What is the correct form of the equilibrium constant for the reaction of hydrogen and oxygen to form water? the equation is:?

Answers

Answer 1

Balanced chemical reaction: 2H₂(g) + O₂(g) ⇄ 2H₂O(g).
K = [H₂O]² / [O₂] · [H₂]².
[H₂O] is equilibrium concentration of water.
[O₂] is equilibrium concentration of molecule of oxygen.
[H₂] is equilibrium concentration of molecule of molecule of hydrogen.
The substances on the right side of the reaction are written at the top of the equilibrium constant expression and those on the left at the bottom.

Related Questions

You need a 45% alcohol solution. on hand, you have a 480 ml of a 40% alcohol mixture. you also have 85% alcohol mixture. how much of the 85% mixture will you need to add to obtain the desired solution?

Answers

x ml of 85% mixture will needed to add

0.40*480 ml alcohol in 480 ml solution (40%)
0.85x alcohol in x ml solution (85%)

0.45(480 + x) in (480 + x)ml 0.45% solution

0.40*480+0.85x =0.45(480 + x)
192+0.85x=216+0.45x
0.85x-0.45x=216-192
0.4x=24
x=24/0.4=60 ml a 45% alcohol solution

What determines the strength of an arrhenius base? give one example each of an aqueous solution of a strong base and an aqueous solution of a weak base?

Answers

The strength of an Arrhenius base determines percentage of ionization of base and the number of OH⁻ ions formed.
Strong base completely ionize in water and gives a lot of hydroxide ions (OH⁻), for example sodium hydroxide: NaOH(aq) → Na⁺(aq) + OH⁻(aq).
Weak base partially ionize in water and gives a few hydroxide ions (OH⁻), for example ammonia: NH₃ + H₂O(l) ⇄ NH₄⁺(aq) + OH⁻(aq).

Final answer:

The strength of an Arrhenius base is determined by its ability to form hydroxide ions in solution, with strong bases fully dissociating and weak bases partially dissociating. Sodium hydroxide (NaOH) is a strong base that dissociates completely, while ammonia (NH3) is a weak base that only partially dissociates.

Explanation:

The strength of an Arrhenius base is determined by its tendency to form hydroxide ions (OH-) in an aqueous solution. This process is described by the reaction B(aq) + H2O(l) ⇒ HB+(aq) + OH-(aq), where B stands for the base and HB+ is its conjugate acid after accepting a proton from water. Strong bases completely dissociate in water, releasing a large amount of hydroxide ions, whereas weak bases only partially dissociate, resulting in a smaller amount of hydroxide ions.

An example of a strong base in aqueous solution is sodium hydroxide (NaOH), which fully dissociates to form Na+ and OH-. An example of a weak base is ammonia (NH3), which only partially dissociates in water, forming ammonium (NH4+) and hydroxide ions.

The relative strength of a base can also be quantified by its base-ionization constant (Kb). A larger Kb value indicates a stronger base, which means a higher concentration of hydroxide ions is produced in solution.

What explains the change in ionization energy that occurs between removing the first and second electrons from an atom

Answers

Options are as follow,

A. The ionization energy decreases because the ratio of the protons to electrons increases.
B. The ionization energy increases because the ratio of the protons to electrons increases.
C. The ionization energy decreases because the ratio of the protons to electrons decreases.
D. The ionization energy increases because the ratio of the protons to electrons decreases.

Answer:
Option-B (The ionization energy increases because the ratio of the protons to electrons increases).

Explanation:
Ionization energy is the amount of energy required to remove one electron from the valence shell of an atom.
Also, first IE is energy required for removing electron from neutral atom, 2nd IE is energy required for is for removing electron from a mono positive atom and so on.
Example:
1st IE of Na is 495.8 kJ/mol

2nd IE of Na is 4562.4 kJ/mol

Second ionization energy is greater because after the removal of first electron the ratio of protons to electrons increases, resulting in more nuclear effect. Also, the second IE is greater because the Na⁺ having noble gas configuration is a stable state, hence more energy is required to knock out electron from it.

Answer:

B. The ionization energy increases because the ratio of the protons to electrons increases.

Explanation:

edg 2021

describe the difference between a monoprotic acid and a triprotic acid. How does a triprotic acid generate hydrogen ions?

Answers

With the Bronsted-Lowry theory of acids and bases, acids donate protons to other substances. A monoprotic acid is an an acid that can only supply one proton (hydrogen). A triprotic acid is an an acid that can supply up to three protons (hydrogens). A triprotic acid get get its hydrogen ions by receiving them from a base.

Final answer:

Monoprotic acids contain one ionizable hydrogen atom, while triprotic acids contain three ionizable hydrogen atoms. Triprotic acids, like phosphoric acid, generate hydrogen ions through stepwise ionization reactions.

Explanation:

A monoprotic acid is an acid that contains only one ionizable hydrogen. Examples of monoprotic acids include hydrochloric acid (HCl) and acetic acid (CH3COOH). On the other hand, a triprotic acid is an acid that contains three ionizable hydrogens. An example of a triprotic acid is phosphoric acid (H3PO4).

When a triprotic acid like phosphoric acid dissociates, it releases hydrogen ions (H+) in a stepwise manner. The acid goes through a series of ionization reactions, each removing one proton. For example, phosphoric acid first donates one hydrogen ion (H+) to form dihydrogen phosphate ion (H2PO4-), then donates a second hydrogen ion to form hydrogen phosphate ion (HPO42-), and finally donates the third hydrogen ion to form phosphate ion (PO43-).

How many moles of oxygen atoms do 1.5 moles of co2 contain?

Answers

1 molecule CO2 has 2 atoms O.
1 mole CO2 has 2 moles O,
1.5 mole CO2 has 2*1.5 mole O=3.0 mole O

Final answer:

1.5 moles of carbon dioxide (CO2) contain 3 moles of oxygen atoms because each CO2 molecule is composed of two oxygen atoms.

Explanation:

The question 'How many moles of oxygen atoms do 1.5 moles of CO2 contain?' involves understanding the composition of a carbon dioxide (CO2) molecule.

Each molecule of CO2 consists of one carbon atom and two oxygen atoms. Therefore, for every mole of CO2, there are two moles of oxygen atoms. To find the number of moles of oxygen atoms in 1.5 moles of CO2, we simply need to multiply 1.5 moles by 2 (the number of oxygen atoms per mole of CO2).

1.5 moles CO2 x 2 moles O per mole CO2 = 3 moles O

Thus, 1.5 moles of CO2 contain 3 moles of oxygen atoms.

A hiker has packed a bag of chips as a snack. At the start of the hike the pressure was 1.5 atm and the temperature was 35*C. At the end of the hike the temperature has dropped to a 0.5*C. What is the pressure at the end of the hike? What would you expect to happen to the bag of chips?

Answers

According to Gay-Lussac's Law the temperature and Pressure are directly proportional to each other if the amount and volume of given gas are kept constant.
Mathematically for initial and final states it is expressed as,

P₁ / T₁ = P₂ / T₂ ----- (1)
Data Given;
P₁ = 1.5 atm

T₁ = 35 °C + 273 = 308 K

P₂ = ?

T₂ = 0 °C + 273 = 273 K

Solving Eq. 1 for P₂,

P₂ = P₁ T₂ / T₁

Putting values,
P₂ = (1.5 atm × 273 K) ÷ 308 K

P₂ = 1.32 atm
Result:
As the temperature is decreased so the pressure also decreases from 1.5 atm to 1.32 atm. Therefore the bag will contract.

If 65.1L of N2(g) is needed to properly inflate an airbag, how many grams of NaN3(s) are needed for the reaction

Answers

The equation for this reaction is as follow,

2 NaN₂ (s) → 2 Na (s) + 3 N₂ (g)

According to equation,

67.2 L N₂ (3 moles) is produced by = 102 g (2 moles) NaN₂
So,
65.1 L N₂ will be produced by = X g of NaN₂

Solving for X,
X = (102 g × 65.1 L) ÷ 67.2

X = 98.81 g of NaN₂

Result:
98.81 g of NaN₂ is required to produce 65.1 L N₂ to inflate airbag.

Calcite (the main mineral in limestone) is made of calcium carbonate (CaCO3). Dolomite, a related mineral, is made of magnesium carbonate (MgCO3). What happens if a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite?

Answers

Answer: CO₂ will be formed, with the consequent fizzing effect.

Explanation:

1) Look at the chemical reaction that happens between magnesiumm carbonate and vinegard

MgCO₃(aq) + CH₃COOH(l) → CO₂ (g) + MgCOOH(aq) (it is not balance as it is only to show the products formed not to make calculations).

2) Then you see that CO₂ is evolving in the form of gas. That will cause the formation of bubbles (fizzing).

Dolomite is an anhydrous magnesium carbonate mineral that reacts with acetic acid (vinegar) to produce fizzing because of the carbon dioxide gas produced.

What is effervescence?

Effervescence is a fizz or release of bubbles of gases when it reacts with another substance. Carbon dioxide is released with a fizzing effect.

The reaction between dolomite and vinegar is shown as:

[tex]\rm MgCO_{3}(aq) + 2 CH_{3}COOH(l) \rightarrow CO_{2} (g) + H_{2}O + Mg(CH_{3}COO)_{2}[/tex]

From the reaction, it can be said that the release of carbon dioxide results in effervescence or fizz.

Therefore, a drop of acetic acid on dolomite results in effervescence.

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NEED ASAP
Analyze the shape of H2O.
What is the shape of the H2O molecule?
Is it symmetrical?
Does this mean that the H2O molecule is polar or nonpolar?

Answers

Answer:

The answers are in the explanation.

Explanation:

Analyze the form of H2O: The water molecule is composed of an oxygen atom, linked to two hydrogen atoms. The oxygen atom shares one pair of electrons with each hydrogen atom, leaving two pairs of free electrons in the oxygen without sharing.

What is the shape of the H2O molecule? The pairs of unshared electrons exert a repulsion, so the molecule acquires the angular shape.

Is it symmetrical? The H2O molecule is asymmetric due to free electron pairs.

Does this mean that the H2O molecule is polar or non-polar? Does this mean that the molecule is polar, as the uneven distribution of electrons gives it a slightly negative charge near the oxygen atom and a slightly positive charge near the hydrogen atoms.

Have a nice day!

The H2O molecule looks like a bent or V-shaped. This is made up of two hydrogen atoms connected to a middle oxygen atom.

The H2O molecule is not symmetrical due to the lone pairs on the central oxygen atom.

The H2O molecule is polar due to the bent shape and unequal distribution of electron density.

What is the shape of the H2O molecule?

This arrangement makes the molecule have a curved shape. The H-O-H bond is polar because the oxygen and hydrogen have different attraction strengths.

However, the bent shape of the molecule creates an overall polarity. In water (H2O), the oxygen atom has a stronger pull on the shared electrons compared to the hydrogen atoms. This makes the oxygen atom attract the electrons closer to itself. As a result, one end of the molecule has a little bit more negative charge, while the other ends have a little bit more positive charges.

Answers

Answer is C. They are liquids at room temperature.

Saturated fats are solid at room temperature, while unsaturated fats are liquid at room temperature.

how many liters of nitrogen gas are needed to make 25 mol of nitrogen trifluoride

Answers

The reaction between N₂ and F₂ gives Nitrogen trifluoride as the product. The balanced equation is;

N₂ + 3F₂ → 2NF₃

The stoichiometric ratio between N₂ and NF₃ is 1 : 2
Hence,
moles of N₂ / moles of F₂ = 1 / 2
moles of N₂ / 25 mol = 0.5
moles of N₂ = 0.5 x 25 mol = 12.5 mol

Hence N₂ moles needed = 12.5 mol

At STP (273 K and 1 atm) 1 mol of gas = 22.4 L

Hence needed N₂ volume = 22.4 L mol⁻¹ x 12.5 mol
= 280 L

If the partial pressure of carbon dioxide gas in a blood capillary is 45 mm hg, what is the pressure expressed in inches of mercury? 0.059 in. hg 1.8 in. hg 4.5 in. hg 1,100 in. hg 0.87 in. hg

Answers

both inches of mercury and milimeters of mercury are units used to measure pressure .
in. Hg - inches of mercury
mm Hg - millimetres of mercury
1 mm Hg is equivalent to 0.0394 in. Hg
therefore 45 mm Hg is equal to 0.0394 in.Hg/mm Hg x 45 mm Hg = 1.8 in. Hg

correct answer is B - 1.8 in. hg

How many unshared pairs of electrons does the nitrogen atom in ammonia possess?

Answers

In order to find the number of unshared electrons present on N atom in Ammonia (NH₃), we will first draw the lewis structure of Ammonia.

Step 1: Calculate number of Total valence Electrons:

# of Valence e⁻s in N = 5

# of Valence e⁻s in H₁ = 1

# of Valence e⁻s in H₂ = 1

# of Valence e⁻s in H₃ = 1
---------------
Total Valence e⁻s = 8

Step 2: Start drawing the structure:

Draw Central atom (N) in center surrounded by three H atoms. Connect N with each H atom through single bond and subtract e elctrons from total valence electrons for each single bon. Therefore, for three single bonds, 6 electrons are subtracted. i.e.

= 8 - 6

= 2

These two electrons left are added to N atom as a lone pair of electron.

Result:
Nitrogen atom in Ammonia possess 2 (two) unshared electrons marked as red in given picture.

The nitrogen atom in an ammonia molecule has one lone pair of electrons.

The nitrogen atom in an ammonia molecule (NH₃) has five valence electrons. According to its Lewis structure, nitrogen forms three covalent bonds with three hydrogen atoms. Each hydrogen atom donates one electron, filling its valence shell.

Nitrogen uses three of its five valence electrons in these bonds, resulting in three bonding pairs shared between nitrogen and hydrogen. The remaining two valence electrons on the nitrogen atom do not participate in bonding and are thus termed an unshared pair or a lone pair.

Therefore, the nitrogen atom in ammonia possesses one lone pair of electrons.

Complete combustion of glucose (c6h12o6). oxygen gas is the other reactant in this combustion reaction. the products are co2 and h2o

Answers

C6H12O6 +6O2 -----> 6CO2 + 6 H2O

If less than 1% of ethanoic acid is ionized in an instant, ethanoic acid is considered a __________ acid. hydrochloric weak strong sulfuric

Answers

If less than 1% of ethanoic acid is ionized in an instant, ethanoic acid is considered a weak acid.
Ethanoic (acetic) acid ionization: CH₃COOH(aq) ⇄ CH₃COO⁻(aq) + H⁺(aq).
In water ethanoic acid is mainly in CH₃COOH form, only 1% in CH₃COOH and H⁺ ions, because it gives little hydrogen ions, this acid is considered weak monoprotic acid.
In aqueous solution, acetic acid has a pKa value of 4.76.

Consider the rate below
R=K(L)^2(XY)
What is the overall order of the reactants in this reaction? 0 1 2 3

Answers

The Order of Reaction is defined as, "the sum of the exponents of the concentration terms in the rate expression of the reaction".
The rate expression given is,

Rate = k [L]² [XY]
So,
The sum of exponents is,
2 + 1 = 3

It is a third order reaction, provided it is second order with respect to concentration of L and first order with respect to concentration of XY.

Result:
It is 3rd Order Reaction.

What is defined as the absorption of oxygen and the release of carbon dioxide by cells?

Answers

Answer:

Cellular respiration

Explanation:

Oxygen is required by the cell in the Krebs cycle as the ultimate proton acceptor (creating water an end product during making out ATPs). During the conversion of pyruvate from glycolysis to Acetyl-CoA that enters the Krebs cycle, the pyruvate is decarboxylated (or oxidized) hence creating carbon IV oxide as a byproduct.

Fluid in the semicircular canals stimulates impulses to the brain to maintain balance t or f

Answers

The answer is True. Fluid in the semicircular canals stimulates impulses to the brain to maintain balance. If the semicircular canals are damaged, the balance sense will be affected.

Calculate the number of moles of naoh present in 11.2 ml of 2.50 m naoh solution

Answers

Let's review what is given in this problem.

The volume of the solution is 11.2 milliliters, which is 0.0112 liters (multiply 11.2 mL with 1 L / 1000 mL to get 0.0112).

The molar concentration is 2.5 M. This means that there are 2.5 moles of NaOH per liter in the solution.

Multiply the volume and the molar concentration to get the moles of NaOH in the solution.

[tex]\text{moles of NaOH} = 0.0112 \: \text{Liter} \times \dfrac{2.5 \: \text{moles}}{1 \: \text{Liter}}[/tex]

The "Liter" will cancel out, leaving only moles.
After using a calculator (or computing by hand), you should get the following value:

[tex]0.028 \: \text{moles}[/tex]

Since the given values were given with 3 significant figures, let's change this answer so there are 3 significant figures.

Thus, your final answer is [tex]0.0280 \: \text{moles}[/tex]

Answer:

0.028 moles

Explanation:

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The direction of the magnetic field produced by an electric current will change when the direction of the ____ changes

Answers

The answer is Current. The direction of the magnetic field produced by an electric current will change when the direction of the Current changes. The direction of the magnetic field around the wire reverses when the direction of the current in the wire reverses.

Which blood vessels have thick, muscular, and elastic walls? Veins Arterioles Capillaries Arteries

Answers

The answer is arteries

The correct answer would be Arteries

Which law tells us the number of atoms of each element must be the same on both sides of a chemical equation?

Answers

I think the law in question here is the law of conservation of mass. All chemical equations have to adhere to the law of conservation of mass, that states that matter cannot be created or destroyed; thus, there must be the same number of atoms of each element on each side (right and the left side)of the chemical equation.

How many core electrons are in a ground state atom of selenium?

Answers

Electrons in an atom can be classified as core electrons and valence electrons. Valence electrons are those electrons which are present in valence shell and participates in bond formation. While, Core electrons are all remaining electrons which are not present in valence shell, hence not take part in bonding.

Atomic number of Selenium (Se) is 34 hence it has 34 electrons with following electronic configuration;

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁴

From electronic configuration it is found that the valence shell is 4, and the number of electrons present in valence shell are 6. So,

Core Electrons = Total Electrons - Valence Electrons

Core Electrons = 34 - 6

Core Electrons = 28

Result:
There are 28 core electrons in Selenium.

Final answer:

Selenium has a total of 28 core electrons. This is because the electrons that fill the inner atomic orbitals of an atom, which totals 28 in the case of Selenium, are referred to as the core electrons.

Explanation:

The ground state atom of Selenium (Se) has an atomic number of 34. This means it has 34 electrons in total. Electrons in atoms are distributed in energy levels or shells, with each able to accommodate a certain number of electrons. The electrons in the outermost shell, known as valence electrons, are responsible for chemical reactivity, whereas those filling the inner shells are called core electrons. Selenium's electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁴. The first 28 electrons (1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰) fill the core atomic orbitals, so Selenium has 28 core electrons in its ground state.

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Which carbohydrate provides energy for cows but only dietary fiber for humans?

A-cellulose

B-starch

C-glycogen

D-sucrose

Answers

The answer would be,
A - Cellulose
Take care ^-^

starch serves energy for cows and diets withhold many starches

If the number of moles of a gas initially contained in a 2.10 l vessel is doubled, what is the final volume of the gas in liters? (assume the pressure and temperature remain constant.) none of the above 8.40 4.20 1.05 6.30

Answers

Final answer:

According to Avogadro's Law, which assumes temperature and pressure to be constant, the volume of gas is directly proportional to the number of moles of gas. So, if the number of moles is doubled from an initial volume of 2.10L, the final volume will be 4.20L.

Explanation:

The initial query asked: If the number of moles of a gas initially contained in a 2.10L vessel is doubled, what is the final volume of the gas in liters? The answer lies within Avogadro's Law which states that there is a direct relationship between the amount of gas (in moles) and its volume, assuming that temperature and pressure are held constant. Therefore, if you double the moles of gas, you should also double the volume. Hence, if we double the initial 2.10L, we will end up with a final volume of 4.20L.

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Classify these molecules as polar or nonpolar bcl3

Answers

Final answer:

Boron trichloride ([tex]BCl_3[/tex]) is a nonpolar molecule due to its symmetrical structure and equal electron-sharing among the boron and chlorine atoms.

Explanation:

The molecule [tex]BCl_3[/tex], known as boron trichloride, is classified as nonpolar. This classification is due to its symmetrical, trigonal planar molecular structure and that there are no lone pairs of electrons on boron. The electron density regions in[tex]BCl_3[/tex] are evenly distributed which gives rise to equal sharing of electrons among the boron and chlorine atoms. With the 120° angles between the B-Cl bonds, any partial charges formed along these polar bonds are cancelled out, making the molecule nonpolar in nature.

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BCl₃ is a nonpolar molecule due to its trigonal planar shape, which causes the dipole moments of the polar B-Cl bonds to cancel out.

To determine if the molecule BCl₃ is polar or nonpolar, we need to examine the molecular geometry and the distribution of charges. BCl₃, or boron trichloride, has a trigonal planar shape according to VSEPR theory. This shape means the three chlorine atoms are symmetrically arranged around the central boron atom at 120° angles.

Although each B-Cl bond is polar due to the difference in electronegativity between boron and chlorine, the symmetric arrangement leads to the dipole moments canceling each other out. As a result, BCl₃ is a nonpolar molecule because it has no net dipole moment.

In summary:

The geometry of BCl₃ is trigonal planar.Each B-Cl bond is polar.The symmetry causes the dipole moments to cancel out.

Therefore, BCl₃ is classified as a nonpolar molecule.

NEED HELP FAST, THANKS!
What is the distance between two consecutive troughs called? A. period length B. trough length C. amplitude length D. wavelength

Answers

Wavelength is the distance between two consecutive troughs.

A 34.53 ml sample of a solution of sulfuric acid, h2s04, reacts with 27.86 ml of 0.08964 m naoh solution. calculate the molarity of the sulfuric acid solution

Answers

Final answer:

The molarity of the sulfuric acid solution is calculated by first determining the moles of NaOH used in the titration, then finding the corresponding moles of H2SO4 using the 1:2 mole ratio from the balanced equation, and finally, dividing the moles of H2SO4 by its volume in liters.

Explanation:

To calculate the molarity of the sulfuric acid solution, we need to follow these steps:

Write down the balanced chemical equation for the reaction: H2SO4 (aq) + 2NaOH (aq) → Na2SO4 (aq) + 2H2O (l).

Calculate the moles of NaOH used in the titration. Since the molarity of NaOH is given as 0.08964 M and the volume used is 27.86 mL, the moles of NaOH is (0.08964 M)(0.02786 L) = 0.002496 moles.

From the balanced equation it's evident that the mole ratio of H2SO4 to NaOH is 1:2, thus the moles of H2SO4 will be half the moles of NaOH, which is 0.002496 / 2 = 0.001248 moles.

Finally, divide the moles of H2SO4 by the volume of the sulfuric acid solution in liters to get the molarity of the solution. Therefore, molarity = 0.001248 moles / 0.03453 L = 0.03612 M.

How many mililiters of .75% sugar solution must be added to 100 ml of 1.5% sugar solution to form a 1.25% sugar solution?

Answers

you have to add 50 mL of 0.75% to 100 mL of 1.5% to get 150 mL of 1.25% of sugar solution.

For each pair of gases, select the one that most likely has the highest rate of effusion. Use the periodic table if necessary.

Answers

Answer:

Hydrogen

Methane

Ammonia

Fluorine

Explanation:

Edge 2023

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