Carbon monoxide (CO) is a poisonous gas because it binds very strongly to the oxygen carrier hemoglobin in blood. A concentration of 8.00 × 102 ppm by volume of carbon monoxide is considered lethal to humans. Calculate the volume in liters occupied by carbon monoxide in a room that measures 20.35 m long, 13.17 m wide, and 17.25 m high at this concentration.
Volume of CO in the room:

Answer:

6.2 × 10^-2

Explanation:

Given the reaction:

------------2N2O(g) N2H4(g) <---> 3N2(g) 2H2O(g)

Initial: N2O = 0.1, N2H4 = 0.25-- 0 - - - - - 0

Then: N20 = -2x, N2H4= - x - - - +3x, +2x

Equ : 0.1 - 2x ; 0.25 - x ; +3x ; +2x

At equilibrium :

Add both:

N2O = 0.1 - 2x ;

N2H4 = 0.25 - x;

3N2 = 3x

2H2O = 2x

Moles of N2O at equilibrium = 0.059

Then;

0.1 - 2x = 0.059

-2x = 0.059 - 0.1

-2x = - 0.041

x = 0.041 / 2

x = 0.0205

Moles of N2 present at equilibrium ;

3N2 = 3x

3N2 = 3(0.0205)

= 0.0615

= 0.062 = 6.2 × 10^-2

An average brightness was calculated for each length of graphite tested to get a better understanding of the relationship between the length of the graphite and the brightness of the line it produced.

Graphite has many uses in various industries. Some of its uses include: Pencils, Lubricants, Refractories, Batteries, Electrodes, Nuclear reactors, Aerospace industry.

By calculating the average, it is possible to see if there is a trend in the data and if longer or shorter lengths of graphite produce brighter or duller lines. This information can be useful in determining the best length of graphite to use for a particular task or project.

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There are approximately 0.00493 moles of N in 0.217 g of N2O.

To determine the number of moles of N in 0.217 g of N2O, we need to convert the mass of N2O to moles using the molar mass of N2O, which is 44.0128 g/mol. We can use the formula:

moles = mass / molar mass

So, moles of N = 0.217 g / 44.0128 g/mol = 0.00493 mol. Therefore, there are approximately 0.00493 moles of N in 0.217 g of N2O.

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One of the most effective ways to reduce greenhouse gases is using a car powered by fuel cells.

The term greenhouse gases refers to those gases that lead to a rise in the temperature of the earth due to the re-radiation of infrared rays towards the surface of the earth.

It is very important to take vital steps in order to prevent the emission of these gases. One of the most effective ways to reduce greenhouse gases is using a car powered by fuel cells.

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Answer:

Using a car powered by fuel cells

Explanation:
B On Edge

Answer:

Newton's law also states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them.

Explanation:

Answer is A.

Answer:

\(mol=0.0709mol\)

Explanation:

Hello,

In this since one mole equals 6.022x10²³ particles of silver by means of the Avogadro's number, we can compute the moles in 4.27x10²² particles as shown below:

\(mol=4.27x10^{22}particles*\frac{1mol}{6.022x10^{23}particles}\\\\mol=0.0709mol\)

Best regards.

The balanced net iconic equation :

Salt and water are created when an acid and a base interact then Acid-based reaction happens. Because both water and salt are neutral, if an acid and a base react together, they cancel out each other's effects. It is referred to as a neutralization reaction as a result.

An acid-base reaction is a chemical reaction involving an acid and a base.

H+ and OH- ions are produced by bases and acids, respectively, and these ions combine to make water. There are a number of drawbacks to the Arrhenius theory. Because it defines acids and bases in terms of what occurs when compounds dissolve in water, it can only be applied to reactions that take place there.

One or more hydrogen ions, H+, are exchanged between entities that may be neutral (such as H2O) or electrically charged (ions-ammonium, NH4+; hydroxide, OH; or carbonate, CO32); in an acid-base process.

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An acetate buffer would be most effective in maintaining pH within a range of approximately 3.76 to 5.76.

The pH range over which an acetate buffer can effectively maintain pH depends on the pKa of the acid used and the concentration ratio of the acid to its conjugate base (acetate ion). Acetate buffer solutions are commonly prepared using acetic acid (CH3COOH) and sodium acetate (CH3COONa).

The pKa of acetic acid is approximately 4.76. In general, a buffer is most effective when the pH is within one unit of its pKa. Therefore, an acetate buffer would be most effective in maintaining pH within a range of approximately 3.76 to 5.76

Outside this pH range, the buffer may not effectively resist changes in pH, as the concentration of the acid and its conjugate base will be significantly imbalanced. At lower pH values, the acid concentration will dominate, while at higher pH values, the concentration of the acetate ion will dominate, leading to a diminished buffering capacity.

However, it's important to note that the exact pH range over which an acetate buffer can maintain pH effectively may vary depending on the specific concentration and preparation of the buffer solution.

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The label for the activation energy that can be added to the graph below is B. The correct option is C.

The lowest amount of energy that must be absorbed by the reactant molecules in order for their energy to match the threshold energy is known as activation energy.

The activation energy equation is

Ea = E activated complex - E reactant

Finally, since the activation energy is the difference between the energy of the reactants and the activated complex (highest energy point), we can say that the activation energy label would be in the letter B.

Therefore, the correct option is C. B.

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Answer:

Two molecules of hydrogen combine with two molecules of oxygen to form hydrogen peroxide. Hence, its chemical formula is H2O2. It is the simplest peroxide (since it is a compound with an oxygen-oxygen single bond). Hydrogen peroxide has basic uses as an oxidizer, bleaching agent and antiseptic

The north pole of one magnet is near the South pole of the other magnet.

The ends of a magnet are called its poles. One end is called the north pole, the other is called the south pole. If you line up two magnets so that the south pole of one faces the north pole of the other, the magnets will pull toward each other.

20.4 gallons of Isooctane fuel is 117.7786 lb.

1 gallon = 3785 cm3 = 4 quart; 1 pound = 453.6 g.

 So here. 20.4 gallons = 20.4 x 3785 cm³ = 77214 cm³ = 77214 ml

D = m/v  ⇒ mass = density x volume

Given density is 0.6919 g/cm3

Mass = 0.6919 x 77214 = 53424.3666 g

1 g = 1/453.6 lb ⇒ 53424.3666 g =53424.3666 /453.6 lb = 117.7786 lb.

isooctane or iso-octane is also known as 2,2,4-Trimethylpentane,  
being an important component of gasoline, it is  used in relatively large proportions (around 10%) to increase the knock resistance of fuel.
An antiknock agent is a gasoline additive which is  used to reduce engine knocking and also increases fuel's octane rating by raising the temperature and pressure at which auto-ignition occurs.

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By applying the formula y = ( * x) / 1 + ( -1) * x, where "" denotes relative volatility, "x" denotes the mole fraction of the substance in the liquid, and "y" is the mole fraction of the substance distillation in the vapour, you may determine the mole fraction of a chemical in a vapour.

What exactly is the simple distillation mixture?

Definition: A technique for separating mixes in a boiling liquid combination based on differences in their volatilities. After applying heat to a sample mixture, the components are instantly cooled by the action of cold water in a condenser.

In distillation Mcq, what exactly is the distillate?

In distillation, what exactly is the distillate? Explanation: The vapour in a distillation column that is collected, condensed into a liquid, and collected in the collecting flask is referred to as a distillate in the distillation process.

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A complex molecule known as an organic is composed primarily of carbon atoms joined to other elements and/or other carbon atoms.

Although the distinction between "organic" and "inorganic" is disputed, many authors in the field of chemistry believe that any chemical compound that contains carbon-hydrogen or carbon-carbon bonds is considered to be an organic compound. Methane is an example of an organic compound, but opinions on whether carbon halides without hydrogen (such as carbon tetrachloride,  are organic or inorganic vary from author to author.

Millions of organic substances have been identified as a result of carbon's capacity to catenate (form strands with other carbon atoms).

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Answer:

1. The dissolving is endothermic and deltaH is positive

2. A. The bonds in the reactants are stronger than in the products and deltaH is positive

3. I can't see the diagram so I don't know the answer (it's a glitch on my part not yours, my school district blocks images automatically on their rented chromebooks)

4.  A. I, and II only

Explanation:

   When we measure the temperature of a solution, and we notice that the temperature of the water is decreasing, then this is an endothermic reaction..

   The dissolved solute (the "invisible" ions) are absorbing the heat, causing the water around it to be colder.. **Heat moves from hot to cold, so the water is losing it's heat and the dissolving (dissolved solute) is gaining heat, meaning that it is Endothermic.

    When a reaction is endothermic, the energy that is required to break bonds and attractive forces is greater than the energy required to form bonds and attractive forces. This means that the bonds in the reactants are stronger than in the products and deltaH is positive. Since we know that the energy in the reactants is greater, there is more heat in the reactants. This is also why the dissolved solute would be gaining heat.. If the energy of the reactants is stronger, when it breaks, it will release a lot of energy that the dissolved solute will be absorbing.

     Think, heat (q, released or absorbed) is measured in Joules, the higher the Joules, the hotter something will be. So, if the heat (q) is negative, that represents the amount of Joules (heat) being released.  If it is positive, that is the amount being absorbed. So, if heat is being absorbed then deltaH is positive.  

    If the diagram shows the products being at a higher energy level than the reactants, then the diagram shows an endothermic reaction.. If we see that the energy from the products is greater, than the energy of the system increased as it absorbed energy from its surroundings.

If the diagrams shows the reactants being at a higher energy level than the products, then the diagram shows an exothermic reaction.. Think of it this way, if we see that the energy from the reactants was greater, than the energy of the system was originally greater than the surroundings, but now (observing the products), it is not, as energy was lost to the surroundings, making this an exothermic reaction.

    For exothermic reactions, the energy that is required to break bonds and attractive forces is less than the energy required to form bonds and attractive forces.. This means that energy in the products are greater, so as these bonds are broken and energy is released, the surroundings gain energy/heat. This means that the energy is favorable (more stable), the more negative our potential energy (energy of the system) is, the more favorable our process is.

Answer:

24

Explanation:

the total of any 2 sides must be larger than the 3rd side. x is the 3rd side.

8 + x > 16

x > 8

16 + x > 8

x > -8

8 + 16 > x

24>x

x < 24

the second inequality tells us nothing as sides must be positive.

the third side must be between 8 and 24

Answer:

i want go with option 2

Explanation:

The new volume of the gas whose pressure was changed would be = 40 milliliters.

The initial volume(V1)of the gas= 20ml

The initial pressure(P1) = 4 atm

The final pressure(P2) = 2 atm

The final volume(V2) = ?

Using the general gas formula;

P1V1 = P2V2

V2 = P1V1/P2

= 4×20/2

= 40ml

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Considering the definition of pH, the pH is 6.35 and the solution is acidic.

pH is the Hydrogen Potential and it is a measure of acidity or alkalinity. pH indicates the amount of hydrogen ions present in a solution or substance.

Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:

pH= - log [H⁺]

The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.

In this case, being [H⁺]=4.5×10⁻⁷ M, you can replace this value in the definition of pH:

pH= -log (4.5×10⁻⁷ M)

Solving:

pH= 6.35

Finally, the pH is lower than 7, the solution is acidic.

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Answer:

The answer is 4

Explanation:

=1+98−97+4−3+2−1

=99−97+4−3+2−1

=2+4−3+2−1

=6−3+2−1

=3+2−1

=5−1

=4

De Broglie contributed to the development of the modern model of atoms by describing the wave properties of particles. Option E.

Louis de Broglie was a French physicist who made significant contributions to the development of quantum mechanics.

In his doctoral thesis, he proposed that particles, such as electrons, have both particle-like and wave-like properties. This idea became known as wave-particle duality and laid the foundation for the development of the modern model of the atom.

According to de Broglie's theory, particles can exhibit wave-like behavior and have a wavelength that is inversely proportional to their momentum.

This theory was later experimentally confirmed in a series of experiments that demonstrated the diffraction of electrons and other particles.

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Answer:

1) Acid

2) heat

Explanation:

Dehydration is a type of chemical reaction in which water is removed from an alkanol to yield one or more alkenes.

The reaction normally commences with a protonation of the -OH group by a proton from the acid. Water is always a good leaving group so it quickly departs creating a carbocation. The removal of a proton yields the alkene.

The major product is the one in which there is greater substitution around the C=C double bond.

Answer:

tetrafluoroethane

Explanation:

Its an HCFC, which are the refrigerants that destroy the ozone layer.

Answer:

Freon.

Explanation:

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