According to the equation, 2 H2 + O2 --> 2 H20, how many moles of oxygen are required to convert 12 moles of hydrogen to water?

Answer:

0.0010 mol·L⁻¹s⁻¹  

Explanation:

Assume the rate law is  

rate = k[A][B]²

If you are comparing two rates,

[tex]\dfrac{\text{rate}_{2}}{\text{rate}_{1}} = \dfrac{k_{2}\text{[A]}_2[\text{B]}_{2}^{2}}{k_{1}\text{[A]}_1[\text{B]}_{1}^{2}}= \left (\dfrac{\text{[A]}_{2}}{\text{[A]}_{1}}\right ) \left (\dfrac{\text{[B]}_{2}}{\text{[B]}_{1}}\right )^{2}[/tex]

You are cutting each concentration in half, so

[tex]\dfrac{\text{[A]}_{2}}{\text{[A]}_{1}} = \dfrac{1}{2}\text{ and }\dfrac{\text{[B]}_{2}}{\text{[B]}_{1}}= \dfrac{1}{2}[/tex]

Then,

[tex]\dfrac{\text{rate}_{2}}{\text{rate}_{1}} = \left (\dfrac{1}{2}\right ) \left (\dfrac{1}{2}\right )^{2} = \dfrac{1}{2}\times\dfrac{1}{4} = \dfrac{1}{8}\\\\\text{rate}_{2} = \dfrac{1}{8}\times \text{rate}_{1}= \dfrac{1}{8}\times \text{0.0080 mol$\cdot$L$^{-1}$s$^{-1}$} = \textbf{0.0010 mol$\cdot$L$^{-1}$s$^{-1}$}\\\\\text{The new rate is $\large \boxed{\textbf{0.0010 mol$\cdot$L$^\mathbf{{-1}}$s$^{\mathbf{-1}}$}}$}[/tex]

Answer:

n = 0.26 mol.

Explanation:

Given,

Pressure, P = 99.7 kPa = 1 atm

where 101.325 kPa  = 1 atm

            P = 0.984 atm

Temperature, T = 297 K

Volume = 6.452 L

Now, using ideal gas equation

PV = n RT

0.984 x 6.452 = n x 0.08206 x 297

n = 0.26 mol.

Answer:

It indicates it is a suspension b/c in a suspension heavy particles separate or fall and the ingredie-nts would need to be mixed after sinking.

and for the milk one I'm not sure but I think when u shake milk well it may change into a butter.

Because some of the larger particles in a suspension will eventually settle out.

Suspensions are defined as a mixture that is heterogeneous, meaning the solid particles are dispersed throughout the liquid without really dissolving in it. The friction between the tires of your car and the pavement is increased by suspension systems. It is possible to steer your car more steadily and enjoy more comfortable handling by increasing friction. You can drive more securely and safely the more contact your tires have with the road.

The fact that the ingredients would need to be mixed after sinking suggests that it is a suspension. For the milk one, I'm not sure, but I believe that when milk is shaken thoroughly, it may transform into butter.

Thus, because some of the larger particles in a suspension will eventually settle out.

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Answer:

The mass (M) and speed of an object (v)

Explanation:

Final answer:

The amount of kinetic energy an object has is determined by its mass and velocity, governed by the equation KE = 1/2mv², indicating that energy increases with mass and quadruples with a doubling of velocity.

Explanation:

What Determines the Amount of Kinetic Energy an Object Has?

The amount of kinetic energy that an object possesses is determined by two primary factors: the mass of the object and its velocity. According to the principles of classical mechanics, the kinetic energy (KE) is given by the equation KE = 1/2mv², where m represents mass and v represents velocity. Thus, the kinetic energy increases with a higher mass and increases dramatically with a higher velocity, as the velocity is squared in the equation. For example, a heavy truck moving at a certain speed has more kinetic energy than a smaller car moving at the same speed because the truck has a greater mass. Additionally, if an object's speed is doubled, its kinetic energy increases by a factor of four, not two, demonstrating that kinetic energy is more sensitive to changes in velocity than to changes in mass.

Answer:

B ) Superscript 24 subscript 11 upper N a right arrow superscript 24 subscript 12 upper M g plus superscript 0 subscript negative1 e.

Explanation:

Answer:

its b

Explanation:

Answer:

As community goes through multiple changes through each stage of succession, it is not in equilibrium.

Explanation:

Equilibrium in ecology refers to a state that occurs such that a small disturbance or change is counter balanced by another change so that the community is restored to its original state.

Answer:

secondary succession

Explanation:

succession that follows disruption of a pre-existing community is called secondary succession.

sorry i was late!

Answer:

Absorb energy.

Explanation:

If you wanted to make a cold pack that absorbs heat (aka an endothermic reaction), then you'd want to use a chemical that absorbs energy. This would absorb the heat. Hope this helped :)

It is critical to evaluate the sort of chemical that will be utilised while creating a cold pack. The solution is dependent on the desired consequence of the cold pack.

A cold pack is often made using an energy-absorbing substance. The most popular form of cold pack employs a chemical process to absorb energy from the environment, causing the pack's temperature to drop.

A "chemical cold pack" is another name for this sort of cold pack. A chemical cold pack's chemical reaction is often an exothermic reaction. This indicates that the reaction generates heat, which the pack absorbs and causes the temperature to fall.

Another application for a cold pack To absorb energy, a phase transition substance such as wax or glycol is used. A "phase change cold pack" is another name for this sort of cold pack. The phase change material absorbs energy from the environment, lowering the temperature of the pack.

This sort of cold pack is frequently used for medicinal purposes, such as relieving sprains and strains. Finally, when creating a cold pack, it is critical to consider the type of chemical that will be used. A chemical that absorbs energy is typically used to construct a cold pack, as this causes the pack's temperature to drop.

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Answer:

Carbon

Explanation:

looked it up

The element that humus is especially rich in is  carbon.  Option 2.

Humus is a dark, organic component of soil formed from the decomposition of plant and animal matter. It is the result of the breakdown of organic materials such as leaves, roots, and other organic residues.

Carbon is a significant component of these organic materials, and as they decompose, a portion of the carbon is transformed into stable organic compounds, forming humus.

Humus plays a crucial role in soil fertility and nutrient cycling and is known for its high carbon content.

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Answer:

a state in which opposing forces or influences are balanced

Explanation:

Answer:

4g

Explanation:

Equation of reaction

2H₂ + O₂ → 2H₂O

Molar mass of O2 = 16g/mol

Molar mass of water = 18g/mol

Number of moles = mass / molar mass

Mass = molar mass × number of moles

Mass of O2 = 1 × 16 = 16g

Mass of H2O = 2 × 18 = 36g

So from equation of reaction,

16g of O2 = 36g of H2O

X of O2 = 9g of H2O

X = (9 × 16) / 36

X = 4g

4g of O2 will produce 9g of H2O

Answer: 128 mL

Explanation: 120mL/300k=v2/320k

The new volume of the balloon when the temperature increases from 300.0 K to 320.0 K, while keeping pressure constant, is 128.0 mL.

The original question asks for the new volume of a balloon filled with gas when the temperature is increased from 300.0 K to 320.0 K, assuming pressure remains constant. This is a direct application of Charles's Law, which states that at constant pressure, the volume of a fixed amount of gas is directly proportional to its temperature in Kelvin. The formula for Charles's Law is V₁/T₁ = V₂/T₂, where V₁ and T₁ are the initial volume and temperature, and V₂ and T₂ are the final volume and temperature, respectively.

To solve for V₂, we rearrange the formula to V₂ = V₁ × (T₂/T₁). Plugging in the values:

V₁ = 120.0 mL (initial volume)

T₁ = 300.0 K (initial temperature)

T₂ = 320.0 K (final temperature)

So, V₂ = 120.0 mL × (320.0 K / 300.0 K)

V₂ = 120.0 mL × (1.0667)

V₂ = 128.0 mL when rounded to three significant figures.

Answer:

The work done is 2,907 J

Explanation:

Work is one of the forms of energy transmission between bodies. To perform a job, you must exert a force on a body and it moves. In other words, when a force is applied to a body and it moves, work is done.

The work is equal to the product of the force by the distance and by the cosine of the angle that exists between the direction of the force and the direction that the moving point or object travels:

W = F * d * cos α

In the International System of Units the Force is expressed in newtons and the distance in meters, so the work will have units of newtons. Meter = joules (J).

In this case:

Replacing:

W= 255 N* 11.4 m* cos 0

Solving:

W= 255 N* 11.4 m* 1

W= 2,907 J

The work done is 2,907 J

The work done by the sailor is 2907 joules (J).

To calculate the work done by the sailor, we can use the formula for work:

[tex]\[\text{Work} = \text{Force} \times \text{Distance} \times \cos(\theta)\][/tex]

where:

- [tex]\(\text{Force}\)[/tex] is the force exerted by the sailor,

- [tex]\(\text{Distance}\)[/tex] is the distance over which the force is applied,

- [tex]\(\theta\)[/tex] is the angle between the force and the direction of movement.

If the force is applied in the direction of the movement, [tex]\(\theta = 0\)[/tex] degrees and [tex]\(\cos(0) = 1\)[/tex].

Given:

- [tex]\(\text{Force} = 255 \, \text{N}\)[/tex]

- [tex]\(\text{Distance} = 11.4 \, \text{m}\)[/tex]

- [tex]\(\theta = 0\)[/tex] degrees (assuming the force is in the direction of the movement)

Substitute these values into the formula:

[tex]\[\text{Work} = 255 \, \text{N} \times 11.4 \, \text{m} \times \cos(0)\][/tex]

[tex]\[\text{Work} = 255 \, \text{N} \times 11.4 \, \text{m} \times 1\][/tex]

[tex]\[\text{Work} = 2907 \, \text{J}\][/tex]

Answer:

ideal gas law

Explanation:

Consider the proportionality below. P V is proportional to n T. It represents the ideal gas law. Therefore, option C is correct.

The gas laws are made up of three major laws: Charles' Law, Boyle's Law, and Avogadro's Law (all of which will later combine into the General Gas Equation and Ideal Gas Law).

Boyle's law, Charles' law, Gay-law, Lussac's and Avogadro's law are combined to form the ideal gas law: P·V = n·R·T.

The ideal gas law (PV = nRT) describes how the macroscopic properties of ideal gases are related. An ideal gas is one in which the particles do not attract or repel one another and occupy no space (have no volume).

Thus, option C is correct.

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Answer:

An acid is higher on the pH scale, bases are slippery compared to acids.

Explanation:

Answer:

c

Explanation:

it should be the cathode, where metal ions are reduced to metal atoms.

correct on edge 2021

Explanation:

1. Wear Personal Protective Equipments.

2. Do not eat or drink in the laboratory.

3. No horseplaying.

4. No running around.

5. Do not leave any experiments that involve fire unattended.

6. Treat every chemicals as if it is dangerous even if it's just water.

Answer:

Some of the acid has dissociated

Explanation:

If Ka is a great deal extra than 1, the acid is basically dissociated and so is said to be a robust acid. If Ka is much less than 1, the acid is dissociated only to a small quantity and so is said to be a vulnerable acid.

So the suitable answer is option D. some of the acids have dissociated.

the usage of Ka and pKa To are expecting Equilibrium and strength of Acids. Ka can be used to measure the placement of equilibrium: If Ka is massive, the formation of the goods of the dissociation is favored. If Ka is small, the undissolved acid is preferred.

The acid dissociation constant (Ka) is used to distinguish sturdy acids from susceptible acids. robust acids have fairly excessive Ka values. The Ka price is located by looking at the equilibrium regular for the dissociation of the acid. The better the Ka, the greater the acid dissociates.

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Final answer:

The stapedius muscle stabilizes the stapes bone in the ear, the sartorius aids in hip and knee movements, and the gluteus maximus extends the femur at the hip joint.

Explanation:

The muscles mentioned each have specific functions:

The intrinsic skeletal muscles of the back and neck, along with the muscles of the abdominal wall and thorax, help maintain posture, facilitate movement, and stabilize different parts of the body's trunk.

Answer:

This has to do with the charge. The charge of K is +1. The charge of Cl is -1. I like to use a method called the criss cross method. So K+1 and Cl-1. I give each number to the other atom. (the "1" in Cl-1 goes to K the "1" in K+1 goes to Cl) so it becomes K1Cl1 which is KCl. Oxygen has a charge of 2-, so the 2 goes to the K and the 1 in K goes to the O, so it becomes K2O. Dm me if you want further explanation.

Explanation:

Final answer:

Potassium chloride consists of potassium and chloride ions, each with a 1+ and 1- charge, respectively, forming the formula KCl. Potassium oxide requires two potassium ions to balance the 2- charge of the oxide ion, resulting in the formula K₂O.

Explanation:

The reason why potassium chloride has the formula KCl but potassium oxide has the formula K₂O is based on the charges of the ions each metal and nonmetal forms. Potassium (K) forms a cation with a 1+ charge, while chloride (Cl) forms an anion with a 1- charge. To balance the charges, one potassium ion will pair with one chloride ion, resulting in the formula KCl, which has a neutral overall charge.

On the other hand, oxygen (O) forms an oxide anion with a 2- charge. To balance the charges, two potassium ions with a 1+ charge each are needed for every one oxide ion. This results in the chemical formula K₂O, as the two potassium ions balance out the charge of the one oxide ion, making the overall compound electrically neutral.

Answer:

nuclear, heat and electrical

Explanation:

Answer:

electrical

nuclear

mechanical

Explanation:

I know it is right. TRUST.

Answer: 24 moles of [tex]SnF_2[/tex] are produced.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]{\text{Moles of} H_2}=\frac{48g}{2g/mol}=24moles[/tex]

[tex]Sn+2HF\rightarrow SnF_2+H_2[/tex]

According to stoichiometry :

1 mole of [tex]H_2[/tex] is accompanied with = 1 mole of [tex]SnF_2[/tex]

Thus 24 moles of [tex]H_2[/tex]  is accompanied with =[tex]\frac{1}{1}\times 24=24moles[/tex]  of [tex]SnF_2[/tex]

Thus 24 moles of [tex]SnF_2[/tex] are produced.

Answer:

Answer: A) .346 M

Explanation:

Given:

- 450 mL

- .5 M soln

-200 mL water

1) Convert mL to L

450 mL = .45 L

200 mL = .2 L

2) Find mols in solution

.5 M = x/.45 L

x = .225 mol

3) Find total volume of solution

.45 L + .2 L =.65 L

4) Find new molarity

molarity (M) = mols solute/ L solution

y = .225 mol (from step 2)/ .65 L (from step 3)

y = .346 M

Answer: A) .346 M

Answer:

D. Ionic bond

Explanation:

First some definitions: ionic bonds always have metals that transfer electrons. Covalent bonds are between nonmetals that share electrons. (Sharing is caring!)

Li is a metal, so right off the bat we know this is not a covalent bond. However, it's not a metal, so we can cross off C as well. The phrase "paired bond" isn't common, so we know the answer must be D. ionic bond.

And in this bond, Li's electrons will transfer to O to make both have a full valence shell. (As opposed to covalent bonds, which share electrons, not transfer completely.)

Answer:

1.88 M

Explanation:

The following data were obtained from the question:

Mole of NaCl = 0.47 mole

Volume of solution = 0.25L

Molarity =?

Molarity is defined as the mole of solute per unit litre of the solution. It can represented mathematically as:

Molarity = mole /Volume

Using the above formula, the molarity of the salt water solution can be obtained as follow:

Molarity = 0.47/0.25

Molarity = 1.88 M

The system will shift towards the reactant's side.

A chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms in the molecule

[tex]PCl_5[/tex] (g) is removed. As [tex]PCl_5[/tex] (g) is removed/concentration decreases, the equilibrium will shift to oppose the change.  

According to principle when the concentration of reactant decreases, the equilibrium shift towards the reactant side.

Hence, equilibrium will shift towards reactants.

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Final answer:

If PCl5 is removed from the equilibrium PCl5(g) = PCl3(g) + Cl2(g), the equilibrium will shift to the left to replace the removed PCl5, according to Le Châtelier's Principle.

Explanation:

Using the equation PCl5(g) = PCl3(g) + Cl2(g), if PCl5 is removed, the equilibrium will shift toward the left to replace the removed PCl5. This is because, according to Le Châtelier's Principle, when a component of a reaction at equilibrium is removed, the equilibrium will shift in the direction that tends to replace that component. In this reaction, removing PCl5 decreases its concentration, thus the system shifts left to increase its concentration by converting PCl3 and Cl2 back into PCl5.

Answer:

Fossil fuel

Explanation:

Fossil fuel is defined as deposits of organic materials. It is usually formed from decayed plants and animals which has been converted to crude oil, coal, natural gas, or heavy oils due to exposure to heat and pressure over a very long period of time which ranges between hundreds of millions of years.

Fossil fuels are the major sources non renewable energy which is used in the generation of electricity.

Answer:

both the atomic mass and the atomic number increase from left to right

Explanation:

Answer:

c

Explanation:

i just did it

To find the number of atoms present in 55 grams of iron, we need to convert grams to moles and then use Avogadro's number to convert moles to atoms.

To find the number of atoms present in 55 grams of iron, we need to convert grams to moles and then use Avogadro's number to convert moles to atoms. The molar mass of iron is 55.8 g/mol. Therefore, 55 grams of iron is equal to:

55 g / 55.8 g/mol = 0.986 moles of iron.

Since 1 mole of any substance contains Avogadro's number (6.022 x 10^23) of particles, the number of atoms in 0.986 moles of iron is:

0.986 mol x (6.022 x 10^23 atoms/mol) = 5.93 x 10^23 atoms of iron.

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There are [tex]$\boxed{1.20 \times 10^{24}}$[/tex] atoms of iron present in 55 grams of iron.

To determine the number of atoms in 55 grams of iron, we follow these steps:

1. First, we need to know the molar mass of iron. The molar mass of iron (Fe) is approximately 55.845 grams per mole.

2. Next, we use Avogadro's number, which is [tex]$6.022 \times 10^{23}$[/tex] atoms per mole, to find the number of atoms in one mole of iron.

3. Now, we calculate the number of moles in 55 grams of iron by dividing the mass of iron by its molar mass:

[tex]\[ \text{moles of iron} = \frac{\text{mass of iron}}{\text{molar mass of iron}} = \frac{55 \text{ g}}{55.845 \text{ g/mol}} \approx 1 \text{ mol} \][/tex]

4. Finally, we multiply the number of moles by Avogadro's number to find the total number of atoms:

[tex]\[ \text{number of atoms} = \text{moles of iron} \times \text{Avogadro's number} \] \[ \text{number of atoms} \approx 1 \text{ mol} \times 6.022 \times 10^{23} \text{ atoms/mol} \] \[ \text{number of atoms} \approx 6.022 \times 10^{23} \text{ atoms} \][/tex]

Since we have approximately 1 mole of iron, the number of atoms is approximately equal to Avogadro's number. Therefore, there are approximately [tex]$1.20 \times 10^{24}$[/tex] atoms of iron in 55 grams of iron, considering the minor rounding in the molar mass.

Answer:

Answer is option (d) (lowest to highest)

We have to rank the six vehicles according to the CO2 emission causing an impact on global warming. We know that burning of coal has the highest emission of all fossil fuel so EV powered by electricity from it will be the highest impact on global warming with highest CO2 emission, next is burning of gasoline, but the CO2 emission can be varied by the process of the burning in engines obviously a high-efficiency burning will have less impact than a regular standard engine. So, after ICEV standard will have high CO2 emission than the ICEV (high efficiency), now the next will be EV which is having its electricity supplied by a mix of resources, the production involves both fossil and non-fossil fuel which make this vehicle more environmentally friendly than the full fossil fuel-based. The ICEV with less driving has the second least emission because you are not burning the fuel like other vehicles because of not driving the vehicle. In the last will be the EV having powered by electricity of wind it will be the least emission almost zero because it using wind power to generate electricity. Hence arrangement comes like this, EV(wind), ICEV(less driving), EV (mix of sources), ICEV (high-efficiency), standard ICEV, EV (coal) from lowest to highest CO2 emission.

Answer:

increases to 100 times the original concentration

Explanation:

Took the test and got it right.

Answer:

increases to 100 times the original concentration

Explanation:

got it right on edge