Assuming all volume measurements are made at the same temperature and pressure, what volume of hydrogen gas is needed to react completely with 4.55 L of oxygen gas to produce water vapor?

Answer:

Force of Tension = 1832.8  N

Explanation:

Any mass of object supported or pulled by a rope or cable  is subject to a force of tension. Since the mass is raised by a cable, tension is involved.

Mathematically,

Tension = mass × gravity(9.8 m/s²)

Tension can be represented as

T = (m × g) + (m × a)

Where g is the acceleration due to gravity of the object the cable is supporting and a is the acceleration on the object the cable is supporting. And m is the mass of the object.

mass = 158 kg

a = 1.8 m/s²

g = 9.8 m/s²

T = mg + ma

T = m(g + a)

T = 158(9.8 + 1.8)

T = 158 × 11.6

T = 1832.8  N

Answer:

The color of solution at the end point will be blue.

Explanation:

EBT is used as an indicator for complexometric titrations and acts as a chelating agent. It has a blue color, in its free form, when the pH is adjusted to 10.

On the addition of CaCl₂, EBT binds with Ca(II) and gives a red color, due to its EBT-Ca (II) complex. So, the color at the start of the titration is red.

When EDTA is added, it starts to form EDTA-Ca(II) complex. Near the endpoint, it starts to replace EBT bound to Ca, because it has a higher formation constant (Kf) for its EDTA-Ca(II) complex than EBT-Ca(II) complex. The EDTA-Ca(II) has no color so the solution shows the colour of free EBT, which is blue. Hence the color at the endpoint will be blue.

Explanation:

The electronegativity difference in C-C and C-H atoms is quite low. This means smaller the electron cloud. This further means larger bond length that is electron's are further from the nucleus.  hence,  higher potential energy of C-C and C-H bonds.

On the contrary, C-O and H-O have large difference in electronegativity( O is high electronegative element) . This means smaller bond length. Electron's near the nucleus. Thus, lower potential energy of bonds.

Answer:

The answer to your question is below

Explanation:

Melting point is the temperature at which solid changes into liquid.

Boiling point is the temperature at which a liquid changes into a gas.

Viscosity is a measure of the resistance of a liquid to flow.

Solubility is a property of a solid to dissolve in a liquid.

Conductivity is a measure of the ease at which an electric charge flows through a material.

Answer:

correct answer is a) primary air pollutants

Explanation:

solution

primary air pollutants material are that material which release pose health risk in the unmodified form and they emitted directly from identifiable source not react so they are primary air pollutant

and some major material released directly into the atmosphere as unmodified are given below

they all are primary air pollutants

so correct answer is is a) primary air pollutants

Answer: Photons

Explanation: These are packet of light. These subatomic particles have no electrical charge and rest mass. Photons are also considered as field particles in which they are to be carriers of electromagnetic fields.

Answer:

The base-dissociation constant, Kb,for the conjugate base of benzoic acid is :

[tex]K_{b}=1.54\times 10^{-10}}[/tex]

Explanation:

The product of acid dissociation constant and base dissociation constant is equal to the water dissociation constant.The general formula for the reaction is:

[tex]K_{w}=K_{a}K_{b}[/tex]

For the acid dissociation reaction:

[tex]HA + H_{2}O\rightleftharpoons H^{+}+A^{-}[/tex]

The conjugate base for the acid is A-

The acid is HA . and its Ka is given.

The value of Kw is fixed  at a given  temperature , which is equal to:

[tex]K_{w}=10^{-14}[/tex]

[tex]K_{a}=6.5\times 10^{-5}[/tex]

[tex]K_{b}=\frac{10^{-14}}{6.5\times 10^{-5}}[/tex]

[tex]K_{b}=1.54\times 10^{-10}}[/tex]

Answer:

Ka*kb=kw

Explanation:Got it right

Answer:

The anion value of 21mEq/L suggest the client will have metabolic acidosis

Explanation:

Anion gap is the interval or difference between measured cations (Sodium and Potassium) with the sum of measured anions (chloride and bicarbonate)

Using the above mentioned data

(166 + 5) - (115 + 35)  =  21mEq/L

Therefore the Anion gap = 21mEq/L

The question is incomplete, the complete question is

The following equation is the balanced combustion reaction for C6H6

[tex]2C_6H_6(l)+15O_2(g) \rightarrow 12CO_2(g)+6H_2O(l)+6542 kJ[/tex]

If 7.400 g of [tex]C_6H_6[/tex] is burned and the heat produced from the burning is added to 5691 g of water at 21°C. What is the final temperature of the water?

Answer:

34.45°C is the final temperature of the water.

Explanation:

Moles of benzene = [tex]\frac{7.400 g}{78 g/mol}=0.09487 mol[/tex]

According to reaction, 2 moles of benzene on combustion gives 6542 kJ of heat. Then 0.09487 moles of benzene will give:

[tex]\frac{1}{2}\times 6542 kJ\times 0.09487 mol=310.325 kJ[/tex]

Heat added to water = Q = 310.325 kJ = 310,325 J

(1 kJ = 1000 J)

Specific heat of water = C = [tex]4.18 J/g^oC[/tex]

Mass of the water = m = 5691 g

Initial temperature of the water =[tex]T_1[/tex] = 21°C

Final temperature of the water =[tex]T_2[/tex] =?

Change in temperature of the substance =ΔT =[tex]T_2-T_1[/tex]

[tex]Q=mc\times \Delta (T_2-T_1)[/tex]

[tex]310,325 J=5691 g\times 4.18 J/g^oC\times (T_2-21^oC)[/tex]

[tex]T_2=34.45^oC[/tex]

34.45°C is the final temperature of the water.

Answer:

The final temperature of the water is 34.0 °C

Explanation:

Step 1: Data given

Mass of C6H6 burned = 7.400 grams

Mass of water = 5691 grams

Temperature of water = 21 °C

Specific heat of water = 4.184 K/g°C

2C6H6+15O2→12CO2+6H20+6542KJ

Heat released with combustion of C6H6 = 6542KJ

Step 2: Calculate moles of C6H6

Moles C6H6 = mass C6H6 / molar mass C6H6

Moles C6H6 = 7.400 grams / 78.11 g/mol

Moles C6H6 = 0.09474

Step 3: Calculate heat transfered

Q = 0.09474 moles * 6542 kJ/2 mol = 309.89 kJ

Step 3: Calculate finam temperature

Q = m * c * ΔT

⇒ with Q = the heat transfered =309.9 kJ = 309890 J

⇒ with m = the mass of water =  5691 grams

⇒ with c = the specific heat of water = 4.184 J/g°C

⇒ with ΔT = The change in temperature

ΔT = Q /(m*c)

ΔT = 309890 / ( 5691 * 4.184)

ΔT =13.0 °C

Step 4: Calculate the final temperature

T2 = T1 + ΔT

T2 = 13.0 + 21.0°C

T2 = 34.0 °C

The final temperature of the water is 34.0 °C

Answer:

True

Explanation:

From the equation of reaction, one mole of chlorine gas molecule was consumed to produce two moles of sodium chloride

Answer: True

Explanation: The mole to mole ration is for 1 mole of Cl2 to produces 2 moles of NaCl. So the stoichiometric ratio is 1 is to 2.

Answer: A. It has 20 protons, 20 neutrons and 20 electrons

Explanation: The atomic number of an atom is equal to the number of protons inside the nucleus. In a neutral atom the number of electrons and protons are equal.

The number of neutrons can be determined by this formula

Atomic Mass - Atomic Number = n

40 - 20 = 20 neutrons

Protons = 20

Electrons = 20

Neutrons = 20

Answer:

the required concentration is 1.52 M

2 HCl + Na2CO3 -----> CO2 + H2O + NaCl

2 moles HCl reacts to form 1 mole of CO2 .

no. of moles of CO2 = 20.1/ 44.1 = 0.455

no. of moles of HCl = 0.455* 2 = 0.911 mole (molar ratio =2 from equation)

con. of HCl =no. of moles/volume in liter

=0.911/ 0.597 = 1.52 M

Final answer:

To find the concentration of an HCl solution from the mass of CO₂ produced in a reaction, we first calculate the moles of CO₂ and then use the molar ratio between HCl and CO₂ to find the moles of HCl. Finally, we find the concentration by dividing the moles of HCl by the volume of the solution in liters, resulting in a concentration of 0.7102 M for the HCl solution.

Explanation:

To determine the concentration of the HCl solution, we must first calculate the number of moles of CO₂ produced from the given mass. CO₂ has a molar mass of 44.01 g/mol, so the number of moles of CO₂ can be calculated as follows:

Number of moles of CO₂ = 17.1 g CO2 ÷ 44.01 g/mol = 0.3885 mol CO₂

According to the balanced chemical equation for the reaction between HCl and Na₂CO₃:

HCl(aq) + Na₂CO₃(aq) → H₂O(l) + CO₂(g) + 2NaCl(aq)

We can see there is a 1:1 molar ratio between HCl and CO₂. This means the number of moles of HCl is also 0.3885 mol. Now we can calculate the concentration of HCl in the 547 mL solution by using the number of moles and the volume in liters (0.547 L):

Concentration of HCl = Moles of HCl ÷ Volume of solution in liters

Concentration of HCl = 0.3885 mol ÷ 0.547 L = 0.7102 M

Therefore, the concentration of the HCl solution is 0.7102 M.

Answer:

1600 yr

Explanation:

The half-life of radium-226 is the time it takes for half of it to decay.  

After one half-life, half of the original amount will remain.  

After a second half-life, half of that amount will remain, and so on.  

We can construct a table as follows:  

[tex]\begin{array}{cccc}\textbf{No. of} &\textbf{Fraction} &\textbf{Mass}\\ \textbf{Half-lives} & \textbf{Remaining}&\textbf{Remaining/g}\\0 & 1 &900.0\\\\1 & \dfrac{1}{2} &450.0\\\\2 & \dfrac{1}{4} & 225.0\\\\3 & \dfrac{1}{8} & 112.5\\\\\end{array}[/tex]

We see that the mass will drop to 225.0 g after two half-lives.

The mass dropped to 225.0 g in 3200 yr.  

If 3200 yr = 2 half lives,

1 half-life = 1600 yr

The decay curve for your sample is shown below. The mass has dropped to half its original value (450 g) after 1600 yr and to one -fourth  (225.0 g) after 3200 yr.

The ΔG°rxn at 25.0 °C for the given reaction is -4.184 KJ/mol, which means the reaction is spontaneous under standard conditions. When actual concentrations are provided, the ΔGrxn at 25.0 °C is -2.81 kJ/mol, indicating that the reaction remains spontaneous.

To calculate the ΔG°rxn at 25.0 °C, we'll be utilizing the formula ΔG° = -RT ln K, where R is the gas constant (8.314 J/mol K), T is the temperature in Kelvin (25.0 °C = 298.15 K), and K is the equilibrium constant Kf (2.5 × 10³ M^-2). The R needs to be converted to kJ from J by dividing it by 1000. Following these conversions, we can substitute these values:

ΔG° = - (8.314 x 10^-3 kJ/mol K) x (298.15 K) x ln (2.5 × 10³ M^-2) = -4.184 KJ/mol

The spontaneity of the reaction is determined by the sign of ΔG. In this case, since ΔG is negative, it indicates that the reaction is indeed spontaneous under standard conditions.

For evaluating ΔGrxn at 25.0 °C when [Ag^+]=0.00850 M, [NH₃]=0.156 M, and [[Ag(NH₃)2]^+]=0.00632 M, we must resort to the equation ΔG = ΔG° + RT ln Q, where Q is the reaction quotient. We substitute the actual concentrations into the equilibrium expression to get Q = {[Ag(NH₃)2]^+} / ([Ag^+] x [NH₃]^2) = 0.00632 / (0.00850 x (0.156)^2) = 2.666. Thus, the ΔGrxn can be calculated as ΔG = -4.184 kJ/mol + 8.314 x 10^-3 kJ/mol K x 298.15K x ln(2.666) = -2.81 kJ/mol.

As ΔGrxn remains negative even with these conditions, the reaction still remains spontaneous.

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Answer:the mole ratio gives 2:3

Explanation:

From the reaction we can see that Al has 2 moles reacting with Clothes with 3 mole which gives a product of 2 moles Aluminium chloride.

Answer:

I and II

Ionization and. Dissociation

Explanation:

Dissociation,

Is to unbundle a compound into smaller, less complex constituents that are generally able to recombine under different conditions.

Ionization or ionisation,

Is the process in which an atom or a molecule accepts or loses electrons to become negatively or positively charged, it often is accompanied by with chemical changes.

Dispersion

The act of distributing things over a wide area.

The dissolving processes that change the identity of a substance in chemistry are ionization and dissociation.

The dissolving processes that change the identity of a substance are ionization and dissociation.

Ionization occurs when a substance forms ions in a solution. For example, when hydrochloric acid (HCl) dissolves in water, it ionizes into hydrogen ions (H+) and chloride ions (Cl-).

Dissociation happens when a compound breaks apart into its constituent ions in a solution. One example is table salt (NaCl) dissociating into sodium ions (Na+) and chloride ions (Cl-) when dissolved in water.

Dispersion is the process of solute particles spreading evenly throughout a solvent, without forming ions or breaking apart into ions. Dispersion does not change the identity of the substance.

Answer:

B. An ionized atom has a number of protons that is unequal to the number of electrons.

Explanation:

For a neutral atom , the number of proton and electron is equal. An ionized atom has either loss or gain electron, thereby making the number of proton and electron unequal. The answer B is true because an ionized atom has either loss or gain electron to make the number of electron and proton unequal.

Option A is incorrect because a cations holds a positive charge when it loss one or more electron not when it gains one or more electron(s). Anions possess negative charge for gaining electron(s).

Option C is not true because ions can also carry negative charges and they are called anions.

Option D is false because losing one or more electron will turn an atom to a cations.

Answer:

1.00 mole of He have [tex]6,02x10^{23}[/tex] atoms.

Explanation:

To solve this exercise it is important to know the definition of Avogadro's number

Avogadro's number is the proportional factor that relates the molar mass of a substance to the number of elementary units (atoms, molecules, particles, ions, electrons) that constitute it and its magnitude is equal to 6.022 140 857 × 10²³

One mole of helium we have [tex]6,02x10^{23}[/tex] atoms.

One mole of helium (He) contains 6.02 × 10^23 atoms, as this is Avogadro's number, which defines the number of entities per mole of a substance.

The student is asking how many atoms are in 1.00 moles of helium (He). To answer this question, we need to use Avogadro's number, which is 6.02 × 1023 atoms/mole. Since one mole of any substance contains Avogadro's number of atoms, molecules, or ions, we can easily calculate the number of atoms in one mole of helium.

Therefore, 1.00 mole of He contains 6.02 × 1023 atoms of He. This is a direct conversion using the definition of a mole.

Explanation:

Whenever we need to make a dilute solution of an acid then it is necessary to add water or non-acidic component into the acid first. This is because addition of water or non-acidic component directly into the acid could be highly exothermic in nature.

As a result, the acid can splutter and can cause burning of skin and other serious damage.

So, in order to avoid such type of damage the addition of water or non-acidic component into the acid actually helps to minimize the heat generated.

Thus, we can conclude that correct order of steps for making a more dilute solution of an acid is that either add all of the water or non-acid component first, or add a significant portion, before adding the acid to the mixture.

Answer:

Option (A)

Explanation:

Thus, all these three processes are mainly implemented in order to reduce soil erosion, which usually takes place due to agents like wind and water.

Hence, the correct answer is option (A).

Answer:

a

Explanation:

Answer:

The answer to your question is " 3 "

Explanation:

Equation = ?

Phosphoric acid = H₃PO₄

Calcium hydroxide = Ca(OH)₂

This is an acid base reaction because there is an exchange of hydrogens.

Reaction

                   H₃PO₄   +   Ca(OH)₂   ⇒   Ca₃(PO₄)₂  +   H₂O

Balance

                             Reactants      Elements      Products

                                  1                       P                    2

                                  1                      Ca                   3

                                  5                     H                     2

                                  6                     O                    9

The reaction is unbalanced

                   2H₃PO₄   +   3Ca(OH)₂   ⇒   Ca₃(PO₄)₂  +   6H₂O

Balance

                             Reactants      Elements      Products

                                  2                      P                    2

                                  3                      Ca                  3

                                 12                     H                    6

                                 14                     O                    14

Now, the reaction is balanced, the coefficient of Calcium hydroxide is 3

Answer:

4.00 moles

Explanation:

Avogadro´s number is 6.022 x 10²³ molecules, atoms, particles, etc.

Here we are talking of atoms of copper, so 1 mol of copper is equal to 6.022 x 10²³ atoms, and we only need to setup the proportion to find the number of mol in 2.41 x 10²⁴ atoms. ( Think of it like a dozen, avogadro´s is 6.022 x 10²³ )

( 1 mol copper/ 6.022 x 10²³ atoms of copper ) x  2.41 x 10²⁴ atoms

= 4.00 moles

Answer:

The assumptions  we make when we infer the mass of a galaxy cluster from observations of the spectra of its constituent galaxies is thermal hydrostatic equilibrium

Explanation:

In galaxy cluster observation, thermal X-ray emission from the hot intracluster gas measures directly the gas density and temperature distributions within the cluster. This hot gas is confined by and expected to trace the underlying three-dimensional gravitational potential. Under the assumption of thermal hydrostatic equilibrium, these gas properties may be used to infer the cluster total mass distribution.

Hence, the assumptions  we make when we infer the mass of a galaxy cluster from observations of the spectra of its constituent galaxies is thermal hydrostatic.

Answer:

35.4528731 amu

Explanation:

To appropriately get the atomic mass unit of chlorine, we can get the answer using the masses from the isotopes. This can be obtained as follows. What we do is that we multiply the percentage compositions by the masses.

Now let’s do this.

[75.77/100 * 34.969] + [24.23/100 * 36.966]

= 26.4960113 + 8.9568618 = 35.4528731

Answer: the atomic weight of chlorine is 35.5

Explanation:Please see attachment for explanation

Answer:

2 or more

Explanation:

There are 2 or more valid electron dot formulas—having the same number of electron pairs for a molecule or ion—can be written when a resonance structure occur as we know that Sharing of electrons takes place so that atoms achieve noble gas configurations. So, How is it that an electron dot arrangement reflects a covalent bond? An electron dot arrangement represents a pair of dots with the mutual electrons of a covalent bond.  A great energy of dissociation from bonds leads to a solid covalent bond.

Answer: 2 or more

Explanation:

Answer: The acetaminophen

Explanation: Liquid-Liquid is a very important and commercial separation method used for the chemical separation and analyst of chemical mixtures. It is also known as PARTITIONING. In this technique the solute is transferred from one solvent to another of which both solvents are IMMISCIBLE OR PARTLY MISCIBLE. example in the mixture involving sodium bicarbonate,acetylsalicylic acid and acetaminophen and a binder after the binder is removed and you mix the two other components with the sodium bicarbonate the solution the acetylsalicylic acid dissolved but the acetaminophen did not meaning you could separate it from the other.

Answer:

c. strontium is chemically similar to calcium and is incorporated into bone.

Explanation:

Strontium is a chemical element in group two which bears a great similarity with calcium in terms of chemical reactivity, ion size, etc. Hence it can easily replace calcium in the bone, causing a great damage to the individual because of its radioactivity.

Answer:

Empirical formula will be (NH₄)₃PO₄, which matches the molecular formula

Explanation:

This is the reaction:

NH₃ + H₃PO₄ → 28.2% N, 20.8% P, 8.1% H, 42.9% O

In 100 g of compound we have:

28.2 g N

20.8 g of P

8.1 g of H

42.9 g of O

Now we divide each  between the molar mass:

28.2 g / 14 g/mol = 2.01 mol

20.8 g / 30.97 g/mol = 0.671 mol

8.1 g / 1 g/mol = 8.1 mol

42.9 g / 16 g/mol =  2.68 mol

And we divide again between the lowest value of moles

2.01 mol / 0.671 mol → 3

0.671 mol / 0.671 mol → 1

8.1 mol / 0.671 mol → 12

2.68 mol / 0.671 mol → 4

Molecular formula will be: N₃PH₁₂O₄ → (NH₄)₃PO₄

Empirical formula will be (NH₄)₃PO₄, which matches the molecular formula

Obligate anaerobes survive without oxygen by using anaerobic respiration or fermentation as their energy-producing processes. They lack normal cellular defenses against oxidative stress, which makes oxygen lethal to them. For example, Clostridium perfringens bacteria are obligate anaerobes that cannot survive in the presence of oxygen and use molecules other than oxygen as terminal electron acceptors.

Obligate anaerobes are organisms that cannot live in an environment where there is oxygen. They survive without oxygen by using anaerobic respiration or fermentation as their energy-producing processes. These organisms lack normal cellular defenses against oxidative stress, which makes oxygen lethal to them. For example, Clostridium perfringens bacteria are obligate anaerobes that cannot survive in the presence of oxygen and use molecules other than oxygen as terminal electron acceptors.

Answer:

B. frost wedging Hope i helped!

Explanation:

Answer:

B

Explanation: