air contains 360 ppmv of carbon dioxide. your class room air ducts supplies air such that the concentration of co2 never exceeded 600 ppm, when you may feel tired or sleepy. your room is (600 cubic meter) designed for 40 student capacity and consider room temperature 22 oc and 0.976 atm. on average human produces 900 grams of co2 per day. answer the following (a) what will be the required flow rate to achieve this design at steady state. (b) consider the room was fiiled with ambient air before the start of class, when the room carbon dioxide concentration reaches 400 ppm with the flow rate obtained in part a? (c) when steady state will be achieved?

Answer:

true

Explanation:

Answer:

true

Explanation:

Hope this helps

**Answer: D.** Because the reaction rate doubles, when the temperature is increased by a factor of two, the activation energy for this reaction is positive and the rate constant increases.

In this experiment, the reaction rate doubles when the temperature is increased from 300K to 600K. This suggests that the **activation energy** for the reaction is positive, as an increase in temperature leads to an increase in the reaction rate. As the temperature increases, the average kinetic energy of the molecules also increases, which results in more molecules having sufficient energy to overcome the activation energy barrier, thereby increasing the **rate constant**. This relationship between temperature and reaction rate is described by the Arrhenius equation. The other options provided do not accurately reflect the relationship between temperature, reaction rate, and equilibrium constant for this experiment.

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The best explanation for the phenomenon of a prism dispersing white light into a spectrum is that different frequencies of visible light move at different speeds inside the prism. This is known as the process of refraction.

The correct option is D.

Dispersion of light is the separation of white light into its component colors.

When white light enters a prism, the different colors (wavelengths) that make up white light refract, or bend, at slightly different angles as they pass through the prism.

This is due to the fact that different colors of light have different refractive indices or the degree to which light bends as it passes through a medium. This means that each color of light is separated, forming a spectrum of colors that ranges from red to violet.

This effect can be seen in everyday life, such as in a rainbow, which is formed when sunlight is refracted by water droplets in the air.

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Answer:

2C₄H₁₀ + 13O₂---> 8CO₂ + 10H₂O

Explanation:

This is a type of combustion reaction which produces carbon dioxide and water:

C₄H₁₀ + O₂---> CO₂ + H₂O

1) There are 10 hydrogens on the left and 2 hydrogens on the right so put a 5 in front of the H₂O because 5 × 2 = 10

now we have: C₄H₁₀ + O₂---> CO₂ + 5H₂O

2) C₄H₁₀ + O₂---> CO₂ + 5H₂O

There are 4 carbons on the left and 1 carbon on the right, so put a 4 in front of CO₂, now we have:

C₄H₁₀ + O₂---> 4CO₂ + 5H₂O

3) C₄H₁₀ + O₂---> 4CO₂ + 5H₂O

There are 2 oxygens on the left and 13 oxygens on the right (In 4CO₂ 4 × 2 = 8 oxygens and in 5H₂O there are 5 oxygens, 8 + 5 = 13 oxygens). To balance this put 6.5 in front of the O₂ because 6.5 × 2 = 13

now we have:

C₄H₁₀ + 6.5O₂---> 4CO₂ + 5H₂O

we cannot have half of a molecule, so multiply the whole equation by 2 which gives us:

2C₄H₁₀ + 13O₂---> 8CO₂ + 10H₂O

Answer:

There are legal and ethical restrictions regarding human cloning.

Explanation:

Answer:

Scientists clone banana plants and not humans because there are legal and ethical restrictions regarding human cloning.

\(hope \: this \: helped \: you \: \)

The number of mole of sodium hydroxide, NaOH present in 20 grams is 0.5 mole

The number of mole of sodium hydroxide, NaOH present in 20 grams can be obtained as illustrated below:

Mole of sodium hydroxide = mass / molar mass

= 20 / 40

= 0.5 mole

Thus, we can conclude from the above calculation that the mole of sodium hydroxide in the sample is 0.5 mole

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Answer:both sound energy and thermal energy are important in our daily life.

Explanation:

The points where thermal andsound energy are analyzed determine their importance. Both energy sources have unique advantages and both have uses.

The energy produced by the movement of objects in an object is called heat. It has many uses such as heating, cooking, electricity generation and driving. Heat plays an important role in our daily lives as well as being important to many industries.On the other hand, the energy associated with the vibration of the medium such as air, water or solids is called acoustic energy. It is kinetic energy for navigation, entertainment and communication. Many scientific and medical applications, including ultrasound and acoustic lifting, rely on energy.Therefore, it goes without saying that one power is more important than the other, because each has a specific use and function. Each force has a different effect depending on the specific situation in which it is used.

Answer:

51.79g Li₃P.

Explanation:

Li has a molar mass of 6.94 g (since there are 3, you multiply it 3 times) and P has a molar mass of 30.97 g. 6.94(3) + 30.97 = 51.79g.

Answer:

asxrsse367721479009qqucinübjpnpnfzdh ilo h

Answer:

Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons. ... And all of them form an anion with a single negative charge. The VIA elements gain two electrons to form anions with a 2- charge.

Explanation: OR

Metallic atoms hold some of their electrons relatively loosely. Consequently, they tend to lose electrons and form cations. Conversely, most nonmetallic atoms attract electrons more strongly than metallic atoms, and so gain electrons to form anions.

Metallic atoms hold some of their electrons relatively loosely. Consequently, they tend to lose electrons and form cations. Conversely, most nonmetallic atoms attract electrons more strongly than metallic atoms, and so gain › cat...

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Answer:

It gains one or more electrons from another atom to become negatively charged.

Explanation:

An atom becomes charged by either gaining or losing electrons, and is called an ion. An atom with less than the normal number of electrons is a positive ion (a cation), and an atom with one or more extra electrons is a negative ion (an anion).

The molecular geometry based on the description of bonding and lone pairs are as follows:

- Three double bonds and no lone pairs of electrons: linear

- Four single bonds and no lone pairs of electrons: tetrahedral

- Two double bonds and no lone pairs of electrons: bent/angular

- Three single bonds and one lone pair of electrons: trigonal pyramidal

- Five single bonds and no lone pairs of electrons: trigonal bipyramidal

- Six single bonds and no lone pairs of electrons: octahedral

- Two single bonds and two lone pairs of electrons: bent/angular

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Answer:

adding an acidic solution

Explanation:

Strong acids dissociate completely in water and the H⁺ ions react with the OH⁻ ions to make H₂O. If we add an acid to our solution of Ca(OH)₂, the acid protons would react with some of the OH⁻ ions and drive the equilibrium to the right. More of the solid Ca(OH)₂ should dissolve.

Answer: I think the right answer is c

Answer:

0.25L or 250Ml

Explanation:

I am not that good but as far as my calculations this must be the answer

Answer:

The answer is D.

Explanation:

Volume (V) = l x w x h

V = 4 x 5 x 1.2

V = 20 x 1.2

V = 24

Density = Mass/Volume  or D = M/V  

D = 85,000/24

D = 3541.66666666

Answer:

123.5 kPa

Explanation:

P2=P1T2/T1

You can check this by knowing that P and T at constant V have a proportional relationship. Hence, this is correct.

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.

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The hydrogen ion concentration of the substance in Vinegar is 1.098 and in case of milk it is 1.871

pH is a measure of how acidic or basic water is. The pH scale actually ranges  from 0 - 14, with 7 being neutral. pHs that are less than 7 indicate that it is  acidic in nature , whereas a pH of greater than 7 indicates that it is  basic in nature. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions present  in the water.

The formula to find pH is as follows;

pH = -log\([H]^{+}\), In the above given question we need to find out the hydrogen ion concentration so we can rearrange the formula as;

\([H]^{+}\) = Antilog pH

In case of Vinegar \([H]^{+}\) = Antilog of 3 ⇒ 1.098

In case of Milk \([H]^{+}\) = Antilog of 6.5 ⇒ 1.871

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The correct answer is e. H2 has greater average speed than argon because it has lower molar mass.

The average speed of gas molecules is directly proportional to the square root of their temperature and inversely proportional to their molar mass. This relationship is described by the root-mean-square speed equation, given by:

v = sqrt((3RT)/M)

where v is the average speed of the gas molecules,

R is the gas constant,

T is the absolute temperature,

and M is the molar mass of the gas.

Since hydrogen gas (H2) has a lower molar mass than krypton gas (Kr), its average speed will be greater at the same temperature. The same applies to argon gas, which also has a higher molar mass than H2. Therefore, option e is correct.

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The Aswan Dam affected electricity generation in Egypt by bringing electricity to regions that had never had it before. The dam, which is located on the Nile River, was constructed in the 1960s to control flooding, provide irrigation water, and generate hydroelectric power.

The Upon completion, the dam allowed for increased electricity production, which was crucial for Egypt's growing population and industrialization. By harnessing the power of the Nile River, the Aswan Dam created a more reliable source of electricity for the country. This hydroelectric power was cleaner and more sustainable than other methods, such as coal or oil, which were previously used in Egypt. The dam's construction also allowed for the expansion of the national power grid, which brought electricity to rural areas that had never had access to it before. As a result, the Aswan Dam significantly contributed to the improvement of living conditions and economic growth in Egypt by providing a stable and reliable source of electricity. However, it did not make electric power less stable, nor did it disrupt the main source of electricity. The Aswan Dam remains a vital component of Egypt's energy infrastructure and continues to generate a significant portion of the country's electricity.

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Explanation:

Mass and volume are two units used to measure objects. Mass is the amount of matter an object contains, while volume is how much space it takes up.

Example: A bowling ball and a basketball are about the same volume as each other, but the bowling ball has much more mass.

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Answer: 7.81 mol HgO (How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2?)

Explanation:

The behavior you described can be explained by the difference in the nature of the solvents and their ability to facilitate ionization and conduct electricity.

What is ionization?

Ionization refers to the process by which a neutral atom or molecule gains or loses one or more electrons, resulting in the formation of charged particles called ions. This process occurs when atoms or molecules interact with external factors such as heat, light, or other chemical species.

When hydrochloric acid (HCl) is dissolved in water, it undergoes ionization. Water molecules are polar, meaning they have a partial positive charge on the hydrogen atom and a partial negative charge on the oxygen atom. HCl, being a strong acid, readily donates a proton (H+) to a water molecule, forming hydronium ions (H3O+). The chloride ion (Cl-) is also present in the solution. These ions, H3O+ and Cl-, are responsible for the conduction of electric current because they can move freely in the solution, carrying electric charges.

In contrast, hexane is a nonpolar solvent. It consists of carbon and hydrogen atoms arranged in a nonpolar covalent bonding. In such a nonpolar environment, HCl molecules do not readily ionize as they do in water. The lack of polar molecules in hexane prevents the dissociation of HCl into ions, resulting in no electric current flow. The chemical bonding in hexane does not provide an environment that promotes the separation of charged species.

Therefore, the ability of a solution to conduct electricity depends on the presence of mobile ions. Polar solvents like water facilitate ionization and create an ionic solution that can conduct electricity, while nonpolar solvents like hexane do not support ionization, resulting in a non-conductive solution.

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Answer:

Atomic Mass of Nitrogen is 14.01

Explanation:

Students are conducting an experiment to see what colors different salts turn when they are burned. Jack dares Rebecca to taste the other salts to see if they taste like regular table salt. She agrees and her mouth starts burning. Rebecca needs to learn how to behave in the class.

When you add salt to a fire, the flame's color will alter. This isn't because the salt is burning; rather, it happens because the flame's heat affects the energy of the salt's electrons, which causes photons of light to be released. When salt is "burned," a golden flame is frequently visible.

High blood pressure is known to increase the risk of stroke and other health issues, and it is also known to increase the chance of burning in salt. High salt consumption has also been linked in several studies to deteriorating brain function. So, if this occurs, plan for brain surgery and a dedicated teacher to assist the student with wiping and peeling bananas.

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The concentration of Cd2+ ion in the 0.022 M Cd(NO3)2 solution that is also 1.0 M NH3 at this temperature,

Kf for Cd(NH3)42+ is 1.0 × 10−5 M.

The given constants are:

Temperature (T) = not given

Kf (Formation constant) for

[Cd(NH3)4]2+ = 1.6 x 10^7

Kf = (4)2 / ([Cd2+][NH3]4) [Cd2+]

= (4)2 / (Kf [NH3]4)

The given values are:

Initial concentration of Cd(NO3)2 solution = 0.022 M

Initial concentration of NH3 solution = 1.0 MCd2+ is a part of complex ion, Cd(NH3)42+.

Cd2+ forms a complex ion by reacting with four NH3 molecules.  

Cd2+ + 4NH3 ⇌ Cd(NH3)42+

In this reaction, Cd2+ ion reacts with four NH3 molecules to form Cd(NH3)42+ complex ion.

Cd2+ has an equilibrium constant (Kf) of 1.6 x 107 for the complex ion formation.

Cd2+ and NH3 react to form the complex ion, Cd(NH3)42+ as follows:

[Cd2+][NH3]4 ⇌ [Cd(NH3)4]2+

We know that

Kf = ([Cd(NH3)4]2+ ) / ([Cd2+][NH3]4)

Kf = 1.6 × 107

= [Cd(NH3)4]2+ / ([Cd2+][NH3]4) [Cd2+]

= 4^2 / (Kf [NH3]4)[Cd2+]

= (4^2) / (1.6 × 107 × 1.0^4)[Cd2+]

= 1.0 × 10−5 M

Therefore, the concentration of Cd2+ ion in the 0.022 M Cd(NO3)2 solution that is also 1.0 M NH3 at this temperature,

Kf for Cd(NH3)42+ is 1.0 × 10−5 M.

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The law of mass action best fits that the law of mass action is a model that emphasizes the energy and orientation of molecular collisions to explain and predict reaction kinetics.

The relationship between concentrations of reactants and products in a chemical reaction at equilibrium is described by the law of mass action, which is a fundamental concept in chemistry. According to this, the rate of a chemical reaction is inversely related to the product of the reactant concentrations, where each reactant concentration is increased to a power equal to its coefficient in the balanced chemical equation.

This rule also serves as the foundation for a kinetic model that forecasts the speeds of chemical reactions by taking into account the energy and orientation of molecular collisions. It aids in the explanation of how temperature, concentration, and other variables affect response speeds.

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Answer:

Explanation:

3. The number of electrons and neutrons in an atom are 13 and 14, respectively. Find out the mass number, atomic number, valency, and symbol of the element.

For a neutral atom. number of protons =number of electrons=13

so since atomic number is the number of protons =13

mass number = protons + neutons =14+13 = 27

atomic number 13 is Aluminum (AL-(see periodic table)

The electronic structure for 13 electrons is 1s2s2p63s23p1

so Al has 3 electrons which are VALIENT and can react and when it loses the 3 it will have  CHARGE OF +3

No, a polar covalent bond will not form between the two nitrogen atoms in nitrogen gas (N2).

This is because nitrogen gas is a diatomic molecule and its chemical structure is symmetrical, meaning that the two nitrogen atoms have the same electronegativity. Electronegativity refers to the ability of an atom to attract electrons towards itself in a chemical bond. Since both nitrogen atoms have the same electronegativity, they will share the electrons equally, forming a nonpolar covalent bond.
A polar covalent bond forms when two atoms with different electronegativities share electrons unequally. In such a bond, one atom has a higher electronegativity than the other and attracts the shared electrons closer to itself, resulting in a partial positive charge on one atom and a partial negative charge on the other. This unequal sharing of electrons gives rise to a dipole moment in the molecule.
In summary, a polar covalent bond will not form between the two nitrogen atoms in nitrogen gas (N2) because both nitrogen atoms have the same electronegativity, resulting in equal sharing of electrons and a nonpolar covalent bond.

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