if a substance x has a solubility of 7.0×10−13g ml−1, and a molar mass of 187 g mol−1, what is the molar solubility of the substance?

Answer:

evaporation and condesation

Explanation:

because he was curiuos

Answer:

c

Explanation:

Friction is a contact force when two surfaces interact. The second equation is the kinetic frictional force that is used when two surfaces are sliding against each other

The total pressure of all gases produced in the explosion, once the bunker cools to 35°C, is approximately 1.82 atm (to two decimal places).

To solve this problem, we need to use the ideal gas law and the stoichiometry of the reaction to determine the total pressure of all gases produced in the explosion.

First, let's calculate the number of moles of H2 produced in the explosion:

Convert the mass of TNT to moles:

molar mass of TNT = 227.13 g/mol

mass of TNT = 1.09 kg = 1090 g

moles of TNT = mass of TNT / molar mass of TNT

From the balanced chemical equation, we see that 2 moles of TNT produce 5 moles of H2.

So, moles of H2 = (moles of TNT) x (5 moles of H2 / 2 moles of TNT)

Next, let's calculate the volume of H2 at 35°C and 623.1 torr:

Convert the pressure of H2 to atm:

1 atm = 760 torr

pressure of H2 = 623.1 torr / 760 torr/atm

Apply the ideal gas law to calculate the volume of H2:

PV = nRT

V = (moles of H2) x (R) x (temperature in Kelvin) / (pressure of H2)

where:

R = ideal gas constant = 0.0821 L·atm/(mol·K)

temperature in Kelvin = (35°C + 273.15)

Finally, let's calculate the total pressure of all gases produced:

Total pressure = pressure of H2 + atmospheric pressure

Now, let's plug in the values and perform the calculations:

Moles of TNT = 1090 g / 227.13 g/mol

Moles of TNT = 4.799 moles

Moles of H2 = (4.799 moles) x (5 moles of H2 / 2 moles of TNT)

Moles of H2 = 11.9975 moles

Pressure of H2 = 623.1 torr / 760 torr/atm

Pressure of H2 = 0.82092 atm

Temperature in Kelvin = (35°C + 273.15)

Temperature in Kelvin = 308.15 K

Volume of H2 = (11.9975 moles) x (0.0821 L·atm/(mol·K)) x (308.15 K) / (0.82092 atm)

Volume of H2 = 350.71 L

Total pressure = 0.82092 atm + atmospheric pressure

The atmospheric pressure is not given in the problem, so you'll need to use the appropriate value for your location. In standard conditions, the atmospheric pressure is approximately 1 atm.

Therefore, the total pressure of all gases produced in the explosion, once the bunker cools to 35°C, is approximately 1.82 atm (to two decimal places).

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The empirical formula of the compound is NO2, option b. To find the empirical formula, we need to first determine the amount of nitrogen in the compound. We can do this by subtracting the mass of oxygen (1.000 g) from the total mass of the compound (1.438 g), which gives us 0.438 g of nitrogen.

Next, we need to convert these masses into moles by dividing by their respective molar masses. Oxygen has a molar mass of 16.00 g/mol, so 1.000 g is equal to 0.0625 mol. Nitrogen has a molar mass of 14.01 g/mol, so 0.438 g is equal to 0.0312 mol.

We then need to divide both the nitrogen and oxygen mole amounts by the smallest of the two, which is 0.0312 mol. This gives us a ratio of N:O of approximately 1:2. Therefore, the empirical formula of the compound is NO2, option b.

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Density is defined as the mass per unit volume of a substance. The formula for density is: density = mass / volume. Therefore, the density of the sample is 8 g/cm³.

Given that the mass of the material is 48 grams and the volume is 6 cubic centimeters, we can use the formula to calculate the density:

density = 48 g / 6 cm³

Simplifying the expression, we get:

density = 8 g/cm³

Therefore, the density of the sample is 8 g/cm³.

Density is a physical property of matter that describes how much mass is contained within a given volume of a substance. It is expressed in units of mass per unit volume, such as grams per cubic centimeter (g/cm³). In this example, we are given the mass of a material (48 grams) and its volume (6 cubic centimeters), and we can use the formula for density (density = mass / volume) to calculate its density. Plugging in the values, we get a density of 8 g/cm³, which means that 8 grams of the material occupy each cubic centimeter of space. The density of a material can provide important information about its properties, such as whether it will float or sink in a liquid, or how it will behave under different conditions.

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Answer:

Bicarbonate is naturally produced by the reaction of carbon dioxide (CO2) with water. (H2O) to produce carbonic acid (H2CO3), which dissociates to a bicarbonate ion and a. proton (H. + ).

55,035.5 Joules

Heat of vaporisation is the amount of energy required to transform a mole of liquid water into gas at constant temperature.

Given the following parameters:

Mass of water = 24.40 grams

ΔHvap = 40.6 kJ/mol

Determine the moles of water

Mole = mass/molar mass

Mole = 24.40/18

Mole of water = 1.356moles

Determine the required heat required

Q = mole of water * ΔHvap

Q = 1.356moles * 40.6kJ/mole

Q = 55.0355kJ

Q = 55.0355 * 1000

Q = 55,035.5 Joules

Hence joules of heat needed to completely vaporise 24.40 grams of water at its boiling point is 55,035.5 Joules

The effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.

1. The class of drugs being investigated in this study is antidepressants. They enter our waterways through excretion by individuals taking the medication, and disposal of unused medication into toilets or sinks that are connected to wastewater treatment plants.

2. C-start is an evasive maneuver that young fish use when they perceive a predator. This is important for larval fish survival because it helps them to avoid being eaten by predators.

3. In this investigation, researchers are testing two hypotheses. The first is that exposure to low levels of antidepressants can affect larval fathead minnows' behavior, and the second is that the effects of exposure will be more pronounced in fish that have been raised in a less stressful environment.

4. The researchers found that exposure to antidepressants at levels found in waterways can have a significant impact on the behavior of larval fathead minnows. Specifically, they found that the fish exposed to antidepressants were less likely to respond to the presence of predators, which could increase their risk of being eaten.

They also found that the effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.

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The specific heat of this metal is  0.385 j/g°C.

The Specific heat ability of a substance is the heat potential of a pattern of the substance divided by the mass of the sample, also sometimes called massic heat ability.

The specific warmth ability is defined as the quantity of warmth (J) absorbed consistently with the unit mass (kg) of the cloth whilst its temperature will increase 1 k (or 1 °C), and its gadgets are J/(kg k) or J/(kg °C).

Specific heat is described by the quantity of warmth had to increase the temperature of 1 gram of a substance 1 diploma Celsius (°C). Water has a high precise heat, which means it takes more power to grow the temperature of water compared to different materials.

calculation:-

heat = msΔt

s = heat/mΔt

  =  14,014 /  2,800 × 13

   = 0.385 j/g°C

Hence the specific heat of this metal is = 0.385 j/g°C

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The heat of reaction for 100.0 g of octane is -4805 kJ. Note that the negative sign indicates that the reaction is exothermic, i.e., it releases heat.

The Heat of Reaction (also known as Enthalpy of Reaction) is the change in enthalpy of a chemical reaction at constant pressure. It is a thermodynamic unit of measurement that can be used to calculate the amount of energy released or created per mole in a reaction.

To calculate the heat of reaction for 100.0 g of octane, we first need to calculate the number of moles of octane present:

Number of moles of octane = Mass / Molar mass

Number of moles of octane = 100.0 g / 114.33 g mol⁻¹

Number of moles of octane = 0.874 mol

Now, we can use the stoichiometry of the reaction to calculate the heat of reaction:

ΔrH° = (-11018 kJ / 2 mol) x (0.874 mol) = -4805 kJ

Therefore, the heat of reaction for 100.0 g of octane is -4805 kJ. Note that the negative sign indicates that the reaction is exothermic, i.e., it releases heat.

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Lithium=li

Iron=Fe

Helium=He

I don't say u must have to mark my ans as brainliest but if u think it has really helped u plz don't forget to thank me....

Answer:

lithium symbol=li helium= he and iron =i

Answer:

342g/mol

Explanation:

Molar mass of carbon=12, hydrogen=1 and oxygen=16

therefore C12H22O11=12(12)+22(1)+11(16)

=144+22+176

=342g/mol

Answer:

12. A

13. A

14. D

15. B

Explanation:

12. The 3rd law of motion is the force of our object being equal and opposite the other. If the Buller goes forward with force, the the gun recoils backwards with the same force.

13. There's nothing else described in the problem besides him getting kicked in the face

14. If you mive the oars forwards then the boat itself moves backwards

15. The gas helps push the rocket upwards since it goes downwards.

Answer:

Is an absolute temperature scale with zero at absolute zero

Answer:

1 mole H2O has 6.02 × 10^23 molecules

Explanation:

When a body of water receives an excessive nutrient load, notably phosphate and nitrogen, eutrophication takes place.

Eutrophication happens when the water body is richly supplied with nutrients. Eutrophication may be caused by a number of elements, including overuse of fertilizers, untreated sewage, the use of phosphorous-containing detergents, and industrial waste discharge.

Because of human activities, cultural eutrophication is the process that accelerates natural eutrophication. The three main sources of anthropogenic nutrient input are sewage from cities and industrial waste water, as well as erosion and leaching from fertilized agricultural areas.

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The correct balanced redox reaction for the given electrochemical cell is: Cu(s) + 2Fe3+(aq) → Cu2+(aq) + 2Fe2+(aq)

What is Redox Reaction?

A redox reaction, short for reduction-oxidation reaction, is a chemical reaction in which there is a transfer of electrons between two species. It involves the simultaneous occurrence of a reduction process (gain of electrons) and an oxidation process (loss of electrons).

In a redox reaction, one species acts as the reducing agent by donating electrons, while the other species acts as the oxidizing agent by accepting electrons.

In the given electrochemical cell, we have a platinum (Pt) electrode serving as an inert conductor. The left side of the cell is the anode, where Cu(s) (copper metal) is oxidized to Cu2+(aq) ions. The right side of the cell is the cathode, where Fe3+(aq) (iron(III) ions) are reduced to Fe2+(aq) ions. The salt bridge (represented by 'Il') allows the flow of ions to maintain charge balance.

The balanced redox reaction represents the transfer of electrons between species. In this case, copper metal loses two electrons to form Cu2+ ions, while iron(III) ions gain two electrons to form Fe2+ ions. The stoichiometric coefficients are chosen such that the number of electrons transferred is equal on both sides of the equation, ensuring the conservation of charge.

It's important to note that the Pt electrode does not participate in the redox reaction but is used as a conductor to facilitate the electron flow between the anode and cathode.

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Answer:

37%+24%+23%=84% , i wish my answer is correct

Answer:

The type of bond that holds bronze together is a metallic bond.

Explanation:

In metallic bonding, the atoms of the metal elements, in this case, copper and tin, share their valence electrons, forming a "sea" of delocalized electrons that are free to move throughout the structure. This results in a strong attraction between the positively charged metal ions and the negatively charged electron cloud, creating a cohesive force that holds the metal atoms together in a solid structure.

The  MgSO₄ (magnesium sulfate) remove water molecules entrapped in biodiesel. Ion dipole are the interactions that allow this to work.

Diesel fuel can be replaced by domestically produced, clean-burning biodiesel. The use of biodiesel as a vehicle fuel increases energy security, benefits the environment and the air we breathe, and enhances safety. Animal fats, used cooking oils, yellow grease, and vegetable oils can all be used to make biodiesel. The process of transesterification, which turns fats and oils into biodiesel and glycerin, produces the fuel. The electrostatic attraction between an ion and a dipole-containing neutral molecule produces an attractive force known as the ion-dipole force. typically located in solutions. important in particular for ionic compound solutions in polar liquids.

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Answer:

four

Explanation:

There is four

CH 4    methane

O2      oxygen

CO2    carbon dioxide

H20    water

We have that the arrangement of particles of NaCl is most ordered in a sample of

NaCl(s)  

i.e solid NaCl

From the question we are told

The arrangement of particles is most ordered in a sample of  

1. NaCl(aq)

2. NaCl(l)  

3. NaCl(g)  

4. NaCl(s)

NaCl Generally known as sodium chloride or salt exist in four main states as shown

1. NaCl(aq)

2. NaCl(l)  

3. NaCl(g)  

4. NaCl(s)

Mow in a subject of its arrangement of particles we can see that as its state changes from gaseous through to solid it gains in form and arrangement of particles

Therefore

The arrangement of particles of NaCl is most ordered in a sample of

NaCl(s)  

i.e solid NaCl

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The amount of sodium sulfide formed would be 2.18 grams..

Hydrogen sulfide and sodium hydroxide react according to the following equation:

\(2 NaOH (aq) + H_2S (g) -- > 2 H_2O (l) + Na_2S (aq)\)

Mole equivalent of 1.80 g hydrogen sulfide = 1.80/34.1 = 0.05 mol

Mole equivalent of 2.40 g of sodium hydroxide = 2.40/40 = 0.06 mol

From the equation of the reaction, the mole ratio of sodium hydroxide to hydrogen sulfide is 2:1. This means that 0.06 mol sodium hydroxide is limiting while 0.05 mol hydrogen sulfide is in excess.

The mole ratio of sodium hydroxide to sodium sulfide is 2:1. Thus, the equivalent mole of sodium sulfide produced would be:

0.06/2 = 0.03 mol

Mass of 0.03 mol sodium sulfide = 0.03 x 78 = 2.34 grams

At 93.0% yield = 0.93 x 2.34

                        = 2.18 grams

In other words, the amount of sodium sulfide formed at 93.0% yield would be 2.18 grams.

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To convert grams of X to grams of Y for a generic reaction, the following steps can be performed: 1) Write the balanced chemical equation for the reaction.

2. Calculate the molar mass of X and Y.
3. Use stoichiometry to convert grams of X to moles of X using the molar mass of X.
4. Use the mole ratio from the balanced equation to determine the moles of Y produced.
5. Convert moles of Y to grams of Y using the molar mass of Y.

Therefore, the statements consistent with these steps would include the terms "balanced chemical equation," "molar mass," "stoichiometry," "moles," and "molar mass." Convert the moles of Y obtained in step 4 to grams by multiplying by the molar mass of Y. These steps ensure accurate conversion between grams of X and grams of Y in the context of a generic reaction.

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"Select the statements that are consistent with the steps that you would perform in converting grams of X to grams of Y for the following generic reaction."

1. Determine the molar mass of X and Y: To begin, find the molar mass of X and Y using their chemical formulas and the atomic weights of the elements involved.

2. Convert grams of X to moles of X: Divide the given mass of X (in grams) by its molar mass (in grams/mol) to convert it to moles.

3. Use the stoichiometry of the reaction: Identify the mole ratio between X and Y from the balanced chemical equation. This will help you determine how many moles of Y are produced for each mole of X consumed.

4. Convert moles of Y to grams of Y: Multiply the number of moles of Y obtained in the previous step by the molar mass of Y (in grams/mol) to convert it to grams.

These steps will help you convert grams of X to grams of Y for the given generic reaction.

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Answer:

The following is the correct match:  

1. Luster refers to how the reflection of the light takes place from a mineral.  

2. Cleavage signifies a manner in which the dissociation of a mineral occurs at the time of stress.  

3. Streak helps in the identification of a true and natural color of a mineral.  

4. Color is the least reliable characteristic of determination.  

5. Hardness is determined with the application of the Mohs scale.  

The classification of the metals is;

Main group/ representative metals - Tl

Main group non metal - Se, Rn

Main group metalloid - As

Transition metal - Mo

Inner transition metal - Ru, Eu

The periodic table is a classification of elements according to their atomic numbers. We know that elements are arranged in the periodic table in order of increasing atomic numbers of the elements.

Let us now classify each element as required;

Main group/ representative metals - Tl

Main group non metal - Se, Rn

Main group metalloid - As

Transition metal - Mo

Inner transition metal - Ru, Eu

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Options 1, 5, 6, 7, and 8 are saturated fatty acids, options 2, 3, and 4 are unsaturated fatty acids. Depending on the type of oil used, Option 4 is both saturated and unsaturated fatty acids.

The presence of the double bonds with in fatty acid chain is what distinguishes saturated fat from unsaturated fat. Unsaturated fats have at least one double bond with in fatty acid chain while saturated fats have no double bond between the individual carbon atoms.

• Solid at the room temperature - Saturated fatty acid

• Liquid at room temperature - Unsaturated fatty acid

• Found primarily in plants and plant products - Unsaturated fatty acid

• Oil - Can be either saturated or unsaturated, depends on the specific type of oil

• Comes primarily from animals and animal products - Saturated fatty acid

• No double bonds within carbon backbone - Saturated fatty acid

• Trans fats are a synthetic form that has a higher melting point - Saturated fatty acid

• Double bonds within carbon backbone - Unsaturated fatty acid

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The charge of the gold ion in AuS₂ is +4.

The charge of the gold in AuS₂ can be determined by balancing the charges of the individual components. In this case, the sulfide (S) ion has a charge of -2, and there are two sulfide ions in AuS₂, so the total charge from the sulfide ions is -4. To balance this charge, the gold ion must have a charge of +4.

Therefore, the charge of the gold ion in AuS₂ is +4. This information can be used to write the balanced chemical equation for the formation of AuS₂, which would be represented as:

Au⁺⁴ + 2S⁻² → AuS₂

This equation shows that two sulfide ions with a charge of -2 are combining with a single gold ion with a charge of +4 to form the compound AuS₂.

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The plants are the part that absorb the Sun's light and heat.

The part of a food chain that absorbs the sun's light and heat is producers that are plants.

A food chain is the chain that shows the transfer of energy from one part to another.

The bottom of the food chain is the producers that make their own food, then the consumers and the decomposers.

Thus, the part of a food chain that absorbs the sun's light and heat is producers that are plants.

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We can use the ideal gas law, 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 to find the volume of H2 gas  which is 58.2 L.

To calculate the volume of H2 gas produced, we can use the ideal gas law, 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.

First, we need to determine the number of moles of Zn used in the reaction. We can do this by dividing the given mass of Zn by its molar mass. The molar mass of Zn is 65.38 g/mol.

Number of moles of Zn = 5.98 g Zn / 65.38 g/mol = 0.0915 mol Zn

According to the balanced equation, the molar ratio between Zn and H2 is 1:1. Therefore, the number of moles of H2 produced is also 0.0915 mol.

Now, we can calculate the volume of H2 gas using the ideal gas law. We need to convert the given pressure from atm to Pa and the temperature from Kelvin to Celsius.

P = 0.978 atm × 101325 Pa/atm = 99,360.45 Pa

T = 298 K

Plugging in the values: V = (nRT) / P

= (0.0915 mol × 8.314 J/(mol·K) × 298 K) / 99,360.45 Pa

= 0.0582 m³ = 58.2 L

Therefore, the volume of H2 gas collected is 58.2 L, which is approximately equal to 4.58 L

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