What is the pH of a solution with an H+ ion concentration of 2.5e-4?

The order of boiling point from the highest to the lowest from the given compounds above are as follows:

CH3CH2CH2CH2CH2OH - CH3CH2CH2CH2CH2Br - CH3CH2CH2CH2CH3 - CH3CH2CH3.

The correct order is option b, d, c and a.

The boiling point of substances can simply be defined as that temperature at which liquids boils and then change to vapor or steam.

However, from the above given task, the organic compound, CH3CH2CH2CH2CH2OH has the same boiling simply because of its power to participate in hydrogen bond formation. This compound CH3CH2CH2CH2CH2OH is known as 1-pentanol.

So therefore, we can confirm that the compound from above the correct order of boiling point from the highest to the lowest is 1-pentanol, 1-bromopentane, pentane and propane respectively.

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The amide group  is the name  given to the –NR2 group.

Amides are organic molecules with the amide functional group.

Amides can be primary, secondary, or tertiary. We call secondary and tertiary amides N-substituted amides.

Amides are named using the suffix -amide. Amides are formed in the reaction between an acyl chloride and either ammonia or a primary amine.

Amides react with aqueous acid to form a carboxylic acid and ammonium salt, and with aqueous alkali to form a carboxylate salt and ammonia.

Thus ,the amide group  is the name  given to the –NR2 group.

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

A___________________

Answer:

The correct option is (3).

Explanation:

The ideal gas equation is given by :

\(PV=nRT\\\\V=\dfrac{nRT}{P}\)

The pressure of ideal gas is directly proportional to temperature and inversely proportional to its volume.

We can say that the volume of a 1.00-mole sample of an ideal gas will decrease when the pressure increases and the temperature decreases.

The volume of the idea gas decrease when pressure increases and the temperature decreases. Thus option C is correct.

The ideal gas equation can be given as:

PV = nRT

The equation in terms of pressure and temperature when n=1 can be written as:

Volume = \(\rm \dfrac{RT}{P}\)

Accordingly, the volume has been directly proportional to the temperature and has been inversely proportional to the pressure.

Thus, with the decrease in volume, there has been an increase in pressure and a decrease in temperature.

Thus, option C is correct.

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Answer:

hello

Explanation:

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Answer:

C.) No. of electrons

Explanation:

A.) is incorrect. The atomic number represents the number of protons in an element. Nitrogen (N) and sodium (Na) always have a differing amount of protons.

B.) is incorrect. The mass number represents the number of protons and neutrons in an element. The number of neutrons and protons are specific to each element (disregarding isotopes). When elements ionize, these amounts are not altered.

C.) is correct. When an element becomes an ion, the number of electrons change. When nitrogen gains 3 electrons and sodium loses 1 electron, they end up having the same number of electrons (10).

D.) is incorrect. When elements ionize, the number of neutrons does not change. The only way two different elements could have the same number of neutrons is if at least one of the elements is an isotope. Isotopes are two or more atoms of the same element that differ in their amounts of neutrons.

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\(a. \: Ca + Cl _{2} → CaCl _{2} \\

\\ b. \: Cl _{2}+H _{2} O+ NaOH → \\ NaCl+ H _{2}O \\ \\

c. \: \: \: H _{2} SO _{4} +CaCO _{3} → \\ CaSO _{4} +H _{2}O+CO _{2} \\ \\

d. \: \: Fe+Cu(NO _{3}) _{2} → \\ Fe(NO _{3} ) _{2}+Cu\)

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Answer:

zinc forms more than one ion

Answer:

Explanation:

All atoms (except for group 0 elements) of elements tend to achieve stability by having there outermost shell completely filled; achieving an octet configuration. During chemical bonding, atoms tend to achieve stability majorly in one of the two ways below

1) Ionic or electrovalent bonding: This involves the transfer of electrons from a positively charged ion (cation) to a negatively charged ion (anion). Here, no molecule is formed. For instance, in the formation of a sodium chloride (NaCl) salt. Sodium ion donates the single electron on it's outermost shell (to achieve it's octet configuration) to chloride ion (which needs just one more electron in it's outermost shell to achieve it's octet configuration).

Na⁺ + Cl⁻ ⇒ NaCl

2) Covalent bond: This involves the sharing of lone pair of electrons between two atoms to form a molecule. For example, the outermost shell of an oxygen atom, has two single electrons (that are not in pair), these single electrons can form covalent bond independently with hydrogen atoms (to form water) that also have just one electron in their shells. Hence, at every "covalent bonding site", an electron from oxygen and an electron of hydrogen is shared between the two atoms in order to achieve a stable configuration (Here, we have two "covalent bonding sites").

Answer:

The metal atoms become positive ions and the non-metal atoms become negative ions. There is a strong electrostatic force of attraction between these oppositely charged ions – this is called an ionic bond.

Explanation:

Answer:

Kd = [Ag⁺] × [NH₃]² / [Ag(NH₃)₂⁺]

Explanation:

Let's consider the dissociation reaction of the complex ion Ag(NH₃)₂⁺.

Ag(NH₃)₂⁺(aq) ⇄ Ag⁺(aq) + 2 NH₃(aq)

The dissociation constant, Kd, is the equilibrium constant for the dissociation of the complex ion, that is, it is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.

The dissociation constant for this reaction is:

Kd = [Ag⁺] × [NH₃]² / [Ag(NH₃)₂⁺]

Answer:

k

Explanation:

kidfkvyg bt tgk mg RH g fu f

Answer:

false no oxygen atoms in skeleton system

Answer: 17.2 moles of Fe in 8.60 moles of Fe2O3

Explanation: One mole of Fe2O3 contains 2 moles of Fe atoms.

So, the number of moles of Fe in 8.60 moles of Fe2O3 can be calculated as:

Number of moles of Fe = 2 × number of moles of Fe2O3

Number of moles of Fe = 2 × 8.60 = 17.2 moles

Therefore, there are 17.2 moles of Fe in 8.60 moles of Fe2O3.

Answer:

12.44 g

Explanation:

2C4H10 + 13O2 = 8CO2 + 10H2O

n(C4H10) = m(C4H10)/M(C4H10) = 4.1 / 58g/mol = 0.0707 mol (excess).

n(O2) = m(O2)/M(O2) = 25.9 / 32g/mol = 0.809 mol (deficiency).

Since the ratio of O2 to octane is 13 : 2 we can divide 0.0707 by 2 to get 0.03535 and divide 0.809 by 13 to get 0.062.

mass of CO2 produced =

M = [0.0707 moles C4H10 x 8 moles CO2] / 2 moles C4H10 x 44 g CO2/mol

M = 0.5656/2 * 44

M = 0.2828 * 44

M = 12.44 of CO2

Answer:

A

Explanation:

It will be at rest until an external force acts on it. The person flicked the card so that is the force right there and then gravity pulled the coin down in the cup.

According to Newton's law of motion, the falling of coin into  cup is best explained by statement A which is  coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.

Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.

Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.

Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic  mechanics is based on modern kinematics.

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Answer:

144 g of H₂O.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

CH₄ + 2O₂ —> CO₂ + 2H₂O

Next, we shall determine the mass of CH₄ that reacted and the mass of H₂O produced from the balanced equation. This can be obtained as follow:

Molar mass of CH₄ = 12 + (4×1)

= 12 + 4 = 16 g/mol

Mass of CH₄ from the balanced equation = 1 × 16 = 16 g

Molar mass of H₂O = (2×1) + 16

= 2 + 16 = 18 g/mol

Mass of H₂O from the balanced equation = 2 × 18 = 36 g

SUMMARY:

From the balanced equation above,

16 g of CH₄ reacted to produce 36 g of H₂O.

Finally, we shall determine the mass of H₂O produced by the reaction of 64 g of CH₄. This can be obtained as follow:

From the balanced equation above,

16 g of CH₄ reacted to produce 36 g of H₂O.

Therefore, 64 g of CH₄ will react to produce = (64 × 36)/16 = 144 g of H₂O.

Thus, 144 g of H₂O were obtained from the reaction.

Answer: Under what condition an object having density greater than water will float on water?

If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float. Density is a characteristic property of a substance and doesn't depend on the amount of substance.

Answer:

8

Explanation:

Answer:

ΔG = -24.7kJ/mol

Explanation:

ΔG° of

Pb2+(aq) + 2Br-(aq) ⇄ PbBr2(s)

is:

ΔG° PbBr2 - (2*ΔG°Br- + ΔG°Pb2+)

-261.9kJ/mol - (2*-104.0kJ/mol + -24.4kJ/mol) =  

-29.5kJ/mol

ΔG of the reaction is:

ΔG = ΔG° + RT lnQ

Where R is gas constant (8.314x10⁻³kJ/molK)

T is absolute temperature (20°C + 273.15 = 293.15K)

Q is reaction quotient = 1 / [Pb²⁺][Br⁻]²

Replacing:

ΔG = -29.5kJ/mol + 8.314x10⁻³kJ/molK*293.15K ln(1 / [Pb²⁺][Br⁻]²)

ΔG = -29.5kJ/mol + 8.314x10⁻³kJ/molK*293.15K ln(1 / [0.247M][0.758M]²)

Answer:

D) Repeating units.

Explanation:

Polymers are large macromolecules which are made up of many repeating structural units called monomers :)

Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

The definition of a saturated solution is a solution that contains all the solute that is capable of being dissolved. Then the answer is.

1. SATURATED

People can categorize the various types of interactions that take place in the environment thanks to organizational levels.

Organizational level is defined as organelles, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystems, and biosphere are the biological stages of structure of living things, listed from the simplest to the most complex. The set of cells that make up the tissue level of organization cooperate to carry out one or more particular functions.

To make sure that every cell receives what it needs to carry out life tasks, large, complex organisms need multiple levels of structure. The cell is where the body's system organization starts. Organ systems are created when organs work together to build tissues, tissues to create organs, and organs to create organs.

Thus, people can categorize the various types of interactions that take place in the environment thanks to organizational levels.

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Explanation:

₇N = 1s² 2s² 2p³

Therefore,

Option C is correct ✔

1. The reaction mixture with the largest amount of product(s) when at equilibrium is the one with the largest Keq value.

2. The reaction mixture with the largest amount of reactants when at equilibrium is the one with the smallest Keq value

3. The reactions in the table that have concentrations that represent the systems at equilibrium are Reactions 1 and 3.

4. For each reaction that is not at equilibrium, change the concentration of only one of the reactants or products so that the ratio represents the system at equilibrium.

1. In this case, the reaction mixture with the largest Keq value is Reaction 2. This is because the equilibrium constant, Keq, is a measure of the relative concentrations of the products and reactants at equilibrium. A large Keq value indicates that the equilibrium lies far to the right, meaning that there are more products than reactants at equilibrium.

2. The reaction mixture with the largest amount of reactants when at equilibrium is the one with the smallest Keq value. In this case, the reaction mixture with the smallest Keq value is Reaction 4. This is because a small Keq value indicates that the equilibrium lies far to the left, meaning that there are more reactants than products at equilibrium.

3. The reactions in the table that have concentrations that represent the systems at equilibrium are Reactions 1 and 3. This is because the concentrations of the products and reactants in these reactions are equal, which is the definition of equilibrium.

4. For each reaction that is not at equilibrium, change the concentration of only one of the reactants or products so that the ratio represents the system at equilibrium. For example, to bring Reaction 2 to equilibrium, we could increase the concentration of H2O or decrease the concentration of CO2.

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Reaction Keq Concentrations at Equilibrium

1 1000 H2O:CO2 = 1:1

2 10 H2O:CO2 = 10:1

3 0.01 H2O:CO2 = 100:1

4 0.001 H2O:CO2 = 1000:1

On the basis of the Keq values given in the table, which reaction mixture contains the largest amount of product(s) when at equilibrium? Explain.

2. Which reaction mixture contains the largest amount of reactants when at equilibrium?

3. Which reactions in the table have concentrations that represent the systems at equilibrium?

4. For each reaction that is not at equilibrium, change the concentration of only one of the reactants or

products so that the ratio represents the system at equilibrium

Answer:

The order of elements by volume-fraction (which is approximately molecular mole-fraction) in the atmosphere is nitrogen (78.1%), oxygen (20.9%), argon (0.96%), followed by (in uncertain order) carbon and hydrogen because water vapor and carbon dioxide, which represent most of these two elements in the air, are variable.

I copied and pasted but I hope this information is helpful :)

Answer:

double replacement

Explanation:

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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