an aluminum atom has a mass of and a small airplane has a mass of . use this information to answer the questions below. be sure your answers have the correct number of significant digits. what is the mass of 1 mole of aluminum atoms? round your answer to 3 significant digits. how many moles of aluminum atoms have a mass equal to the mass of a small airplane? round your answer to 3 significant digits.

C. If  blood pressure decreases, filtration in the kidneys decreases.

D. If more blood returns to the heart, the ventricles contract more forcefully to pump it out, and this raises blood pressure.

The maintenance of blood pressure is defined as the high use of sodium in your diet and the low use of potassium in your diet can cause hypertension. It is also important to use those foods which are free from fats. It is also important that we should use fruits, vegetables, and grains in excessive amounts for the maintenance of blood pressure and for a healthy diet.

High blood pressure 190/110 mm Hg can cause the main vital organs of the body like the brain, heart, and kidney too. There are three factors that contribute to blood pressure which are resistance, blood viscosity, and blood vessel diameter.

So we can conclude that blood pressure is the pressure of circulating blood against the walls of the blood vessels.

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Which of the following statements are true of the maintenance

of blood pressure (BP)? (Read carefully and select all of the correct statements.)

A. Norepinephrine stimulates vasoconstriction in skin, viscera, and skeletal muscles, all of which lower BP.

B. Aldosterone stimulates the reabsorption of Na+ ions by the kidneys, which lowers BP.

C. If BP decreases, filtration in the kidneys decreases.

D. If more blood returns to the heart, the ventricles contract more forcefully to pump it out, and this raises BP.

E. If BP decreases, the kidneys secrete the enzyme renin, which stimulates the secretion of epinephrine to prevent a further decrease.

F. The hormone ANP increases the excretion of K+ ions by the kidneys, which helps conserve water and raise BP.

G. The hormone ADH helps the kidneys conserve water and helps prevent a decrease in BP.

H. The elasticity of the large arteries helps decrease diastolic BP.

Answer:

Use A Nuclear Condenser Add It With A Nuclear Transfer Pipe Conecting With a Tessoract And There You Go!

Explanation:

Answer:

Annie Jump Cannon entered Wellesley College in Massachusetts in 1880 to study astronomy. She became interested in stellar spectroscopy, the process of breaking light from stars down into its component colors so the various elements can be identified. After suffering from scarlet fever, which left her hearing impaired, she earned her master�s degree and then continued her studies at Radcliffe College. She became an assistant at the Harvard College Observatory, the first observatory to include women as staff members. During her career, she observed, classified, and analyzed the spectra of some five hundred thousand stars, assigning each one its place in the sequence O, B, A, F, G, K, and M. In 1911 she almost became a faculty member at Harvard but the university officials refused to promote a woman to such high status. So she became the curator of astronomical photographs, earning a salary of twelve hundred dollars a year. Finally, in 1936, Harvard hired her as a permanent faculty member. She was seventy-three years old at the time.

Annie Jump Cannon entered Wellesley College in Massachusetts in 1880 to study astronomy. She became interested in stellar spectroscopy, the process of breaking light from stars down into its component colors so the various elements can be identified. After suffering from scarlet fever, which left her hearing impaired, she earned her master�s degree and then continued her studies at Radcliffe College. She became an assistant at the Harvard College Observatory, the first observatory to include women as staff members. During her career, she observed, classified, and analyzed the spectra of some five hundred thousand stars, assigning each one its place in the sequence O, B, A, F, G, K, and M. In 1911 she almost became a faculty member at Harvard but the university officials refused to promote a woman to such high status. So she became the curator of astronomical photographs, earning a salary of twelve hundred dollars a year. Finally, in 1936, Harvard hired her as a permanent faculty member. She was seventy-three years old at the time.Astronomers now realize that everything which appears to distinguish one star from another - temperature, luminosity, size, life span -- is determined almost entirely by one factor: the star's mass. The main sequence along the HR diagram is not a singular evolutionary path, as many had thought, but a portrait of the sky at one moment in time of stars with varying masses.

Annie Jump Cannon entered Wellesley College in Massachusetts in 1880 to study astronomy. She became interested in stellar spectroscopy, the process of breaking light from stars down into its component colors so the various elements can be identified. After suffering from scarlet fever, which left her hearing impaired, she earned her master�s degree and then continued her studies at Radcliffe College. She became an assistant at the Harvard College Observatory, the first observatory to include women as staff members. During her career, she observed, classified, and analyzed the spectra of some five hundred thousand stars, assigning each one its place in the sequence O, B, A, F, G, K, and M. In 1911 she almost became a faculty member at Harvard but the university officials refused to promote a woman to such high status. So she became the curator of astronomical photographs, earning a salary of twelve hundred dollars a year. Finally, in 1936, Harvard hired her as a permanent faculty member. She was seventy-three years old at the time.Astronomers now realize that everything which appears to distinguish one star from another - temperature, luminosity, size, life span -- is determined almost entirely by one factor: the star's mass. The main sequence along the HR diagram is not a singular evolutionary path, as many had thought, but a portrait of the sky at one moment in time of stars with varying masses.Below is a version of the Hertzsprung-Russell diagram, which shows how the

Explanation:

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Answer:

It would take 21.8 mL of 1.75 M beryllium nitrate solution to produce 5.4 g of aluminum nitrate

Explanation:

Using the balanced chemical equation and the molar mass of aluminum nitrate provided, we can calculate the amount of aluminum nitrate produced from the given mass:

1 mole of aluminum nitrate (Al(NO3)3) has a mass of 213.01 g.

So, 5.4 g of Al(NO3)3 is equivalent to (5.4 g) / (213.01 g/mol) = 0.0254 mol.

From the balanced chemical equation, we can see that 3 moles of beryllium nitrate (Be(NO3)2) produce 2 moles of aluminum nitrate. So, the amount of beryllium nitrate needed to produce 0.0254 mol of aluminum nitrate is:

(0.0254 mol Al(NO3)3) x (3 mol Be(NO3)2 / 2 mol Al(NO3)3) = 0.0381 mol Be(NO3)2

Now we can use the concentration and the amount of beryllium nitrate to calculate the volume of the solution required:

0.0381 mol of Be(NO3)2 is present in (0.0381 mol) / (1.75 mol/L) = 0.0218 L = 21.8 mL of 1.75 M beryllium nitrate solution.

Therefore, it would take 21.8 mL of 1.75 M beryllium nitrate solution to produce 5.4 g of aluminum nitrate, assuming the reaction proceeds to completion.

The correct answer is c. Iron. Red water problems are primarily caused by the presence of iron in the water, which can cause discoloration and an unpleasant taste and odor.

Iron Red water problems are primarily due to the presence of iron in the water. When iron is oxidized, it forms insoluble reddish-brown particles that can cause staining and other issues. Hardness refers to the concentration of dissolved minerals like calcium and magnesium in water, while turbidity refers to the cloudiness or haziness of water caused by suspended particles. Hydrogen sulfide is a gas that can cause a rotten egg odor in water.

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The given unbalanced reaction, Fe + HCl → FeCl\(_{3}\) + H\(^{2}\), can be classified as a single replacement reaction. Option A.

This is because the iron (Fe) is replacing the hydrogen (H) in hydrochloric acid (HCl) to form iron (III) chloride (FeCl\(_{3}\)) and hydrogen gas (H\(^{2}\)). In a single replacement reaction, one element replaces another in a compound. In this case, Fe replaces H in HCl to form FeCl\(_{3}\) and H\(^{2}\). The other reaction types are not applicable to this reaction.

A combination reaction involves two or more reactants combining to form a single product. A double replacement reaction involves two compounds exchanging ions to form two new compounds. A combustion reaction involves the reaction of a fuel with oxygen to produce carbon dioxide and water. A decomposition reaction involves a single reactant breaking down into two or more simpler products. Therefore, the classification for this unbalanced reaction is single replacement. Option A.

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Answer:

Show us the arrows, how are we suppose to answer?

Explanation:

The amount of radioactive kind of ruthenium left after 16 hours is 44717.37 grams.

Natural radioactive processes are characterized by a half-life, the time it takes for half of the material to decay radioactively. The amount of material left over after a certain number of half-lives can be easily calculated.

The amount of radioactive element present follows the exponential function,

\(N(t) = N(0)e^{-kt}\)

N(0) is the initial amount at t = 0, so N(0) = 721,248 g

To find k, use the fact that after 4 hours, N drops by half (definition of half-life):

k = \(\dfrac{0.693}{t_{1/2}}\)

Using the value 4 hours for half life,

k = 0.1732 per hour

Using t = 16 hours, finding N(t),

\(N(t) = 721,248 \times e^{-0.1732 \times 16}\)

\(N(t) = 721,248 \times e^{-2.7712}\)

\(N(t) = 44717.37\) g.

The amount of ruthenium left after 16 hours is 44717.37 grams.

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Answer:

Cholesterol is a waxy substance found in your blood. Your body needs cholesterol to build healthy cells, but high levels of cholesterol can increase your risk of heart disease. With high cholesterol, you can develop fatty deposits in your blood vessels.

Explanation:

Answer:

Cholesterol is a waxy substance found in your blood. It can affect our bodies in many ways. If you have high levels of cholesterol it can increase your risk of heart disease. Your body needs it to help build healthy cells.

Explanation:

Hope this helps:)...if not then sorry for wasting your time and may God bless you:)

Answer:

3.2.4.5.1

Explanation:

The four territories that provide the "bottomless reserve of cheap labor"  were China, India, southeast Asia and parts of Africa. The irony of the exploited labor is that despite being the backbone of the global economy and contributing to the wealth of developed countries.

The four territories that provide the "bottomless reserve of cheap labor" referred to in 187 are likely to be countries or regions in the developing world with large populations and low wages, such as China, India, Southeast Asia, and parts of Africa.

These territories are often exploited by multinational corporations seeking to maximize profits by outsourcing production to these regions where labor is cheap and often unprotected by strong labor laws or unions.

The irony of the exploited labor is that despite being the backbone of the global economy and contributing to the wealth of developed countries, the workers in these regions often live in poverty and face harsh working conditions. They are paid low wages, subjected to long hours, and lack basic benefits such as health insurance and job security. The irony lies in the fact that the workers who are contributing to the wealth and prosperity of others are often themselves unable to enjoy a decent standard of living.

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Angiotensin -I (A-I) is a peptide hormone that is produced from the proteolytic action of renin on angiotensinogen. In order for A-I to become its active form, angiotensin -II (A-II), it must be subjected to the action of an enzyme known as angiotensin -converting enzyme (ACE).

Correct option is A.

ACE is a dipeptidyl carboxypeptidase that cleaves the terminal dipeptide from A-I, leaving the active form of A-II. This process is important because A-II is a potent vasoconstrictor that also stimulates aldosterone secretion from the adrenal cortex.

Aldosterone helps to regulate sodium and water balance in the body, and thus A-II plays a key role in maintaining normal blood pressure and fluid balance in the body. Therefore, ACE is necessary for the transformation of A-I into A-II, and without it the body would be unable to produce the active form of the hormone.

Correct option is A.

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solids Highest density definite shape and colour

liquids Indefinite shape and defining volumes particles glide past each other

Gases Indefinite shape Indefinite volume lowest density

Explanation:

this is due to the nature of its molecules

Answer: C something that improves an organisms ability to survive

Answer:

C.

Explanation:

Answer:

Single celled organism

Explanation:

They fall under two categories:

Eukaryotes and prokaryotes.

Eukaryotes: Evolved from prokaryotes, they are larger and more complex. Unlike prokaryotes, they have a nucleus. Can be single celled or multicellular.

Prokaryotes: Oldest cell type, small and simple. They do not have a nucleus. Open unit with no compartments.

The given electronic configuration corresponds to the element Tungsten (W) with atomic number 74.

The identification can be done using two methods: 1) Recognizing the electron configuration pattern and comparing it with the periodic table, and 2) Analyzing the filling order of atomic orbitals. The electronic configurations for the ions Se^2-, Cd^2+, Ni^2+, Sr^2+, Cr^3+, and Tl^+ are: Se^2- - [Kr] 4d^10 5s^2 5p^6, Cd^2+ - [Kr] 4d^10, Ni^2+ - [Ar] 3d^8, Sr^2+ - [Kr] 5s^2, Cr^3+ - [Ar] 3d^3, and Tl^+ - [Xe] 4f^14 5d^10 6s^2 6p^1.

The orbital diagrams for Fe, Fe^2+, and Fe^3+ show the arrangement of electrons in different orbitals. Fe and Fe^2+ are paramagnetic, while Fe^3+ is diamagnetic. K, Se^2-, Mg, Cd^2+, Kr, Ni^2+, Sr^2+, Cr^3+, and Tl^+ are paramagnetic, while Fe^2+ is diamagnetic.

To identify the element, we can recognize the pattern of the electron configuration and compare it with the periodic table. The given configuration follows the filling order of atomic orbitals up to the 7p orbital, indicating the element is Tungsten (W) with atomic number 74.

To determine the electronic configurations of ions, we need to remove or add electrons based on the ion's charge. For Se^2-, two electrons are added to the 4s and 4p orbitals. Cd^2+ loses two electrons from the 5s orbital. Ni^2+ loses two electrons from the 3d orbital. Sr^2+ loses two electrons from the 5s orbital. Cr^3+ loses three electrons from the 3d orbital. Tl^+ loses one electron from the 6s orbital.

Orbital diagrams represent the arrangement of electrons in different orbitals. Fe has five unpaired electrons, Fe^2+ has four unpaired electrons, and Fe^3+ has three unpaired electrons. Based on the presence of unpaired electrons, Fe and Fe^2+ are paramagnetic, while Fe^3+ is diamagnetic.

For the species listed, K has one unpaired electron and is paramagnetic. Se^2- has no unpaired electrons and is diamagnetic. Mg has no unpaired electrons and is diamagnetic. Cd^2+ has no unpaired electrons and is diamagnetic. Kr has no unpaired electrons and is diamagnetic. Ni^2+ has two unpaired electrons and is paramagnetic. Sr^2+ has no unpaired electrons and is diamagnetic. Cr^3+ has three unpaired electrons and is paramagnetic. Tl^+ has one unpaired electron and is paramagnetic.

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Answer:

20 degrees

Explanation:

Applying the second law of reflection,

Second Law of reflection: The law of refelection states that the incident angle, reflected angle.

Mathematically, it can be expressed as

i = r...................... Equation 1

From the question, we were told that the light strik the plane at an angle of 20 degrees to the normal.

Therefore,

i = 20 degrees.

If i = 20 degrees,

then,

r = 20 degrees.

Answer:

If it loses an electron it becomes a positive ion. Picture 1.8 Some atoms lose electrons and become positive ions. A lithium atom has 3 protons and 3 electrons. It can lose one of its electrons, making it an ion

Explanation:

Answer:

1.72 g/ml

Explanation:

If our aim is to determine the density of the metal ore, then;

Mass of the metal ore= 9.00 g

Volume of the ore= volume of water displaced = 26.47 - 21.25 = 5.22 ml

Density of the ore= 9.00 g/5.22 mk

Density of the ore= 1.72 g/ml

The dark moths were better hidden from predators and therefore more of them survived and this allowed them to have offspring.

Answer:

The dark moths were better hidden from predators and therefore more of them survived and this allowed them to have offspring.

Explanation:

If all of the light colored trees disappeared and there are only dark colored ones, then that means that the light colored moths wouldn't be able to live long since their traits wouldn't match the environment. This then leads to the conclusion that dark moths would be better hidden since their trait fits their current environment and would let them be hid much better from predators. This would allow them to survive longer and eventually, reproduce.

Answer: C.

Explanation:

Voluntary muscle are muscles that you can control.

The chemical formula for iron(III) hydroxide, a basic compound, is Fe(OH)₃.

In this formula, the symbol Fe represents iron, and (OH)₃ denotes three hydroxide ions.

Iron exhibits a +3 charge, while hydroxide carries a -1 charge.

By combining three hydroxide ions with one iron(III) ion, the charges balance out, resulting in Fe(OH)₃.

This compound is commonly known as iron(III) hydroxide and is often found as a brownish solid.

It is utilized in various applications, including wastewater treatment, as a precursor for other iron compounds, and in medicinal formulations as an iron supplement.

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The number of possible Microstates there are for 6 molecules to fit in 6 boxes, when 4 molecules are pointing right and 2 molecules are pointing left are; 15 Microstates

This is very much similar to combination problems in mathematics.

Hence, the number of ways to arrange all six molecules according to the given description is;

Hence, we have; (6×5)×4!/(2!) ×4!

Therefore, we have; 30/2×1

Hence, the number of possible Microstates is; 15 Microstates

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Answer:

HCl is a polar covalent compound, because of electronegativity difference between Cl(3.5) and hydrogen (2). Hence in this way, the bond between HCl breaks and they formed ions in the polar solvent like water .

Answer:

Pure elements:

Hydrogen(H)

Nitrogen(N)

Magnesium (Mg)

Pure Compounds:

Oxygen gas(O2)  

Water (H2O)  

Ammonia (NH3)

Explanation:

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Answer:

Hydrogen gas combines with nitrogen to form Ammonia.

Answer: car b

Explanation: