A small amount of bleach was accidentally spilled on a kitchen floor. After a while it was
observed that the floor appeared to be dry and the whole kitchen smelled of bleach.
Which processes have occurred?
A
Evaporation and diffusion
B
Distillation and diffusion
с
Evaporation only
D
Evaporation and Brownian motion

If the volume of the container is reduced by 50% at constant temperature, the equilibrium will shift towards the side of the reaction with fewer moles of gas, i.e., towards the tert-butyl alcohol side.

The provided reaction is an example of a thermal decomposition process in which tert-butyl alcohol decomposes at 450°C into isobutene and water. The reaction is reversible, and equilibrium is reached when the rates of the forward and reverse reactions equalise.

The balanced equation for the reaction is:

(CH₃)₃COH(g) ⇌ (CH₃)₂CCH₂(g) + H₂O(g)

The concentrations of all the chemicals stay constant at equilibrium. However, reducing the volume of the container by 50% at constant temperature causes the pressure inside the container to rise proportionally. The system will strive to counterbalance this change by moving the equilibrium in the direction that produces less moles of gas, according to Le Chatelier's principle.

In this scenario, the reaction generates two moles of gas on the surface.

The system will strive to counterbalance this change by moving the equilibrium in the direction that produces less moles of gas, according to Le Chatelier's principle.

The reaction produces two moles of gas on the left side and one mole of gas on the right side in this case. As a result, the equilibrium will shift to the reaction's left side, i.e., the tert-butyl alcohol side, which yields less moles of gas.

As a result, tert-butyl alcohol and water concentrations will rise and isobutene concentrations will fall until a new equilibrium is reached.

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Answer:

1. Heat

2. Temperature

3. convection

4. Conduction

5. Radiation

The statement concludes that the partition x2 = 105 is the better split for achieving purity.

The most accurate statement is:

d. The partition x2 = 105 creates a lower MSE; therefore, it is the better split for achieving purity.

To understand why this statement is accurate, let's break it down step by step:

1. MSE stands for Mean Squared Error. It is a measure used to evaluate the quality of a split in decision tree algorithms.

2. In this case, we are comparing two partitions: x1 = 131 and x2 = 105.

3. The statement says that the partition x2 = 105 creates a lower MSE. This means that the average squared error for the data points in this partition is lower compared to the partition x1 = 131.

4. Achieving purity in decision trees means creating splits that separate the data points of different classes as cleanly as possible. A lower MSE indicates that the split is better at achieving this goal.

5. Therefore, the statement concludes that the partition x2 = 105 is the better split for achieving purity.

To summarize, the statement is accurate because it correctly identifies the partition that creates a lower MSE as the better split for achieving purity.

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Answer:

It's Mass

Explanation: I took the quiz

Have a good day!

Mass is the amount of matter in an object. Therefore, option C is correct.

Mass can be defined as an intrinsic property of a body. mass can be described as the quantity of matter in a body. Different atoms and different particles with the same amount of matter have nonetheless different masses.

Mass can be experimentally measured by the body's inertia, meaning the resistance to acceleration when a net force is applied. The mass determines the strength of its gravitational attraction to other bodies.

The SI base unit of measurement of mass is the kilogram (kg) and it is not the same as weight. Mass is generally determined by measuring the weight using a spring scale, rather than a balance scale and comparing it to known masses.

An object on the Moon will weigh less than it does on Earth due to the lower gravity but still have the same mass. Weight can be defined as a force, while mass is the property that determines the strength of this force.

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The element having 8 valence electrons and 4 energy levels is krypton, (Kr)  it is a noble gas included in 18th group.

Krypton is 36th element in periodic table with main shell electronic configuration, K= 2, L= 8, M= 18 and N= 8 where, K, L, M and N are energy levels.

Krypton is in the group noble gases also called inert gases. The group members of Kr are, Helium, argon and xenon. Thus krypton is the element with 4 energy levels and 8 valence electrons.

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Answer:

The correct option is;

Cylinder A contains a gas that has a temperature closest to absolute zero

Explanation:

From the kinetic theory of gases, the average speed of a gaseous molecule is found from the following equation;

\(v_{rms} = \sqrt{\frac{3\cdot R \cdot T}{MW} }\)

Where:

\(v_{rms}\) = rms speed which is the square root of the average of the velocities of the gas molecules squared which is used in place of the average of the gas molecules as the sum of the velocities of all the gas molecules in the cylinder is zero

R = Universal gas constant = 8.3145 J/(mol·K)

MW = Molecular weight of the gas

Hence where we have;

\(v_{rmsA}\) = Average velocity of gas A = 0.0000001 m/s

\(v_{rmsB}\) = Average velocity of gas B = 0.3 m/s

Since, R and MW are constant for the gas in cylinder A constant, therefore, as \(v_{rmsA}\) ≈ 0 m/s, the temperature, \(T_A\), of gas A is closest to absolute zero.

Answer: 0.00625 moles Mg(OH)2

Explanation: 250  mL = 0.0250 L of KOH

0.0250 L KOH (0.50M KOH / 1L KOH) (1 mole Mg(OH)2 /2 moles KOH)

= 0.00625 moles Mg(OH)2

0.25 moles of magnesium hydroxide are formed during the reaction.

The moles of magnesium hydroxide formed can be determined during the reaction using the balanced chemical equation. In the balanced chemical equation given, two moles of potassium hydroxide react with one mole of magnesium nitrate to produce one mole of magnesium hydroxide.

Therefore, if 0.50 mol of potassium hydroxide reacted, 0.25 mol of magnesium nitrate was used since the stoichiometric ratio is 2:1 as given in the equation.

Using the volume and molarity of the potassium hydroxide solution, the amount of potassium hydroxide used in the reaction can be calculated. Therefore, the amount of KOH used is equal to 0.250 L x 2.0 mol/L which is 0.50 mol of KOH. Using the stoichiometric ratio, the amount of magnesium hydroxide formed can be determined which is 0.25 mol.

Therefore, 0.25 moles of magnesium hydroxide are formed during the reaction.

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Answer:

If the atmospheric pressure is lower than 760 torr, then the boiling temperature will be less than 100equationC.

B. 97.7°C

Explanation:

The question mentions the fact that temperature and pressure are directly proportional. This means that if one quantity is increasing the other increases simultaneously and vice versa.

Hence, if the atmospheric pressure is lower than 760 torr, then the boiling temperature will be less than 100equationC.

From;

PαT

P=kT

Hence

P/T = k

P1/T1 = P2/T2

P1T2 = P2T1

P1 =  760 torr

T1 = 94°C

T2 = ?

P2 = 790 torr

T2 =  P2T1/P1

T2 = 790 * 94/760

T2 = 97.7°C

Answer:  NaNO3 (Sodium Trioxonitrate (V) )

Explanation:

The equation of the reaction is; HNO3 + NaOH -----> H2O + NaNO3

Answer: its B

Explanation:

Percent yield = 78.7% , the correct answer is D) 78.7%, which represents the percent yield of NaCl in the reaction.

To calculate the percent yield of NaCl in the given chemical equation, we need to compare the actual yield of NaCl with the theoretical yield. The theoretical yield is the amount of NaCl that would be produced if the reaction went to completion based on stoichiometry.

First, we need to determine the theoretical yield of NaCl. By examining the balanced equation, we can see that the stoichiometric ratio between CuCl2 and NaCl is 1:2. This means that for every 1 mole of CuCl2, 2 moles of NaCl are produced.

Step 1: Convert the mass of CuCl2 to moles using its molar mass.

Molar mass of CuCl2 = 63.55 g/mol (atomic mass of Cu) + 2 × 35.45 g/mol (atomic mass of Cl)

Molar mass of CuCl2 = 134.45 g/mol

Moles of CuCl2 = 31.0 g / 134.45 g/mol ≈ 0.231 mol

Step 2: Use the stoichiometry to calculate the theoretical yield of NaCl.

Since the stoichiometric ratio between CuCl2 and NaCl is 1:2, the moles of NaCl produced will be twice the moles of CuCl2.

Moles of NaCl (theoretical) = 2 × 0.231 mol = 0.462 mol

Step 3: Convert the moles of NaCl to grams using its molar mass.

Molar mass of NaCl = 22.99 g/mol (atomic mass of Na) + 35.45 g/mol (atomic mass of Cl)

Molar mass of NaCl = 58.44 g/mol

Theoretical yield of NaCl = 0.462 mol × 58.44 g/mol ≈ 26.96 g

Now, we can calculate the percent yield using the formula:

Percent yield = (Actual yield / Theoretical yield) × 100

Percent yield = (21.2 g / 26.96 g) × 100 ≈ 78.7%

Option D

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Answer:

Clay and Pumice can both be said to be Porous but they are not Permeable

Explanation:

A porous substance is one which have pores in in through which air or liquid can pass through. Both clay and pumice are porous due to the presence of pores in them. These pores allow air to pass through them. However, since the pores are not well connected water do no pass through them. As a result, clay vessels can hold water within them and pumice floats on water.

Permeability is the ability of a substance to allow other substances to pass through. Both clay and pumice have low permeability, as a result they do not allow water to pass through them. Rather, water runs over their surface when poured over them.

Answer:

Clay and Pumice can both be said to be Porous but they are not Permeable

Explanation:

Answer:

a chemical reaction occured

Explanation:

bubbling and fizzing after adding a substance, most offten means a chemical reaction is happening

An atom is the submicroscopic particle that constitutes the fundamental building block of ordinary matter.

Everything that takes up space and has mass is considered to be matter. Atoms are the minuscule constituents of matter. Therefore, these atoms are thought of as the fundamental units of matter. They are frequently referred to as subatomic particles because they are what make up atoms. There are three subatomic particles: protons, neutrons, and electrons.

Atoms are the basic building blocks of matter and make up all matter at its most basic level. These atoms frequently come together to create molecules, which are made up of two or more atoms connected to one another in particular geometric configurations.

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The molecular formula if the molar mass is 92 g/mol if the empirical formula is nitrogen dioxide then the molecular formula is N₂O₄.

An empirical formula is a simple expression of the relative numbers of atoms of each element present in a compound. It is typically written as a chemical formula in the form of a whole number ratio, such as CH2O for glucose, denoting that there are two atoms of hydrogen for every one atom of carbon and one atom of oxygen. Empirical formulas are not the same as true chemical formulas, which also list the arrangement of atoms in a compound.

Molecular formula = (empirical formula) × \(\frac{molar mass}{empirical formula mass}\)

Empirical formula for nitrogen dioxide is NO₂

Empirical formula mass = 2×(16)+32 = 64

Molecular Formula = NO₂ x (\(\frac{92}{64}\)) = NO₂ x 1.4375 = \(N_1_._4_3_7_5O_2_._8_7_5\)

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Answer:

Cesium. Full electron configuration of cesium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s1. xenon ← cesium → barium

Explanation:

most include 36. :-]

The number of the molecules of oxygen that is required is 1.1 * 10^23 molecules.

The balanced reaction equation can be quite helpful here.

We have the reaction equation in this case as 4NH3 + 5O2 → 4NO + 6H2O

Number of moles of ammonia = 2.3 g/17 g/mol = 0.14 moles

If 4 moles of ammonia reacts with 5 moles of oxygen

0.14 moles of ammonia will react with 0.14 * 5/4

=0.175 moles

The number of oxygen molecules becomes;

0.175 moles * 6.02 * 10^23

= 1.1 * 10^23 molecules

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Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

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

From the question

mass of sample = 14.5 g

Density = 13.6 g/cm³

The volume is

\(volume = \frac{14.5}{13.6} \\ = 1.06617647058\)

We have the final answer as

Hope this helps you

Noble gas electron configuration for  ion silver, Ag+ is Ag⁺ = [Kr] 4d¹⁰

Noble gas Electronic configuration for Ag is :

atomic number of silver, Ag is 47.

¹⁰⁸Ag₄₇ = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²  4p⁶ 4d⁹ 5s²

there is exception : Half filled and full filled d orbital are more stable than the one electron is less. so one electron moves from s orbital to d orbital to make it more stable. so the correct electronic configuration is as follows :

¹⁰⁸Ag₄₇ = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²  4p⁶ 4d¹⁰ 5s¹

now for Ag⁺ , we loose one electron. so, the electronic configuration is :

Ag⁺  = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²  4p⁶ 4d¹⁰

noble gas configuration for Ag⁺ ion is as follows:

Ag⁺ = [Kr] 4d¹⁰

Thus, Noble gas Electronic configuration for Ag is : Ag⁺ = [Kr] 4d¹⁰ , Ag+ is Ag⁺ = [Kr] 4d¹⁰

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Answer:

Many scientists view biofuels as inherently carbon-neutral: they assume the carbon dioxide (CO2) plants absorb from the air as they grow completely offsets, or “neutralizes,” the CO2 emitted when fuels made from plants burn.

Explanation:

put in your own words, happy to help

To solve such this we must know the concept of combustion reaction. Therefore, the missing word is neutral that is Biofuels are therefore described as being carbon neutral.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

When biofuels are burned they release the same amount of carbon dioxide as was removed from the atmosphere by the plant. Biofuels are therefore described as being carbon neutral. the products of combustion reaction are carbon dioxide and water.

Therefore, the missing word is neutral.

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Answer:

The temp is 176k

Explanation:

Answer:

8.14x6.022×10^23 ~ 4.901908x10^24

Explanation:

The mass number of Carbon-12 is 12. The mass number of Carbon-14 is 14. Therefore, carbon-14 has a mass that is 2 more than carbon-12.

An isotope is a species of an element having the same atomic number but a different atomic mass due to a change in the number of neutrons. Carbon-14 is an isotope of carbon with 6 protons and 8 neutrons in the nucleus. Carbon-14 is a radioactive isotope that is used to date once-living organic materials.

It is formed in the Earth's upper atmosphere when nitrogen is bombarded by cosmic rays. Carbon-14 has a half-life of 5,700 years and decays into nitrogen-14 by emitting beta particles.

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In the given Experiment 5, the Formation and Naming of Ionic Compounds, the focus is on observing the changes that occur when cations and anions are mixed together. Two visible changes that may occur during this experiment include the formation of a precipitate and a change in color. A precipitate forms when the cation and anion combine to create an insoluble solid. A color change indicates a chemical reaction has taken place between the two ions.

To indicate that no visible change occurred when a cation and anion were mixed, the abbreviation "NC" (no change) will be used. This helps differentiate between reactions that had visible changes and those that did not.

In this experiment, a specific number of drops of anion will be placed into a well on the well plate. Generally, this number will be given in the procedure, and you should follow the instructions provided in your lab manual or by your instructor.

The cations used in this experiment may vary, but some common examples include: sodium, calcium, magnesium , and copper . These cations will be mixed with various anions to form different ionic compounds, allowing you to observe and identify the reactions that take place.

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Answer:

emprical weight=ch2o

=12*12*1*1*16 =30

Molecular mass=n*emprical weight

60=n*30

N=60/30=2

Molecular formula=n*emprical formula=2*30

=60

C2h4o2

Hope this helps :)

Potassium is fundamental for neuron activity. If a body does not have enough potassium, then the neuron will struggle to fire because there will not be enough positively charged ions to trigger the firing of the neuron.

The potassium (K+) is maintained at a high level within the neuron at rest, whereas sodium (Na+) is maintained at a high level outside of the cell.

Neurons contain K+ and Na+ leakage channels that allow the two ions to diffuse in favor of a concentration gradient.

Depolarization opens both K+ and Na+ channels in the membrane, thereby these ions can flow out and into the axon, respectively.

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If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

What is pressure?

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Various units are used to express pressure. Some of these are units of force divided by units of area. For example, the SI unit of pressure, Pascal (Pa), is 1 Newton per square meter (N/m2). Similarly, pounds force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in imperial and US systems. Pressure can also be expressed as standard atmospheric pressure. Atmospheric pressure (atm) is equal to this pressure and torr is defined as 1/760 of this. Manometric units such as centimeters of water, millimeters of mercury, and inches of mercury are used to express pressure as the height of a particular liquid column within a manometer.

If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

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The chemical reaction in which energy is released is referred to as an Exothermic reaction.

This is the type of reaction in which the overall standard enthalpy change is negative.

This is however as a result of the energy being released when a chemical reaction takes place under certain conditions.

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The molar concentration of the solution containing 3.0 moles of NaCl in 325 milliliters of water is approximately 9.23 M.

To calculate the molar concentration of a solution, we use the formula:

Molar Concentration (M) = Moles of solute / Volume of solution (in liters)

In this case, we have 3.0 moles of NaCl and 325 milliliters of water. First, we need to convert the volume of the solution to liters by dividing it by 1000:

Volume of solution = 325 mL / 1000 = 0.325 L

Now we can substitute the values into the formula to calculate the molar concentration:

M = 3.0 moles / 0.325 L

M = 9.23 M

Therefore, the molar concentration of the solution containing 3.0 moles of NaCl in 325 milliliters of water is approximately 9.23 M.

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