6. 7. A hyperbaric chamber has a volume of 200. L. (a) How many moles of oxygen are needed to fill the chamber at room temperature (23°C) and 3.00 atm pressure? b) How many grams of oxygen are needed? (Hint: Since moles have been asked, which equation has the moles listed in the equation. Use that to solve this problem. Also don’t forget to use the equation 1 mole = Formula weight or Molecular weight to calculate the grams of O2).

The answer responses to  the structures shown in the diagram are:

A. chromosomes

C. They would be the same.

B. They are in pairs because each one comes from a different parent.

The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.

The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.

Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.

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Identify the structures shown.

A. chromosomes

B. mitochondria

C. nuclei

D. vacuoles

C

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Explain why the structures are in pairs.

A. They aren't in pairs.

B. They are in pairs because each one comes from a different parent.

C. This cell is making a copy of itself.

D. The cell always has 2 copies in case 1 is damaged.

Answer:

Explanation:

If a zero is found between significant digits, it is significant

The United States experienced a decrease in the real GDP, high inflation, and arising unemployment rate.

The United States appeared to be entering a recession.A recession is a decline in economic activity, characterized by declining GDP, high unemployment rates, and increased unemployment benefits. Economic analysts and the media commonly use a two-quarter consecutive decline in real GDP as a definition of a recession.

The United States is considered to have entered a recession in the 1970s, which was characterized by an energy crisis, inflation, and recession. However, by the end of the decade, the economy had improved, and it entered into the 1980s with a strong economic performance.

The 1970s were a period of high inflation, low growth, and an oil crisis, which had a significant impact on the United States economy. Therefore, it can be concluded that The United States was in the middle of an economic boom before the 1970s recession and entered a recession in the 1970s due to a decrease in the real GDP, high inflation, and arising unemployment rate.

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The presence of large bodies of water helps to stabilize temperature changes in coastal areas.

Water has a high specific heat capacity due to the presence of hydrogen bonding between its molecules. Hydrogen bonding occurs when the positively charged hydrogen atom of one water molecule is attracted to the negatively charged oxygen atom of another water molecule. This bonding is stronger than the typical intermolecular forces found in other substances.

Hydrogen bonding in water requires a significant amount of energy to break, which leads to the high specific heat capacity of water. This means that water can absorb and store a substantial amount of heat energy without a significant increase in temperature. Conversely, when water loses heat, it releases a significant amount of energy before its temperature decreases.

In coastal areas and regions near large bodies of water, the high specific heat capacity of water plays a crucial role in moderating climates. Water acts as a heat sink, absorbing heat during the day and releasing it at night. This leads to milder temperature fluctuations compared to inland areas, which have lower specific heat capacities. As a result, coastal regions experience cooler summers and warmer winters, providing a more moderate climate overall.

The presence of large bodies of water helps to stabilize temperature changes in coastal areas, providing a buffering effect and contributing to the moderation of the climate.

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The metal X has an approximate molar mass of 42.36 g/mol and the metal is most likely calcium.

The molar mass of the metal carbonate XCO₃ and identify the metal X, we need to calculate the number of moles of XCO₃ and CO₂ using the given masses and molar masses.

The molar mass of CO₂ (carbon dioxide) is 12.011 g/mol (for carbon) + 2 * 15.999 g/mol (for oxygen) = 44.01 g/mol.

The number of moles of CO₂ can be calculated using the formula:

moles of CO₂ = mass of CO₂ / molar mass of CO₂

moles of CO₂ = 0.855 g / 44.01 g/mol

moles of CO₂ ≈ 0.01944 mol

Since the reaction stoichiometry is 1:1 between XCO₃ and CO₂, the number of moles of XCO₃ is also approximately 0.01944 mol.

molar mass of XCO₃ = mass of XCO₃ / moles of XCO₃

molar mass of XCO₃ = 2.012 g / 0.01944 mol

molar mass of XCO₃ ≈ 103.38 g/mol

The molar mass of XCO₃ is approximately 103.38 g/mol.

To determine the metal X:

molar mass of X = molar mass of XCO3 - molar mass of CO3

molar mass of X = 103.38 g/mol - (12.011 g/mol + 3 * 15.999 g/mol)

molar mass of X ≈ 42.36 g/mol

Metal X is most likely Calcium that has a molar mass of 40 g/mol

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Answer:

  0.0480 M

Explanation:

The reaction is ...

  H₂SO₄ + 2NaOH ⇒ Na₂SO₄ +2H₂O

That is, 2 moles of NaOH react with each mole of H₂SO₄. Then the molarity of the H₂SO₄ is ...

  moles/liter = (0.186 M/2)(12.9 mL)/(25.0 mL) ≈ 0.0480 M

Answer:

My experience in/with scienceI begin with what I believe science means to me. Science is the natural world around me&emdash;trees, animals, earth, air, people, flowers, birds, machinery, working tools. As a nurse science also means the body and how it is made and functions. How illness occurs and how we heal, how the mind thinks.

My experience with science began as a child. My father and mother both had scientific interests&emdash;gardening, astronomy, archery, fishing, outdoors, farming. I was a girl guide so camping, fires etc. were interesting to me.

Nursing started out as science&emdash;physiology and medications, surgery and healing. I grew older and began to realize that all these things I saw as science were actually connected to people and people were all unique and wonderful. The rules of science don't fit with people&emdash;because each person has a different relationship with the rules of science and often-mysterious things happen.

Health that started out as an experimental hard scientific definition has now become a word with meaning&emdash;different for each person. In my practice health is a central focus and I am wanting to learn how to facilitate health for the people that I come into contact with. I have learned that what I do to people to facilitate their health and wellness contributes minimally towards their capacity of health&emdash;but what I do with people has more potential to support their being healthy or their perceiving health.

I see science now from this broader perspective and look forward to working and learning in my personal and professional life in this manner. Science defined in this way opens many more doors to understanding people and the world that we live in. I think that this meaning of science also assists me to grow as a person in my view of the world I live in.

Solution :

\(pk_b = -log ( K_b)\\\\pk_b = - log ( 3.6 \times 10^{-5})\\\\pk_b = 4.44\)

We know, pH of this solution :

\(pH = pK_a + log ( \dfrac{|conjugate\ base|}{|weak \ acid|}\\\\pH = 4.44 + log(\dfrac{0.480}{0.190})\\\\pH = 4.44 + 0.40\\\\pH =4.84\)

Hence, this is the required solution.

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.

The neutralization reaction between hydrobromic acid and sodium hydroxide is HBr + NaOH → NaBr + H2O.

The neutralization reaction is a chemical reaction between acid and base. The product from the reaction is salt and water. The salt formed comes from anions from bases and cations from acids

The ionization for hydrobromic acid HBr → H⁺ + Br⁻

The ionization for sodium hydroxide NaOH → Na⁺ + OH⁻

The neutralization reaction  HBr + NaOH → NaBr + H₂O

The reaction is already in balanced.

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Answer:

Ketone

Explanation:

i know it for sure, but i also checked it on the internet

Tables are more suitable than a graph to show data because they present data in as close to raw form as possible.

Data can be represented in Tables, charts and graphs. These data representation are used for two broad purposes.

Unlike the case of graphs that use abstraction to focus on trends and numerical relationships, tables present data in as close to raw form as possible.

Tables are usually meant to be read, so they are ideal when the data that is present are those type of data that cannot easily be presented visually, or when the data requires more specific attention.

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21.3°C is equivalent to 294.45 K (to 2 decimal places).

To convert Celsius to Kelvin, we add 273.15 to the Celsius temperature.

So, 21.3°C + 273.15 = 294.45 K

21.3°C is equivalent to 294.45 K (to 2 decimal places).

A popular temperature scale used in many nations is the Celsius scale, also referred to as the centigrade scale. The freezing and boiling temperatures of water at normal atmospheric pressure are the foundation for it.

At standard atmospheric pressure, water has a freezing point of 0°C and a boiling temperature of 100°C on the Celsius scale. The Swedish astronomer Anders Celsius, who first suggested the Celsius scale in 1742, is honored by the scale's name.

The International System of Units uses the unit of measurement Kelvin to describe temperature. (SI). Its foundation is the thermodynamic temperature scale, which is established using a perfect gas's characteristics.

Absolute zero, or 0 K on the Kelvin scale, is the temperature at which all substance has no thermal energy. The Scottish physicist William Thomson, also known as Lord Kelvin, who first suggested the scale in 1848, is honored by having his name attached to the Kelvin scale.

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A beer that is 2.50% (vlv) alcohol has 6.25 mL of ethanol per glass (250.0 mL) of beer.

"Percent volume to volume" (vlv) is a way to express the concentration of a solution. It is defined as the volume of solute divided by the volume of the entire solution, multiplied by 100%.

In this case, we are given that a beer is 2.50% (vlv) alcohol. This means that the volume of ethanol in the beer is 2.50% of the total volume of the beer.

To calculate the amount of ethanol in a 250.0 mL glass of beer, we can use the following formula:

Volume of ethanol in mL = Percent vlv x Volume of solution in mL / 100

Plugging in the given values, we get:

Volume of ethanol in mL = 2.50 x 250.0 / 100 = 6.25 mL

Therefore, a beer that is 2.50% (vlv) alcohol has 6.25 mL of ethanol per glass (250.0 mL) of beer.

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The statement that describes the correct procedure when converting a number from scientific notation to standard notation if the power of 10 is -10 is to move the decimal point to the left (option A).

Scientific notation is a method of writing, or of displaying real numbers as a decimal number between 1 and 10 followed by an integer power of 10.

In mathematics, scientific notation is an alternative format of such a decimal number immediately followed by E and an integer.

For example, a number 0.00236 is written in scientific notation as 2.36×10−³ or as 2.36E-3.

This means that if the power of 10 of a number written in scientific notation is -10, then we can convert this number to standard notation by shifting the decimal point backwards.

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The balance the equation below in acidic medium are :

6Fe²⁺  +  2Cr₂O₇²⁻   +  14H⁺  ---->  6Fe³⁺  +  2Cr³⁺   +   7H₂O

1) The equation is given as :

Fe²⁺  +  Cr₂O₇²⁻   ----->   Fe³⁺  +  Cr³⁺

oxidation half : Fe²⁺  --->     Fe³⁺

reduction half : Cr₂O₇²⁻  --->  Cr³⁺

2) first balance the oxidation half :

Fe²⁺  --->     Fe³⁺ +  e⁻

this equation is balanced.

3) balanced reduction half :

Cr₂O₇²⁻  --->  2Cr³⁺

add seven H₂O molecule on the right side to balance the O atoms.

Cr₂O₇²⁻  --->  2Cr³⁺   +  7 H₂O

to balance 14 H atom add 14 H⁺ on the left side :

Cr₂O₇²⁻  +  14H⁺  --->  2Cr³⁺   +  7 H₂O

now, balance the charge :

Cr₂O₇²⁻  +  14H⁺  + 6e⁻ --->  2Cr³⁺   +  7 H₂O

6 electrons are gained by the reduction half , so multiply 6 in oxidation equation

6Fe²⁺  --->     6Fe³⁺ +  6e⁻

add both the equation we get :

6Fe²⁺  +  2Cr₂O₇²⁻   +  14H⁺ 6e⁻  ---->  6Fe³⁺  +  2Cr³⁺   +   7H₂O + 6e⁻

The final balanced equation is given as :

6Fe²⁺  +  2Cr₂O₇²⁻   +  14H⁺  ---->  6Fe³⁺  +  2Cr³⁺   +   7H₂O

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Answer:

See explanation

Explanation:

PO4{3-} is phosphate
Sulfite's formula is SO3{2-}
Sulfate is SO4{2-}
OH- is hydroxide
Note: {x±} signifies the charge of the entire molecule

The polyatomic ions in question are phosphite ion, sulfite ion, and sulfate ion.

The formula PO3−4 represents the polyatomic ion called phosphite ion. It is composed of one phosphorus atom bonded to three oxygen atoms. The name of the sulfite ion is SO3−2, and it consists of one sulfur atom bonded to three oxygen atoms. Lastly, the sulfate ion has the formula SO4−2, and it is composed of one sulfur atom bonded to four oxygen atoms.

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Answer:

the l sign means the substance in the chemical equation is a liquid. (hope this helped : D )

A). The statement is False.

B). The statement is True.

C). The statement is True.

D). The statement is False.

E). The statement is True.

F). The statement is False.

In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon.: 620  Hydrocarbons are examples of organization 14 hydrides. Hydrocarbons are normally colorless and hydrophobic; their smell is typically faint and may be much like that of gasoline or lighter fluid. They occur in a various variety of molecular structures and stages: they may be gases (such as methane and propane), liquids (including hexane and benzene), low melting solids (such as paraffin wax and naphthalene), or polymers (which include polyethylene and polystyrene).

within the fossil gas industries, hydrocarbon refers to evidently taking place petroleum, herbal gas, and coal, or their hydrocarbon derivatives and purified paperwork. The combustion of hydrocarbons is the principal source of the world's energy. Petroleum is the dominant raw-material source for natural commodity chemical compounds such as solvents and polymers. maximum anthropogenic (human-generated) emissions of greenhouse gases are both carbon dioxide released with the aid of the burning of fossil fuels, or methane launched from the coping with natural gas or from agriculture.

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Answer:

×

Explanation:

FALSE BECAUSE NOT OCEAN IT IS ALL

Answer: C

Explanation: hope this helps

The model of the solar system that is shown here is:

C. Geometric model

Model for description of earth and other entites

In astronomy, the geocentric model is a superseded description of the Universe with Earth at the center. Under the geocentric model, the Sun, Moon, stars, and planets all orbit Earth.

Characteristics:

Thus, option C is correct.

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Answer:

Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level.

Answer:

4.Ti

Explanation:

Because it is a group VIII element or an inert gas. or noble gas (Inert gas)

- It has 8 full valence electrons, making it a non-reactive gas.

Answer:

Not enough information to tell.

Explanation:

What is given?

Mass of Zn = 10.0 g,

Mass of HCl = 10.0 g,

Molar mass of Zn = 65.4 g/mol,

Molar mass of HCl = 36.4 g/mol,

Molar mass of ZnCl2 = 136.2 g/mol,

Molar mass of H2 = 2 g/mol.

Step-by-step solution:

First, let's convert 10.0 g of each reactant to moles using their respective molar mass:

Now, let's identify what is the limiting reactant. Let's see how many moles of ZnCl2 can be produced by 0.153 moles of Zn if 1 mol of Zn reacted produces 1 mol of ZnCl2, and how many moles of ZnCl2 can be produced by 0.275 moles of HCl if 2 moles of HCl reacted produces 1 mol of ZnCl2:

You can realize that the limiting reactant, in this case, is HCl because is the first reactant consumed first and this reactant 'impose' the limit to produce the products.

So now, let's find how many moles of H2 are being produced by 0.275 moles of HCl if 2 moles of HCl reacted produces 1 mol of H2:

The final step is to convert each number of moles of each product to grams using their respective molar mass, as follows:

We're producing 18.8 g of zinc chloride (ZnCl2), and 0.276 g of hydrogen (H2), so based on this logic the answer would be not enough information to tell.

Answer:

1 - Gravitational.

2 - Normal

3 - Tension

4 - Frictional

5 - Centripetal

Explanation:

1. If you drop something, gravity pulls it down to the Earth, So falling towards the earth is gravity.

2. Pushing back on another object is normal, Newton's law: Every action has an equal and opposite reaction.

3. When two forces are pulled on opposite sides, the object must stretch which creates tension. Think of a rubber band. If it is pulled more than the object can stretch, it will tear. Tensile strength refers to how much pulling force an object can withstand before it tears.

4. When objects or molecules rub against other objects or molecules they create friction.

5. Last two options go together.

Answer:

Calculate the frequency of light having wavelength of 456 nm.

1.22*10^8nm

Explanation:

In the given question, \(6.58 \times 10^{14}\) Hz is the frequency of the light with a wavelength of 456 nm.

Frequency is a measure of the number of cycles of a periodic wave that occur per unit of time.

The frequency of light can be calculated using the following equation:

frequency = speed of light / wavelength

where the speed of light is a constant equal to \(\rm 3 \times 10^8 \ m/s\).

To use this equation, we need to convert the wavelength from nanometers to meters:

456 nm = \(\rm 456 \times 10^{-9}\ m\)

Now, we can substitute the values into the equation:

frequency =  \(\rm 3 \times 10^8 \ m/s\) / \(\rm 456 \times 10^{-9}\ m\)

=  \(6.58 \times 10^{14}\) Hz

Therefore, the frequency of light with a wavelength of 456 nm is  \(6.58 \times 10^{14}\) Hz.

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Answer:

Following are the responses to the given question:

Explanation:

In many analyses, the homogenous sample with only a particular identity group is desired. Units were picked here depending on their similar characteristics so because research is specifically interested in these qualities. The downside of a homogeneous sample is nevertheless that the exterior validity of a study is decreased. In other words, any results obtained could be appropriately widespread to the general population. On either hand, a heterogeneous sample is capable of overcoming this difficulty, because its diversity is the typical pattern of any sort of sample distortion inside the broader population.

3.0 mL is the volume of the ruby. The volume of a container is commonly believed to be its capacity.

Volume is a three-dimensional spatial measurement. It is frequently mathematically quantified using SI-derived units or different imperial or The us customary units. Volume is connected to the notion of length (cubed).

The volume of a container is commonly believed to be its capacity; that is, the quantity of fluid (gas or liquid) that perhaps the container can hold, instead of the amount of space that the container occupies.

volume of water = 4.1 mL

volume of water + the volume of the ruby gemstone = 7.1 mL

volume of the ruby gemstone can be calculated as:

7.1 mL - 4.1 mL = 3.0 mL

Therefore, 3.0 mL is the volume of the ruby.

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