3. How many moles are in 100. grams of nitrogen gas (N2)?

I NEED HELO ASAP PLEASE

Answer:

Coyotes, Bald Eagles, & Gray wolf.

Answer: In a vacuum, the objects fall at the same rate independent of their respective masses. That means coin and feather both reach ground at same time in a vacuum. Larger objects experience more air resistance than smaller objects. Also, the faster an object falls, the more air resistance it encounters.

Explanation:

One mole of magnesium chloride has a mass of 95 g. Then the mass of 4.25 moles of magnesium chloride (MgCl₂) is 403.7 g.

Magnesium chloride is an ionic compound with the chemical formula, MgCl₂. It formed through the donation of two valence electrons from the metal magnesium to the chlorine atoms.

The mass of one mole of a compound is called its molar mass. The number of moles of the compound is then the ratio of its given mass to the molar mass.

Atomic mass of Mg = 24 g/mol

atomic mass of Cl = 35.5 g/mol

mass of 2 Cl = 71 g

Then, molar mass of MgCl₂ = 24 +  71 g = 95 g/mol

One mole of  MgCl₂ is 95 g. Then, mass of 4.25 moles of MgCl₂ is

4.95 × 95 = 403.7 g

Therefore, the mass of 4.95 moles of MgCl₂ is 403.7 g.

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pCO2 is an important factor that affects various aspects of water chemistry and the impacts of ocean acidification. When pCO2 increases, the concentration of total CO2 dissolved in water also increases. This leads to changes in pH, which decreases due to increasing atmospheric CO2 concentration.

When pCO2 rises, the concentration of only CO2 dissolved in water increases. The dissolved CO2 forms carbonic acid, which contributes to the acidification of the ocean. This increase in CO2 affects the equilibrium between CO2, HCO3-, and CO3^2-, shifting it towards higher levels of dissolved CO2 and H+ ions, resulting in a lower pH.

In terms of the impacts of ocean acidification on different organisms, the effects can vary depending on their specific needs. An organism that requires CO2 is likely to fare better under ocean acidification since the increase in dissolved CO2 can provide them with a favorable environment. However, organisms that rely on HCO3- or CO3^2- may fare worse under ocean acidification, as the lower pH interferes with the availability of these carbonate ions, which are essential for shell formation and calcification in some marine organisms.

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Answer:

D

Explanation:

Explanation:

The general formula of an alkane is given as;

        CₙH₂ₙ₊₂

n is the number of the member;

 For the 97th member in the series;

 n  = 97;

 2n + 2  = 2(97) + 2  = 196

So, the 97th member is;

                C₉₇H₁₉₆

This is how to apply the formula of alkanes which are saturated hydrocarbons to find any member of the series.

Answer:

C

Explanation:

It is c because that goes into heating and cooling and if nobody is home you should definetly turn off heating and cooling. This should be the correct answer.

Answer: The law of conservation of mass is reffering to the fact that energy cannot be created or destroyed. So when you speak about atoms not being created or destroyed it is the same thing. Unless you're talking about an atomic bomb where the atoms are split.

In a chemical reaction, the total mass present is equal to the mass of all the atoms undergoing the reaction.

According to the law of conservation of mass, mass is neither created nor destroyed but can be converted from one form to another. In a chemical reaction, atoms are rearranged. However, the total number of atoms in the system remains constant.

So, the total mass present in the system is equal to the mass of all the atoms undergoing the reaction. Since atoms are only rearranged, no new atom is formed and no atom disappears in the reaction, the total mass of the system remains constant.

For this reason, the statement;  “In a chemical reaction, atoms are neither created nor destroyed, only rearranged" is a statement of the law of conservation of mass.

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Answer: 3510 J

Explanation:

q = m x Cs x delta T

m = 28.0 g

Cs = 4.18 J/g x ⁰C

delta T = Final temperature - Initial temperature = 60.0⁰C - 30.0⁰C = 30.0⁰C

q = m x Cs x delta T

q = 28.0 g x (4.18 J/g x ⁰C) x 30.0⁰C = 3511.2 J

3510 J for the correct number of significant figures.

Grams and ⁰C cancel and you are left with Joules.

Answer:

a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.

Hope this helped!!!

Answer:

Empirical formulas show the simplest whole-number ratio of atoms in a compound

Explanation:

The correct answer for balanced reaction is : Cr = 1, Cl2 = 3

To balance the redox reaction in basic solution, we need to ensure that the number of electrons gained and lost are equal and that the charges are balanced. Here is the balanced equation:

Cr(s) + 3Cl2(g) + 6OH-(aq) → Cr(OH)3(s) + 6Cl-(aq)

In this balanced equation, the coefficients in front of Cr and Cl2 are:

Cr = 1, Cl2 = 3

The balanced equation shows that 1 mole of Cr reacts with 3 moles of Cl2 to form 1 mole of Cr(OH)3 and 6 moles of Cl-. The coefficients are chosen to balance the charges and the number of atoms on both sides of the equation.

Therefore, the correct answer is:

Cr = 1, Cl2 = 3

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Answer:

Chemical Change

Explanation:

The diagram that show the correct electron configuration is the second option. ⬆⬇1s,  ⬆⬇2s, ⬆⬆⬆2p.

The electronic configuration is the representation of electron present indifferent energy levels is an atom. The different type of orbitals are s, p, d, and f.

Thus, the correct option is 2, ⬆⬇1s,  ⬆⬇2s, ⬆⬆⬆2p.

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Oxidization is the process of losing electrons. As iron is oxidized, it loses electrons from valence shell instead of highest energy shell because 4s orbital lies in the fourth shell, and 3d in the third shell and the 4s electrons being shielded from the nucleus by the inner 3d orbitals.

The topmost shell has the utmost energy. So, the valence shell has the highest energy.

Energy is in the form of potential energy to allow the electrons to bind to the nucleus.

4s orbital lies in the fourth shell, and 3d in the third shell and the 4s electrons being shielded from the nucleus by the inner 3d orbitals.

Thus, iron is oxidized, it loses electrons from valence shell instead of highest energy shell.

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The comparison of the formulas for nitrogen monoxide and nitrogen dioxide is: The formula for nitrogen monoxide (NO) is NO and the formula for nitrogen dioxide (NO2) is NO2.

Nitrogen monoxide (NO) and nitrogen dioxide (NO2) are both compounds made up of nitrogen and oxygen.

The difference between the two lies in the number of oxygen atoms present in each molecule.

NO contains one oxygen atom, while NO2 contains two oxygen atoms. NO is commonly known as nitric oxide and is a colorless and odorless gas that acts as a signaling molecule in the body.

NO2, on the other hand, is a reddish-brown gas that has a sharp, pungent odor and is a toxic air pollutant.

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The balanced equation for the beta emission decay of iodine-126 is as follows:

Decay process in nuclear reactions refers to the spontaneous transformation of an unstable nucleus into a more stable one, emitting one or more particles or radiation in the process.

The types of decay include

This process results in a decrease in the total number of protons and neutrons in the nucleus and a decrease in the total atomic number and mass number of the nucleus.

In the equation, the beta particle is an electron emitted from the nucleus during the decay process.

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Eight tetrahedral sites are labeled with Fe³⁺ ions and four octahedral sites are labeled with Co²⁺ ions.

To represent the inverse spinel structure of CoFe₂O₄ in a unit cell, we need to label the ions based on their positions in the crystal structure.

In the inverse spinel structure, one-half of the octahedral sites are occupied by divalent metal ions, while one-half of the tetrahedral sites and the remaining octahedral sites are occupied by trivalent metal ions. The chemical formula of CoFe₂O₄ suggests that the cobalt (Co) ions occupy one-half of the octahedral sites, while the iron (Fe) ions occupy both the tetrahedral and the remaining half of the octahedral sites.

Therefore, we can label the ions in the unit cell of CoFe₂O₄ as follows:

Eight tetrahedral sites are labeled with Fe³⁺ ions.

Four octahedral sites are labeled with Co²⁺ ions.

Four octahedral sites are labeled with Fe³⁺ ions.

The unit cell of CoFe₂O₄ can be represented by the following diagram, where the small spheres represent Co²⁺ ions, and the large spheres represent Fe³⁺ ions:

Note that this is a simplified representation of the unit cell, as it only shows one layer of ions. In reality, the structure of CoFe₂O₄ is three-dimensional, and the unit cell contains many more ions.

The correct question is :
Label the ions so that the unit cell represents the structure of an inverse spinel, CoFe₂O₄. (Picture below)

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Enthalpy change of mixing refers to the energy change during the formation of an ideal solution. Volume change of mixing relates to the change in volume resulting from the mixing process.

Enthalpy is a thermodynamic property that represents the total heat content of a system at constant pressure. It encompasses both the internal energy of the system and the work done by or on the system. Enthalpy is denoted by the symbol "H" and is typically measured in units of energy, such as joules (J) or calories (cal). Enthalpy accounts for the energy transferred as heat during chemical reactions or phase changes. Enthalpy is crucial in studying and analyzing various phenomena, including chemical reactions, phase transitions, and energy transfers in thermodynamic systems.

Volume change of mixing, on the other hand, relates to the change in volume resulting from the mixing process. It accounts for the variation in molecular interactions and the resulting effects on the overall volume of the mixture compared to the volumes of the individual components.

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Answer:

Yes, water molecules remain the same despite the phase

Explanation:

When water is in the form of ice, it molecules remain the same only the distance between the molecule. This distance is higher than that of the inter molecular distance between liquid water molecules. Due to this reason ice is lighter than water.  

Now in gaseous phase, the intermolecular distance increases thereby making it lighter than solid ice and liquid water.

The melting of 1 mole of NaCl(s) is spontaneous at 500°C but not at 700°C.

To determine the spontaneity of the melting process at each temperature, we need to calculate the change in Gibbs free energy (ΔG) using the equation:

ΔG = ΔH - TΔS

S°NaCl(s) = 72.11 J/mol K

S°NaCl(l) = 95.06 J/mol K

ΔH°fusion = 27.95 kJ/mol

At 500°C (773 K):

ΔS = S°NaCl(l) - S°NaCl(s) = 95.06 J/mol K - 72.11 J/mol K = 22.95 J/mol K

ΔG = ΔH°fusion - TΔS = 27.95 kJ/mol - (773 K)(22.95 J/mol K) = 27.95 kJ/mol - 17.78 kJ/mol = 10.17 kJ/mol

Since ΔG is positive (10.17 kJ/mol > 0), the melting of NaCl(s) is non-spontaneous at 500°C.

At 700°C (973 K):

ΔS = S°NaCl(l) - S°NaCl(s) = 95.06 J/mol K - 72.11 J/mol K = 22.95 J/mol K

ΔG = ΔH°fusion - TΔS = 27.95 kJ/mol - (973 K)(22.95 J/mol K) = 27.95 kJ/mol - 22.33 kJ/mol = 5.62 kJ/mol

Since ΔG is still positive (5.62 kJ/mol > 0), the melting of NaCl(s) is also non-spontaneous at 700°C.

Therefore, the melting of 1 mole of NaCl(s) is spontaneous at 500°C but not at 700°C. The positive values of ΔG indicate that the process is non-spontaneous at both temperatures, meaning that energy input would be required for the solid NaCl to melt.

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Answer:a

Explanation:

the nurse will administer approximately 1 teaspoon (tsp) of the medication.1 teaspoon (tsp) is approximately equal to 5 mL.

To determine the number of teaspoons the nurse should administer, we need to calculate the equivalent volume of 30 mEq of KCL using the provided concentration of 60 mEq/10 mL.

First, we'll find the ratio of milliequivalents (mEq) to milliliters (mL) in the given concentration:

60 mEq / 10 mL = 6 mEq/mL

Next, we can set up a proportion to find the volume (in mL) that corresponds to 30 mEq:

6 mEq/mL = 30 mEq / X mL

To solve for X, we can cross-multiply:

6X = 30 * 1

6X = 30

X = 30 / 6

X = 5 mL

Since the medication cup is marked in teaspoons, we need to convert 5 mL to teaspoons.

1 teaspoon (tsp) is approximately equal to 5 mL.

Therefore, the nurse will administer approximately 1 teaspoon (tsp) of the medication.

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Answer:

bro thats plagiarism

Explanation:

Answer:

The correct answer would be - D. What causes cancer cells to grow uncontrollably?

Explanation:

A Biologist is a person that studies living organisms and the study of living organisms and their process called biology. Biology is a very vast field that involves many branches such as zoology, botany, biochemistry, immunology, biophysics, anatomy, ecology and many more.

So, given all are can be an example of the study biology wanted to do, however, the question most likely studied by a biologist would be What causes cancer cells to grow uncontrollably as it deals with an organism and their biological process.

The melting of solid wax to form liquid wax and the evaporation of liquid wax to form wax vapor are physical changes. The burning of the wax vapor is a chemical change.

Answer:

Around 150 million years ago

Explanation:

The Atlantic ocean was formed during the Jurassic period

Answer:

200 millon years ago

Explanation: please give me brainliest

Answer:

Potassium Bromide

Explanation:

not sure but i think thats it

The flatworm and sea slug's comparable coloring and markings imply that both have evolved to have some type of warning coloration, often known as aposematism.

This indicates that they have evolved to use vivid or striking colors or patterns to alert potential predators to their toxicity.

In this instance, mimicking the deadly sea slug's coloring has probably evolved in flatworms as a type of defensive adaptation.

The flatworms may be able to fool predators into believing they are similarly toxic by resembling toxic sea slugs, which could reduce their risk of being attacked or eaten.

Natural selection would eventually favor people who had this protective adaption, resulting in a bigger population of flatworms with comparable color and other characteristics.

Consequently, the most likely explanation for the enormous population of flatworms with comparable coloring and patterns is that, via the process of natural selection, they have developed to resemble the coloring of the toxic sea slug as a type of protective adaptation.

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