution = 1.5 x 10-2 g/100 mL= 0.15 g/1000 mL​​​​​​​= 0.15 g/L

Molar mass of Ce(IO3)4 = 839.7267 g/mol

Therefore, the molarity of Ce(IO3)4 in the solution is given by:

\($$\begin{gathered}M=\frac{0.15 \mathrm{~g} / L}{839.7267 \mathrm{~g} / \mathrm{mol}} \\M=1.7863 \times 10^{-\mathbf{4}} \mathrm{mol} / {L}=\mathbf{1 . 7 8 6 3 \times 1 0 ^ { - \mathbf { 4 } } \boldsymbol { M }}\end{gathered}$$\)

The solubility equilibrium is given by:

\($$\mathrm{Ce}\left(\mathrm{IO}_{3}\right)_{4(s)} \rightleftharpoons \mathrm{Ce}_{(a q)}^{3+}+3 \mathrm{IO}_{3}^{-}(a q)$$\)

Therefore, the solubility product is given by:

\(\begin{gathered}K_{s p}=\left[C e^{3+}\right] \cdot\left[I O_{3}^{-}\right]^{3} \\\therefore K_{s p}=\left(1.7863 \times 10^{-4}\right) \times\left(3 \times 1.7863 \times 10^{-4}\right)^{3}\end{gathered}\)

\(\therefore {K_{s p}=2.749 \times 10^{-14}\)

1. The constituent gases of air are:

2. The surrounding air is not seen with the eyes because it is transparent. Air molecules are not visible to the na-ked eye, and they do not scatter or absorb visible light significantly. Therefore, air appears colorless and transparent.

3. To prove that air supports burning, you can perform an experiment with a burning candle. Place a glass jar or bell jar over a lit candle, ensuring that the jar is airtight. As the candle burns, it consumes oxygen from the air inside the jar. Eventually, the candle flame will go out due to the lack of oxygen, proving that air (specifically oxygen) is necessary for burning.

4. To show that air occupies space, you can perform a simple experiment using a plastic bottle or syringe. Fill the bottle or syringe with water, ensuring there are no air bubbles. Then, cover the opening tightly and try to compress the air inside. You will find that it is not possible to compress the air significantly, indicating that air occupies space.

5. To prove that air has weight, you can use a sensitive balance or scale. Weigh an airtight container or balloon, and then fill it with air. The weight of the container or balloon with the added air will be greater than its initial weight, demonstrating that air has weight.

6. Air is useful to us in various ways. Three points highlighting the importance of air are:

7. Three properties of air include:

Air exerts force in various ways. For example, air pressure allows objects like airplanes to fly by providing lift. Air resistance or drag opposes the motion of objects moving through the air, creating a force that can affect their speed and trajectory.

8. Four effects of air pollution include:

9. Causes of pollution:

10. Two control measures for air pollution include:

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Answer:

Explanation:

100/56 = 1.79 moles MgS

56 came from the periodic table for Mg and S

The concentration of 2NH₃ is zero and initial change in equilibrium for 2NH₃ is 2x.

By introducing or removing one or more reactants or products, a chemical system that is in equilibrium can be momentarily shifted out of equilibrium. To bring the system back to equilibrium, more adjustments are made to the reactant and product concentrations.

Initial:

The reactants' initial concentrations are 2.0 mol H₂ and 1.0 mol N₂. The concentration of the product 2NH₃ is initially 0.

Change:

Let's use the variable "x" to represent the change in concentration.

The reactant's concentration decreases over time by a factor of x. Put any coefficients you have in front of the variable x as -3x for 3H₂ and -x for N₂ if you have any (such as 3H₂). Since 2 moles of NH₃ are produced on the product side, its concentration will change by +2x.

Equilibrium:

Equilibrium = Initial + change

For 3H₂ = 2.0 [initial] + (-3x) [change] = 2.0 - 3x

For N₂ = 1.0 + (-x) = 1.0 - x

For 2NH₃ = 0 + 2x = 2x

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The hardest portion of any complicated or difficult task is always the Carbon. like me, waking up from sleep and into the day requires a little additional energy.

Existing bonds must break and new ones must form for a response to happen. Only when the products are more stable than the reactants will a reaction progress. In a fire, carbon in the form of wood is changed into CO2, which is a more stable form of carbon than wood.

As a result, the reaction continues, and heat is produced. The initial heat needed to start the fire is, in this case, the activation energy. This is demonstrated by our efforts and matches that were lost.

Thus, The hardest portion of any complicated or difficult task is always the Carbon. like me, waking up from sleep and into the day requires a little additional energy.

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The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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