Why is molality not temperature dependent while molarity is temperature dependent?.

Answer:

we know that it was the vinegar and baking soda because gas had been created, the gas was held within the bubbles. the gas that was created was called Carbon Dioxide or CO2

Answer: Atoms in the equation are already balanced.

Explanation:

ZnSO₄ + Li₂CO₃ ⇒ ZnCO₃ + Li₂SO₄

This appears to be a double displacement reaction.

Zn is paired with CO₃ on the right side, and Li is paired with SO₄ on the right side.

To balance this equation, we need to look at the number of each atom on both the left and right sides of the equation.

ZnSO₄ + Li₂CO₃ ⇒ ZnCO₃ + Li₂SO₄

Left side

Zn: 1

S: 1

O: 4 + 3 = 7

Li: 2

C: 1

Right side

Zn: 1

S: 1

O: 3 + 4 = 7

Li: 2

C: 1

The equation is balanced because there are the same number of each atom on the left and right sides of the equation.

The property of matter that is conserved in chemical reactions and shown by balanced equations is known as the Law of Conservation of Mass. According to this law, mass can neither be created nor destroyed in a chemical reaction; it can only be transformed from one form to another.For instance, when two substances are combined, they react and form a new substance.

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Increasing the NaCl concentration will increase the osmotic pressure.

Osmotic pressure, alongside the vapor pressure depression, freezing point depression and the boiling point elevation are the colligative properties od solution.

The direction of osmotic pressure is always from the side with the lower concentration of solute to the side with the higher concentration.

π = c(NaCl) × T(NaCL) × R

π is osmotic pressure

c is concentration of solution.

T is temperature in Kelvins.

R is universal gas constant.

Greater the concentration of sodium chloride, the greater is the osmotic pressure, because the osmotic pressure and the concentratio are in direct proportion.

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aAl + 1Fe₃O₄ ⇒ bFe + cAl₂O₃

Fe, left = 3, right = b⇒ b = 3

O, left = 4, right = 3c ⇒ c = 4/3

Al, left = a, right = 2c ⇒ a = 2c ⇒ a = 2.4/3 = 8/3

8/3Al + Fe₃O₄ ⇒ 3Fe + 4/3Al₂O₃ x3

8Al + 3Fe₃O₄ ⇒ 9Fe + 4Al₂O₃

2 C4H10 + 13 O2 → 8 CO2 + 10 H2O.

Answer:

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Explanation:

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The balanced equation = 3H2 + N2 ---> 2NH3

A.) The type of reaction represented here is a combination reaction which is exothermic

B.) The number of moles are combined in the balanced equation because both the reactant and product are the same in molar number.

The rule for balancing a chemical equations is that the number of moles of the elements in the product side must be the same with the number of moles in the reactant sides.

b.) The law of conservation of mass states that matter is neither created nor destroyed but can change from one form to another.

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The velocity profile of an incompressible fluid flowing down a vertical cylindrical pipe can be derived using the Navier-Stokes equation under certain assumptions. With a pipe length of 6 m, diameter of 5 cm, friction factor of 0.01, and a constant flow rate of 3 m³/hr, we can calculate the pressure drop using the given information.

a) To derive the velocity profile of the fluid in the pipe, we can start with the Navier-Stokes equation, which describes the motion of a fluid. Under the assumption of laminar flow and incompressibility, the equation simplifies to:

dP/dz = (32μLQ) / (πR^4)

where dP/dz is the pressure gradient, μ is the dynamic viscosity of the fluid, L is the pipe length, Q is the volumetric flow rate, and R is the pipe radius. By integrating this equation, we can obtain the velocity profile of the fluid.

b) To calculate the pressure drop, we need to convert the flow rate from m³/hr to m³/s. Given that 1 m³/hr is equal to 1/3600 m³/s, the flow rate becomes Q = 3 / 3600 m³/s. By substituting the values of μ, L, Q, and R into the derived equation, we can calculate the pressure gradient. Finally, the pressure drop can be obtained by multiplying the pressure gradient by the length of the pipe (6 m).

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because we could be sick if don't get the shot there is a higher chance to have the flu

106 ml of solvent is necessary to carry out the dilution.

Define pharmacy stocks.

Pharmaceutical stocks are the stock of larger healthcare organizations that concentrate on creating, distributing, and marketing pharmaceutical goods such medications, treatments, and vaccines.

Volume of the diluted stronger suspension

=   (volume of the diluted suspension required  x concentration of dilute suspension required) /concentration of stronger suspension

=( 275 x 25) / 65

= 106 ml.

Therefore, 106 ml of solvent is necessary to carry out the dilution.

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The correct pairing of a greenhouse gas with its primary anthropogenic source is: Methane and vehicular emissions.

The Greenhouse Effect is a naturally occurring process that is necessary for the maintenance of the planet's temperature. The sun's energy travels to Earth in the form of light. The Earth reflects some of this energy back to space while absorbing the remainder, which warms the planet.

Methane is a greenhouse gas that is released by several human activities, including fossil fuel production and use, landfills, agriculture, and livestock farming. Methane, like carbon dioxide, contributes to global warming by trapping heat in the Earth's atmosphere.

Vehicular emissions are the gases and particulate matter emitted by vehicles. They include carbon monoxide, nitrogen oxides, particulate matter, and other pollutants that are hazardous to human health and the environment.

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Answer:

C, it increases and levels out

Explanation:

acellus confirmed

Answer:

Kr-73 = 23.625 sec

Kr-74 = 10.0625 minutes (603.75 seconds)

Kr-76 = 12.95 hours (777 minutes)

Kr-81 = 1.8375 * 10^6 years

Explanation:

What you do is multiply each of those amounts by 7/8.

27 * 7/8 = 189/8 = 23.625

23/2 * 7/8 = 161/16 = 10.0625

74/5 * 7/8 = 518/40 = 259/20 = 12.95

210000 * 7/8 = 1470000/8 = 183750 = 1.8375 * 10^6

To determine the number of moles of water produced in the given reaction 2C8H18(g) + 25O2(g) → 16CO2(g) + 18H2O(g), we need to compare the stoichiometric coefficients of water (H2O) with the other reactants and products. From the balanced equation, it can be concluded that 18 moles of water are produced for every 2 moles of C8H18 consumed.

The balanced equation shows that for every 2 moles of C8H18 consumed, 18 moles of H2O are produced. This ratio is obtained by comparing the stoichiometric coefficients of water and C8H18 in the balanced equation.

Therefore, if we have a known amount of C8H18 and want to determine the corresponding moles of water produced, we can use the ratio:

moles of H2O = (moles of C8H18) x (18 moles of H2O / 2 moles of C8H18)

The ratio of 18 moles of H2O to 2 moles of C8H18 indicates that for every 2 moles of C8H18, 18 moles of H2O are produced in the reaction.

Using this ratio, you can calculate the number of moles of water produced by multiplying the number of moles of C8H18 by the ratio of 18 moles of H2O to 2 moles of C8H18.

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Answer:

2.5385 mol

Explanation:

do a quick conversion : 1 grams gold = 0.0050770041918285 mole using ...powered by AnyClip. 1 ... 500 grams gold to mol = 2.5385 mol

There are 3.61 x 10¹⁰ atoms are contained in 5.99 x 10⁻¹⁴ moles of glucose (C₆H₁₂O₆), the correct answer is (d) 3.61 x 10¹⁰

The number of atoms contained in 5.99 x 10⁻¹⁴moles of glucose (C₆H₁₂O₆) can be calculated by multiplying the number of moles by Avogadro's number (6.02 x 10²³ atoms/mole). The formula for this calculation is:

Number of atoms = Number of moles x Avogadro's number

Plugging in the given values, we get:

Number of atoms = 5.99 x 10⁻¹⁴ moles x 6.02 x 10²³ atoms/mole

Number of atoms =3.61 x 10¹⁰ atoms

Therefore, the correct answer is (d) 3.61 x 10¹⁰

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Answer: It is the number in the upper left (atomic number).

Explanation: The atomic number is normally the number of protons. I hope this helps.

Answer:

By making sense of the World around them

Explanation:

maybe?

In water, a substance that ionizes completely in solution is called strong electrolyte.

In water, a substance that ionizes totally in arrangement is known as major areas of strength for a. At the point when a substance is broken up in water, it might possibly separate into particles. On the off chance that it does, it is alluded to as an electrolyte, and in the event that it doesn't, it is known as a nonelectrolyte. Solid electrolytes ionize totally, meaning they separate into their constituent particles in arrangement, bringing about a profoundly conductive arrangement. Conversely, powerless electrolytes ionize just somewhat, bringing about a less conductive arrangement. Nonconductors don't lead power in arrangement and are typically nonelectrolytes. Understanding electrolytes and their conduct in arrangement is basic in many fields, including organic chemistry, pharmacology, and natural science.

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Answer:

B. ice and glaciers

Explanation:

The majority of total freshwater on Earth, about 68.7 percent, is held in ice caps and glaciers.

Based on the given information and the densities provided in the table, the unknown element in the alloy is most likely Beryllium. option(a)

To identify the unknown element in the alloy, we need to compare the density of the alloy with the densities of the elements listed in the table.

The density of the alloy can be calculated using the given information. We know that 10.0 grams of the alloy has a volume of 4.20 cm³. Density is defined as mass divided by volume, so we can calculate the density of the alloy as:

Density = Mass / Volume = 10.0 g / 4.20 cm³ ≈ 2.38 g/cm³

Now, we compare the calculated density of the alloy (2.38 g/cm³) with the densities listed in the table. From the given options, the closest density is that of aluminum, which is 2.70 g/cm³. The alloy's density is lower than the density of aluminum, which means it must contain an element with a lower density than aluminum.

The unknown element in the alloy is most likely Beryllium (option A) with a density of 1.85 g/cm³. The combination of 62% aluminum and 38% beryllium in the alloy would result in a density close to the calculated value of 2.38 g/cm³. option(a)

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Answer:

133.3atm

Explanation:

Given parameters:

Initial volume  = 400ft³

Final volume  = 3ft³

Initial pressure = 1atm

Unknown:

Final pressure  = ?

Solution:

To solve this problem, we  apply Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".

  Mathematically;

               P₁V₁ = P₂V₂

P and V are pressure and volume

1 and 2 are initial and final states;

   Insert parameters and solve;

                1 x 400  = P₂ x 3

                     P₂  = 133.3atm

The modified circuit can no longer boil water because: "The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates.Therefore, the correct option is D.

Electrical energy is a form of energy that results from the movement of charged particles, such as electrons. It is the energy that is transferred when an electric current flows through a conductor, and can be converted into other forms of energy, such as heat, light, or mechanical energy.

When a second load is connected, the circuit's electrical power is now split between two hot plates. Because of this, each hot plate uses less electricity and cannot produce as much heat.Therefore, the correct option is D.

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The question is incomplete, but most probably the complete question is,\

You build a circuit to power a hot plate. The hot plate can quickly heat up and boil a pot full of water. You add a second hot plate to the same circuit. Both plates heat up, but neither plate gets hot enough to boil water. Explain why the modified circuit can no longer boil water. (1 point)

A. The hot plates use electrical energy to generate heat. By adding a second hot plate, you have made an open circuit. This means the path of electricity from the energy source to the hot plates is interrupted.

B. The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, both loads must be broken.

C. The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, the energy source of the modified circuit must be broken.

D. The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates. This means each hot plate receives less electrical energy and cannot generate as much heat.

The conclusion the student that the colorless liquid that was added to anhydrous copper {ii} sulfate which turned blue is pure water because anhydrous copper {ii} sulfate does not react with pure water.

A sample of anhydrous copper(II) sulfate becomes blue when water is present.

In the absence of water, it is also known as anhydrous copper(II) sulfate and is colorless.

When water molecules are added to anhydrous copper {ii} sulfate, the individual water molecules are held within the ionic lattice surrounding the copper(II) ions, it is still a dry solid resulting in the formation of blue hydrated copper {ii} sulfate.

This reaction does not occur with pure water.

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The total bond energy of the reactants and products must be subtracted to obtain the energy change in the reaction \(2H_2O --- > 2H_2 + O_2\) using the provided bond energy.

Reactants:

2H-O-H (2 molecules) = 2 * (2 * O-H) = 2 * (2 * 463 kJ/mol) = 1852 kJ/mol

Products:

2H-H (2 molecules) = 2 * (2 * H-H) = 2 * (2 * 436 kJ/mol) = 1744 kJ/mol

O=O = 1 * O=O = 1 * 495 kJ/mol = 495 kJ/mol

1852 kJ/mol is the total binding energy of the reactants.

The combined binding energy of the products is 1744 kJ/mol + 495 kJ/mol, which is equal to 2239 kJ/mol.

Energy change (ΔE) = Total bond energy of the products - Total bond energy of the reactants

ΔE = 2239 kJ/mol - 1852 kJ/mol = 387 kJ/mol

So, the answer is E.

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Your question is incomplete, most probably the complete question is:

Calculate the energy change of the following reaction

based on the bond energies given.

2H2O2H2 + O2

H-H: 436kJ/mol

O=0: 495kJ/mol

O-H: 463kJ/mol

Select one:

A 14.0-g sample of sodium sulfate is mixed with 405 g of water. 0.243 mol/kg is the molality of the sodium sulfate solution.

To find the molality of the sodium sulfate solution, we first need to calculate the number of moles of sodium sulfate present in the solution.

The capacity to direct one's attention and mental energy on a particular task or activity is known as concentration. Distractions must be eliminated, and focus must be maintained on the work at hand. Concentration is a crucial component of productivity and can facilitate more effective goal achievement. Lack of focus can result in mistakes, missed deadlines, and poor performance. A variety of strategies, including maintaining a calm and orderly workspace, dividing large activities into smaller, more manageable chunks, taking breaks, and refraining from multitasking, might assist increase attention.
The molar mass of sodium sulfate is 142.04 g/mol (22.99 + 32.06 + 15.99x4), so the number of moles of sodium sulfate in the sample is:
14.0 g / 142.04 g/mol = 0.0985 mol
Next, we need to calculate the mass of solvent (water) in kilograms:
405 g = 0.405 kg
Finally, we can calculate the molality of the solution using the formula:
molality = moles of solute / mass of solvent in kilograms
molality = 0.0985 mol / 0.405 kg = 0.243 mol/kg
Therefore, the molality of the sodium sulfate solution is 0.243 mol/kg.

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The enthalpy of the reaction is 14 J/mol.

The enthalpy of a reaction (ΔH) is the amount of energy transferred between a system and its surroundings during a chemical reaction at constant pressure, measured in joules per mole (J/mol). This value is important because it can tell us whether a reaction is exothermic or endothermic, as well as give us information about the strength of chemical bonds within the reactants and products.To calculate the enthalpy of a reaction, we need to know the amount of energy released or absorbed (Q) and the number of moles of the compound involved in the reaction (n). We can use the equation:
ΔH = Q/n
Given that 6 moles of a compound produce 84 J of energy, we can calculate the enthalpy of the reaction as follows:
ΔH = Q/n
ΔH = 84 J / 6 mol
ΔH = 14 J/mol
This means that for every mole of the compound involved in the reaction, 14 J of energy is transferred between the system and the surroundings. Since the value is positive, we can conclude that the reaction is endothermic, meaning that it requires an input of energy to occur.It is worth noting that the enthalpy of a reaction can depend on a number of factors, such as temperature, pressure, and the specific conditions under which the reaction occurs. As such, it is important to take these factors into account when calculating or predicting enthalpy values.

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