you have a patient currently receiving a dextrose constant rate infusion at 2.5% previously created in a 1000 ml 0.9% nacl bag. the doctor has requested to increase the concentration to 5% utilizing the same bag. there are approximately 400 milliliters of 0.9% nacl remaining in the bag. how many milliliters of 0.9% nacl/2.5% dextrose will you be removing from the bag and injecting of the 50% dextrose solution to achieve 5%?

Answer:

\(r_{He}=169.7m/s\)

Explanation:

Hello there!

In this case, since this problem can be understood via the Graham's law, which states that states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight, which can be extrapolated to the rate, we have:

\(\frac{r_{O_2}}{r_{He}} =\sqrt{\frac{M_{He}}{M_{O_2}} }\)

Thus, since the molar mass of helium is 4.0 g/mol and that of oxygen is 16.0 g/mol, we solve for the average velocity of helium as shown below:

\(r_{He}=r_{O_2}\sqrt{\frac{M_{He}}{M_{O_2}} }\\\\r_{He}=480m/s\sqrt{\frac{4.0g/mol}{32.0g/mol} }\\\\r_{He}=169.7m/s\)

Regards!

Answer: The amount of CO2 found in the atmosphere varies over the course of a year. Much of this variation happens because of the role of plants in the carbon cycle

The annual operation of the refrigerator produces 6835.5 g of sulfuric acid. This calculation is made assuming that the enthalpy of combustion for sulfur is equal to the enthalpy of combustion for carbon.

First, we are going to transform 655 kWh into kilojoules. Because 1 kWh = 3.6e6 J = 3600 kJ, that means that a typical frostless refrigerator uses 655 * 3600 kJ = 2358000 kJ of energy on a yearly basis.

The enthalpy of combustion for carbon (or enthalpy of carbon dioxide formation) is -393 kJ/mol. That means that we can calculate the number of moles of carbon needed to produce 2358000 kJ of energy.

2358000 kJ / 393 kJ/mol = 6000 mol of carbon

Because the molar mass of carbon is 12 g/mol we need

6000 mol * 12 g/mol = 72000 g of carbon

If 3.1% of this carbon is actually sulfur, then we will burn 0.031 * 72000 g = 2232 g of sulfur during one year. The molar mass of sulfur is 32 g/mol, which means we transformed 2232 g / 32 g/mol = 69.75 mol of sulfur into sulfur dioxide and further into sulfuric acid. Because 1 mol of sulfur is needed to produce 1 mol of sulfuric acid, we produced 69.75 moles of sulfuric acid.

The molar mass of sulfuric acid is 98 g/mol, so over the course of one year, we produced 69.75 mol * 98 g/mol = 6835.5 g of sulfuric acid.

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In one of the trials, the purpose of using water/soap solution was to compare the cleanliness of the hand with washing by water alone.

Hand washing is one of the simplest, most effective ways to avoid getting sick and prevent the spread of germs. Washing your hands with soap and water is still one of the most important steps you can take to avoid getting sick and to avoid spreading germs to others. The purpose of using water/soap solution for one of the trials was to compare the cleanliness of the hand with washing by water alone.The experiment involves two trials to investigate the effectiveness of soap and water in removing bacteria from hands. In one trial, the participant washed their hands with soap and water. While in the other trial, the participant washed their hands with water alone. After washing, their hands were pressed on a petri dish with culture medium to grow the bacteria. Then, the plates were placed in an incubator at 37°C for two days to grow bacteria. The soap and water solution are effective in removing bacteria from hands because the soap helps to lift dirt, grease, and microbes off skin and onto the surfaces of the lather, so that it can be rinsed away by water.

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Two atoms always represent the same element if they have the same number of protons because the amount of protons an atom has determines the element it represents.

a) The sphere emits thermal radiation at a rate of 139.75 Watts.

b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.

c) The sphere's net rate of energy exchange is 102.09 Watts.

To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.

a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:

Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))

Plugging in the given values:

Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)

Emitting Rate ≈ 139.75 Watts

b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:

Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))

Plugging in the given values:

Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)

Absorbing Rate ≈ 37.66 Watts

c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:

Net Rate = Emitting Rate - Absorbing Rate

Net Rate = 139.75 Watts - 37.66 Watts

Net Rate ≈ 102.09 Watts

Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.

Note: The units for all the rates are Watts.

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I think it is newtons but not that sure

Answer:

Gravity

Explanation:

I remembered from quizlet.

Answer:

Explanation:

Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.

The decomposition reaction can be represented by the general equation:

AB → A + B

Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.

There are different types of decomposition reactions, including:

Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):

CaCO3 → CaO + CO2

Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):

2H2O → 2H2 + O2

Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:

Cl2 → 2Cl

These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.

Answer:

Explanation:

reaction in which a compound breaks down into simpler substances or elements

Answer:

Question 1 can be answered by science. Scientists have conducted studies and research on the effects of heavy metals like lead and arsenic on human DNA. They have found that exposure to these metals can cause damage to DNA, leading to health problems and diseases.

Question 2 is a more complex question that cannot be answered solely by science. While science can provide information on the effects of heavy metals on ecosystems and human health, the decision of whether industries should be penalized for releasing heavy metals into the environment is a matter of policy and ethics. It involves weighing the economic benefits of the industry against the potential harm to the environment and human health. This decision requires input from multiple stakeholders, including scientists, policymakers, and members of the affected communities, and involves considerations beyond just scientific evidence.

Answer:

15 neutrons

Explanation:

the atomic mass shows the amount of neutrons and protons added together

the atomic number shows us how many protons they are (you can also find out how many electrons a element has by looking at its atomic number as it will have the same amount of protons)

so to find the amount of neutrons the sample has you have you subtract the atomic number which is the amount of protons from the mass number which tells us the amount of neutrons and protons added together but we only need the neutrons that's why we subtract it

33-18=15

The correct statements that illustrate how a deuterium isotope effect relates to an E2 reaction mechanism are:

A deuterium isotope effect refers to the difference in reaction rate observed when hydrogen atoms (H) are replaced by deuterium atoms (D) in a reaction. In E2 (elimination, bimolecular) reactions, the rate-determining step involves the simultaneous formation of a new pi bond and the breaking of a C-H or C-D bond.

The deuterium isotope effect arises due to the difference in the bonding strength between hydrogen and deuterium. If a deuterium isotope effect is observed, it indicates that the breaking of a C-H or C-D bond is involved in the rate-determining step. This suggests that the bond being broken contributes significantly to the overall reaction rate. Options 1 and 2 are correct.

Which of the following statements illustrate how a deuterium isotope effect relates to an e2 reaction mechanism? (Select all that apply.)

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Answer:

The value 9.8 m/s^2 is the average acceleration of a falling object due to the force of gravity on Earth. The letter g represents this value the formula v=gt. With this constant and formula, the speed of an object is calculated at the time t in seconds after it is dropped.

All objects fall at the same rate of speed due to gravity, regardless of their weight. If a small grain of sand and a bowling ball are dropped at the same time, both hit the floor at the same time. The value of g varies by one's location on the planet, ranging from 9.782 m/s^2 in the Panama Canal Zone to 9.832 m/s^2 at the Noth Pole

Explanation:

The common oxidation state of group VII elements (F, Cl, Br, I) in their compounds is typically -1.

The common oxidation state of Group VII elements (F, Cl, Br, I) in their compounds is -1, except when mixed with other halogens. This is due to their tendency to gain one electron to complete their outer electron shell, resulting in a stable configuration. When mixed with other halogens, they can display different oxidation states, such as +1, +3, +5, or +7, depending on the specific compound and the other elements present.

For example, the oxidation state of Cl in chlorine trifluoride (\(ClF_{3}\)) is +3, while the oxidation state of Cl in perchloric acid (\(HClO_{4}\)) is +7. Overall, the oxidation states of group VII elements can vary depending on the specific compound and its chemical properties.

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Answer:

48.059

Explanation:

Find on periodic table and add

32.06+15.99

Answer:

Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine times that of Earth. It only has one-eighth the average density of Earth; however, with its larger volume, Saturn is over 95 times more massive.

hope this helps

have a good day :)

Explanation:

Answer:

a) \(BaF_{2}\)

b) \(SnCl_{4}\)

c) \(Cr_{2}O_{3}\)

d) \(FeO\)

e) \(Li_{3} P\)

Explanation:

The charges of the ions have to be 0, so they balance.

a) \(Ba^{2+}\) has the charge of +2 and \(F^{-}\) has the charge of -1. So its \(0=(+2)+(-1)*2\). That means you need one \(Ba^{2+}\) and two \(F^{-}\) to balance the equation. -> \(BaF_{2}\)

b) \(Sn^{4+}\) has the charge of +4 and \(Cl^{-}\) has the charge of -1. So its \(0=(+4)+(-1)*4\). That means you need one \(Sn^{4+}\) and four \(Cl^{-}\) to balance the equation. -> \(SnCl_{4}\)

c) \(Cr^{3+}\) has the charge of +3 and \(O^{2-}\) has the charge of -2. So its \(0=(+3)*2+(-2)*3\). That means you need two \(Cr^{3+}\) and three \(O^{2-}\) to balance the equation. -> \(Cr_{2}O_{3}\)

d) \(Fe^{2+}\) has the charge of +2 and \(O^{2-}\)has the charge of -2. So its \(0=(+2)+(-2)\). That means you need one \(Fe^{2+}\) and one \(O^{2-}\) to balance the equation. -> \(FeO\)

e) \(Li^{+}\) has the charge of +1 and \(P^{3-}\)has the charge of -3. So its \(0=(+1)*3+(-3)\). That means you need three \(Li^{+}\) and one \(P^{3-}\) to balance the equation. -> \(Li_{3} P\)

Answer:

There will be 4 moles of NO2 produces at the end of the reaction.

Explanation:

First of all, you should consider that the limiting reactant is NO, since it's the first it's going to end in the reaction.

After that, the conversion factor must be done with the limiting reactant (NO). So since you have 4 mol of NO and the relation of NO with NO2 its 2:2, you will end up having 4 moles of NO2.

Answer:

2K + 2HI → 2KI + H2

Explanation:

A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.

Answer:

A food web is made up of all the food chains in a single ecosystem. Each living thing in an ecosystem belongs to many food chains. A food chain is a path that energy takes through a certain ecosystem. Trophic Levels. Organisms in food webs are grouped into categories called trophic levels.

Explanation:

I HOPE THIS HEPLS HAVE A WONDERFUL DAY!:)

Answer:

you didnt say if it was an animal or people food web so imma just try my best to explane tis is an animal food web. So it really is just showing was the animals eat and if they eat other animal basicly.

Explanation:

Answer:3.04

Explanation:Found answer online take my word for it.

a) The energy absorption associated with bands in an infrared spectrum is of lower energy than the lines appearing in a visible line spectrum because infrared light has a longer wavelength than visible light, meaning that the energy required for the absorption is lower. b) The type of energy transition occurring in a molecule that causes a band to appear in an infrared spectrum is a transition from one vibrational state to another. c) The type of energy transition occurring in an atom that causes a line to appear in a visible line spectrum is an electronic transition.

a) The energy absorption related to bands in an infrared spectrum is lower in energy than the lines appearing in a visible line spectrum. The energy absorption in infrared spectrum ranges from \(4000 cm^{-1} to 400 cm^{-1}\) . The visible spectrum of lines comes from the emission spectra of atoms, and each line corresponds to a particular energy level transition in an atom. The energy absorption related to bands in an infrared spectrum is lower in energy than the lines appearing in a visible line spectrum. The frequency of energy is higher when electromagnetic radiation has a shorter wavelength (or greater frequency). Electromagnetic radiation is characterized by frequency and wavelength, which are inversely proportional. Thus, radiation with a greater frequency has a shorter wavelength, whereas radiation with a lower frequency has a longer wavelength.

b) When a molecule absorbs energy, it undergoes an energy transition from one energy level to another. Infrared absorption spectroscopy measures the vibrations of molecular bonds, which correspond to the transitions between the vibrational energy levels of a molecule. Molecular vibrational energy is absorbed when infrared radiation is absorbed. When the energy absorbed is equal to the difference between the vibrational energy states of the molecule, an infrared band is observed.

c) Visible line spectra are produced when electrons transition from a higher energy level to a lower one, causing a photon of light to be emitted. When an atom absorbs energy, such as from a flame, a plasma arc, or an electrical discharge, its electrons can be promoted to higher energy levels. When the electrons relax back to the ground state, they emit energy in the form of electromagnetic radiation. The emitted light occurs in different regions of the visible spectrum, with each color corresponding to a specific energy level transition of the atom.

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Answer:

Ya'll should really practice more because things like these are easy

Explanation:

You guys need to practice more since stuff like this are pretty simple.

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Answer:

I think that would be true. The faster the wind, the longer it blows, or the farther it can blow uninterrupted, the bigger the waves. Therefore, a wave's size depends on wind speed, wind duration, and the area over which the wind is blowing

Answer: True.

Explanation: Yes, waves get energy from the wind through friction, so you see those waves get bigger each time. The longer the winds blows, the more friction, and energy it's getting, meaning better, and deadly waves. The wind can sometimes cause tsunamis if the its blowing too hard.

Three common naturally radioactive elements are uranium, thorium, and radium.

These elements undergo radioactive decay, emitting radiation in the form of alpha, beta, or gamma particles. Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles.

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Three common naturally radioactive elements are uranium, potassium, and carbon-14.

Radioactivity is a phenomenon in which certain unstable atoms undergo spontaneous nuclear decay and emit radiation in the form of particles or waves. Many elements found in nature are naturally radioactive, meaning they contain unstable isotopes that undergo radioactive decay.

Three common naturally occurring radioactive elements are:

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Full Question: "Some elements are naturally radioactive. Can you list 3 common ones?"

At STP 1mol of gas weighs 22.4L

Moles of chlorine

Now

Moles of AlCl_3

Mass of AlCl_3

To furnish 1.5 mol of carbon atoms from sucrose, you would need approximately 294.3 mL of aqueous 40% sucrose solution.

The molar mass of sucrose (C12H22O11) can be calculated as follows:

Molar mass of C12H22O11 = (12 * 12.01 g/mol) + (22 * 1.01 g/mol) + (11 * 16.00 g/mol)

                      = 144.12 g/mol + 22.22 g/mol + 176.00 g/mol

                      = 342.34 g/mol

Since each mole of sucrose contains 12 moles of carbon atoms, the molar mass of carbon is:

Molar mass of carbon = (12 * 12.01 g/mol)

                   = 144.12 g/mol

To calculate the mass of carbon atoms needed to furnish 1.5 moles, we can use the following formula:

Mass of carbon = (1.5 mol) * (144.12 g/mol)

             = 216.18 g

Now, we can calculate the volume of the aqueous 40% sucrose solution using its density:

Volume = Mass / Density

      = 216.18 g / 0.911 g/mL

      ≈ 237.34 mL

However, the 40% sucrose solution is not pure sucrose. We need to consider the actual amount of sucrose in the solution. A 40% sucrose solution means it contains 40 g of sucrose per 100 mL of solution.

Therefore, the volume of the aqueous 40% sucrose solution required would be:

Volume = (237.34 mL * 100 mL) / 40 g

      ≈ 593.35 mL

To furnish 1.5 mol of carbon atoms from sucrose, you would need approximately 593.35 mL of aqueous 40% sucrose solution.

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During the Pliocene epoch, which saw the arrival of Homo habilis, a possible ancestor of modern homo sapiens, and when herds of enormous, elephant-like mammals first appeared, atmospheric CO2 levels may have been comparable to those of today as recently as between 2 and 4.6 million years ago.

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Answer:

92.01 g/mol

Explanation:

So first you need to find the empirical formula by the percents. That would be, assuming that you have 100 grams of the the sample, divide each quantity of each element found by its respective molar mass.

30.4 g of N ÷ 14 g/mol N= 2.17 mol of N

69.6 g of O ÷ 16g/mol= 4.35 mol of O

You can establish now the empirical formula.

N2.17O4.35,

but since you can't have a decimal subscript, you divide each subscript by the minimum subscript

NO2

So then you're said that the molecular formula derived from that empirical formula has 2 nitrogen, so you multiply all the subscripts, by 2:

N2O4

-Dinitrogen Tetraoxide

-Nitrogen oxide (IV)

Then all you have to do is find the molecular mass of the compound using the periodic table and what you obtain is the molar mass.

remember: molecular mass is correspondent to molar mass.