“The element has high Ionization energy quote is an example of an observation. A. I agree with the statement. Be. I agree with the statement. Explain your answer use an example from your investigation about periodic trends

Rearranging the equation, mole molecular weight = mass, mass = molecular weight mole, and mole = mass / mol (multiply all sides by molecular weight).

Molecular formula: What is it?

The quantity of each element's atoms in one molecules of a chemical is expressed by the molecular formula. The formula that displays the precise figure of each atom within a molecule is known as a molecular formula. The Chemical Formula is determined using the empirical method whenever the molecular mass value is known. n = molar mass/empirical mass

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This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li

To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.

Let's analyze the given representations:

36Li:

This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.

613C:

This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.

3063Cu:

This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.

1530P:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.

Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.

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The pressure, in atmospheres, exerted by a 0.100 mol sample of oxygen in a 2.00 L container at 273 °C is 2.24 × 10⁰ atm.

The pressure of a substance can be calculated using the following formula;

PV = nRT

According to this question, the pressure, in atmospheres, exerted by a 0.100 mol sample of oxygen in a 2.00 L container at 273 °C can be calculated as follows:

P × 2 = 0.1 × 0.0821 × 546

2P = 4.48266

P = 2.24 × 10⁰ atm

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Answer: The answer is incus

Answer:

The percent composition of fluorine is 65.67%

Explanation:

Percent Composition is a measure of the amount of mass an element occupies in a compound. It is measured in percentage of mass.

That is, the percentage composition is the percentage by mass of each of the elements present in a compound.

The calculation of the percentage composition of an element is made by:

\(percent composition element A=\frac{total mass of element A}{mass of compound} *100\)

In this case, the percent composition of fluorine is:

\(percent composition of fluorine=\frac{39.6 g}{60.3 g} *100\)

percent composition of fluorine= 65.67%

The percent composition of fluorine is 65.67%

Answer:

The percent composition of fluorine is 65.67%

Explanation:

Percent Composition is a measure of the amount of mass an element occupies in a compound. It is measured in percentage of mass.

That is, the percentage composition is the percentage by mass of each of the elements present in a compound.

The calculation of the percentage composition of an element is made by:

In this case, the percent composition of fluorine is:

percent composition of fluorine= 65.67%

The percent composition of fluorine is 65.67%

Only Ag2CO3 will precipitate from the solution.

When Na2CO3 is added to the solution, it will react with the Ag^+ and Pb^2+ ions to form precipitates of Ag2CO3 and PbCO3. The Mn^2+ ion concentration is not high enough to form a precipitate with Na2CO3.

First, let's calculate the initial concentration of Ag^+ and Pb^2+ ions in the solution:

Ag^+: 0.00050 M

Pb^2+: 0.00050 M

Next, we need to calculate the concentration of Na2CO3 after it is added to the solution. Since we added 10.00 ml of 1.0*10^-6 M Na2CO3 to a total volume of 500 ml, the final concentration of Na2CO3 is:

[Na2CO3] = (10.00 ml / 500 ml) * 1.010^-6 M

[Na2CO3] = 2.010^-8 M

Now we can use the Ksp values to determine which precipitates will form.

For Ag2CO3:

Ksp = [Ag^+]^2[CO3^2-]

8.110^-12 = (2x)^2 (2x)

8.110^-12 = 4x^3

x = 2.0*10^-4 M

Since the concentration of CO3^2- is higher than the solubility product, Ag2CO3 will precipitate.

For PbCO3:

Ksp = [Pb^2+][CO3^2-]

7.410^-14 = (0.00050 M)(2x)

x = 9.210^-11 M

Since the concentration of CO3^2- is lower than the solubility product, PbCO3 will not precipitate.

Therefore, the only precipitate that will form is Ag2CO3.

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A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.

Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.

Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.

Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.

Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.

The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.

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Answer:

C. 6.52 x 10^14 Hz

Explanation:

hope this helps

It is nearly impossible to go  a week without any chemical reactions as chemical changes take place around us like rusting of metal articles and acid base reactions.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

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Answer:

its has to be AAAAAAAAAA

Answer:

The answer is A

Explanation:

Molar concentration of Zn2+ions in a solution is 3.481 mol/lit

The electrode potential value is 59mV

Temperature=298k

What is electrode potential?

equation formed- Zn → Zn2+ + 2e

              from Nernst equation-

E=E cell - 0.059 log [Zn2+]

[zn2+]=3.481 mol/lit

hence, Molar concentration of Zn2+ions in a solution is 3.481 mol/lit

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Answer:

heat, electrical, mechanical, nuclear,sound

Explanation:

The power plant is mechanicalised so it produce heat which is in form of electrical and then we start hearing sound

Marlin conducted an experiment in which  independent variable is receiving an ointment and an dependent variable is number of anemone stings.

The people in the control group were neighbors in group B. The independent variable is the application of the ointment. The dependent variable is the number of  anemone stings. Marlin’s conclusion should be that the ointment was successful in reduce the stinging power of the anemone.  The eight people in group B reported feeling better because they believed that they were receiving the protective ointment.

An experiment must always have a dependent variable and an independent variable. The dependent variable is the variable that changes when the independent variable is manipulated.

In this case, the dependent variable is the number of anemone stings and the independent variable is the application of the ointment.

The experimental group (group A) received the ointment and a significant number of 30 participants reported feeling better meaning that the ointment was successful at protecting participants from anemone stings.

The control group (group B ) did not receive the ointment but received a placebo. Eight participants in that group reported feeling better because they believed that they received the protective ointment.

The experiment is successful and the ointment have been shown to protect people against anemone stings because more than 60% of the participants in the experimental group reported lesser anemone stings whereas only 16% of participants in the control group reported feeling better.

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Answer:

b. What is the independent variable?

Answer:

Fe2O3 - S

PbO2 - D

PbO - I

Fe2O - U

Fe(OH)3 - H

FeO2 - T

FeO - R

Pb2O - G

Pb(OH)2 - O

FeOH - N

Pb(OH)3 - A

Explanation:

In writing the formula of ionic compounds we consider the valency or oxidation state of each ion.

For instance, given the compound iron II oxide. The oxidation states of both iron and oxygen are +2 and -2 respectively. Ignoring the charges, this cancels out and we have FeO as the correct formula of the compound.

For Iron III oxide, the oxidation states of iron and oxygen are +3 and -2 respectively, the both atoms exchange charges. If we ignore the signs and write the exchanged numbers as subscripts we obtain the formula Fe2O3.

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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The age of wood 2880 years.

People who passed away would be interred in the tombs of the Ancient Egyptians.This was significant to the Egyptians because they held the view that as long as a person was properly buried in their tomb, life remained even after death.

The sarcophagus was intended to serve as the occupants' eternal home in the afterlife, according to ancient Egyptian belief.Pharaohs and rich citizens' sarcophagi were ornately decorated with carvings and painting.

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Answer:

1. Galvanic oxidation. Example is the corrosion of aluminium wires when in contact with copper wires under wet conditions.

2. Rainwater or Damp/moist air

3. Chromium-plated steel screws or stainless steel screws or galvanized steel screws

Explanation:

1. Galvanic oxidation or corrosion occurs when two different metals with different electrode potentials are brought into contact with each other by means of an electrolyte (usually a aqueous solution), such that a redox reaction occurs leading to one metal with the more negative electrode potential (the anode) becoming oxidized, while the other less negative potential (the cathode) is reduced.

In order for galvanic corrosion to occur, three elements are required.

i. Two metals with different corrosion potentials (anode and cathode)

ii. Direct metal-to-metal electrical contact

iii. A conductive electrolyte solution (e.g. water) must connect the two metals on a regular basis.

For example oxidation (corrosion) of aluminium wires when in contact with copper wire under wet conditions.

2. The most likely electrolyte will be rainwater containing dissoved solutes (if the panel is in an exposed part of the house) or damp/moist air.

3. From the table, the most likely screw will be chromium-plated steel screws or stainless steel (made of iron and nickel) screws or galvanized steel (zinc-plated) screws.

All these possible screw components have a more negative electrode potential than copper. Thus they will serve as the anode in a galvanic oxidation with copper.

Answer:

The answer is A ahahahha

Explanation:

Because it just is

Answer:

We need chemistry in nursing because it deals with various kinds of drugs and the reactions of these drugs on the human body as well as with each other.

Answer:

Explanation:

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

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

From the question

mass of rock = 12.947 g

Volume of rock = final volume of water - initial volume of water

Volume = 46.2 mL - 41.3 mL = 4.9 mL

Substitute the values into the the above formula and solve for the density

That's

\(Density = \frac{12.947}{4.9} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 2.642244\)

We have the final answer as

Hope this helps you

The soluble in water substances are:Ch3CHO is more soluble in water than CH3CH2CH3.

Ch3CO2H is more soluble in water than (CH3)3COCH3.

(CH3)3CCH2OH is more soluble in water than CH3(CH2)6OH.

In comparison to (CH3)3CCOOH, CH3(CH2)4COOH is more soluble in water.

CH3CH2OH is more soluble in water than CCl4.

CH3OH is more soluble in water than CH3CH2OH.

Ch3CHO (Acetaldehyde) is more soluble in water than Ch3CH2CH3 (Propane). This is due to Acetaldehyde containing a polar C=O bond which is hydrogen bonding with water molecules and is thus more soluble.

Ch3CO2H (Acetic Acid) is more soluble in water than Ch3(CO)OCH3 (Acetone). This is due to Acetic Acid containing an acidic hydrogen atom which is hydrogen bonding with water molecules and is thus more soluble.

(CH3)3CCH2OH (2-Methyl-2-propanol) is more soluble in water than Ch3(CH2)6OH (Hexanol). This is due to 2-Methyl-2-propanol containing a polar OH bond which is hydrogen bonding with water molecules and is thus more soluble.

Ch3(CH2)4COOH (Butyric Acid) is more soluble in water than (CH3)3CCOOH (2,2-Dimethylpropionic Acid). This is due to Butyric Acid containing an acidic hydrogen atom which is hydrogen bonding with water molecules and is thus more soluble.

Ch3CH2OH (Ethanol) is more soluble in water than CCl4 (Carbon Tetrachloride). This is due to Ethanol containing a polar OH bond which is hydrogen bonding with water molecules and is thus more soluble.

Ch3OH (Methanol) is more soluble in water than Ch3CH2OH (Ethanol). This is due to Methanol containing a strong hydrogen bond which is hydrogen bonding with water molecules and is thus more soluble.

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Compression happens when molecules are forced, or pressed, together. Rarefaction is just the opposite, it occurs when molecules are given extra space and allowed to expand.

In a longitudinal wave, the compression zone is where the particles are closest to one another. In a longitudinal wave, a rarefaction occurs where the particles are the furthest distant from one another.

Compression refers to the area where the medium is compressed, and rarefaction refers to the area where the medium is spread out.

Compression happens when molecules are forced, or pressed, together. Rarefaction is just the opposite, it occurs when molecules are given extra space and allowed to expand.

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Answer:

Here's the answer. It's on the photo. Basically, the liquids are moving around, fast and shortly, when they become solid, they slowly stop moving and become still hope i helped :)

The intermolecular force increases and the particles of liquid come together in a proper arrangement when it freezes into a solid.

The matter is composed of incredibly minute particles, which are so microscopic that humans cannot see them with the unaided eye.

It has been noted that matter may be found in nature in a variety of shapes. There are certain materials that are hard and have a defined shape, like wood and stone; others that can flow and adopt the shape of their container, like water; and yet others that have no set shape or size, like air.

According to their physical characteristics and the states in which they are found, or states of matter, the matter may be divided into many groups.

The fundamental three states of matter are as follows:

In addition to the three just described, there are two more states of matter that we do not see frequently. They are Bose-Einstein condensate and plasma.

States of matter are distinguished by variations in their physical properties that are caused by external factors like pressure and temperature.

Therefore, when a liquid cools down to solids, the intermolecular force increases, and the particles of the liquid come together in a proper arrangement.

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Answer:

The hydrogen ion concentration in mol/L

Explanation:

Answer:

The pH of a solution is a measure of hydrogen ion concentration in mol/L

Explanation:

the concentration of hydrogen ions in a solution expressed usually in moles per liter or in pH units and used as a measure of the acidity of the solution

Answer:

its sodium hydroxide

Explanation:

Answer:

The answer is 10cm^3

Explanation:

5x1x2=10

Mind marking me brainliest? :)

Answer:

B-7

Explanation:

13-6=7

ANSWER

The original concentration of the solution is 0.147 mol

EXPLANATION

Given that;

The volume of water is 350.0mL

The volume of NaCl solution is 2.3L

The final concentration of the solution is 0.967M

To find the original concentration of the solution, follow the steps below

Step1: Write the dilution formula

Where

• M1 is the original concentration of the solution

• V1 is the original volume of the of the solution

• M2 is the final concentration of the solution

• V2 is the final volume of the solution

Step 2: Convert the volume of water to L

Recall, that 1mL is equivalent to 0.001L

Step 3; Find the original concentration of the solution by substituting by the given data into the formula in step 1

Hence, the original concentration of the solution is 0.147 mol