Which of the following sets of quantum numbers is not allowed?
A.) n=3, l=2, ml=-2
B.) n=4, l=3, ml=-3
C.) n=2, l=1, ml=-1
D.) n=2.5, l=0, ml=0
E.) n=3, l=2, ml=-1

Answer:

Figure 2 represents a nonpolar molecule containing polar covalent bonds

Explanation:

The CO2 molecule is linear, formed by 3 atoms and the electronegativity variations are equal, so its dipolar moment will be null, and this molecule will be nonpolar, however, it has polar covalent bonds.

Answer:

Sorry but i don't undertsnad the question.

Explanation:

Answer:

A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape, color, texture, flexibility, density, and mass.

A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.

Do u want examples ?

To determine the stage of the maggot larva, Caleb can observe the size, shape, and color of the larvae, as well as any distinctive physical features such as bristles or spines.

Maggots go through three instars or stages of growth, and each instar is characterized by specific physical changes. For example, in the first instar, the maggot is typically small and has a distinctive head shape. In the second instar, the maggot grows in size and may have spines or other physical features.

Finally, in the third instar, the maggot reaches its maximum size and may have a different color or shape than earlier stages. By observing the physical characteristics of the maggots, Caleb can determine the stage of development and use this information to estimate the time of death of the victim.

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The given chemical equation, 2N₂ + 3H₂ <==>2NH3, is an example of a reversible reaction.option A.

The double arrows between the reactants and products indicate that the reaction can proceed in both directions, forming both products and reactants.The reversible reaction, also known as a chemical equilibrium reaction, refers to a chemical reaction that can occur in both forward and reverse directions. It occurs when reactants are converted into products, and the products are also converted back into the original reactants.A reversible reaction can be identified by the symbol “<==>” or “⇌” that appears between the reactants and products in the chemical equation. It denotes that the reaction is in a state of chemical equilibrium. When the reactants and products have achieved equilibrium, the rate of the forward and reverse reactions is equal, and there is no further net change in the amounts of the reactants and products.A combustion reaction is a type of exothermic reaction in which a substance reacts with an oxidizing agent to produce heat and light. A one-way reaction is a type of reaction that occurs in only one direction and cannot be reversed without significant changes to the reaction conditions, such as changing the temperature or pressure.A reversible reaction, unlike a one-way reaction, can occur in both directions and reach equilibrium when the forward and reverse reaction rates are equal.option A.

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To prepare a 0.12 M solution of FeCl₃, the amount of solid FeCl₃ to be dissolved in a given volume of solvent will be 9.72 grams.

Given,

Molarity of FeCl₃ (M)= 0.12 M

The molecular weight (m) of FeCl₃ is  = 162 gm

The volume of the solution (V) to be prepared is =500 ml

The amount of FeCl₃ to be dissolved to make a 0.12 M solution is= x

So,

MV= x ÷ m × 1000

0.12× 500 = x ÷ 162 × 1000

x = 60 × 162 ÷ 1000

x= 9.72 gm

So 9.72 grams of FeCl₃ is dissolved to make 500 ml of 0.12 M solution.

For preparing 0.4 M HCl from 4M HCL:

If we need to make 500 ml of solution with 0.4M of HCL, then we use the formula:

M₁V₁= M₂V₂

0.4 × 500= 4 × x

x= 50 ml

So 50 ml of 4M HCL is taken to make 0.4 M HCL.

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Answer:

Covalent bond is a chemical bond is a strong attraction between two or more atoms.

Answer:

Ionic

Explanation:

An ionic chemical bond is a strong attraction between two or more atoms. Two atoms are more strongly attracted by ionic bonds.

Answer: el texto no es tan claro

Answer:

29.9g please refer to the picture for work

Answer:

The first image = double replacement

Second = single replacement

Third = Decomposition

Fourth = Combination

Explanation:

1. a color from each pair is being swapped and replacing each other so there is a double replacement

2. only the blue and the red are changing places so it is single replacement

3. the pair is being separated (decomposed)

4. the red and green are coming together (combined)

Answer:

rise your words, not your voice rain grows flowers thunder does not.

Explanation:

off the top of my head

The net ionic equation of the reaction is; \(6H^+(aq) + 3O^{2-} (aq) ------ > 3H_{2} O(l)\)

We know that the ionic reaction equation has to do with the equation that shows the species that underwent a change in the reaction. In this case, we have to be able to look at the reaction, break into ions before we can be able to make the molecular reaction equation.

We have;

Molecular equation; \(V_{2}O_{5} (s) + 6HCl (aq) ---- > 2VOCl_{3}(aq) + 3H_{2}O (l)\). We can see the species that have undergone a change from here and the net ionic equation can now be easily written as;

\(6H^+(aq) + 3O^{2-} (aq) ------ > 3H_{2} O(l)\)

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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.

Answer:

Explanation:

Here, we want to know what happens when chemical bonds are formed

The formation of chemical bonds leads to the release of energy

What this means is that the formation of chemical bonds cause energy to be released. Of important note is that the breaking of chemical bonds does not cause energy to be released

Answer: How to calculate the mass percent by using these instructions

1.The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol).

2.The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms.

Explanation:

Answer:

The concentration of the nitric acid (HNO3) solution is 72 M.

Explanation:

To determine the concentration of the nitric acid solution, we can use the concept of stoichiometry and the equation of the neutralization reaction between nitric acid (HNO3) and sodium hydroxide (NaOH):

HNO3 + NaOH → NaNO3 + H2O

The balanced equation shows that the molar ratio between HNO3 and NaOH is 1:1. This means that 1 mole of HNO3 reacts with 1 mole of NaOH.

Given:

Volume of HNO3 solution = 10.0 ml

Volume of NaOH solution = 3.6 ml

Molarity of NaOH solution = 0.2 M

To find the concentration of the HNO3 solution, we need to calculate the number of moles of NaOH used in the neutralization reaction:

moles of NaOH = volume of NaOH solution * molarity of NaOH solution

= 3.6 ml * 0.2 M

= 0.72 mmol (millimoles)

Since the molar ratio between HNO3 and NaOH is 1:1, the number of moles of HNO3 in the solution is also 0.72 mmol.

Now, we can calculate the concentration of the HNO3 solution using the formula:

concentration (in M) = moles of solute / volume of solution (in L)

concentration = 0.72 mmol / 0.010 L

= 72 mmol/L

= 72 M

Therefore, the concentration of the nitric acid (HNO3) solution is 72 M.

Answer: Ancwer C or #3

Explanation:

Energy is transferred to an object when work(mechanics) is done on the object.  Work is the transfer of energy that occurs when a force is applied to an object that causes it to move some distance.  Notice that work(mechanics) is done on the object only if the object moves; if the object does not move, no work was done.  If you try to pick up the box of books, but are unable to lift it because it is too heavy, no matter how much effort you exert, you perform no work on the box and no energy is transferred.  

Answer: b

Explanation:

The result would be the production of 0.149 grammes of hydrogen gas. At STP, 1.64 litres of hydrogen gas will be created.

Simply put, STP is 0 °C (273.15 K) and 1 atm of pressure (the old standard). You may determine the volume of an ideal gas at STP by entering those numbers into the ideal gas law and using exactly 1 mole of gas. It has a 22.4 L volume.

The chemical equation for the reaction of sodium and water is as follows:

2Na + 2H2O → 2NaOH + H2

Determine how many moles of sodium are contained in 3.4 grammes:

sodium (Na) has a molar mass of 22.99 g/mol.

3.4 g/22.99 g/mol (moles of Na) is equal to 0.148 mol.

Na = 1/2 moles, H2 = 1/2 moles, 0.148 mol, and 0.074 mol, respectively.

Calculate the volume of hydrogen gas at STP using the ideal gas law:

PV = nRT

V = nRT/P

= (0.074 mol) × (0.0821 L·atm/mol·K) × (273 K) / 1 atm

= 1.64 L

Therefore, 1.64 liters of hydrogen gas will be produced at STP.

hydrogen (H2) has a molar mass of 2.02 g/mol.

moles of H2 = 0.074 mol

mass of H2 = moles of H2 × molar mass of H2

= 0.074 mol × 2.02 g/mol

= 0.149 g

Therefore, 0.149 grams of hydrogen gas would be produced.

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Answer:

Mass = 8 neutrons + 7 protons = 15

charge = -3

element = phosphorous (P)

Explanation:

Answer:

2.29 × 10²³ formula units of MgCl₂

Explanation:

Given data:

Mass of MgCl₂ = 36.2 g

Number of formula units = ?

Solution:

The given problem will be solved by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water  = 6.022 × 10²³ formula units of water.

In 36.2 g of MgCl₂:

Number of moles = mass / molar mass

Number of moles = 36.2 g / 95.211 g/mol

Number of moles = 0.38 mol

1 mole = 6.022 × 10²³ formula units

0.38 mol / 1mol × 6.022 × 10²³ formula units

2.29 × 10²³ formula units of MgCl₂

Answer: The new volume at different given temperatures are as follows.

(a) 109.81 mL

(b) 768.65 mL

(c) 18052.38 mL

Explanation:

Given: \(V_{1}\) = 571 mL,       \(T_{1} = 26^{o}C\)

(a) \(T_{2} = 5^{o}C\)

The new volume is calculated as follows.

\(\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{571 mL}{26^{o}C} = \frac{V_{2}}{5^{o}C}\\V_{2} = 109.81 mL\)

(b) \(T_{2} = 95^{o}F\)

Convert degree Fahrenheit into degree Cesius as follows.

\((1^{o}F - 32) \times \frac{5}{9} = ^{o}C\\(95^{o}F - 32) \times \frac{5}{9} = 35^{o}C\)

The new volume is calculated as follows.

\(\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{571 mL}{26^{o}C} = \frac{V_{2}}{35^{o}C}\\V_{2} = 768.65 mL\)

(c) \(T_{2} = 1095 K = (1095 - 273)^{o}C = 822^{o}C\)

The new volume is calculated as follows.

\(\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{571 mL}{26^{o}C} = \frac{V_{2}}{822^{o}C}\\V_{2} = 18052.38 mL\)

The hardest portion of any complicated or difficult task is always the Carbon. like me, waking up from sleep and into the day requires a little additional energy.

Existing bonds must break and new ones must form for a response to happen. Only when the products are more stable than the reactants will a reaction progress. In a fire, carbon in the form of wood is changed into CO2, which is a more stable form of carbon than wood.

As a result, the reaction continues, and heat is produced. The initial heat needed to start the fire is, in this case, the activation energy. This is demonstrated by our efforts and matches that were lost.

Thus, The hardest portion of any complicated or difficult task is always the Carbon. like me, waking up from sleep and into the day requires a little additional energy.

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Answer:

[Xe]: 6s²

Explanation:

that's the noble gas config for Barium.

The electron configuration of barium (Ba) in noble gas notation is [Xe] 6s². This shorthand notation signifies that barium has chemically stable electron configuration similar to that of the noble gas xenon (Xe), plus two additional electrons in the 6s orbital.

The electron configuration of an element represents the distribution of electrons in an atom's electron shells. Barium (Ba) is a chemical element with atomic number 56 in the periodic table. Its electron configuration can be written out in full, but the noble-gas notation provides a convenient shorthand. To write the electron configuration of barium in noble gas notation, you first locate the nearest noble gas that precedes barium in the periodic table. In this case, the nearest noble gas is xenon (Xe), which has an atomic number of 54. This leaves two more electrons, which go into the 6s orbital. So, the electron configuration of barium in noble gas notation is [Xe] 6s².

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Answer:

O During photosynthesis, plants take in carbon dioxide from the air.

Answer: The answer is: During photosynthesis, plants take in carbon dioxide from the air.

Explanation: I have my ways ;>

The half life of the reaction  is 0.0087 s.

The half-life is the amount of time it takes for half of a substance (such as a radioactive isotope or a drug) to decay, disappear, or be reduced by half. In pharmacology, the half-life of a drug is the time it takes for the concentration of the drug in the body to be reduced by half.

The half-life of a substance is a useful metric for understanding its behavior over time and is used in many fields, including chemistry, biology, and physics.

We know that;

t1/2 = 1/k[A]o

t1/2 = half life

k = rate constant

[A]o = initial concentration

t1/2 = 1/7.98x10^9 * 1.46x10^-8

t1/2 = 0.0087 s

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