What is the number of moles in 825l of he gas at stp?

17.28 moles of  Cl atoms are present in 4.32 moles of CC14.

we have given data in the statement

4 Cl atoms in CC14.

then moles of Cl in CC14 =  4.32×4 = 17.28 moles

The mole idea is a useful way to indicate how much of a substance there is. Even one gram of a pure element is known to have an enormous number of atoms when working with particles at the atomic (or molecular) level. The mole idea is frequently applied in this situation. The unit of measurement that receives the most attention is the "mole," which is a count of a sizable number of particles.

Popularly known as the Avogadro constant, the quantity 6.02214076*10^23 is frequently represented by the letter "NA". Atoms, molecules, monoatomic and polyatomic ions, as well as other particles, are examples of the elementary entities that can be represented in moles (such as electrons).

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The pressure (in mmHg) of O₂, given that CO₂ has a pressure of 560 torr is 222.8 mmHg

We'll begin by converting 1.03 atm to torr. This can be obtained as follow:

1 atm = 760 torr

Therefore,

1.03 atm = (1.03 atm × 760 torr) / 1 atm

1.03 atm = 782.8 torr

Next, we shall determine the pressure of O₂. This can e obtained as follow:

Total pressure = pressure of CO₂ + pressure of O₂

782.8 = 560 + pressure of O₂

Collect like terms

Pressure of O₂ = 782.8 - 560

Pressure of O₂ = 222.8 torr

Finally, we shall convert 222.8 torr to mmHg. This is illustrated below

Recall

760 torr = 760 mmHg

Therefore,

222.8 torr = 222.8 mmHg

Thus, we can conclude that the pressure of O₂ is 222.8 mmHg

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Competitive inhibitors - Binds to the enzyme in place of substrate by competing against the substrate

Non-competitive inhibitors - Binds to other position than the active site and blocks the activation of the enzyme without competing against the substrate

The mutations could change the shape of the binding site of non-competitive inhibitor thus preventing the binding.

Enzymes are proteins that could be activated if a substrate attaches itself to the receptor of the enzyme like a lock and key. The shape of the substrate should fit the receptor in the enzyme to activate it.  

Inhibitors are structures similar to the substrate. It prevents the activation of the enzyme.

Competitive inhibitors are structures that binds to the enzyme in place of substrate i.e., it competes with the substrate to attach itself to the enzyme.

Non-competitive inhibitors are structures that does not compete with the substrate. In an enzyme, there may be more than one binding site. The non-competitive inhibitor would attach to other position and blocks the activation of the enzyme.

Mutations can change the structure of the molecule and thus the function. The mutations could change the shape of the binding site of non-competitive inhibitor thus preventing the binding. This would result in resistance of the enzyme with non-competitive inhibitor.  

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Answer:

It's function is to remove wastes from the body

Explanation:

These wastes include water, carbon dioxide, nitrogen, salts, and heat. Metabolism: The process of the body converting food into energy. As a result, there are waste products.

The IUPAC name of the compound given in the question is 2,2,3-trimethylpentane

The naming of organic compounds has been made easier, owning to the the rules of the international union of pure and applied chemistry (IUPAC).

The IUPAC naming of organic compounds can be obtained by following these steps:

With the above information in mind, we can name the compound as follow:

Thus, the IUPAC name of the compound is:

2,2,3-trimethylpentane

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The molar mass is 126.75 g/mol.

From the Periodic Table of Elements we can find the atomic mass of Fe and Cl:

- Fe atomic mass: 55.85 g/mol

- Cl atomic mass: 35.45 g/mol

So, the sum of their masses for a single FeCl2 molecule is:

1 Fe atom + 2 Cl atoms

1 x 55.85 g/mol + (2 x 35.45 g/mol)

55.85 g/mol + 70.9 g/mol

126.75 g/mol

So, the molar mass for a single FeCl2 molecule is 126.75 g/mol.

Answer:

222.2cm^2?

Explanation:

cos volume equals mass divided by density

Answer 2:

Therefore, Earth is in two types of motion-

Answer 3:

Answer 4:

Answer 5:

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The relation between %TDS coffee and refractive index is given by the formula:

np = 0.00175 (% TDS Coffee) + 1.3342

In the given case

np = 1.3384

So, substituting the value of np in the equation above, we get:

1.3384 = 0.00174 (%TDS Coffee) + 1.3342

⇒ 1.3384 - 1.3342 = 0.00174 (%TDS Coffee)

⇒ 0.0042 = 0.00174 (%TDS Coffee)

⇒ (%TDS Coffee) = 0.0042/0.00174

⇒ %TDS Coffee = 2.4137

Hence the value of %TDS Coffee is 2.4137

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ANSWER

The usual oxidation state of lithium is +1

EXPLANATION

Lithium is a group 1 metal with an atomic number of 3. Its electronic configuration of lithium atom is written below as

In the above configuration, lithium has one electron in its outermost shell. Hence, the valence of electron is 1

During chemical reaction, lithium will lose an electron to attain it octet structure and it will attain the electronic configuration of Helium

Since it will be losing one electron, therefore it usual oxidation number is +1u

Answer:

Na2SO4

Explanation:

Na+ has +1 charge

(SO4)-2 has -2 charge

so it takes 2 Na+ to balance 1 (SO4)-2

therefore Na2SO4

Answer:

3. 175000 ml
5. 622 cl
7. 1570 ml
9. 440000 l
11. 327 kl
13. 204 kl
15. 8.943 cl
17. 696 kl
19. 287.000046 kl
23. 641 kl
25. 436000 l
Unfortunately, i couldn't read any other problems, only 3 through 25 (with 21 not being a problem)

Explanation:

The conversion units are:
1 ml = 1 ml
10 ml = 1 cl
100 ml = 1 dl (dl meaning deciliter)
1000 ml = 1 l
1 l = 1 l
10 l = 1 decaliter
100 l = 1 hl (hectoliter)
1000 l = 1 kl

For example, if i had 123 l and i wanted to convert it into ml. since 1 l equals 1000 ml, and 2 l equals two times 1000 ml would be 2000 ml, 123 l would equal 123 times 1000 ml which would be 123000 ml.

From the method of half-reactions, the balanced equation of the reaction is given below:

Eight electrons were transferred.

Half reactions are reactions that show the processes of oxidation and reductions that occur in a redox reaction as separate or individual reactions.

The half-reactions of the given equation are as shown below:

Oxidation:

Unbalanced -  S₂O₃²⁻ (aq) + H₂O (l) ---> SO₄²⁻ (aq) + H⁺ (aq)

Balanced - S₂O₃²⁻ (aq)  + H₂O (l) ---> 2 SO₄²⁻ (aq)  + 8 e⁻  + 2 H⁺ (aq)

Reduction:

Unbalanced - Cl₂ ---> Cl⁻

Balanced - 4 Cl₂ (g) + 8 e⁻ ---> 8 Cl⁻ (aq)

Overall balanced equation:  S₂O₃²⁻ (aq)  + H₂O (l) + 4 Cl₂ (g)  ---> 2 SO₄²⁻ (aq) + 2 H⁺ (aq) + 8 Cl⁻ (aq)

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Answer:

6

Explanation:

Answer:

A. 0.49 g/cm3

B. Yes

Explanation:

Volume of wood = 3 x 6 x 9 = 162 cm3

d = m/V = 80.0/162 = 0.49382716049 = 0.49 g/cm3

Since density of water is 1 g/cm3, density of wood is less so it will float in water.

Both superficial and deep infiltration of water into the soil are possible. The soil receives the moisture it needs from shallow penetration to maintain the plants and trees mentioned above. Additionally, shallow infiltration may penetrate the soil and enter lakes and rivers further downstream.

After precipitation, water can enter the water cycle through two different processes: runoff and infiltration. Infiltration is water that seeps into the soil, whereas runoff is water that flows across the land's surface. Large amounts of water are moved via runoff across the Earth's surface, finally ending up in lakes and oceans.

The process of evaporation turns liquid water into gaseous water (water vapor). Evaporation is how water gets from the surface of the Earth to the atmosphere. Evaporation results from the dissolution of the bonds holding the water molecules together as a result of heat energy.

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EXPLANATION

What are indicators; Chemical indicators are a substance that gives a visible sign of the presence or absence of a required concentration of a chemical substance.

Examples of indicators are; litmus paper, methyl orange, phenolphthalein

The mass of 2,301 grams of sodium in ounces is 0.0811757609 ounces.

The amount of sodium recommended by American heart association is 2301 mg. This limit should not be crossed in a day.

We have to convert Mass of sodium from mg to ounces.

We know,

1 ounce = 28.3459 grams.

We also know,

1 gram = 1000 milligrams.

So,

28.3459 grams = 28.3459 x 1000 milligrams.

28.3459 grams = 28345.9 milligrams.

1 ounce = 28345.9 mg.

1 mg = 1/28345.9 ounces

Weight of sodium 2301mg in ounces,

2301mg = 2301/28345.9 ounces

Dividing till last significant figure,

2301 mg = 0.0811757609 ounces.

Mass of sodium in ounces is 0.0811757609.

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The mass of CO₂ that would be required to react with 84.6g of LiOH in the following reaction would be 77.5g

According to the given reaction,

CO₂(g) + 2LiOH(g) --- Li₂CO₃ + H₂O(g)

? (84.6g)

As we know,

(mole of CO₂/coefficient) = (mole of LiOH/coefficient)

mole of CO₂/1 = (84.6/Molecular weight÷2)

(mass of CO₂/molecular weight of CO₂) = (84.6/molecular weight of LiOH÷2)

mass of CO₂/44 = 84.6/48

mass of CO₂ = 77.5g

Therefore, mass of CO₂ = 77.5g

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The mass of water produced when 6.26g of butane reacts with excess of oxygen will be 9.78g.

According to given question, the reaction would be:

C₄H₁₀ + 13/2O₂ --- 4CO₂ + 5H₂O

6.26g 0 0

As we know,

(mole of C₄H₁₀)÷coefficient = (mole of H₂O)÷coefficient

6.26/molecular weight ÷ 1 = mass of H₂O/molecular weight ÷ 5

6.26÷58 = Mass of H₂O/18×5

Mass of H₂O = 9.78g

Therefore, the mass of water produced when 6.26gram of butane reacts in the presence of excess of oxygen will be 9.78gram.

The combustion of butane is a reaction between butane and oxygen gas that leads to the production of carbon dioxide gas and water. This hydrocarbon combustion reaction releases heat energy and is an example of an exothermic reaction.

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A sample of gas has an initial volume of 8.90 L at a pressure of 825 mmHg. If the volume of the gas is increased to 14.7 L, what is its pressure (in atm) is  0.65 atm.

According to boyle's law , we have

P1 V1  = P2 V2

P2 = (P1 V1 ) / V2

given that :

initial volume V1 = 8.90 L

pressure P1 = 825 mmHg = 1.08 atm

volume V2 = 14.7 L

solving the values in the formula , we get

P2 = (P1 V1 ) / V2

P2 = ( 1.08 × 8.90 ) / 14.7

P2 = 9.612 / 14.7

P2 = 0.65 atm

Thus, A sample of gas has an initial volume of 8.90 L at a pressure of 825 mmHg. If the volume of the gas is increased to 14.7 L,  its pressure in atm is  0.65 atm.

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There are 2.08 x 10¹⁸ photons/sec.

Wave energy:

E = nhc/λ

3000 = (n x 6.63 x 10⁻³⁴ x 3 x 10⁸)/(510 x 10⁻⁹)

n = 7.69 x 10²¹ photons/sec/m²

2.70 cm² = 2.70 /10,000 m²

= 2.7 x 10⁻⁴

photons/sec = 7.69 x 10²¹ x 2.7 x 10⁻⁴

= 2.08 x 10¹⁸ photons/sec.

Hitting a square meter solar panel at right angles requires about 30,000 photons per second producing 1 watt of energy at 100% efficiency. The numbers obtained without assuming constant spectral power distribution and photon energy will be dealt with in a later post, but for now, we assume that a daylight standard D bulb at 5300 K will work around 11,000 Suffice it to say. Chemical reactions in the body not only release energy and produce heat, but they also release small amounts of photons, the elementary particles of light.

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Specific heat capacity of metal is the amount of heat that is required to raise the temperature of metal by 1 degree Celsius. The metals which has specific heat capacity of 0.449J/K/g is Iron. Thus correct option is option C

Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.

Mathematically,

Enthalpy=mass of metal ×specific heat capacity of metal ×Change in temperature.

mass of metal= 10.0 g

change in temperature= 14.0° C =14K

specific heat capacity of metal=?

Q= enthalpy= 62.9 J

Substituting all the given values

specific heat capacity of metal= 62.9 J÷( 10.0 g × 14.0 K )

                                                 = 0.449J/K/g

Therefore the metals which has specific heat capacity of 0.449J/K/g is Iron. Thus correct option is option C

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Answer:

0.08467 kg

Explanation:

1 cg = 10^-5 kg

so 8,467 x 10^-5 = 0.08467 kg

The most powerful laser in the world fires a pulse at 25 fempto seconds producing 30 terawatts of power in physical sciences, power (watt) =Energy (J or kg•m²×s⁻²)/time (s)if the average laser fires 7.5 x 10²⁰ photons in a pulse, then wavelength of the light fired in the world’s most powerful laser is 37×10⁻¹⁰ nm

A laser is the device that emit a beam of coherent light through an optical amplification process

Here given data is

Energy = time × power

Energy = 25 ×  30

Energy = 750 J

Photons = 7.5 x 10²⁰

We have to calculate wavelength = ?

Then the formula is E =hcλ where E = energy, h = plank constant, c= speed, λ = wavelength

λ = hcE

λ = 6.62×10⁺³⁴×7.5 x 10²⁰ ×750 J

λ = 37×10⁻¹⁰ nm

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The question requires us to calculate the volume of a gas when its pressure is kept constant and its temperature is raised from 200 to 600 K.

The following information was provided by the question:

Initial volume of gas = V(1) = 6.00 L

Initial temperature of gas = T(1) = 200 K

Final temperature of gas = T(2) = 600 K

According to Charle's Law, the volume of a given confined gas under constant pressure increases as the temperature increases and decreases as the temperature decreases. In other words, the Charle's Law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale when the pressure is held constant

Mathematically, we can write this as:

where V(1) and T(1) refers to the volume and temperature of the gas at the initial state, and V(2) and T(2) refers to volume and temperature at the final state.

We can rearrange the equation above in order to calculate the final volume of a gas:

Now, we can apply the values given by the question to this equation and calculate the final volume of the gas:

Therefore, the final volume of the gas when the temperature is increased under constant pressure is 18.0 L and the best option to answer this question is letter D.

EXPLANATION:

Firstly, we need to define a solution

The solution is defined as a homogenous mixture of two or more substances in relative amounts that can be varied continuously.

Coke is an aqueous homogenous mixture of carbon dioxide, sugar, concentrate, etc The ingredient used in the production of coke are mixed in the right proportion and this make coke a homogenous solution

Temperature can affect the character of a coke. Carbonated soft drink tends to lose their fizz at high temperature. This is because as the temperature increases, the loss of carbon dioxide in the liquid will also increase.

Also, at high temperatures, the solubility of gases decreasese.

Answer:

A compound is a distinct group of atoms held together by chemical bonds. ... As we will now see, there are a variety of different ways to represent and draw

Explanation:

In Methane, we have 1 carbon atom combining with 4 hydrogen atoms.

It can also be said as

1 mole C + 4 mole of H = CH₄

These atoms combine together to give us 1 mole of CH₄

In the question given, we have 1 mole of carbon and 4 moles of hydrogen.

However, the equation for the formation of CH₄ is quite different as it is formed by hydrogenation of ethyne or ethene.

The above equation are some of the known ways to which methane is formed.

From the explanation above, we have 1 atom of C and 4 atoms of H