you have a sample of 23.8 g of C2H6. how many moles of C2H6 are in the sample?


Be sure to show your work and each step is writing out clearly.

The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group

Answer & Explanation:

The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.

Answer:

The Density Of Ar (g) At -11°C And 675 MmHg (R =0.08206 L·atm/mol·K, 1 Atm = 760mmHg).

A pressure cοοker uses pressure tο bοil water at a lοwer temperature than its nοrmal bοiling pοint.

Thus οptiοn A is cοrrect.

Water bοils at 100°C (212°F) when yοu cοοk in a typical saucepan at atmοspheric pressure (14.7 pοunds per square inch [psi]). A pressure cοοker's inside can experience an additiοnal 15 psi οf pressure, οr almοst 30 psi. Water bοils at 121°C (250°F) at that pressure.

Pressure cοοkers make it simple tο swiftly create dishes that are slοw-cοοked. They are gοοd fοr tenderising less expensive cuts οf meat and efficient in terms οf electricity use.

To know more about pressure visit:-

brainly.com/question/10840252

#SPJ1

you can use this method to balance any equation,

write you elements down , then start balancing them one after the other,

starting from metals , to non metals

it's better to balance hydrogen and oxygen the last and in most cases , they are automatically balanced

you can support by rating brainly it's very much appreciated ✅

Answer:

wave velocity= frequency × wave length

=1×3

=3m/s

Explanation:

The distance covered by the wave in one second is equal to its wavelength, therefore,

wave velocity=wavelength/time period

OR wave velocity= frequency× wavelength

You can assume velocity as speed here.

Answer:

A

Explanation:

I had the exact same question on my test and I got it right

Nadia will take 8 seconds to reach her friend's house.

Speed is the measure of the distance traveled by an object per unit of time. It is a scalar quantity and is typically expressed in units such as meters per second (m/s), miles per hour (mph), or kilometers per hour (km/h).

To calculate the time Nadia will take to reach her friend's house, we can use the formula;

time = distance / speed

where distance is the amount of space traveled by an object, and time is the duration of travel.

Put the values given in the problem, we have:

time = 24 meters / 3 m/s

time = 8 seconds

Therefore, Nadia will take 8 seconds.

To know more about time here

https://brainly.com/question/15356513

#SPJ1

The structure of the Copper(1) hypochlorite is ClCuO.

We know that the chemical formula has to do with the way that we are able to show the compound or indeed any other chemical specie on paper. In this case we have the compound that has been shown as Copper(1) hypochlorite.

It should be known that in the IUPAC nomenclature, the name of the compound must be such that we can be able to write the structure of the compound from the name of the compound. This is applied in writing the structure of any compound.

Learn more about structure of a compound:https://brainly.com/question/29165067

#SPJ1

The highest levels of atp are produced through the glycolysis Krebs (a) process.

By means of chemiosmosis, oxidative phosphorylation generates ATP using energy from the movement of electrons in an electron transport system. Only one proton (H+) and one electron are present in a hydrogen atom. Potential energy, or stored energy, is available to do work in electrons. A glucose molecule needs two ATP molecules to be completely phosphorylated. When glucose is phosphorylated to fructose 1,6-diphosphate in glycolysis, two molecules of ATP are used up.

A biological process called phosphorylation involves the addition of phosphate to an organic molecule. For two examples, adding phosphate to glucose will result in glucose monophosphate or adding it to adenosine diphosphate (ADP) will result in adenosine triphosphate (ATP).

To know more about Phosphorylation visit:

https://brainly.com/question/29104155

#SPJ1

Answer:From this you can see that 5 moles of hydrogen gas would react with 2.5 of the available 3 moles of oxygen gas, to form 5 moles of water.

Explanation:

The reaction is spontaneous under conditions of low pressure and high temperature

We can say that a reaction is spontaneous when we know that the reaction is able to go on on its own. This implies that there is a mnimum energy that is required for the reaction to proceed.

The reaction is thus a sort of a self propagating system that goes on freely of its own accord.. We can see that what is going on here is the decomposition of the nitrogen V oxide gas as shown.

Learn more about decomposition reaction:https://brainly.com/question/16987748

#SPJ1

The product would be aluminum oxide, \(Al_2O_3\).

The word equation for a reaction can be interpreted as the formula equation of the same reaction by writing out the chemical formulas of the reactants and products accordingly.

Now, let's consider the reaction in question:

Four atoms of aluminum metal react with three molecules of oxygen to produce two molecules of aluminum oxide.

Four atoms of aluminum = 4 Al

Three molecules of oxygen = \(3O_2\)

two molecules of aluminum oxide = \(2Al_2O_3\)

Thus, the formula equation would be: \(4Al + 3O_2 --- > 2Al_2O_3\)

In other words, the product would be  \(Al_2O_3\).

More on word equations can be found here: https://brainly.com/question/15423243

#SPJ1

Answer:

a beryllium ion because the new atom has 4 protons and 4 neutrons since be has a mass number of 9 then it has to form an ion

The correct answer is A. Electron

Explanation:

The model of this atom depicts the nucleus of this in the center of the model, this section of the atom contains sub-particles known as protons and neutrons. Moreover, in the atom, the nucleus is surrounded by three sub-particles that orbit or move around the nucleus. These sub-particles are the electrons; these differ from other sub-particles because they have a negative charge and they are not part of the nucleus. Also, these move around the nucleus is orbits, although they move similarly to waves. According to this, the correct answer is A.

The general form of a neutralization reaction is HF + FrOH → FrF + H₂O

We refer to this as a neutralisation reaction. Only this reaction, which produces NaCl and water as products, is a neutralisation reaction since it involves HCl and NaOH. The resulting response is listed below: NaCl(aq) + H₂O = HCl(aq) + NaOH(aq) (l)

The interaction of H⁺ ions and OH⁻ ions produces water in a neutralisation reaction, which occurs when an acid and a base combine to make water and a salt. The neutralisation of a strong acid and strong base yields a pH of 7.

To know more about reaction visit:-

https://brainly.com/question/28984750

#SPJ1

The angles as shown are supplementary angles because the add up to 180 degrees.

Two angles are said to be supplementary if they add up to 180 degrees. Now we know that the sum of angles on  straight line is 180 degrees. If we look at the image as shown in the image attached, we can see that the angles lie on a straight line.

As such, we can conclude that the angles as shown are supplementary angles because the add up to 180 degrees.

Learn more about supplementary angles:https://brainly.com/question/13045673

#SPJ1

If you accidentally add salt instead of sugar to a recipe, you can use vinegar to counteract the salty taste.

If you have added salt instead of sugar to a recipe, then you can try to remove the salt by adding a substance that will counteract its flavor. One such substance is vinegar, which is an acid and can help to neutralize the salty taste. Here are the steps to remove salt from a dish:

1. Remove as much of the salty liquid or sauce as possible.

2. Dilute the remaining sauce or liquid by adding more of the ingredients in the recipe, except for the salt

3. Taste the dish and add more sugar if needed.

4. If the dish is still too salty, add a little bit of vinegar.

5. Keep tasting the dish and adjusting the sugar and vinegar until it is no longer too salty.6. If the dish becomes too sweet, add more of the other ingredients to balance it out.

Know more about   salt   here:

https://brainly.com/question/20835655

#SPJ8

ANSWER : Metallic bonding is a type of chemical bonding that occurs between metal atoms. It involves the sharing of valence electrons between metal atoms, resulting in a sea of electrons that surrounds a lattice of positively charged metal ions.

Two common properties of metals are malleability and conductivity. Malleability refers to the ability of a metal to be shaped into thin sheets without breaking, while conductivity refers to the ability of a metal to conduct electricity and heat.

Metallic bonding produces these properties because the sea of delocalized electrons is free to move throughout the lattice of metal ions. When a force is applied to a metal, the ions in the lattice can slide past each other, facilitated by the movement of these electrons. This ability to move and slide past each other is what gives metals their malleability.

Similarly, the delocalized electrons are able to carry an electric current through the metal lattice. As electrons move through the metal lattice, they collide with the metal ions, transferring energy and producing heat. This transfer of energy is what gives metals their high thermal conductivity. In addition, the delocalized electrons are also able to transfer electrical charge through the metal lattice, resulting in the high electrical conductivity observed in metals.

In summary, metallic bonding produces the properties of malleability and conductivity in metals by creating a sea of delocalized electrons that can move freely throughout the lattice of metal ions, allowing for the movement of ions and the transfer of energy and electrical charge.

Explanation :

there you go home this helps :)

Answer:

2300J

Explanation:

The first law of thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system:

ΔU = Q - W

Where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.

In this case, ΔU is what we want to find, Q is 700 J, and W is -400 J (note that the work done by the system is negative because it is done on the surroundings). Substituting these values into the equation:

ΔU = Q - W

ΔU = 700 J - (-400 J)

ΔU = 700 J + 400 J

ΔU = 1100 J

The final internal energy of the system is therefore 1100 J + the initial energy of 1200 J, which equals 2300 J.

The value of the rate constant for the reaction would be 0.000481 s^-1.

The first-order rate law is: rate = k[A]

where [A] is the concentration of the reactant and k is the rate constant.

For a first-order reaction, the concentration of the reactant decreases exponentially with time:

[A] = [A]0 e^(-kt)

where [A]0 is the initial concentration of the reactant, t is the time, and e is the base of the natural logarithm.

We are given that the concentration of the reactant decreases to 25% of its initial value, which means that [A]/[A]0 = 0.25. We can substitute this value into the equation and solve for the time required to reach this concentration:

0.25 = e^(-kt)

Taking the natural logarithm of both sides gives:

ln(0.25) = -kt

Solving for the rate constant k, we get:

k = -ln(0.25)/t

Substituting the given time of 48 minutes (or 2880 seconds), we get:

k = -ln(0.25)/2880 s

= 0.000481 s^-1

Therefore, the value for the rate constant for the reaction is 0.000481 s^-1.

More on rate constant can be found here: https://brainly.com/question/20305871

#SPJ1

Answer:

Solar energy is essentially the light and heat emitted from the sun

Answer

ΔH for the reaction is +12.2 kJ

Explanation

Given:

The given reaction is:

The following are the given data:

What to find:

To calculate the ΔH for the given reaction.

Step-by-step solution:

Step 1: Multiply (a) through by 2

Step 2: Reverse (b)

Step 3: (c)

Step 4: Combine (a), (b), and (c) and simplify.

Since the given equation is in 1 mole, then divide through by 2

Therefore, ΔH for the given reaction is +12.2 kJ

Answer: Al₂O₃

Explanation:

Answer: 3 slowest reaction of the squence

Explanation:

The order of reaction is obtained from the slowest step in the reaction.

An elementary reaction refers to any reaction that takes place in one reactive encounter. On the other hand, a multistep reaction occurs in several steps and involves multiple reactive encounters.

The rate determining step in a multistep reaction is the slowest step in the reaction sequence. The order of reaction is obtained from this slowest step in the reaction.

Learn more: https://brainly.com/question/6505878

Answer:

A

Explanation:

195.49 g K x 1 mole / 39.01 g x 6.022 x 10^23 atoms/mole = 30.11 x 10^23 = 3.011 x 10^24

The number of K atoms present in 195.49 grams of K is 3.0110 × 10²⁴ atoms. The correct option is a 3.0110 x 10²⁴.

From the question,

We are to determine the number of K atoms present in 195.49 grams of K.

First, we will determine the number of moles K present

Using the formula,

\(Number\ of\ moles = \frac{Mass}{Atomic\ mass}\)

Atomic mass of K = 39.0983 g/mol

Number of moles of K present = \(\frac{195.49}{39.0983}\)

Number of moles of K present = 4.99996 moles

Number of moles of K present ≅ 5 moles

Now, for the number of atoms present

From the formula

Number of atoms = Number of atoms × Avogadro's constant

Number of K atoms present = 5 × 6.022 × 10²³

Number of K atoms present = 5 × 6.022 × 10²³

Number of K atoms present = 30.11 × 10²³

Number of K atoms present = 3.0110 × 10²⁴ atoms

Hence, the number of K atoms present in 195.49 grams of K is 3.0110 × 10²⁴ atoms. The correct option is a 3.0110 x 10²⁴.

Learn more on Stoichiometry here: https://brainly.com/question/16505596

Answer

B. Oil is nonpolar, but water is polar.

Explanation

Water is held together by hydrogen bonds. Hence water is a polar molecule. Oils and fats do not have any polar part and so for them to dissolve in water they would have to break some of water hydrogen bonds.

So, non-polar molecules (e.g oil) can only mix well with other non-polar molecules and not with polar molecules like water. Therefore, this explains why oil doesn't mix well with water.

The correct answer is: B. Oil is nonpolar, but water is polar.

Element: Carbon

Symbol: C

Mass of 1 mole: 12

Number of particles: 6.02x10^23

Number of moles: 1

Mass of sample (g): 12

Element: Carbon

Symbol: C

Mass of 1 mole: 12

Number of particles: 1.2x10^24

Number of moles: 2

Mass of sample (g): 24

Element: Carbon

Symbol: C

Mass of 1 mole: 12

Number of particles: 1.8x10^24

Number of moles: 3

Mass of sample (g): 36

Element: Carbon

Symbol: C

Mass of 1 mole: 12

Number of particles: 3.01x10^23

Number of moles: 0.5

Mass of sample (g): 6

Element: Carbon

Symbol: C

Mass of 1 mole: 12

Number of particles: 1.505x10^23

Number of moles: 0.25

Mass of sample (g): 3

Element: Magnesium

Symbol: Mg

Mass of 1 mole: 24.3

Number of particles: 6.02x10^23

Number of moles: 1

Mass of sample (g): 24.3

Element: Silicon

Symbol: Si

Mass of 1 mole: 28

Number of particles: 3.01x10^23

Number of moles: 0.5

Mass of sample (g): 14

Element: Neon

Symbol: Ne

Mass of 1 mole: 20

Number of particles: 6.02x10^22

Number of moles: 0.1

Mass of sample (g): 2

Element: Iron

Symbol: Fe

Mass of 1 mole: 55.9

Number of particles: 1.8x10^24

Number of moles: 3

Mass of sample (g): 167.7

The dissociation  constant of the base : 7.4 x 10⁻⁴

Butylamine, C4H9NH2 Is A Weak Base

Kb is the dissociation  constant of the base.​

LOH (aq) ---> L⁺ (aq) + OH⁻ (aq)  

\(\rm Kb=\dfrac{[L][OH^-]}{[LOH]}\)

[OH⁻] for weak base can be formulated :

\(\tt [OH^-]=\sqrt{Kb.M}\)

pH of solution : 12

pH+pOH=14, so pOH :

14-12 = 2, then :

\(\tt [OH^-]=10^{-pOH}\\\\(OH^-]=10^{-2}\)

the the dissociation  constant (Kb) =

\(\tt 10^{-2}=\sqrt{Kb.0.15}\\\\10^{-4}=Kb\times 0.15\\\\Kb=\dfrac{10^{-4}}{0.15}=6.6\times 10^{-4}\)

Or you can use from ICE method :

C4H9NH2(aq) + H2O(l) ⇌ C4H9NH3+(aq) + OH-(aq)

0.15

x                                                x                        x

0.15-x                                        x                        x

\(\tt Kb=\dfrac{x^2}{0.15-x}\rightarrow x=[OH^-]\\\\Kb=\dfrac{10^{-4}}{0.15-10^{-2}}=7.14\times 10^{-4}\)