How many liters of ammonia, measured at STP, are produced when 28.0 grams of nitrogen is completely consumed?
N2(g) + 3 H2(g) → 2 NH3(g)

A.
11.2

B.
44.8

C.
22.4

D.
5.60

The energy needed to change the temperature of 1 g of water by 1 °C is 0.415 J. Then the energy needed to change the temperature of 50 g of water by 15 °C is 311.25 J.

The specific heat capacity of a substance is the heat energy needed to increase the temperature by 1 °C per one gram of the substance. The specific heat of water is 0.415 J/g °C.

Hence, the energy needed to change the temperature of 1 g of water by 1 °C is 0.415 J. The energy needed to change the temperature can be found using the calorimetric equation as follows:

Q = m c ΔT

Here m = 50g

c = 0.415 J/g °C.

ΔT = 15 °C.

then q= 50 g ×15 °C ×0.415 J/g °C

          = 311.25 J.

Therefore, 311.2 J of energy needed to change the temperature of 50 g of water by 15 °C.

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Answer:

Sorry I’m late but it’s Angle and Number I ensure you

Explanation:

Answer: Angle and Number

Explanation:

A chemist is studying the following equilibrium, which has the given equilibrium constant at a certain temperature: N2(g)+ 2H2O(g)⇌ 2NO(g)+ 2H2(g) =Kp×2.10−1.He fills a reaction vessel at this temperature with 14.atm of nitrogen gas and 26.atm of water vapor.Use this data to answer the questions in the table below:-Can you predict the equilibrium pressure of H2, using only the tools available to you within ALEKS? yes or no.-If you said yes, then enter the equilibrium pressure of H2 aright.

Water vapor, water vapour or aqueous vapor is the gaseous phase of water. it is one nation of water inside the hydrosphere. Water vapor can be made from the evaporation or boiling of liquid water or from the sublimation of ice. Water vapor is obvious, like maximum materials of the atmosphere.[4] under usual atmospheric conditions, water vapor is continuously generated by way of evaporation and eliminated by using condensation. it's far much less dense than most of the opposite constituents of air and triggers convection currents which could lead to clouds.

Being a factor of Earth's hydrosphere and hydrologic cycle, it's miles mainly plentiful in Earth's ecosystem, in which it acts as a greenhouse fuel and warming remarks, contributing greater to general greenhouse impact than non-condensable gases together with carbon dioxide and methane. Use of water vapor, as steam, has been essential for cooking, and as a chief aspect in electricity production and transport systems for the reason that business revolution.

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Answer:

See the explanation

Explanation:

In this question we have to take into account that we have to get the same amount of atoms on both sides, so:

Reaction 1

\(BaCl_2~+~H_2SO_4~=>~BaSO_4~+~2HCl\)

We have 1 Ba, 2 Cl, 2 H and 4 O on both sides

Reaction 2

\(Ca(OH)_2~+~CO_2~=>~CaCO_3~+~H_2O\)

We have 1 Ca, 2O, 2 H and 1 C on both sides

Reaction 3

\(2Al~+~3CuCl_2~=>~2 AlCl_3~+~3Cu\)

We have 2 Al, 3 Cu, and 3 Cl on both sides

Reaction 4

\(2SO_2~+~O_2~=>~2SO_3\)

We have 2 A and 6O on both sides

Reaction 5

\(2NH_3~+~3CuO~=>~3Cu~+~N_2~+~3H_2O\)

We have 2 N, 3 H, 3 Cu and 3O on both sides.

I hope it helps

The final electron acceptor in aerobic respiration is oxygen (O2).The electron transport chain (ETC) in cellular respiration relies on a final electron acceptor to help oxygen get reduced into water. This is why oxygen is considered the final electron acceptor in cellular respiration.

During cellular respiration, glucose is broken down into pyruvate. Pyruvate is then transformed into acetyl CoA and enters the citric acid cycle, where it is oxidized and generates ATP, NADH, and FADH2. The final stage of aerobic respiration involves the electron transport chain, in which electrons from NADH and FADH2 are passed through a series of proteins and coenzymes in the inner mitochondrial membrane, ultimately reducing oxygen to form water.

This process is known as oxidative phosphorylation.In conclusion, the final electron acceptor in aerobic respiration is oxygen (O2), and carbon dioxide is generated in the link reaction (pyruvate oxidation) and the citric acid cycle.

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Answer:

The answer is 144 mol.

Explanation:

"72 mol of oxygen will form only 144 mol of water, and 10 mol of hydrogen remain in excess, so the limiting reactant is oxygen and hydrogen is in excess."

The molar mass of the unknown diprotic acid is 101.0 g/mol.


To find the molar mass of the unknown diprotic acid, we first need to calculate the number of moles of the acid used in the titration. We can do this using the equation:

moles of acid = (volume of base) x (molarity of base)

Plugging in the given values, we get:

moles of acid = (17.42 mL) x (0.1 mol/L)
moles of acid = 0.001742 mol

Since we know that the acid is diprotic (meaning it can donate two protons), we can assume that the number of moles of acid used in the titration is equal to half the number of moles of acid molecules present. Therefore:

moles of acid molecules = 0.001742 mol / 0.5
moles of acid molecules = 0.003484 mol

Now we can use the given mass of the acid (0.101 g) and the number of moles of acid molecules (0.003484 mol) to calculate the molar mass of the unknown acid.

molar mass = mass / moles
molar mass = 0.101 g / 0.003484 mol
molar mass = 101.0 g/mol

To find the molar mass of the unknown diprotic acid, you need to use the information provided from the acid-base titration.


1. First, calculate the moles of the base (NaOH) used in the titration:
Moles of NaOH = (volume in L) × (concentration in mol/L)
Moles of NaOH = (17.42 mL × 0.001 L/mL) × 0.1 mol/L = 0.001742 mol

2. Determine the moles of the unknown diprotic acid:
Since the unknown acid is diprotic, it reacts with 2 moles of NaOH per 1 mole of acid.
Moles of unknown acid = moles of NaOH ÷ 2
Moles of unknown acid = 0.001742 mol ÷ 2 = 0.000871 mol

3. Calculate the molar mass of the unknown diprotic acid:
Molar mass = (mass of acid in g) ÷ (moles of acid)
Molar mass = 0.101 g ÷ 0.000871 mol = 119.43 g/mol

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B. 50kj, is the energy liberated from the air or the walls of the container. The quantity of heat emitted by one component in a closed system equals the amount of heat absorbed by other components. Released Q equals absorbed Q.

Energy cannot be generated or destroyed, according to the definition of the law of conservation of energy, but it may be transformed from one form into another. The environment must release the same amount of heat that the chemical reaction absorbs into the surrounding space. The total heat emitted by the environment is equal to the total heat absorbed during the chemical process. Heat transfer's overall net change is zero. The energy consumed by the chemical processes is equivalent to 50 Kj, thus the energy released from the air, or the container walls would be equal to that.

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Complete Question:

a chemical reaction is carried out in a closed container. the energy absorbed by the chemical reaction is 50 kj. what is the energy liberated from the air or the walls of the container?

A. 25kj

B. 50kj

C. 75kj

D. 100kj

Answer:

C

Explanation:

because when rocks break down they can form and once they form they can make more and even bigger rocks hopes this helps.

The formula 4CH₄ represents option C) 4 molecules, each containing a carbon atom and 4 hydrogen atoms. The "4" outside the formula indicates that there are four of these molecules present.

The formula for methane gas is CH₄, which means that a single molecule of methane contains one carbon atom and four hydrogen atoms. When we write 4CH₄, the "4" outside the formula indicates that there are four molecules of CH₄ present. So, there are a total of four carbon atoms and sixteen hydrogen atoms in this scenario, but they are distributed across four molecules of CH₄.

Therefore, option B is incorrect. Option A is also incorrect because there is only one carbon atom in each molecule of CH₄. Option D is incorrect because methane is an organic compound with covalent bonds.

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Answer:

True

Explanation:

It is true because heat is released when a gas changes to a liquid.

Answer:

True

Explanation:just took the test

Explanation:

LiCl2 3 M =

in sol. 1 L there is LiCl2 3 mol

if sol. 0.5 L there is LiCl2 0.5×3 = 1.5 mol

LiCl2 = 6.9 + 35.5(2)

= 6.9 + 71

= 77.9 g

Answer:

63.52g of LiCl are in a 3.0 molarity solution of 0.5L

Explanation:

Moles = Molarity x Volume

Molarity = 3.0 mol/L

Volume = 0.5L

Moles = (3.0) x (0.5)

Moles = 1.5

In order to find the grams dissolved in the solution, we must first find the molar mass of Lithium Chloride (LiCl).

Molar mass of LiCl = (6.9) + (35.45) = 42.35g/mol

Now we multiply the moles by the molar mass of LiCl to get the grams of LiCL dissolved in the solution.  

1.5 * 42.35 = 63.52g of LiCl

Answer:

Explanation:

As described in the question, autism is a disability that arises from a disorder in the central nervous system which is actually characterized by abnormality in the brain structure and then function. Autism is known for symptoms such as challenges with communication and interaction and some obsessive behaviors. While there is generally no known scientific cause for autism but trends have suggested that vaccination in young children causes autism.

However, genes could also be involved in this phenomenon because there have been reports of unusual genetic sequence in children that have autism. Hence, there is a possibility that vaccination actually triggers this genetic sequence which is then expressed as autism in the children.

Please note this isn't a scientific fact and just a possibility as requested in the question.

The pH dependence of the protonation state of glu487 is most likely responsible for the change in MP activity.

As the Glu487 have deprotonation, the pH becomes high. According to the pH-dependence of MP activity, activity reduces at both low and high pH levels. The main reason for decreased activity at low pH and high pH is the protonation of functional groups, respectively, and deprotonation of functional groups. According to the question, before being attacked by a nucleophile the substrate is protonated by Glu487 . The pKa of the side chain is always much greater in the enzyme active site than it is in solution to act as a Bronsted acid during catalysis ; otherwise, it would exist in the deprotonated form in the active site. If the pH elevated enough than there occurs the change in the protonation.

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Answer:

28.17

Explanation:

the formula for density is mass/volume

84.5/3=28.17

hope this helped

have a nice day!!

The % ee (enantiomeric excess) of the mixture can be calculated as 7.8%.

Enantiomeric excess (% ee) is a measure of the purity of a chiral compound or mixture, indicating the percentage of one enantiomer present in excess over the other. To calculate % ee, we need the observed rotation value and the specific rotation of the pure enantiomer. The formula for % ee is:

% ee = (observed rotation / specific rotation) × 100

The observed rotation is 0.78 and the specific rotation is not provided. However, if we assume a specific rotation of 1 (arbitrary units), we can calculate a relative % ee:

% ee = (0.78 / 1) × 100 = 78%

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The net ionic equation for the equilibrium involving hexaaquacobalt(II) is Co(H2O)62+ ⇌ Co(H2O)5(OH)2+ + H+ this net ionic equation is Hexaaquacobalt(II) is a complex ion with the formula [Co(H2O)6]2+.

In water, this ion can undergo hydrolysis, which means it reacts with water to form a new ion that contains hydroxide ions (OH-). The net ionic equation shows only the species that are involved in the reaction and have undergone a chemical change. In this case, the Co(H2O)62+ ion loses one H2O molecule to form the Co(H2O)5(OH)2+ ion and releases one H+ ion. The Co(H2O)5(OH)2+ ion is the conjugate acid of the Co(H2O)62+ ion and the H+ ion is the conjugate base of water.

Start by writing the formula for hexaaquacobalt (II), which is [Co(H2O)6]²⁺. This complex ion consists of a cobalt(II) ion, Co²⁺, surrounded by six water molecules. The equilibrium process involves the exchange of one water molecule with a hydroxide ion (OH⁻) to form the [Co(H2O)5OH]⁺ complex ion. The dissociated water molecule releases a hydrogen ion (H⁺) into the solution. Write the balanced chemical equation for this process Co(H2O)6]²⁺ (aq) <=> [Co(H2O)5OH]⁺ (aq) + H⁺ aq .

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Answer:

Explanation:

Variation allows some individuals within a population to adapt to the changing environment. ... Some new alleles increase an organism's ability to survive and reproduce, which then ensures the survival of the allele in the population.

The mass of a substance is the product of its density and volume. Thus, the   mass of the dissolved solids with a density of 125 mg/dm³ with a volume of 250 cm³ is 31.25 mg.

Density of a substance is the measure of its mass per unit volume. Thus it describes how much denser the substance is in a given volume. Mathematically it is the ratio of mass to the volume.

Density of a substance depends on the mass, volume, bond type, temperature and pressure. The ratio of density of a substance with the density of water is called its specific gravity.

It is given that the density of the dissolved solids is 125 mg/dm³ and the volume is 250 cm³ or 0.25  dm³. Thus the mass can be calculated as follows:

density = mass/volume

 mass   = density × volume

             = 0.25  dm³  ×  125 mg/dm³

             = 31.25 mg

Hence, the mass of the dissolved solids in the river wayer is 31.25 M=mg.

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Oki

so heres the formula:

\(2 {2.(0 \frac{ \frac{5 \frac{ \leqslant { {3 {2 { { \frac{5}{?} }^{2} }^{2} }^{2} }^{?} }^{?} }{?} }{?} }{?} }^{2} \)

It appears that the headings in range C2:E2 are a bit inconsistent, and some of them are duplicated. To make it clearer, here are the corrected headings for each column:

Column C: Q1, Q2, Q3, Q4

Column D: Qtr1, Qtr2, Qtr3, Qtr4

Column E: Quarter 1, Quarter 2, Quarter 3, Quarter 4

Please note that Q1, Q2, Q3, and Q4 in column C represent the first quarter, second quarter, third quarter, and fourth quarter, respectively. Qtr1, Qtr2, Qtr3, and Qtr4 in column D represent the same quarters but are abbreviated as "Qtr" instead of "Quarter". Finally, the headings in column E spell out the word "Quarter" in full.

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Answer:

Ice wedging

Explanation:

The rocks crack fill with water and then expand

Epsom salts, a strong laxative used in veterinary medicine, is a hydrate, which means that a certain number of water molecules are included in the solid structure. The formula for Epsom salts can be written as MgSO₄. 7 H₂O. The value of a is 7.

To calculate the molar mass first we have to add the atomic mass of the elements.

Molar Mass of H₂O = 1 × 2 + 16

                                = 18 g/mol

Molar Mass of MgSO₄ = 24 + 32 + 4 × 16

                                    = 24 + 32 + 64

                                    = 120 g/mol

Mass of water = Mass of MgSO₄. xH₂O - MgSO₄

                       = 5.061 g - 2.472 g

                       = 2.589 g

To find the number of moles use this formula

Number of moles = Given Mass / Molar Mass

Given mass of MgSO₄ = 2.422

Molar mass of MgSO₄ = 120

Moles of MgSO₄ = Given mass / Molar mass

                                               = 2.422 / 120

                                               = 2.05 × 10⁻² moles

Moles of H₂O = Given Mass / Molar mass

                       = 2.589 / 18

                       = 14.38 × 10⁻² moles

Number of MgSO₄ = 2.05 × 10⁻² moles / 2.05 × 10⁻² moles

                               = 1

Number of H₂O = 14.38 × 10⁻² moles  / 2.05 × 10⁻² moles

                           = 7

Therefore the hydrate molecule is MgSO₄. 7 H₂O. The value of a is 7.

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Answer: 3.7926x1024 O atoms

One of the following is an Arrhenius base NH2OH. The correct option is B.

The Arrhenius base is the compound that gives -Oh ions in the water after dissociation of the electrolyte. For example NaOH, KOH, NH4OH, etc.

Arrhenius base and acids can also explain the neutralization of the reaction and give information about the hydronium ion in water.

Therefore, The correct option is B. One of the following is an Arrhenius base NH2OH.

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The most accurate value for the boiling point of water is about 102°.

The term accuracy refers to the fact that the value is close to the accepted or the true value. The term precision refers to how closely bound together the values in a replicate measurement are.

Having said that, we can see that the most accurate value for the boiling point of water is about 102°. In the case of second question, the table is not shown hence the question can not be answered.

For the third question, we know that the value of the load that the roller coaster can carry is 1686.5 kg, when the sign says that the roller coaster can carry as much as 1700 kg, the roller coaster could become overloaded and become harder to move.

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Ionization energy : the minimum amount of energy demands to detach an electron from an isolated atom.

Ionization energy also known as potential energy.

The charge of the nucleus increases from side to side in a row and so there is an increase in the attraction in the middle of the nucleus and the surrounding electrons.  As we move from side to side in a periodic table from left to right, the nuclear charge increases. This is because of increasing nuclear charge, which concludes in the topmost electron being more strongly leap to the nucleus.

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Answer: As4010 is the Molecular Formula of Arsenic oxide. its Molecular Weight is 459.68.

hope its help you

have a great day keep smiling be happy stay safe.

The student's claim of 4.64 × 10^24 molecules is incorrect, and the correct number of molecules of ammonium acetate used in the reaction is 6.022 × 10^22 molecules.

The mistake the student made is assuming that the molar mass of ammonium acetate directly corresponds to the number of molecules. However, the molar mass of a substance represents the mass of one mole of that substance, not the number of molecules.

To determine the correct number of molecules of ammonium acetate used in the reaction, we need to use Avogadro's number, which relates the number of particles (atoms, molecules, etc.) in one mole of a substance.

Avogadro's number is approximately 6.022 × 10^23 particles/mol. Given that the student used 0.100 mol of ammonium acetate, we can calculate the correct number of molecules by multiplying the number of moles by Avogadro's number:

Number of molecules = (0.100 mol) × (6.022 × 10^23 molecules/mol)

Performing the calculation, we find that the correct number of molecules of ammonium acetate used in the reaction is 6.022 × 10^22 molecules.

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