h
please help me with my question I will like and mark as brainliest NO LINKS THEY DON'T WORK AND IF U DON'T KNOW THE ANSWER PLS DON'T ANSWER AT ALL​

If 250 mL of methane (CH4) effuses through a small hole in 48 s, the time required for the same volume of helium to pass through the hole is approximately 96 s.

The effusion rate of a gas is inversely proportional to the square root of its molar mass, according to Graham's law of effusion. In this case, we need to compare the effusion rates of methane and helium.

Since the volume is constant, we can use the ratio of their times of effusion.

Let's assume the molar mass of methane (CH4) is M1 and the molar mass of helium (He) is M2. According to Graham's law, the ratio of the effusion times is given by:

(time for methane) / (time for helium) = √(M2 / M1)

Given that the time for methane is 48 s, we need to find the time for helium. Rearranging the equation, we have:

(time for helium) = (time for methane) / √(M2 / M1)

By substituting the molar masses of methane (16.04 g/mol) and helium (4.00 g/mol), we can calculate:

(time for helium) = 48 s / √(4.00 g/mol / 16.04 g/mol)

(time for helium) = 48 s / √(0.25)

(time for helium) = 48 s / 0.5

(time for helium) = 96 s

Therefore, the time required for the same volume of helium to pass through the hole is approximately 96 seconds.

Learn more about Graham's law of effusion here:

brainly.com/question/30982581

#SPJ11

yep, the cell is the smallest unit in a living organism that is capable of carrying out all of the activities of life.

You wish to plate out zinc metal from a zinc nitrate solution and you're considering whether Al, Ni, or both metals could be used for this purpose. The correct answer is A. Al (Aluminum).

To understand why, we need to consider the reactivity series of metals. The reactivity series is a list of metals arranged in the order of their decreasing reactivity. When it comes to displacement reactions, a more reactive metal can displace a less reactive metal from its salt solution.

In the reactivity series, aluminum is more reactive than zinc, while nickel is less reactive than zinc. So, when you place aluminum (Al) in a zinc nitrate solution, it will displace zinc metal due to its higher reactivity. However, if you place nickel (Ni) in the zinc nitrate solution, no reaction will occur since nickel is less reactive than zinc. Therefore, to plate out zinc metal from a zinc nitrate solution, you should use A. aluminum (Al) as the metal for the displacement reaction.

To learn more about reactivity series  here:

https://brainly.com/question/306704

#SPJ11

Where's the question (s)?

Answer:

Tools of Monetary Policy

For example, if a central bank increases the discount rate, the cost of borrowing for the banks increases. Subsequently, the banks will increase the interest rate they charge their customers. Thus, the cost of borrowing in the economy will increase, and the money supply will decrease.

Explanation:

Brainliest please?

Answer:

The government lowers taxes and increases spending

Explanation:

Answer:

There is ionic bonding between Mg2+ ions and NO3− ions. Which of the following claims about a binary compound in which the bonding is ionic is most likely to be scientifically valid? Both elements in the compound are metals.

Answer:

The answer is D.

Explanation:

A: not correct: one element is a metal and the other is a non-metal.

B: not correct: Fr could be combined with Cl

C: not correct: They are transferred not shared.

D: correct: Non-metals have a higher electronegativity in comparison to the metals with a low electronegativity which results in a great change in electronegativity.

Answer:

3.0 atm

Explanation:

got it right on edge after guessing 2 times

The resulting pressure of the gas after decreasing the initial volume is 3 atm.

According to the Boyle's Law at constant temperature, pressure of the gas is inversely proportional to the volume of the gas:

P ∝ 1/V

For the given question required equation is:

P₁V₁ = P₂V₂, where

P₁ = initial pressure = 1.5 atm

V₁ = initial volume = 2 L

P₂ = final pressure = ?

V₂ = final volume = 1 L

On putting all these values on the above equation, we get

P₂ = (1.5)(2) / (1) = 3atm

Hence required pressure is 3 atm.

To know more about Boyle's Law, visit the below link:
https://brainly.com/question/469270

The periodic table is a tabular representation of chemical elements grouped by atomic number, electron configurations, and chemical characteristics. The periodic table's organisation is crucial because it helps predict the chemical characteristics and reactivity of the elements.

The periodic table arranges the elements in rows and columns based on increasing atomic number. Each row is referred to as an era, and each column is referred to as a group or family. The chemical and physical properties of elements in the same group are comparable. This is due to the fact that they contain the same number of valence electrons at their outermost energy level, which governs their chemical behaviour.

Group 1 elements, such as alkali metals, have one valence electron and are highly reactive. They easily give up this electron in order to generate a positive ion.

Group 18 elements, on the other hand, have a full complement of valence electrons and are chemically inert. They do not easily combine to produce compounds.

For more such questions on periodic table.

https://brainly.com/question/11155928#

#SPJ11

Answer:

One of the elements must be a metal and another be a non metal.

One of the elements must lose electrons and the other must gain electrons.

The pH of 10 g dm -3 HCL​ is 3. The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality.

Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

Hydrogen potentials are what PH stands for. It speaks of how many hydrogen ions are present in a solution. This serves as a gauge for the acidity or alkalinity of a solution. On a pH scale, the pH value ranges from 0 to 14.

A solution's pH is a significant indicator of its chemical composition. The pH may affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.

[ H⁺ ] = 10 − 3 M,

pH = − log [ 10 − 3 ],

pH = 3.

Thus, The pH of 10 g dm -3 HCL​ is 3.

To learn more about pH, follow the link;

https://brainly.com/question/491373

#SPJ1

There are approximately 12.7 grams of phosphorus in a 50-gram sample of aluminum phosphate.

To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to know the molar mass and the chemical formula of aluminum phosphate.

The chemical formula for aluminum phosphate is AlPO4. It indicates that each molecule of aluminum phosphate contains one aluminum atom (Al), one phosphorus atom (P), and four oxygen atoms (O).

To calculate the molar mass of aluminum phosphate, we can add up the atomic masses of its constituent elements based on their stoichiometric ratios:

Molar mass of AlPO4 = (molar mass of Al) + (molar mass of P) + (4 * molar mass of O)

Using the periodic table, we can find the atomic masses of the elements:

Molar mass of Al = 26.98 g/mol

Molar mass of P = 30.97 g/mol

Molar mass of O = 16.00 g/mol

Now, let's calculate the molar mass of aluminum phosphate:

Molar mass of AlPO4 = (26.98 g/mol) + (30.97 g/mol) + (4 * 16.00 g/mol)

= 121.95 g/mol

The molar mass of aluminum phosphate is 121.95 g/mol.

To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to calculate the mass fraction of phosphorus in the compound. The mass fraction is the ratio of the molar mass of phosphorus to the molar mass of aluminum phosphate.

Mass fraction of phosphorus = (molar mass of P) / (molar mass of AlPO4)

= (30.97 g/mol) / (121.95 g/mol)

≈ 0.254

Multiplying the mass fraction by the mass of the sample gives us the grams of phosphorus:

Grams of phosphorus = (mass fraction of phosphorus) * (mass of the sample)

= 0.254 * 50 g

≈ 12.7 g

For more such questions on  aluminum phosphate visit:

https://brainly.com/question/15072110

#SPJ8

Answer:

Well a human bein is a complex organism with pain and emotion.

There is a very very complex brain that recives and sends sis also faster than the eye can see.

Thats why when you touch a hot surface a lighting fast signal is sent from the hand to the brain and the brain sends a signal back to the hand to tell it what to do and this all happens a faster than a second.

A human is made out of millions, billions, trillions, and quadrillions if cells working together to perform special tasks like eating, walking, and talking.

Answer:

Humans are the only known species that are able to think as complexly as we do. For example, animals are not able to have thoughts about their thoughts. Animals are not able to ponder the existence of our universe, develop calculus, chemical solutions, etc. There are many other intelligent species- like chimpanzees and octopi. However, both of those species are limited in the type of communication, emotion, and complex thinking skills that they possess compared to human beings.

Explanation:

Answer:

Explanation:

Dang which subject is this history or science

Answer:

tác dụng với acid,

Explanation:

The table shows the number of moles in 6 grams of four elements: carbon, hydrogen, oxygen, and nitrogen. Using carbon's molar mass of 12.0 g/mol.

we can calculate that 6.0 grams of carbon corresponds to 0.50 moles of carbon. To find the moles of an element, we divide the given mass by its molar mass. In this case, we divide 6.0 grams of carbon by its molar mass of 12.0 g/mol, resulting in 0.50 moles of carbon. This calculation is based on the concept of the molar mass, which represents the mass of one mole of a substance. By using this equation, we can convert grams to moles and vice versa, enabling us to relate the mass and quantity of a substance in a chemical reaction or other calculations.

learn more about carbon here:

https://brainly.com/question/13046593

#SPJ11

10 kg.cm/s² is equivalent to 0.1 N when converted into newton.

The unit of force in the International System of Units (SI) is the newton (N). One Newton is defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared (1 N = 1 kg⋅m/s² ).

10 kg⋅cm/s²  can be converted to newtons using the following formula:

1 N = 1 kg⋅m/s²

First, we need to convert cm to meters, as the unit of force is in newtons, which is based on meters.

1 cm = 0.01 m

Therefore, 10 kg⋅cm/s² can be converted to:

10 kg × 0.01 m/s² = 0.1 kg⋅m/s²

Now, using the formula:

1 N = 1 kg⋅m/s²

We can convert 0.1 kg⋅m/s² to newtons:

0.1 kg⋅m/s² = 0.1 N

To learn more about newton follow the link:

https://brainly.com/question/12505464

#SPJ4

A reactor, acetic acid, salicylic acid, and the use of an acetic anhydride to complete the reaction are all used in the production of aspirin.

To learn more about the aspirin visit:

https://brainly.com/question/13494090

#SPJ1

The enthalpy change per kilogram of hydrogen is -120 kJ/ g H2

What is enthalpy of a reaction?

A chemical reaction's change in enthalpy that takes place under a constant pressure is known as the "heat of reaction" or "enthalpy of reaction." It is a helpful thermodynamic unit of measurement for figuring out how much energy per mole is emitted or created during a reaction. Enthalpy is a state function as well because it is created by pressure, volume, and internal energy, all of which are state functions.

The reaction is,

2H2(g)+O2(g) = 2H2O(g) H=-484 kJ

The molar weight of hydrogen, which is represented in the equation as H2, is 2.02 g/mol. According to the equation, 2 mol of H2 produce 484 kJ of heat. The heat evolved per gram of hydrogen is calculated by dividing this by the 2 mol H2 and the 2.02 g/mol H2:

(-484 kJ/2 mol H2)(1 mol H2/2.92 g H2) = -120. kJ/g H2

Hence, the enthalpy change per kilogram of hydrogen is -120 kJ/ g H2

To know more about enthalpy of the reaction from the given link

https://brainly.com/question/15516625

#SPJ4

If excess ammonium sulfate reacts with 20.0g of calcium hydroxide then liters of ammonia are produced at STP 0.081L

Ammonium sulphate is the organic solvent and the primary use of ammonium sulphate is as a fertilizer for alkaline soils

Here given reaction is

(NH₄)₂SO₄ + Ca(OH)₂ → CaSO₄ + NH₃ + H₂O

Here given data is

Calcium hydroxide  = 20.0g

We have to find liters of ammonia are produced at STP =?

20.0g of (NH₄)₂SO₄ STP = ?

Then 20.0g of (NH₄)₂SO₄×1 mol/132g×0.54L/1 mol = 0.081L

Know more about litre

https://brainly.com/question/2981088

#SPJ1

Answer:

The population of predatory fishes will change.

The biodiversity of the ecosystem will decrease.

Explanation:

Answer:

The population of predatory fishes will change.

The biodiversity of the ecosystem will decrease.

Explanation:

Im on the edmentum mastery test.

Considering the given bonded atoms below:

A polar bond occurs when there is a significant difference in electronegativity between two atoms in a molecule.

In a polar bond, the more electronegative atom pulls the shared electrons closer to itself, creating an uneven distribution of charge.

An example of a polar bond is C-Cl.

A non-polar bond occurs when there is little or no difference in electronegativity between the atoms in a molecule.  Both atoms have similar or identical electronegativity, leading to a balanced distribution of charge.

An example is the C-C bond.

Learn more about polar and non-polar bonds at: https://brainly.com/question/17118815

#SPJ1

The reaction between pottasium metal and chlorine gas is a combination reaction and it is as follows;

2K + Cl₂ → 2KCl

A chemical reaction is a process involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.

A chemical reaction is said to be a combination reaction when two or more atoms are joined together to form a compound. An example is the reaction of pottasium metal and chlorine gas to produce pottasium chloride as follows:

2K + Cl₂ → 2KCl

In the above equation, two elements; pottasium chemically combines with chlorine to form a compound; pottasium chloride.

Learn more about combination reaction at: https://brainly.com/question/32027270

#SPJ1

According to the given condition the color will change to blue if you dip red litmus paper in second solution ie. Baking powder in water.

To learn more about litmus paper refer :

https://brainly.com/question/21701125

#SPJ4

200ml of MgO require 0.5m/L of mass.

You must dissolve 40.00 g of sodium hydroxide pellets in 250 ml of distilled water to create 1MMgO  solution, and you must then dilute the solution to 1 litre. You can make 1M MgO  solution by weighing 19.95 g of MgO  pellets and dissolving them in 500 ml of distilled water.

Thus, we can state that 200 ml of a 0.400M solution has 3.2 g of MgO . Solvent and solute are combined to form a solution. The solute is the substance that is present in solution in a smaller amount, while the solvent is the is quite strongly present.

To know more about Mass of MgO visit:-

https://brainly.com/question/17139209

#SPJ1

The products obtained when benzene is treated with following reagents,

(a) C₆H₆ - SO₃H

(b) C₆H₆ - NO₂

(c) C₆H₆ - Cl

(d) C₆H₆ - CH₃Cl

(e) C₆H₆ - Br

(f) C₆H₆ - NH₂

Generally benzene is described as a colorless or light-yellow chemical which remains as liquid at room temperature. Benzene is basically used primarily as a solvent in most of the chemical and pharmaceutical industries, and also as a starting material and an intermediate during the synthesis of numerous chemicals, and in gasoline.

When benzene is treated with different reagents it produces different products which are used is different purposes.

Learn more about benzene from the link given below.

https://brainly.com/question/14525517

#SPJ4

Answer:

The California Condor is on the verge of extinction. There were three individuals, all males, known to be living free in late 1986. That was a drop from fifteen wild birds (including five breeding pairs) known to have been present in 1984. Twenty-one condors were also alive in captivity toward the end of 1986.

Explanation:

The temperature of the gas after it is cooled from 260°C to a volume of 75.0L would be approximately 296 K or 23°C.

The temperature and volume of a gas are directly proportional, as described by the ideal gas law. The ideal gas law states that the pressure, volume, and temperature of a gas are related by the equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin.

To determine the temperature of the gas after it is cooled from 260°C to a volume of 75.0 L, we can use the following formula:

T1/T2 = V1/V2

Where T1 and V1 are the initial temperature and volume, and T2 and V2 are the final temperature and volume.

Converting the initial temperature of 260°C to Kelvin gives us T1 = 533 K, and the initial volume of 135 L is V1 = 135 L. The final volume is given as V2 = 75.0 L.

Therefore, T2 = (V2/V1) x T1 = (75.0 L/135 L) x 533 K = 296 K.

For such more questions on temperature

https://brainly.com/question/4735135

#SPJ11

Answer:

A uniform temperature distribution is a MACROscopic property where the temperature is measured to be the same throughout the volume measured. An ideal gas with a uniform temperature distribution would have a Bellman distribution of kinetic energy of microscopic particles.

Explanation:

I am walter white

Answer:

Hydrogen peroxide does not make a good antiseptic for open wounds because catalase in human tissues neutralizes it.

Explanation:

The neutralization of hydrogen peroxide by the enzyme catalase present in the cells of an open wound can cause damage to the cells and impede the healing process, making hydrogen peroxide not a good antiseptic for open wounds.

When it comes in contact with the living tissue, the enzyme catalase catalyzes the breakdown of the hydrogen peroxide into water and oxygen. This process can generate heat and cause damage to the cells in the area. Additionally, the breakdown of hydrogen peroxide can also generate free radicals, which can further damage the cells in the wound. Furthermore, the neutralization of hydrogen peroxide by catalase can cause the wound to dry out, making it more difficult for new cells to grow and the wound to heal.

To learn more about hydrogen peroxide click here:

https://brainly.com/question/29102186

#SPJ4