One way of purifying gaseous H2 is to pass it under high pressure through the holes of a metal's crystal structure. Palladium, which adopts a cubic closest packed structure, absorbs more H2 than any other element and is one of the metals currently used for this purpose. Although the metal-hydrogen interaction is unclear, it is estimated that the density of absorbed H2 approaches that of liquid hydrogen (70.8 g/L). What volume (in L) of gaseous H2, measured at STP, can be packed into the spaces of 1 dm3 of palladium metal

Answers

Answer 1

Answer:

[tex]V=795.26L[/tex]

Explanation:

From the question we are told that:

Volume [tex]V=1dm^3=>1L[/tex]

Density [tex]\rho=70.8g/L[/tex]

Generally the equation for Density is mathematically given by

[tex]\rho =\frac{Mass}{Volume}[/tex]

Therefore

[tex]M=\rho*V[/tex]

[tex]M=70.8*1[/tex]

[tex]M=70.8g[/tex]

Since at STP

[tex]T=273K[/tex]

[tex]P=1atm[/tex]

[tex]Mass =70.8g[/tex]

Therefore

[tex]Moles\ of\ Hydrogen=\frac{Mass}{2g}[/tex]

[tex]Moles\ of\ Hydrogen=\frac{70.8}{2g}[/tex]

[tex]Moles\ of\ Hydrogen=35.4moles[/tex]

Generally the equation for Ideal gas is mathematically given by

[tex]PV=nRT[/tex]

Therefore

[tex]V=\frac{nRT}{P}[/tex]

[tex]V=\frac{35.4*0.0826*273}{1}[/tex]

[tex]V=795.3L[/tex]


Related Questions

what do you mean by thick pile of volcanic materials??

Answers

Answer:

You should repent God is coming back soon

Why are measurements important for science?
Give two reasons.
Please help meeee :(

Answers

Answer:

-Being in the service of quality, safety, designing and problem solving.

-It plays an importnat part in our lives too, to measure any surface, object, etc.

Explanation:

Measurement is perhaps one of the most fundamental concepts in science. Without the ability to measure, it would be difficult for scientists to conduct experiments or form theories.

The reaction of an alkene and water in the presence of an acid catalyst to produce an alcohol is called ________.

Answers

The answer I believe is Hydration

Which phrase best describes a Hawaiian eruption?
A. Slow-moving lava flows and explosions of pumice
B. Ash shooting high into the atmosphere
C. Fast-moving lava flows and explosions of cinder
D. Lava fountains and fissure eruptions

Answers

Answer:

C.faste-moving lava flows and explosion of cinder

Balance the equation for
__Ca+__Pb(NO3)2—__Pb+__Ca(NO3)2

Answers

Answer:

Ca + Pb(NO3)2 → Pb + Ca(NO3)2

Explanation:

This is an oxidation-reduction (redox) reaction:

PbII + 2 e- → Pb0

(reduction)

Ca0 - 2 e- → CaII

(oxidation)

Pb(NO3)2 is an oxidizing agent, Ca is a reducing agent.

why are metal containers not used for storing acids​

Answers

I’m pretty sure they are, but it depends on which acids. Some acids have a really high or low ph that can burn through items, like our stomach acid. Instead, something with a high melting point would be used.
Answer:

Metal containers are not used for storing acid because most of the time acid reacts with almost every metal and produces salts or oxides which alters the acid characteristics making it useless....

Which of the following happens during an endothermic chemical change?

Heat is absorbed.
Heat is released.
Net energy decreases.
Net energy remains constant.

Answers

Answer:

Heat is absorbed.

Explanation:

Endothermic reactions: Heat is absorbed.

When there is a change in the endothermic chemical so here heat is absorbed.

What are Endothermic reactions?

It is the type of the chemical reaction that absorbed the heat from the environment. The absorbed energy that gives the activation energy for the reaction to arise.

hence, When there is a change in the endothermic chemical so here heat is absorbed.

Therefore, the first option is correct.

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Si 40 g de un compuesto C6H10O5 se disuelven en 500 g de agua, determine el punto de ebullición de esta solución. (Agua: temperatura de ebullición 100 °C y Ke = 0,52 °C/m)

Answers

The question is: If 40 g of a compound C6H10O5 are dissolved in 500 g of water, determine the boiling point of this solution. (Water: boiling temperature 100 ° C and Kb = 0.52 ° C / m).

Answer: The boiling point of given solution is [tex]100.256^{o}C[/tex].

Explanation:

Given: Mass of solute = 40 g

Mass of solvent = 500 g (1 g = 0.001 kg) = 0.5 kg

[tex]K_{b} = 0.52^{o}C/m[/tex]

Molality is the moles of solute present in kg of solvent.

Moles is the mass of substance divided by its molar mass. Hence, moles of [tex]C_{6}H_{10}O_{5}[/tex] (molar mass = 162.141 g/mol) is calculated as follows.

[tex]Moles = \frac{mass}{molar mass}\\= \frac{40 g}{162.141 g/mol}\\= 0.246 mol[/tex]

Now, molality of the solution is calculated as follows.

[tex]Molality = \frac{molesof solute}{mass(in kg)}\\= \frac{0.246}{0.5 kg}\\= 0.492 m[/tex]

The boiling point is calculated as follows.

[tex]\Delta T_{b} = K_{b}m[/tex]

where,

m = molality

Substitute the values into above formula as follows.

[tex]\Delta T_{b} = K_{b}m\\= 0.52^{o}C/m \times 0.492 m\\= 0.256^{o}C[/tex]

As the boiling point of water is 100 degree Celsius. So, the boiling point of solution is as follows.

[tex](100 + 0.256)^{o}C\\= 100.256^{o}C[/tex]

Thus, we can conclude that the boiling point of given solution is [tex]100.256^{o}C[/tex].

How many O2 molecules react with 47 CH4 molecules according to the preceding equation CH4 + O2 → CO2 + H2O

Answers

I think 93.71 mol.
You need to use stochio

What type of a liquid will have a pH value equal to 7? (1 point)

Answers

The answer is pure water.

This is because the pH value 7 is neutral and water is a neutral solution. Anything less than exactly 7 is considered acidic and anything more is considered basic.
The answer is pure water

define all the physical features of earth​

Answers

The features discussed are: Plateaus, deserts, deltas, mesas, basins, foothills, marshes, and swamps. Plateaus are elevated regions that are flat on top. Deserts are large areas that receive less than 10 inches of precipitation a year. Antarctica is the world's largest desert.Geography Landforms & Physical Features. Our Earth is made up of a many different types of landforms. ... Mountains. Mountains are large, tall, and elevated land areas on the earth's surface that rise abruptly from the surrounding land area. .

hope it helpsstay safe healthy and happy.....

MOUNTAINS

Mountains are large, tall, and elevated land areas on the earth's surface. They have steep, sloping sides and sharp or rounded ridges, and a high point, called a peak.

PLAINS

Plains are one of the major landforms on earth. They are areas of flat lands.

PLATEAUS

A plateau is a flat, elevated landform that rises above the surrounding area.

DESERTS

Regions of dry, arid lands.

DELTAS

A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water.

Locations Cost of land Cost of equipment Cost of mining and reclamation Time taken to mine the area 1 $100,000 $10,000 $5,000 per day 30 days 2 $35,000 $6,000 $4,500 per day 45 days 3 $30,000 $7,500 $3,500 per day 120 days 4 $40,500 $8,000 $7,000 per day 65 days Considering all costs, which location will cost the least to the company to mine?

Answers

Answer:

Location 2 will cost the least to the company to mine.

Explanation:

a) Data and Calculations:

Locations  Cost of land     Cost of       Cost of mining      Time taken to

                                        equipment   and reclamation    mine the area

1                 $100,000      $10,000         $5,000 per day        30 days

2                 $35,000       $6,000          $4,500 per day        45 days

3                 $30,000       $7,500          $3,500 per day       120 days

4                 $40,500       $8,000          $7,000 per day        65 days

Locations  Cost of land     Cost of       Cost of mining                      Total

                                        equipment   and reclamation                    Costs

1                 $100,000      $10,000         $150,000 ($5,000 * 30)  $260,000

2                 $35,000       $6,000         $202,500 ($4,500 * 45)   $243,500

3                 $30,000       $7,500         $420,000 ($3,500 * 120)  $457,500

4                 $40,500       $8,000         $445,000 ($7,000 * 65)   $503,500

Una muestra de S2 (g) se coloca en un recipiente rígido vacío a 800 K y ésta ejerce una presión inicial de 0,92 atm, luego se combina para formar S8 (g) mediante la reacción: S2 (g) ⇆ S8 (g) Una vez alcanzado el equilibrio, la presión parcial de S2 (g) ha disminuido a 0,18 atm. Calcule Kp para la reacción a esta temperatura

Answers

Answer:g

Explanation:

The reaction from NaOH and CH3COOH gives
a. Basic Salt
b. Acidic Salt
c. Normal Salt
d. Neutral Salt​

Answers

Acidic acid will react with sodium hydrogen oxide and 80H to procedure of sodium acetate and water the imbalance chemical equation that describes this neutralization reaction

In an electrically neutral atom, the number of
protons equals the number of neutrons.
protons equals the number of electrons.
neutrons equals the number of electrons.

A. Protons equals the number of neutrons
B. Protons equal the number of electrons
C. Neutrons equals the number of electrons

Answer: B

Answers

Answer:

B

Explanation:

because protons have a +1 charge and electrons have a -1 charge, so if an atom is neutral it must have the same amount of protons and neutrons

Yes I believe the correct answer is B

Help me please I really need this tomorrow

Answers

19. place moth balls in the closet and observe after several days.

20. whenever wax or a candle burns it turns from solid to liquid but again at room temperature it turns to solid

21. evaporation, condensation, precipitation

22. it produces new substances

23. vinegar Bubbles when baking soda is added

24. steam

how does liquid carbon dioxide connect to organic chemistry
please I need long answers

Answers

Carbon dioxide can’t exist in three states; Gas, Liquid & Solid. At normal temperatures and pressures, CO2 is colorless with a slightly pungent odor at high concentrations. If compressed and cooled to proper temperature the gas liquifies. Solid CO2, (dry ice) sublimates back to the natural gaseous state.

1.25 X 10^24 molecules of chlorine gas react with sodium to form how many grams of sodium
chloride?
2Na + Cl2
--> 2NaCl

Answers

Answer:

241.28 g NaCl(s)

Explanation:

Given 1.25 x 10²⁴ molecules of Cl₂ = 1.25 x 10²⁴molecules Cl₂(g)/6.023 x 10²³ molecules/mole = 2.08 mole Cl₂(g)

2Na(s)    +      Cl₂(g)      =>   2NaCl(s)

excess        2.08mole          ? mole

∴moles NaCl(s) formed from 2.08 moles Cl₂(g) = 2(2.08 mole NaCl(s))

= 4.16 mole NaCl(g) = 4.16 mole NaCl(s) x 58 g NaCl(s)/mole NaCl(s) = 241.28 g NaCl(s)  

a) The bubbles must be negatively charged.
b) The bubbles must be positively charged.
c) The bubbles must have the opposite charge to the charge on the student.
d) The bubbles must have the same charge as the charge on the student.

Answers

Answer:

C

Explanation:

like charges repel each others so if they have the same charge they will move away from each other

Two magnets are stuck together. What might you have to do to get them to separate?

Answers

Explanation:

The easiest method to separating magnets is to slide them apart. When separating magnets keep in mind shear force. Magnets are measured on pull strength, so are up to five times easier to move if they are pushed apart instead of pulled apart. Small magnets slide relatively easily, even without spacers.

Firmly slide them away from each other and far enough apart so that they don't hop back together. Neodymium magnets are quite strong.

What are properties of a magnet?

The properties of the magnet are:

Magnets will attract ferromagnetic.Like poles of the magnet repel each other and unlike poles bait each otherThe poles of the magnet are in the team.

Thus,  slide them away from each other and far enough apart so that they don't hop back together.

To learn more about magnets  click here:

https://brainly.com/question/13026686

the representative particle for KBr is the?​

Answers

Answer:

This is a chemical symbol for Potassium Bromide

If you refuse a legal chemical test issued by a law enforcement officer, the Division of Motor Vehicles is required to:

Answers

Answer: Revoke the driver's license for at least 12 months

Explanation:

Chemical tests are used in order to measure the amount of drugs or alcohol that is in the body of a person when the person was arrested. To do this, samples of the urine or blood of the person can be taken and the result will be used to know if the person was driving under the influence of alcohol or not.

If the person refuse a legal chemical test issued by a law enforcement officer, the Division of Motor Vehicles is required to revoke the the driver's license of the person for at least 12 months.

balance the following half equation. SO3^2- ➡️SO4^2-​

Answers

Answer:

[tex]12H2O + 2(SO3)2 -> 3(SO4)2[/tex]

Explanation:

see below. This was balanced using the the aggregate redox species method, or ARS for short.

The balanced half equation of the given reaction can be written as:

[tex]SO_3^{2-} + H_2O \longrightarrow SO_4^{2-} +2H^+ +2e^-[/tex]

What is the balanced chemical equation?

A chemical equation can be defined as the expression of a reaction in terms of chemical symbols of the elements. A chemical equation of the reaction involves reactants and formed products.

The chemical equation of the reaction in which the number of atoms of the elements is the same on both sides of the chemical equation is a balanced chemical equation.

According to the law of conservation of mass, the total mass of the elements on the reactant side and product side should be the same in a balanced equation.

Given the equation is  SO₃²⁻  →  SO₄²⁻

To balance the oxygen on both sides add water:

H₂O + SO₃²⁻  →  SO₄²⁻

To balance the hydrogen on both sides add H⁺:

H₂O + SO₃²⁻  →  SO₄²⁻ + 2H⁺

To balance the charges, add electrons:

H₂O + SO₃²⁻  →  SO₄²⁻ + 2H⁺ + 2e⁻

Learn more about the balanced chemical equation, here:

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#SPJ2

Which of the compounds listed below would be considered ionic?

options:

NO2
­­P4S3
NiCl2
SO3
Nothing listed can be classified as an ionic substance.

Answers

Answer:

NICL2 are classified as an ionic substance

What does binding energy measure?
A. The forces attracting electrons to a nucleus
B. The repelling forces pushing protons apart
C. The energy used to hold the nucleus together
D. The energy released in radioactive decay

Answers

Answer:

C. the energy used to hold the nucleus together

As Danny was pouring cereal for his breakfast, he noticed that the cereal box says that the cereal contains 5 milligrams of iron per serving. Danny decided to perform an experiment to test this claim. He found that the cereal contains 4.6 milligrams of iron per serving. Based on Danny's measurement, the value reported on the label is because .

Answers

The question is incomplete, the complete question is;

As Danny was pouring cereal for his breakfast, he noticed that the cereal box says that the cereal contains 5 milligrams of iron per serving. Danny decided to perform an experiment to test this claim. He found that the cereal contains 4.6 milligrams of iron per serving. Based on Danny's measurement, the value reported on the label is ( CORRECT OR INCCORECT) because A: (IT IS DIFFERENT FROM THE VALUE DANNY MEASURED) B: (IT IS REORTED TO THE NEAREST MILLIGRAM) C: (IT USES THE SAME UNITS THAT DANNY USED).

Answer:

CORRECT because IT IS REORTED TO THE NEAREST MILLIGRAM

Explanation:

In mathematics, values may be rounded up or down as required. In the case of this measurement of cereals by Danny, it is customary to measure the amount of iron per serving to the nearest milligram.

As such, even though Danny found out that the actual amount of iron per serving in the cereal is 4.6 milligrams, the value reported on the cereal box is still correct because it was reported to the nearest milligram hence the value had to be rounded up.

Explain the sharing of electrons between a water molecule that forms four hydrogen bonds with the other four water molecules

Answers

Answer:

The sharing of electrons between a water molecule that forms four hydrogen bonds with the other four water molecules:

Explanation:

The hydrogen bond is a weak electrostatic force of attraction that exists between a covalently bonded H-atom and a highly electronegative atom like N,O or F.

In the case of the water molecule,

the highly electronegative atom is Oxygen and the intermolecular hydrogen bond in water is as shown below:

Thus H-bond is a weak electrostatic attraction formed between H-atom and O-atom in water.

Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0012 % Pb by mass. What volume of the water in milliliters contains 100 mg of Pb

Answers

Answer:

8.3 × 10³ mL

Explanation:

Step 1: Calculate the mass of water that contains 100 mg of Pb

The concentration of Pb in the sample is 0.0012% by mass, that is, there are 0.0012 g of Pb every 100 g of water. The mass of water that contains 100 mg (0.100 g) of Pb is:

0.100 g Pb × 100 g Water/0.0012 g Pb = 8.3 × 10³ g Water

Step 2: Calculate the volume corresponding to 8.3 × 10³ g of water

Since the solution is diluted, we will assume the density of the sample is equal than the density of water (1 g/mL).

8.3 × 10³ g × 1 mL/1 g = 8.3 × 10³ mL

The volume of the water in milliliters contains 100 mg of Pb is;

V =  8.3 × 10³ mL

Volume of Solution

We are given the concentration of Pb in the sample as 0.0012% by mass.

That means that there are 0.0012 g of Pb in every 100 g of water.

Thus, the mass of water that contains 100 mg (0.100 g) of Pb is calculated as;

(0.100 g Pb × 100 g of Water)/0.0012 g of Pb = 8.3 × 10³ g of Water

Now, we know that the density of water (1 g/mL) but we are not given the density of the sample.

Thus, since the solution is diluted we can equally say that;

Density of sample = 1 g/mL

Formula for Volume is;

V = mass/density

Thus;

V = 8.3 × 10³ g/1 g/mL

V = 8.3 × 10³ mL

Read more about Volume of solution at; https://brainly.com/question/17055828

Arrange Cu, Ca, Na, Zn and Au on the basis of their decreasing reactivity.​

Answers

Answer:

1. Sodium (Na) is the most reactive due to its lower number of shells which enables the protons in it's nucleus to attract more electrons.

2. Calcium (Ca) is next as it is a group 2 element and they can be quite reactive.

3. Zinc (Zn) is the third reactive as transition metals are not very reactive.

4. Copper (Cu) is less reactive than Zinc because it is closer to the center of the periodic table and therefore has more stability.

5. Gold (Au) is the least reactive.

Read the temperatures shown to the nearest 0.5°C.
I’ll mark you as brainlister

Answers

Answer:

The temperature to the nearest 0.5°C is 98.5°C

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