give the set of four quantum numbers that could represent the last electron added (using the aufbau principle) to the cl atom.

Answer:

true

Explanation:

Answer:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

Explanation:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

B.adding water, then adding solute

Adding water, then adding solute in a solution, which pair of actions could combine to keep a concentration constant. Thus option B is correct.

A solution is nothing but a  homogeneous mixture of two or more components like solute and solvent in which the particle size is smaller than 1 nm.

The component which dissolves the other component is called the solvent while the component is or are dissolved in solvent called solute.

Generally solvent is majorly available compared to the solute, both the solute and solvent are present in any state like solid, liquid or gas.

Solutions which are liquid state where the solute is solid, liquid or gas but dissolved in liquid solvent.

For example Air is a homogeneous mixture of gases, both solvent and solutes are gases.

Sugar syrup where sugar is dissolved in water. Here,  water is the solvent and sugar is the solute. Thus option B is correct.

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Answer:

Acting like a highly reflective blanket, the cryosphere protects Earth from getting too warm. Snow and ice reflect more sunlight than open water or bare ground. Changes in snow and ice cover affect air temperatures, sea levels, ocean currents, and storm patterns all over the world.

Explanation: Hope this answers your question

All intermediates in an acid-catalyzed reaction are positively charged species that are formed due to protonation by the acid catalyst. These intermediates play a crucial role in the reaction mechanism, and their reactivity and stability determine the final outcome of the reaction.

In an acid-catalyzed reaction, intermediates are formed during the reaction. These intermediates are short-lived and highly reactive species that play a crucial role in the reaction mechanism. One statement that can be made about all the intermediates in an acid-catalyzed reaction is that they are positively charged species.

The acid catalyst protonates the reactant molecules, creating positively charged intermediates. These intermediates are stabilized by the solvent, and they can react with other reactants or reagents to form the final product.

The intermediates in an acid-catalyzed reaction are usually carbocations, which are highly reactive and unstable. They can undergo various reactions such as hydride shifts or elimination to form more stable products.

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Answer:

H2C2O1

Explanation:

Answer:

Carboxylic Acid

Ester

Ether

Alcohol

Explanation:

to describe how proteins are produced

Answer:

to describe how proteins are produced

Explanation:

An empty graduated cylinder is weighs 55.5 g. when filled with the 71.5 ml of  unknown liquid, it weighs 135.0 g. The density of the unknown liquid in g/ml is 29.5 g/L.

The given data :

The mass of empty graduated cylinder = 55.5 g

The volume of the unknown liquid = 50 mL

The mass after the liquid is filled = 135 g

The mass of the liquid = total mass - mass of cylinder

                                      = 135 - 55.5

                                       = 79.5 g

The density is given as :

Density = mass / volume

             = 79.5 / 50

             = 29.5 g/ml

Thus, the density is 29.5 g/L.

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Answer:

Hg+2 + 2Cl- -> HgCl2

HOPE THIS HELPS HAVE A GREAT DAY/NIGHT!!~

Explanation:

Answer:

The square root of 20=4.472

Answer:

No.

Explanation:

Weight is the measure of the gravitational force between two massive things.

W = g . m

g = gravity

m = mass

Also, we can say that gravity is equal to G.M/d² where G is the constant of Newton's gravity, M the massa of the corp and d is their distance.

In Einstein's theory, that's not true, but it works for small gravitys.

The description of the question is the definition of density.

Answer: (C) Statements (i) and (iii)

Explanation: According to byjus.com, group VII elements are known as Halogens.

Not only that, but bbc.co.uk says " Atoms of group 7 elements all have seven electrons in their outer shell. This means that the halogens all have similar chemical reactions ."

It may just be (b) though as these are chemical reactions.

Answer:

V2O5 is the empirical formula of vanadium oxide

Explanation:

The molecular mass of Vanadium is  50.949 g/mol

Number of moles of vanadium = 0.3456 g/50.949 g/mol = 0.00696 moles

The molecular mass of Oxygen is 16.0 g/mol

Number of moles of Oxygen = (0.6330 – 0.354) g/16 g/mol = 0.0174 moles

Emperical formula  

V (0.00696 moles/0.00696 moles) O (0.0174 moles /0.00696 moles)

V 1 O2.5

Multiply by two get a whole number  

V2 O5

The elements that are nitrogen, oxygen and fluorine all of them exist as diatomic gases at room temperature.

There are total seven diatomic elements that are written as follows: hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), bromine (Br), and iodine (I). The formation of diatomic gases is done by making up two atoms of the same gas. For example, the formula for nitrogen gas is N2, the formula for oxygen gas is O2 and the formula for Fluorine gas is F2. The word diatomic has other synonym which is known as heteronuclear. The position of all these three elements in the periodic table is different so their electronegativities, the only common factor is that they exist as a gas.

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Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question we have

\(density = \frac{80}{50} = \frac{8}{5} \\ \)

We have the final answer as

Hope this helps you

Answer:

Explanation:

\(--------------------------------------------\)

According to EarthObservatory, The Earth’s mantle is mostly made of solid rock. The misconception of a liquid mantle arises from expressions like “a subducted tectonic plate sinks into the mantle” or “continental drift”, expressions that implicitly refer to the liquid element.

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Hope this helps! <3

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The number of moles of atoms in each of the following is :

1) 0.5 mol

2) 2.9 mol

3) 1.49 mol

4) 1.9 mol

1) 3.01 × 10²³ atoms of zinc

3.01 × 10²³ atoms of zinc =  (3.01 × 10²³) / (6.022  × 10²³) moles

                                          = 0.5 mol

2) 1.806 × 10²⁴ atoms of Ba

1.806 × 10²⁴ atoms of Ba = (1.806 × 10²⁴ ) / (6.022  × 10²³) moles

                                         = 2.9 mol

3) 9.03 × 10²³ atoms of S

9.03 × 10²³ atoms of S =  9.03 × 10²³ /  (6.022  × 10²³) moles

                                       = 1.49 mol

4) 1.204 × 10²⁴ atoms of Na

1.204 × 10²⁴ atoms of Na =  1.204 × 10²⁴ / (6.022  × 10²³) moles

                                          = 1.9 mol

Thus, The number of moles of atoms in each of the following is :

1) 0.5 mol

2) 2.9 mol

3) 1.49 mol

4) 1.9 mol

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The plastic straws were placed under the wooden block to increase the surface area of the ramp. Hence, option C is correct.

Surface area is the measure of how much exposed area a solid object has expressed in square units.

The plastic straws were placed under the wooden block to increase the surface area of the ramp because putting straws will increase the area which has cylindrical hollow space inside the straw.

Hence, option C is correct.

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Nitrogen is oxidized in this reaction and Oxygen is reduced in this reaction.

In the given reaction:

\(N_2H_4(l) + 2H_2O_2(l) \rightarrow N_2(g) + 4H_2O(g)\)

The oxidation states of the elements involved need to be considered to determine which species is oxidized and which is reduced.

In \(N_2H_4\), nitrogen (N) has an oxidation state of -2 and hydrogen (H) has an oxidation state of +1.

In \(H_2O_2\), oxygen (O) has an oxidation state of -1 and hydrogen (H) has an oxidation state of +1.

In nitrogen (N) has an oxidation state of 0.

In water, oxygen (O) has an oxidation state of -2 and hydrogen (H) has an oxidation state of +1.

During the reaction, the oxidation states of the elements change. Nitrogen in  \(N_2H_4\) is oxidized from -2 to 0 in nitrogen, indicating that it has lost electrons and undergone oxidation. Therefore, nitrogen is oxidized in this reaction.

On the other hand, oxygen in  \(H_2O_2\) is reduced from -1 to -2 in  \(H_2O_2\), indicating that it has gained electrons and undergone reduction. Therefore, oxygen is reduced in this reaction.

To summarize:

- Nitrogen (N) is oxidized.

- Oxygen (O) is reduced.

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In the process of alcoholic fermentation, pyruvic acid is converted to carbon dioxide and ethanol.

Alcoholic fermentation is an enzyme-catalyzed metabolic process that happens in yeast and other bacteria. It involves the conversion of glucose and other carbohydrates into ethanol and carbon dioxide.

The glycolysis byproduct pyruvic acid is transformed during this process by enzymes like alcohol dehydrogenase and acetaldehyde dehydrogenase into ethanol and carbon dioxide.

In addition to providing the body with energy and carbon dioxide, this process is a crucial industrial step in the creation of alcoholic beverages like wine, beer, and spirits.

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The pressure deviates from ideality more in a smaller container as compared to large container due to less volume of the container.

The deviation of gases from the ideal behavior is depend on the two main factors i.e. the volume of gas molecules and the force of attraction between the gas molecules. The collisions between the molecules of gas are considered as perfectly elastic.

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To determine the partial pressure of H2 gas (a), we need to subtract the vapor pressure of water at 16 °C (14 mmHg) from the total pressure of the gas collected (758 mmHg).

Partial pressure of H2 gas (a) = Total pressure - Vapor pressure of water

= 758 mmHg - 14 mmHg

= 744 mmHg

Therefore, the partial pressure of H2 gas is 744 mmHg.

To calculate the number of moles of H2 gas produced (b), we can use the ideal gas law equation: 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.

First, we need to convert the temperature from Celsius to Kelvin:

T = 16 °C + 273.15 = 289.15 K

Now we can rearrange the ideal gas law equation to solve for the number of moles:

n = PV / RT

n = (744 mmHg * 425 mL) / (0.0821 L·atm/mol·K * 289.15 K)

= 0.128 moles of H2 gas

Therefore, approximately 0.128 moles of H2 gas were produced in the reaction.

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Answer:

NASA uses rockets to launch astronauts and supplies to the International Space Station. Launching a rocket relies on Newton's Third Law of Motion. A rocket engine produces thrust through action and reaction. The engine produces hot exhaust gases which flow out of the back of the engine.

Explanation:

If a battery acid solution is a strong electrolyte, battery acid is highly ionized. So the correct option is d.

If a solution is a strong electrolyte, it means that it ionizes completely in solution, resulting in a high concentration of ions. In the case of battery acid, which is typically sulfuric acid, it is a strong electrolyte because it ionizes almost completely in solution, producing a high concentration of hydrogen ions (H+) and sulfate ions (SO42-). This high ion concentration allows for a flow of electrons between the positive and negative terminals of the battery, producing an electric current. Therefore, option C is the correct answer.

If a battery acid solution is a strong electrolyte, this means that it is highly ionized. In other words, when the acid is dissolved in water, it breaks apart into ions that can conduct electricity. A strong electrolyte dissociates completely into its constituent ions when dissolved in water, meaning that there is a high concentration of ions in solution. This is in contrast to a weak electrolyte, which only partially dissociates in water and has a lower concentration of ions in solution. The fact that battery acid is a strong electrolyte is important because it allows it to conduct electricity, which is essential for its use in batteries. However, it also means that the acid is highly corrosive and can cause serious injury if not handled properly.

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The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is -5084.3 kj.

Internal energy, U is a thermodynamic property that refers to the energy of a system. It is given by the sum of the kinetic and potential energies of the particles that make up the system. The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is -5084.3 kj.

This means that during the combustion of 1.0 mol of octane, the internal energy of the system decreases by 5084.3 kJ. The negative sign indicates that the process is exothermic since energy is being released from the system.This means that the internal energy of the system decreased by 5084.3 kJ. Since the change in internal energy is negative, the reaction is exothermic. This implies that the combustion reaction generates energy as it progresses. This is reasonable because the combustion of octane is a well-known exothermic reaction that releases a significant amount of energy

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Explanation:

you can use Born-Lande equation,

U=-(A×e^2×Z+ ×Z- ×N)\r ×(1-1/n)

here,U=lattice energy

A=madelung constant

n=Born exponent(depends on repulsion between ion)

e=charge of electron

Z+,Z-=charge of cation and anion

r=distance between cation and its neighbour anion in

space lattice