The Hall-He'oult process is expensive and consumes large amounts of
energy to produce __
O
Aluminum
Iron ore
O Gold
Silver
What is the answer

16.4 grams is the mass of solute in a 500 mL solution of 0.200 M .

sodium phosphate

Explanation:

Given data about sodium phosphate

atomic mass of Na3PO4 = 164 grams/mole

volume of the solution = 500 ml or 0.5 litres

molarity of sodium phosphate solution = 0.200 M

The formula for molarity will be used here to know the mass dissolved in the given volume of the solution:

The formula is

molarity = [tex]\frac{number of moles of solute}{volume in litres}[/tex]

    putting the values in the equation, we get

molarity x volume = number of moles

0.200 X 0.5= number of  moles

number of moles = 0.1 moles

Atomic mass x number of moles = mass

putting the values in the above equation

164 x 0.1 = 16.4 grams

16.4 grams of sodium phosphate is present in 0.5 L of the solution to make a 0.2 M solution.

The mass of solute in 500mL solution is 16.4 grams. The number of moles can be calculated by using Molarity formula to find Mass of the solute.

Given:

Atomic mass of Na3PO4 = 164 grams/mole

Volume of the solution = 500 ml or 0.5 litres

Molarity of sodium phosphate solution = 0.200 M

The formula for molarity will be used here to know the mass dissolved in the given volume of the solution:

Molarity = Number of solute / Volume of solution

Molarity * volume = number of moles

0.200 * 0.5= number of  moles

Number of moles = 0.1 moles

Mass= Atomic mass * number of moles

On subsituting:

164 * 0.1 = 16.4 grams

16.4 grams of sodium phosphate is present in 0.5 L of the solution to make a 0.2 M solution.

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Answer: 14.625g

Explanation:

No of moles= mass given/molar mass

No of moles given= 0.375mol

Mass is the unknown (?)

Molar mass of K= 39

No of moles = mass given/molar mass

Substitute the values

0.375= mass/39

Cross multiply

Mass = 39×0.375

Mass= 14.625g

The mass is 14.625g

Answer:

14.625g

Explanation:

Mass of a substance =number of moles of the substance × molar mass of the substance

Substance of interest is potassium, K

Given, Number of moles of K =0.375mol

Molar mass of K =39g/mol

Therefore, mass of K =0.375×39=14.625g

The question is incomplete. The complete question is:

15L tank of gas is contained at a high pressure of [tex]8.20\times 10^4 torr[/tex]. The tank is opened and the gas expands into an empty chamber with a volume of [tex]6\times 10^4 L. What is the final pressure if the temperature remains constant.

Answer: 20.5 torr

Explanation:

To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.

The equation given by this law is:

[tex]P_1V_1=P_2V_2[/tex]

where,

[tex]P_1\text{ and }V_1[/tex] are initial pressure and volume.

[tex]P_2\text{ and }V_2[/tex] are final pressure and volume.

We are given:

[tex]P_1=8.20\times 10^4torr\\V_1=15L\\P_2=?\\V_2=6\times 10^4L[/tex]

Putting values in above equation, we get:

[tex]8.20\times 10^4\times 15L=P_2\times 6\times 10^4L\\\\P_2=20.5torr[/tex]

Thus new pressure will be [tex]20.5torr[/tex]

Answer:

heat content

Explanation:

the kinetic energy , distance between molecules, and potential energy are all depending on the substance

Answer:

0.29 molL-1 or 0.29 M

Explanation:

Now we have to use the formula

n=CV

Where

n= number of moles = 0.87 moles

C= concentration of the solution (the unknown)

V= volume of the solution = 3.00L

Now having specified all parameters except the unknown (molarity if the sodium chloride solution) we can now proceed to find it.

C= n/V

C= 0.87mol/3.00L

C= 0.29 molL-1

Answer:

0.29 mol/L

Explanation:

When sodium chloride (NaCl) is dissolved in water, it will dissociates to produce sodium ion (Na+) and chloride ion (Cl-) in solution as shown below:

NaCl —> Na+ + Cl-

Next, let us calculate the molarity of NaCl. This is illustrated below:

Mole of NaCl = 0.87 mole

Volume of solution = 3 L

Molarity =?

Molarity = mole of solute /Volume

Molarity = 0.87mole /3L

Molarity = 0.29 mol/L

Therefore, the molarity of NaCl is 0.29 mol/L

Answer:

i think it is because of surface tension

Explanation:

Answer:

sample response - Surface tension is the result of water molecules pulling inward with a strong attractive force. This attractive force brings the molecules on the surface of the water close together and causes the surface of the water to be drawn toward the water molecules beneath the surface. Since there are no water molecules above the surface, there are uneven forces. This causes surface tension, allowing the coin to float on the water’s surface.

Explanation:

ywww :) from edg.

In pulling up a bucket of water, Harry uses chemical energy converted into mechanical energy, which transforms into gravitational potential energy as the bucket rises.

When Harry pulls up the bucket of water from the well using a pulley, a number of energy transformations occur. Initially, he uses the chemical energy in his body (obtained from the food he eats) to apply mechanical energy to the system (pulley and bucket). As the bucket begins to rise, the mechanical energy is transformed into gravitational potential energy. This is similar to water at a higher elevation having a higher potential energy than water at a lower elevation.

This process demonstrates a key principle in physics: energy is conserved and can be transferred or transformed from one form to another, but is never lost. So in this case, the chemical energy in Harry's muscles is converted into mechanical energy, which in turn is transformed into gravitational potential energy as the bucket is lifted higher in the well.

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Answer:

D not c

Explanation:

The point showing the laser being absorbed is D.

LASER stands for “Light Amplification by Stimulated Emission of Radiation”

Lasers not only increase the intensity of light but also generate light. Lasers emit light by stimulated emission of radiation, which increases the intensity of radiation. Some lasers produce visible light, and some produce ultraviolet or infrared rays.

The laser light exhibits some peculiar properties compared with the conventional light which make it unique.

Therefore, The point showing the laser being absorbed is D.

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Answer:

47 grams CoCl needed.

Explanation:

1 mole weight of CoCl in 1 Liter solution => 1.0 molar solution

∴ 1/2 mole weight of CoCl in 1/2 Liter solution => 1.0 molar solution.

1/2 mole weight of CoCl = 1/2(94 g/mole) = 47 grams CoCl needed.  

Final answer:

To make a 1.0 molar solution of CoCl₂ in half a liter of water, you would need 64.915 grams of CoCl₂, using its molar mass of 129.83 g/mol.

Explanation:

The question you are asking is about making a 1.0 molar solution of cobalt(II) chloride, CoCl₂, in 1/2 liter of water. To calculate the amount of CoCl₂ required, we will use the formula:

mass (grams) = molarity (mol/L) × volume (L) × molar mass (g/mol).

First, we need to establish the molar mass of CoCl₂. Cobalt has an atomic mass of about 58.93 g/mol, and each chlorine has an atomic mass of about 35.45 g/mol. So, the molar mass of CoCl₂ is:

58.93 g/mol (for Co) + 2 × 35.45 g/mol (for Cl) = 129.83 g/mol.

Now, we can calculate the required mass of CoCl₂ for a 1.0 M solution:

mass = 1.0 mol/L × 0.5 L × 129.83 g/mol = 64.915 grams.

Therefore, you would need 64.915 grams of CoCl₂ to make a 1.0 molar solution in half a liter of water.

Answer:

83.60oC per cal

Explanation:

The amount of heat required to raise the temperature of 57.8g of silver from 17.0°C to 43.5°C is 87.31 calories.

The energy required to raise the temperature of a substance can be calculated using the following formula:

Q = m × c × ∆T

Where;

Q = 57.8 × 0.057 × (43.5 - 17)

Q = 87.31calories

Therefore, the amount of heat required to raise the temperature of 57.8g of silver from 17.0°C to 43.5°C is 87.31 calories.

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Answer:

A. the atomic number

Explanation:

It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth.

Answer:

3. The rate of formation of the products must equal the rate of formation of the reactants.

Explanation:

The reaction at the equilibrium represents the rate of formation of the products that is equivalent to the rate of formation of the reactants.

It is arise at the equilibrium at the time when the amounts of reactants or products should be same. The Chemical equilibrium refers to the dynamic process that represent the rate of formation of products via the forward reaction i.e. equivalent to the rate where the products should be reform reactions via the reverse reaction.

hence, the option 3 is correct.

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Answer:

601.8mL

Explanation:

First, we'll begin by obtaining an equation connecting volume and number of mole together. This is illustrated below:

From the ideal gas equation:

PV = nRT

Divide both side by P

V = nRT/P

Now divide both side by n

V/n = RT/P

Under the same conditions simply means temperature(T), pressure (P) and the gas constant (R) are all constant i.e

RT/P => constant

Therefore, the above equation can be written as:

V1/n1 = V2/n2

Now we can solve for the final volume otherwise known as the new volume as follow:

Data obtained from the question include:

n1 (initial mole) = 0.214 mol

V1 (initial volume) = 343.4 mL

n2 (final mole) = 0.375 mol

V2 (final volume) =?

Applying the the equation V1/n1 = V2/n2, the final volume is obtain as illustrated below:

V1/n1 = V2/n2

343.4/0.214 = V2/0.375

Cross multiply to express in linear form

0.214 x V2 = 343.4 x 0.375

Divide both side by 0.214

V2 = (343.4 x 0.375)/0.214

V2 = 601.8mL

Therefore, 0.375 mol of argon gas will occupy 601.8mL under the same condition.

Answer:

V₂ =19.30 L

Explanation:

Given data:

Initial volume of gas = 29.3 L

Initial temperature = standard = 273 K

Initial pressure = standard = 1 atm

Final volume = ?

Final temperature = -23°C (-23+273 =250 K)

Final pressure = 1.39 atm

Solution:

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 1 atm × 29.3 L × 250 K / 273 K × 1.39 atm

V₂ = 7325 atm.L.K / 379.47 K.atm

V₂ =19.30 L

Answer: 3.68 x 10^21 particles

Explanation:

Based on Avogadro's law:

1 mole of any substance has 6.02 x 10^23 atoms

Since 1 mole is the same as molar mass of a substance

237 g = 6.02 x 10^23 atoms

1.45g = Z atoms

To get the value of Z, cross multiply:

(Z atoms x 237g) = (6.02 x 10^23 atoms x 1.45g)

237Z = 8.729 x 10^23

Z = (8.729 x 10^23 / 237)

Z = 3.68 x 10^21

Thus, there are 3.68 x 10^21 representative particles in 1.45 g of the molecular compound.

To find the number of representative particles in 1.45 g of a substance with a molar mass of 237 g/mol, first calculate the number of moles by dividing the mass by the molar mass, then multiply by Avogadro's number. The calculation shows there are approximately 3.69 × 10²± representative particles.

To calculate the number of representative particles in 1.45 g of a molecular compound with a molar mass of 237 g/mol, we need to use Avogadro's number and the concept of molar mass.

First, we determine the number of moles in 1.45 g:

Number of moles = mass (g) / molar mass (g/mol) = 1.45 g / 237 g/mol.

After finding the number of moles, we use Avogadro's number (6.02 × 10²³ particles/mol) to find the number of representative particles:

Number of particles = number of moles × Avogadro's number.

Therefore, we would calculate:

1.45 g / 237 g/mol = 0.0061180 moles.

Number of particles = 0.0061180 moles × 6.02 × 10²³ particles/mol.

After performing the multiplication, we find:

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Answer:

it mainly  depends what state of lithium chloride that you use to electrolysis, if you choose the aqueous state of lithium chloride then you'll have a produce of chlorine and oxygen at the anode, lithium and hydrogen is produce at the cathode but lithium will react with water to form lithium hydroxide

Explanation:

Final answer:

The electrolysis of molten lithium chloride results in the formation of lithium metal at the cathode and chlorine gas at the anode, involving the direct conversion of chemical energy into electrical energy through electrolysis.

Explanation:

The question is about describing the electrolysis of molten lithium chloride to produce lithium and chlorine gas. The process of electrolysis involves passing an electric current through molten lithium chloride (LiCl), resulting in the formation of lithium metal (Li) and chlorine gas (Cl₂). This process takes place in an electrolytic cell.

Overall reaction: 2LiCl(l) → 2Li(s) + Cl₂(g)

At the cathode: Li⁺ + e⁻ → Li(s)

At the anode: 2Cl⁻ → Cl₂(g) + 2e⁻

These reactions demonstrate the principle of electrochemistry where chemical energy is converted into electrical energy, and vice versa. The electrolysis of molten lithium chloride is an efficient way to produce pure lithium metal and chlorine gas, which have various applications in industries.

Answer:

Explanation:

MnO₄⁻ + 5 Fe2⁺ + 8H⁺ = Mn⁺² + 5Fe⁺³ + 4H₂O.

- d [MnO₄⁻ ] / dt = 4 x 10² mol /L.s.

- [ Fe²⁺ ] / dt = 5 x - d [MnO₄⁻ ] / dt

= 5 x 4 x 10² mol /L.s.

20 x 10²

- d [ H⁺] / dt = 8 x - d [MnO₄⁻ ] / dt

= 8 x  4 x 10²

= 32 x 10² mol /L.s.

+d [ Mn⁺² ] / dt = - d [MnO₄⁻ ] / dt

= 4 x 10² mol /L.s

+d [ Fe⁺³ ] / dt = 5 x - d [MnO₄⁻ ] / dt

= 20 x 10² mol /L.s

Answer:

C^6 H^1206, 602,6002, 6H ^20, 2799 AHkJ, 100g C^6 H^1206

Explanation:

Answer:

The elements which have similar behavior are Barium, strontium and beryllium.

The elements that have similar behavior are Barium, strontium, and beryllium. The correct options are A, D, and F.

Chemical elements are substances present in the periodic table. There are 118 elements in the periodic table. All elements are arranged according to the atomic numbers of the elements.

Barium, strontium, and beryllium belong to the same group of the periodic table. They are called alkaline earth metals. They are very reactive at room temperature. These metals are all white, silvery, and shiny metals.

Alkaline earth metals have two electrons in their outer shell. Which gives them the same oxidation number, which is 2+. Alkaline earth metals have beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

Thus, the correct options are A, Barium, D, Strontium, and F, Beryllium.

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Answer:

0.62 L

Explanation:

Step 1:

Data obtained from the question.

Initial Volume (V1) = 1.80 L

Initial pressure (P1) = 785 mmHg

Final pressure (P2) = 3.00 atm

Final volume (V2) =?

Step 2:

Conversion of the pressure in mmHg to atm.

It is important to express the initial and the final pressure in the same unit. Either express both in atm or in mmHg. What ever the case is, we'll still arrive at same answer. Here, we shall be converting from mmHg to atm. This is illustrated below:

760mmHg = 1atm

Therefore, 785 mmHg = 785/760 = 1.03 atm

Step 3:

Determination of the final volume. This is illustrated below.

We shall be applying the Boyle's law equation since the temperature is constant.

P1V1 = P2V2

Initial Volume (V1) = 1.80 L

Initial pressure (P1) = 1.03 atm

Final pressure (P2) = 3.00 atm

Final volume (V2) =?

P1V1 = P2V2

1.03 x 1.8 = 3 x V2

Divide both side by 3

V2 = (1.03 x 1.8) /3

V2 = 0.62 L

Therefore, the new volume of the balloon is 0.62 L

Answer:

The volume of the balloon up there will be 0.618 L

Explanation:

Given:

V₁ = 1.8 L

P₁ = 785 mmHg = 1.03 atm

P₂ = 3 atm

Question: What would the volume of the balloon up there, V₂ = ?

According the ideal gas law:

PV = nRT

However, in this case, the number of moles of helium balloon is constant. The temperature will also be assumed to be constant. Therefore, the expression of the ideal gases is as follows:

P₁V₁ = P₂V₂

Solving for V₂

[tex]V_{2} =\frac{P_{1}V_{1} }{P_{2} } =\frac{1.03*1.8}{3} =0.618L[/tex]

Answer:

0.11866M

Explanation:

molarity is mol/L

0.267 mol/2.25L = 0.1186666...

round depending on how many digits you need

Answer: im pretty sure its D

Explanation:

According to intermolecular forces of attraction, statement which best describes what happens to water during vaporization is 'B'.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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Answer: New Moon

Explanation: I Tried it on study island

Answer:

Answer: New Moon

Explanation:

In a study or experiment, the independent variable is what the researcher manipulates and the dependent variable is the response being measured. An example of this would be studying the effect of sunlight (independent variable) on plant growth (dependent variable).

In any experiment or study, the independent variable is the factor that the researcher manipulates or chooses intending to cause a change. It's the variable you have control over. The outcome of this change is observed and measured in the dependent variable. The dependent variable responds to the change you made to the independent variable. For example, if you were studying the effect of varying amounts of sunlight on plant growth. The amount of sunlight would be the independent variable (as you are controlling the amount each plant gets), and the plant growth would be the dependent variable (as you measure it after).

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Answer:

first part of the problem: temperture and volume

second part: tempture and volume

hope this helps

Explanation:

I think the answer is direct

Answer:

0.5 L

Explanation:

V1 (initial volume) = 4 L

P1 (initial pressure)  = 2.5 kPa

P2 (final pressure) = 20 kPa

V2 (final volume) = ?

Use Boyle's law  P1V1 = P2V2, to find the the final volume

P1V1 = P2V2

2.5 x 4 = 20 x V2

Divide both side by 20

V2 = (2.5 x 4)/20

V2 = 0.5 L

Answer: 0.5L

Explanation:

Using Boyle's law

P1V1=P2V2

P1= 2.5kpa

V1= 4l

V2= ?

P2= 20.0kpa

Substitute the value into this formula

P1V1=P2V2

2.5×4=20×V2

Cross multiply

2.5×4=20V2

V2= 2.5×4/20

V2= 80/2.5

V2= 0.5L

So 0.5L of gas will occupy 20.0kpa

Answer:

Any scientific theory must be based on a careful and rational examination of the facts. Facts and theories are two different things. In the scientific method, there is a clear distinction between facts, which can be observed and/or measured, and theories, which are scientists' explanations and interpretations of the facts.

Explanation:

A scientific theory is an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results.