a. Draw the Fischer projection (standard orientation) for L-Glucose and D-Glucose.b. What is the isomeric relationships for the two structures you drew?c. What do the D and L designations mean?d. Label each chirality center on the structures you drew either R or S. e. What can you say about the orientation of the OH group at each chirality center in a Fischer projection for a sugar in standard orientation (highest oxidizedgroup on top) and the R and S designation?

Answer:

the third one

Explanation:

When you breathe in, you inhale oxygen and exhale carbon dioxide

There are four electron groups around the central carbon atom in a molecule of methane (CH4). These groups are made up of a single carbon atom bonded to four hydrogen atoms. The four electron groups are arranged in a tetrahedral shape around the carbon atom.

The molecule of methane is tetrahedral because it consists of four carbon atoms bonded to each other in a tetrahedral shape. The tetrahedral shape is the most stable shape for a molecule of methane because it minimizes the amount of strain on the bonds between the carbon atoms. The four carbon atoms in methane are arranged in a symmetrical fashion, which allows the molecule to rotate freely about the central carbon atom. This freedom of rotation allows the molecule to adopt different shapes, which is why methane is a gas at room temperature.

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Answer: Plate movement is thought to be driven by a combination of the motion of the seafloor away from spreading ridges due to variations in topography and density changes in the crust.

Hope this helps

The process is this balanced equation is I₂ + I⁻ = I⁻₃. Molecules of elemental iodine are consist of two atoms of iodine.

Iodine is highly stable halogen. The chemical element iodine have an atomic number 53. The symbol of iodine is "I". It is present in halogen group.

An iodine atom formed by gaining an electron due to its high electron affinity. When it accepts an electron it will become iodide ion (I⁻).

Thus, The process is this balanced equation is I₂ + I⁻ = I⁻₃. Molecules of elemental iodine are consist of two atoms of iodine.

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Answer:

its located on the east of Florida

Explanation:

loo at the map, and youll see it

Answer: There are many possibilities for atomic orbits.

Explanation: In chemistry orbits, or orbitals, are the areas that electrons move around the nucleus of an atom. Think like the solar system.

There are three levels of orbitals (p,d, and f).

That should get you started. Use p, d and d described in your book to find out how many orbitals an atom has.

Moles of chromium (lll) oxide produced : 4 moles

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

4Cr+3O₂⇒2Cr₂O₃

moles of Cr=8 moles

From the equation, mol ratio Cr : Cr₂O₃ = 4 : 2, so mol Cr₂O₃ :

\(\tt \dfrac{2}{4}\times 8=4~moles\)

The freezing point of the solution is -11.8 °C.

The boiling point of the solution is 103.31 °C.

To determine the freezing point of the solution, we can use the equation:

ΔTf = Kf * m

where:

ΔTf is the freezing point depression,

Kf is the cryoscopic constant (for water, Kf = 1.86 °C/m),

m is the molality of the solution (moles of solute per kilogram of solvent).

First, let's calculate the molality (m) of the solution:

Molar mass of ethylene glycol (C2H6O2):

C = 12.01 g/mol

H = 1.01 g/mol (x 6) = 6.06 g/mol

O = 16.00 g/mol (x 2) = 32.00 g/mol

Total molar mass = 12.01 g/mol + 6.06 g/mol + 32.00 g/mol = 50.07 g/mol

Number of moles of ethylene glycol (C2H6O2) = mass / molar mass

Number of moles = 30.8 g / 50.07 g/mol = 0.615 mol

Mass of water = volume x density = 96.6 mL x 1.00 g/mL = 96.6 g

Now, let's calculate the molality:

Molality (m) = moles of solute / mass of solvent (in kg)

Molality = 0.615 mol / 0.0966 kg = 6.36 mol/kg

Now we can calculate the freezing point depression (ΔTf):

ΔTf = Kf * m

ΔTf = 1.86 °C/m * 6.36 mol/kg = 11.8 °C

To find the freezing point of the solution, subtract the freezing point depression from the freezing point of pure water (0 °C):

Freezing point = 0 °C - 11.8 °C = -11.8 °C

To determine the boiling point of the solution, we can use the equation:

ΔTb = Kb * m

where:

ΔTb is the boiling point elevation,

Kb is the ebullioscopic constant (for water, Kb = 0.52 °C/m),

m is the molality of the solution (same value as calculated before: 6.36 mol/kg).

ΔTb = 0.52 °C/m * 6.36 mol/kg = 3.31 °C

To find the boiling point of the solution, add the boiling point elevation to the boiling point of pure water (100 °C):

Boiling point = 100 °C + 3.31 °C = 103.31 °C

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The best description for the crystals formed when oxygen freezes at very low temperatures is (e) molecular crystals.

This is because oxygen is a diatomic molecule, meaning it consists of two atoms that are held together by a covalent bond. When oxygen freezes, the molecules arrange themselves in a repeating pattern that forms a solid structure. This structure is held together by intermolecular forces, such as van der Waals forces, rather than by chemical bonds, which is why it is classified as a molecular crystal. Ionic, covalent network, metallic, and amorphous crystals have different types of bonding and structures, which do not apply to the formation of oxygen crystals.
The best description for crystals formed by oxygen (O2) when it freezes at very low temperatures is (e) molecular crystals. Molecular crystals are composed of molecules held together by weak intermolecular forces, such as van der Waals forces or hydrogen bonds. In the case of oxygen, the O2 molecules are covalently bonded within the molecule, but the interactions between the molecules in the crystal are not covalent, making molecular crystals the appropriate classification.

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The product or material stream in a distillation column that boils at the lowest temperature and comes off the top of the column is known as the overhead product.

In a distillation column, the separation of different components in a mixture is achieved by exploiting differences in their boiling points. The column is designed to have a temperature gradient, with higher temperatures at the bottom and lower temperatures at the top. As the mixture is heated, the components with lower boiling points vaporize first and rise up the column.

The overhead product refers to the stream of vaporized components that reach the top of the column and are collected from there. These components have the lowest boiling points among the mixture and are therefore separated and removed as the overhead product.

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The following conversions from moles to liters and vice versa are:

5 moles H₂O x (22.4 L H₂O/1 mole H₂O) = 112 L H₂O

10 mole O₂ x (22.4 L O₂/1 mole O₂) = 224 L O₂

500 L H₂ x (1 mole H₂/22.4 L H₂) = 22.3 moles H₂

85 L Br₂ x (1 mole Br₂/44.6 L Br₂) = 1.91 moles Br₂

100 L He x (1 mole He/22.4 L He) = 4.46 moles He

8 moles Cl₂ x (22.4 L Cl₂/1 mole Cl₂) = 179.2 L Cl₂

22.4 L x (1 mole/22.4 L) = 1 mole

1000 L Ne x (1 mole Ne/22.4 L Ne) = 44.6 moles Ne

11 moles Cl₂ x (22.4 L Cl₂/1 mole Cl₂) = 246.4 L Cl₂

The number of moles of gas in a given volume can be calculated using the ideal gas law: PV = nRT, where P = pressure, V = volume, n = number of moles, R = ideal gas constant, and T = temperature in Kelvin.

Assuming standard temperature and pressure (STP), which is 0°C (273.15 K) and 1 atm, respectively, the calculation would be:

PV = nRT

(1 atm) (55.5 L) = n (0.0821 L•atm/mol•K) (273.15 K)

n = (1 atm) (55.5 L) / (0.0821 L•atm/mol•K) (273.15 K)

n = 2.12 mol

Therefore, the balloon contains approximately 2.12 moles of gas.

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Answer:

See explanation

Explanation:

For a chemical system in a state of dynamic equilibrium, the rate of forward reaction is equal to the rate of reverse reaction.

For this system under consideration;

I2(s)⇄I2(g)

When we heat the container, solid iodine is converted into purple coloured iodine vapour.

When equilibrium is achieved in the system, there will be no net change in the amount of solid iodine and iodine vapour present in the system since the rate of forward and reverse reactions are equal for a system in a state of equilibrium.

Answer:

c2h2 is it..........

Explanation:

lol

Reactions according to Bronsted are those in which there is an exchange of H+ ions. The Bronsted acid will be the substance that donates H+ ions and the base will be the compound that receives them.

As a result we will have a conjugated acid and a conjugated base. The conjugate acid will be the former base that just received the H+ ions. The conjugate base will be the former acid that donated its H+ ions.

Now let's look at the reaction. On the reactants side the compound that can donate H+ ions will be HSO3- and the compound CN- will be the one that receives them. Therefore, HSO3 will be the Bronsted acid (A) and CN will be the base (B).

HSO3 ---> A

CN -----> B

Now let's look at the product side. The compound that received the H+ ions will be the compound HCN, so this will be the conjugate acid (Ac). And the compound that lost its H+ ions is SO3, so it will be the conjugate base (Bc).

HCN --->Ac

SO3 ---->Bc

Comparing the analysis that we did with the reaction we will have that:

So, the answer will be option number 5

Answer:

Both ethylene and acetylene are hydrocarbons but the former has a carbon to carbon double bond while the latter has a carbon to carbon triple bond.

Both organic compounds are referred to as hydrocarbons.

They are also both unsaturated.

Ethylene contains a C-C double bond and belongs to the alkene group.

Acetylene contains a C-C triple bond and belongs to the alkyne group.

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Answer:

3

Explanation:

beacuses im right

Explanation:

in the given chemical equation

C2H4 + O2 → CO2 + H2O

The reactants of this reaction IS

C2H4 and O2

1) You know the number of moles, you can easily work out the molar mass of Ti(SO3)2 (titanium sulfite), but you don't know the actual mass

2) By adding the mass of the atoms that make up titanium sulfite, you should get something like 207.9934 g/mol

3) To find the actual mass, you times the molar mass and the moles together

Final Answer = 193g

Answer:

water should be the answer because its one of the 4 elements and air

Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. Therefore,  the other ions that are not attracted to the electrodes form salt.

Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.

Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state.

Positive ions are attracted towards negative electrode and negative ions are attracted toward positive electrodes. the ions which are not attracted to either of the electrode, these form salt with the other ion remaining in the electrolyte.

Therefore,  the other ions that are not attracted to the electrodes form salt.

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The electron is in the first energy level (n = 1) closest to the nucleus. The electron configuration of the anion hydrogen atom is 1s² 2s² 2p⁶, similar to the electron configuration of helium. The exact average atomic mass of hydrogen is 1.000232 g/mol. Two largest wavelengths of the Lyman series are 0 and 4RH/36.  Energy required to ionize a ground state hydrogen atom from n(i) = 1 to n(f) = ∞ is RH.

2.2: The Bohr model of hydrogen consists of a nucleus at the center (proton) and an electron orbiting the nucleus in a circular orbit. The electron is in the first energy level (n = 1) closest to the nucleus. The figure is given below.

2.3: The electron configuration of an anion hydrogen atom, which is a Lewis base, means that it has gained an extra electron. The electron configuration of the anion hydrogen atom is 1s² 2s² 2p⁶, similar to the electron configuration of helium.

2.4: To calculate the average atomic mass of hydrogen:

Average Atomic Mass = (Mass of Isotope 1 × Abundance of Isotope 1) + (Mass of Isotope 2 × Abundance of Isotope 2) + (Mass of Isotope 3 × Abundance of Isotope 3)

Given the data:

1H occurrence: 99.98%

2H occurrence: 0.0156%

3H occurrence: 0.0044%

Substituting the values into the formula:

Average Atomic Mass = (1 g/mol × 0.9998) + (2 g/mol × 0.000156) + (3 g/mol × 0.000044)

Calculating the result:

Average Atomic Mass = 0.9998 g/mol + 0.000312 g/mol + 0.000132 g/mol

Average Atomic Mass = 1.000232 g/mol

Therefore, the exact average atomic mass of hydrogen is 1.000232 g/mol.

2.6: Using Balmer's equation, let's calculate the two largest wavelengths of the Lyman series.

For n = 2:

1/λ = RH[(1/4) - (1/n²)]

1/λ = RH[(1/4) - (1/2²)]

1/λ = RH[(1/4) - 1/4]

1/λ = 0

For n = 3:

1/λ = RH[(1/4) - (1/n²)]

1/λ = RH[(1/4) - (1/3²)]

1/λ = RH[(1/4) - 1/9]

1/λ = 8RH/36 - 4RH/36

1/λ = 4RH/36

Therefore, the two largest wavelengths of the Lyman series are 0 and 4RH/36.

2.7: Let's calculate the energy required to ionize a ground state hydrogen atom from n(i) = 1 to n(f) = ∞.

E = RH[(1/ni²) - (1/nf²)]

E = RH[(1/1²) - (1/∞²)]

E = RH[1 - 0]

E = RH

Therefore, the exact energy required to ionize a ground state hydrogen atom from n(i) = 1 to n(f) = ∞ is RH.

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Answer:

183.84 u

Explanation:

W (also known as "Tungsten") atomic number is 74 and atomic mass is   183.84 u

The energy is 150 kJ

The latent heat of fusion is the amount of energy required to change the state of a substance from a solid to a liquid, or vice versa, without changing its temperature. Specifically, it is the amount of heat energy that must be added to a substance to overcome the attractive forces between its molecules and break them free from their fixed positions in the solid lattice structure.

We know that;

H = mL

m = mass of the ice

L = latent heat of fusion in J/mol

Thus;

H = 25 mol * 5.99 KJ/ mol

H = 150 kJ

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2.70 grammes of N₂ must dissolve in 30.5 litres of water at 25 degrees Celsius and 4.46 atm of pressure.

The solubility of N₂ in water depends on the temperature and pressure. To determine the volume of water needed to dissolve 2.70 grams of N₂ at 25 °C and 4.46 atm, we need to use the Henry's law equation, which relates the solubility of a gas in a liquid to its partial pressure:

C = kH x P

where C is the concentration of the gas in the liquid, kH is the Henry's law constant for the gas, and P is the partial pressure of the gas above the liquid.

The Henry's law constant for N₂ in water at 25 °C is 7.07 x 10⁻⁴ M/atm.

First, we need to convert the mass of N₂ to moles using its molar mass:

moles of N₂ = 2.70 g / 28.02 g/mol = 0.0963 moles

Next, we can use Henry's law equation to find the concentration of N₂ in water:

C = kH x P = (7.07 x 10⁻⁴ M/atm) x (4.46 atm) = 3.16 x 10⁻³ M

Finally, we can use the definition of concentration (C = moles of solute / volume of solvent) to solve for the volume of water needed:

Volume of water = moles of solute / concentration = 0.0963 moles / 3.16 x 10⁻³ M = 30.5 L

Therefore, 30.5 liters of water are needed to dissolve 2.70 grams of N₂ at 25 °C under a pressure of 4.46 atm.

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Amount (mol) of solute in 145.6 L of 0.850 M sodium cyanide

Molar concentration (also known as molarity, quantity concentration, or substance concentration) is a measure of the concentration of a chemical species in a solution, specifically of a solute, in terms of amount of substance per unit volume of solution. The most often used unit for molarity in chemistry is the number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units. A solution with a concentration of 1 mol/L is referred to as 1 molar, or 1 M.

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To balance 10.0 mL of substance a, we would need 6.67 g of substance b.

To determine how much mass of substance b would be needed to balance 10.0mL of substance a on the other pan, we need to know the density of both substances.

If we know the density of substance a and the volume of substance b, we can calculate the mass of substance b needed to balance the system.

For example, if we assume that substance a has a density of 1.0 g/mL, and we want to balance it with substance b which has a density of 1.5 g/mL, we can use the following formula:

mass of substance b = (density of substance a) x (volume of substance a) / (density of substance b)

Substituting the values given, we get:

mass of substance b = (1.0 g/mL) x (10.0 mL) / (1.5 g/mL)

mass of substance b = 6.67 g

Therefore, to balance 10.0 mL of substance a, we would need 6.67 g of substance b.

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