What is the concentration in millimoles/liter of a solution composed of 1.48 ml of a 0.0037 M solution to which 1.51 ml ot solvent are added

If the 13.5 mol of the Zn and 3.5 mol of S are mixed together and the heated, the mass of the ZnS will be produced is 93.97 g.

The chemical equation is as :

Zn + S -->  ZnS

The moles of the zinc, Zn the = 13.5 mol

The moles of the sulfur, S = 3.5 mol

1 mole of the Zn produces the 1 mole of the ZnS

1 mole of the S produces the 1 mole of the ZnS

The S is the limiting reactant. The production of the ZnS is depends on the the sulfur.

1 mole of the S produces the 1 mole of the ZnS

The moles of the ZnS = 3.5 mol

The mass of the ZnS = moles × molar mass

The mass of the ZnS = 3.5 × 97.47

The mass of the ZnS = 93.97 g

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Answer: 75° C for mercury, 40.59° C for iron

Explanation:

the equation used to solve this problem is q=mcΔT ( where q is heat in joules, m is mass in grams, c is the specific heat capacity, and ΔT is the change in temperature in degrees celsius)

For mercury:

q = mcΔT

1050J = (150g)(0.140J/g°C)(final T - 25°C)

\(\frac{1050}{(150)(0.140)}\) = final T - 25

Final T = \(\frac{1050}{(150)(0.140)}\) - 25

Final T = 75°C

For iron:

q = mcΔT

1050J = (150g)(0.449J/g°C)(final T - 25°C)

\(\frac{1050}{(150)(0.449)}\) = final T - 25°C

final T = \(\frac{1050}{(150)(0.449)}\) + 25

Final T = 40.59°C

Molecular equations for the following chemical reactions using shortened structures:

A. Butanoic acid + sodium:

C3H7COOH + Na → C3H7COONa + H2

B. Formic Acid + Aluminum Hydroxide:

HCOOH + Al(OH)3 → Al(HCOO)3 + 3H2O

C. Acetic Acid + Potassium Oxide:

CH3COOH + K2O → 2CH3COOK + H2O

D. Propanoic Acid + Lithium Hydroxide:

C2H5COOH + LiOH → C2H5COOLi + H2O

e. Acetic acid + butanol:

CH3COOH + C4H9OH → CH3COOC4H9 + H2O

F. Methanoic Acid + Potassium Carbonate:

HCOOH + K2CO3 → 2HCOOK + H2O + CO2

For each reaction, an informal structural formula of the organic substance and the product formed in the reaction is given.

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Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

Answer:

486 nm

Explanation:

From the question given above, the following data were obtained:

Energy (E) = 4.09×10¯¹⁹ J

Wavelength (λ) =?

Next, we shall determine the frequency of the photon. This can be obtained as follow:

Energy (E) = 4.09×10¯¹⁹ J

Planck's constant (h) = 6.63×10¯³⁴ Js

Frequency (f) =?

E = hf

4.09×10¯¹⁹ = 6.63×10¯³⁴ × f

Divide both side by 6.63×10¯³⁴

f = 4.09×10¯¹⁹ / 6.63×10¯³⁴

f = 6.17×10¹⁴ Hz

Next, we shall determine the wavelength of the photon. This can be obtained as follow:

Frequency (f) = 6.17×10¹⁴ Hz

Velocity of photon (v) = 3×10⁸ m/s

Wavelength (λ) =?

v = λf

3×10⁸ = λ × 6.17×10¹⁴

Divide both side by 6.17×10¹⁴

λ = 3×10⁸ / 6.17×10¹⁴

λ = 4.86×10¯⁷ m

Finally, we shall convert 4.86×10¯⁷ m to nm. This can be obtained as follow:

1 m = 1×10⁹ nm

Therefore,

4.86×10¯⁷ m = 4.86×10¯⁷ m × 1×10⁹ nm / 1 m

4.86×10¯⁷ m = 486 nm

Therefore, the wavelength of the photon is 486 nm

The balanced oxidation-reduction equation for the destruction of cyanate ion waste solution from gold-mining operations by treatment with hypochlorite ion in basic solution is:

OCN⁻(aq) + OCl⁻(aq) + 2OH⁻(aq) → CO₂⁻(aq) + N₂(g) + Cl⁻(aq) + H₂O(l)

In this reaction, the cyanate ion (OCN⁻) is oxidized to carbon dioxide (CO₂⁻) and nitrogen gas (N₂), while the hypochlorite ion (OCl⁻) is reduced to chloride ion (Cl⁻). The reaction takes place in basic solution, which provides the hydroxide ions (OH⁻) needed to neutralize the acidic H⁺ ions produced during the oxidation of the cyanate ion.

The reaction is exothermic, releasing heat energy as the products form. This reaction is an effective way to dispose of the cyanate ion waste generated by gold-mining operations, as it converts the hazardous waste into harmless gases and ions.

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Answer:

At a certain altitude a barometer using water (density 0.99g0cm³) as the barometric liquid gave a pressure that was recorded as 85cm H2O. if be a we density 0.879g/cm³ was used

In this question, we have to determine the [H+] of an acidic solution that has a pOH of 8.27.

In order to find this value, we need to find the value of pH before, and we have a mathematical relationship between pH and pOH:

pH + pOH = 14, this value refers to the maximum value of pH scale

pH + 8.27 = 14

pH = 14 - 8.27

pH = 5.73

Now that we have the pH value, 5.73, we can find the [H+] value with the following formula:

[H+] = 10^-pH

[H+] = 10^-5.73

[H+] = 1.86*10^-6, this is the value of H+

Answer:

Protons, Neutrons and electrons

Explanation:

Answer:

The molar concentration of the crystal violet solution is more concentrated than that of the sodium hydroxide solution. It is because the crystal violet solution has more solute in it compared to the sodium hydroxide.

The statement "All organic compounds contain the element carbon, but not all compounds containing the element 'carbon' are organic" can be justified based on the definition and characteristics of organic compounds.

Organic compounds are compounds primarily composed of carbon and hydrogen atoms, often with other elements like oxygen, nitrogen, sulfur, and phosphorus. These compounds are typically associated with living organisms and are known for their unique properties and behavior, including the ability to form complex structures, exhibit covalent bonding, and undergo organic reactions.

On the other hand, there are compounds that contain carbon but are not classified as organic. One notable example is carbon dioxide (\(CO_{2}\)), which is a simple inorganic compound composed of carbon and oxygen. Carbon dioxide does not possess the characteristic properties of organic compounds, such as the ability to form long chains or undergo organic reactions.

Additionally, there are inorganic compounds like carbonates (such as calcium carbonate) and carbides (such as calcium carbide) that contain carbon but are not considered organic. These compounds have distinct chemical and physical properties different from those of organic compounds.

In summary, while all organic compounds contain carbon, not all compounds containing carbon are organic. The classification of a compound as organic or inorganic depends on its overall molecular structure, bonding, and characteristic properties.

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Answer: A. Phosphodiester bond.

Explanation: "A phosphodiester bond occurs when exactly two of the hydroxyl groups in phosphoric acid react with hydroxyl groups on other molecules to form two ester bonds. Phosphodiester bonds are central to all life on Earth as they make up the backbone of the strands of nucleic acid."

"The nucleotides in DNA and RNA have three components: a sugar group, a nitrogenous base, and a phosphate group. Adjacent nucleotides in a nucleic acid are joined by a phosphodiester bond."

Answer:

5.01 atm

Explanation:

To answer this question, we're going to use the PV=nRT equation, where in this case:

We input the data:

And finally solve for P:

The density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.

To determine the density of ammonia gas (NH3) in a 6.0 L container at a pressure of 820 mm Hg, we need to use the ideal gas law equation, which relates pressure, volume, number of moles, and temperature for a given gas.

The ideal gas law equation is:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Since we are given the pressure (820 mm Hg), volume (6.0 L), and assuming standard temperature and pressure (STP), we can use the values for R (0.0821 L·atm/(mol·K)) and convert the pressure to atm by dividing by 760 (1 atm = 760 mm Hg).

820 mm Hg / 760 mm Hg/atm = 1.08 atm

Now we can rearrange the ideal gas law equation to solve for density (d):

d = (P * M) / (RT)

Where M is the molar mass of ammonia (NH3), which is approximately 17.03 g/mol.

Substituting the values, we have:

d = (1.08 atm * 17.03 g/mol) / (0.0821 L·atm/(mol·K) * 298 K)

Simplifying the equation, we find:

d ≈ 0.805 g/L

Therefore, the density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.

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Answer: the percent composition of Ba(OH)2 is: 80.15% Ba, 18.67% O and 1.176% H

Explanation:

The question requires us to determine the percent composition of Ba(OH)2.

The percent composition of a compound describes the amount of each element in the molecule in terms of mass percentage. We can determine the percentage composition using the molar mass of the compound and the molar masses of each element, considering the amount of atoms of these elements in the compound.

1) Determining the molar mass of the compound

The atomic masses of Ba, O and H are as it follows:

atomic mass Ba = 137.3 u

atomic mass O = 15.99 u

atomic mass H = 1.007 u

To calculate the molar mass of Ba(OH)2, we'll need to consider the amount of each element in the molecule and the atomic mass of the elements:

Therefore, the molar mass of Ba(OH)2 is 171.3 g/mol.

2) Determining the percent composition

We can determine the percent composition of each element in the compound using the following equation:

where X is a generic element.

Thus, considering the molar mass calculated and the atomic masses listed previously, we can calculate the percent composition of Ba, O and H in the molecule Ba(OH)2 as:

(note that the atomic mass, in u or amu, is numerically equal to the molar mass of the element, in g/mol).

Therefore, the percent composition of Ba(OH)2 is: 80.15% Ba, 18.67% O and 1.176% H.

0.6 is the equilibrium constant for the given reaction.

To calculate the equilibrium constant (K) for the given reaction, we need to use the molar concentrations of the reactants and products at equilibrium. The equilibrium constant expression is given by:

\(K= [H_{2}O]^{2} / ([H_{2}^{2} * [O_{2}])\)

Given the moles of H2, O2, and H2O in the 8.1 L container, we can convert them to molar concentrations by dividing the number of moles by the volume:

[H2] = 1.83 moles / 8.1 L

[O2] = 2.33 moles / 8.1 L

[H2O] = 3.95 moles / 8.1 L

Substituting these values into the equilibrium constant expression, we have:

K = \((3.95 / 8.1)^{2}\) / (\((1.83 / 8.1)^{2}\) * (2.33 / 8.1))

Evaluating this expression and rounding to one decimal place, we find the equilibrium constant to be:

K ≈ 0.6

Therefore, the equilibrium constant for the given reaction is approximately 0.6.

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Answer:

a mole is the number of molecules in 22.4 dm³ for all gases at all temperatures and pressures

Answer:

3.25*10^23  atoms

Answe

I hope this is useful! :)

Explanation:

We use the equation:

Mass = Number of moles * Molecular or atomic mass

Since the number of moles is 1 ("one mole of carbon-12 atoms") and the atomic mass of carbon-12 atoms is 12, hence the mass would be 12 grams. Note that the unit grams (g) is used here, as it is the SI unit for mass measurement.

Number of particles in 1 mole = 6.023 × 1023

Mass of 1 electron = 9.10938 × 10-28 gm

Mass of 1 mole of electrons = 6.023 × 1023 × 9.10938 × 10-28  = 5.486  × 10 -4

Mass of 1 proton = 1.67262 × 10 -24 gm

Mass of 1 mole of protons = 6.023 × 1023 × 1.67262 × 10 -24 gm = 1.007 gm

Mass of 1 neutron = 1.67493 × 10-24  gm

Mass of 1 mole of neutron = 1.67493 × 10-24 × 6.023 × 1023   = 1.008 gm

The mass of one mole of carbon -12 atoms is less than the sum of masses of the particles it contains.

One mole of substance contains 6.022×10²³atoms.Therefore mass of one mole carbon-12 can be calculated as,

                 mass=number of moles ×molar mass

                        =1×12=12 g

Mass of one mole of carbon -12 is 12 g.

Carbon -12 has 6 electrons,  6 protons and  6 neutrons.Mass of each sub atomic particle is as follows,

Mass of electron =0.0005 u

Mass of proton=1.0072 u

Mass of neutron=1.0087 u

As carbon -12 has 6 protons,electrons and neutrons each the mass of each of the subatomic particle is multiplied by 6.

Sum of masses of  particles =6×0.0005+6×1.0072+6×1.0087=12.0984 u

where in,mass of each particle is multiplied by 6 and then added.

Thus, the mass of one mole of carbon -12 is less than the sum of masses of it's particles .

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Answer:

Solid

Explanation:

Cus its solid, take a brick for example. It's hard and has no space unlike liquid or gas.

Answer:

ummm u ok?

Explanation:

Every atom shell of electrons will have its own unique set of quantum numbers. So the correct option is A.

This is due to the fact that each electron has a unique set of four quantum numbers that define its position and energy in an atom: principal quantum number (n), angular momentum quantum number (l), magnetic quantum number (mℓ), and spin quantum number (ms). These quantum numbers determine the state of the electron and its position within the atom. Each electron has a unique set of quantum numbers, making each atom shell of electrons have its own unique set of quantum numbers.

So the correct option is A.

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Answer:

9.93712g

Explanation:

You have 10mL of water at 33 degrees, so you want to look at the density of water at 33 degrees. Then you multiply that density (.993712) by 10 and the mL cancel out and you are left with 9.93712g.

Hope this helps!

The empirical formula for the given compound B₃H₆N₃ is BH₂N. Therefore, option (1) is correct.

The empirical formula can be described as the simplest ratio of the number of different atoms present in a compound. The molecular formula of the compound can be defined as the actual number of each atom present in a molecule. This formula is generally used and is also a multiple of the empirical formula of a compound.

The empirical formula provides the ratio of the number of atoms of different elements in a given compound. The percentage composition of a compound gives the empirical formula of that compound.

Given the compound is inorganic benzene which has a molecular formula is  B₃H₆N₃. We can write this molecular formula as (BH₂N)₃. Therefore the empirical formula of the given compound is BH₂N.

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Answer: 0.0625 grams left in the patients blood stream

Explanation:

half life formula: A = o(1/2)^t/d

A represents answer, o represents original amount of iodine used, t represents time iodine is used for, d represnts half life of iodine.

A = 1(1/2)^32/8

A = 0.0625 grams left in the patients blood stream

Answer:

Given molecule is CCl2F2.

What is the direction and magnitude of the net dipole of CCl2F2?

Explanation:

Dipole moment is a vector quantity.

The arrow end starts from a less electronegative atom and directs towards the more electronegative atom.

In the given molecule,

CCl2F2,

the central atom is carbon with sp3 hybridsation and there are no lone pairs on the central atom.

The molecule is tetrahedral but it is asymmetrical.

Because all the four bonded atoms are not same and there exists an electronegativity difference between F and Cl.

Hence, there exists a net dipole moment for the given molecule and the molecule is polar.

The molar mass of MgCrO4 is approximately 140.30 g/mol.

To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.

The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).

The atomic masses of the elements can be found on the periodic table:

Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.

Chromium (Cr) has an atomic mass of around 51.99 g/mol.

Oxygen (O) has an atomic mass of about 16.00 g/mol.

Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:

Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)

Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)

Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol

Molar mass ≈ 140.30 g/mol

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the IUPAC name of  4 tert butyl 3 chlorophenol will be given as

3-chloro-4-(1,1-dimethylethyl)phenol.

And the structure for the compound can be given as shown in figure.

IUPAC (International Union of Pure and Applied Chemistry), serves the international scientific endeavor in the dual function of a fundamental science and mission-oriented Union.

Naming according to IUPAC is based on naming a molecule's longest chain of carbons connected via single bonds forming alkane, whether in a continuous chain or in a ring.

All other deviations, either multiple bonds or atoms other than carbon and hydrogen, are indicated by prefixes or suffixes according to a specific set of priorities.

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Answer:

Oxygen is oxidized and hydrogen is reduced.

Explanation:

Let's consider the redox reaction during the electrolysis of water in an electrolytic cell.

2 H₂O ⇒ 2 H₂ + O₂

The corresponding half-reactions are:

2 e⁻ + 2 H₂O ⇒ H₂ + 2 OH⁻

2 H₂O ⇒ O₂ + 4 H⁺ + 4 e⁻

Oxygen is oxidized since its oxidation number increases from -2 to 0.

Hydrogen is reduced since its oxidation number decreases from +1 to 0.