Given the valence electron orbital level diagram and the description, identify the element or ion.
(a)
a ground state atom
2s 2p
↑↓ ↑↓ ↑↓ ↑_
chemPad
(b)
an atom in an excited state (assume the core electron levels are filled)
2s 2p
↑_ ↑_ ↑_ __
chemPad
(c)
a ground state ion with a charge of +1
4s 4p
↑↓ ↑↓ ↑_ ↑_

Answer:

magnesium iodide MgI2

Explanation:

A 0.9% normal saline solution is often administered with intravenous medication because it is isotonic to the bloodstream.

A 0.9% normal saline solution is also known as normal saline or physiological saline solution. It is a solution that contains 0.9% (w/v) of sodium chloride (NaCl) or common table salt in the water. This solution has the same osmotic pressure as the extracellular fluids of the body. That is to say, it contains the same concentration of water and solutes as the cell cytoplasm making it isotonic to the bloodstream.

When any solution is isotonic to the bloodstream, it means that it has the same concentration of dissolved particles or solutes  (ions, molecules, minerals etc.) as the blood plasma. This allows the solution to be transported without causing much changes in the osmotic pressure of the blood, otherwise which would lead the cells to shrink or swell due to disturbance in osmosis equilibrium.

That is why, a 0.9% normal saline solution is a commonly used intravenous fluid for administering medication, as it helps to maintain the balance of fluids and electrolytes within the body without causing any negetive effects.

Learn more about osmosis :

https://brainly.com/question/1799974

#SPJ4

Answer: C and D

Explanation:

Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

brainlest?

Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.

Answer:

left is chemical because its chemicals, and right is physical because the ice cream is melting and thats physical

Explanation:

Answer:

it is then exhaled

Explanation:

Carbon dioxide passes from the blood into the alveoli and is then exhaled.

Answer:

by mixing red and yellow

Explanation:

Answer:

Either the sun or by mixing red and yellow together because they make orange.

Explanation:

Brainliest pls

1.37 × 10⁻²¹ mol C

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

825 atoms C

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

\(\displaystyle 825 \ atoms \ C(\frac{1 \ mol \ C}{6.022 \cdot 10^{23} \ atoms \ C} )\) = 1.36998 × 10⁻²¹ mol C

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.36998 × 10⁻²¹ mol C ≈ 1.37 × 10⁻²¹ mol C

We can see that Trial 1 was more efficient than Trial 2, since it had a higher percentage yield. This suggests that using a smaller amount of oxygen relative to SiCl₄ is more efficient for this reaction

What is Percentage Yield?

It compares the actual yield of a reaction to the theoretical yield that would be obtained if the reaction proceeded perfectly, and expresses the result as a percentage.

To calculate the percentage yield for SiO₂ in Trial 1, we first need to determine the theoretical yield. We can do this by using stoichiometry and the amount of SiCl₄, which is the limiting reactant:

1 mole SiCl₄ reacts with 1 mole O₂ to produce 1 mole SiO₂ and 1 mole Cl₂

The molar mass of SiCl₄ is 169.9 g/mol, so 100 g of SiCl₄ is equivalent to 100/169.9 = 0.588 moles.

Since 32.96 g of O₂ was used, which has a molar mass of 32 g/mol, this is equivalent to 32.96/32 = 1.03 moles of O₂.

Since oxygen is the excess reactant, we can use the amount of SiCl₄ to calculate the theoretical yield of SiO₂:

0.588 moles SiCl₄ × 1 mole SiO₂/1 mole SiCl₄ × 60.1 g SiO₂/1 mole SiO₂ = 35.8 g SiO₂

The actual yield of SiO₂ in Trial 1 was 50 g. Therefore, the percentage yield is:

(50 g SiO₂/35.8 g SiO₂) × 100% = 139.7%

This indicates that the experiment produced more SiO₂ than was theoretically predicted. There are a number of possible reasons for this, such as experimental error or the presence of impurities in the reactants.

To determine the leftover reactant, we can use stoichiometry and the amount of SiCl₄ that was used:

0.588 moles SiCl₄ - 0.5 moles SiO₂ produced = 0.088 moles SiCl₄ remaining

The leftover reactant is equivalent to:

0.088 moles SiCl₄ × 169.9 g SiCl₄/1 mole SiCl₄ = 15 g SiCl₄

Therefore, 15 g of SiCl₄ was leftover in Trial 1.

b. We can use the percentage yield from Trial 2 to determine which ratio of reactants is more efficient. Since the amount of SiCl₄ was kept constant, the change in the yield must be due to the change in the amount of O₂. To compare the efficiency of different ratios, we can calculate the theoretical yield for each trial and compare it to the actual yield:

Trial 1: Theoretical yield of SiO₂ = 35.8 g, actual yield = 50 g, percentage yield = 139.7%

Trial 2: Theoretical yield of SiO₂ = 107.4 g, actual yield = 60 g, percentage yield = 55.8%

From these results, we can see that Trial 1 was more efficient than Trial 2, since it had a higher percentage yield. This suggests that using a smaller amount of oxygen relative to SiCl₄ is more efficient for this reaction.

Learn more about Percentage Yield from given link

https://brainly.com/question/2451706

#SPJ1

Answer:

Carbon Monoxide- D)

Nitrogen Oxides- A)

Particulate matter- C)

Sulfur Oxides- B)

Explanation:

Answer is 100% verified

Count on me, I'm a Chemistry Guru

Answer:

Al:F3​:: 3:19.

Explanation:

Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual volume = 4.13 mL

error = 4.13 - 4.09 = 0.04

We have

\(p(\%) = \frac{0.04}{4.13} \times 100 \\ = 0.968523002...\)

We have the final answer as

Hope this helps you

Answer:

Iron has 26 electrons. Potassium has 39 neutrons. Nickel has 28 protons.

Explanation:

The electromagnetic spectrum consists of various types of electromagnetic radiation, such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each type of radiation has different wavelengths and frequencies.

When it comes to the absorption of electromagnetic radiation by different substances, it depends on the properties of the substance and the type of radiation.

In the case of berry juice, it is likely to absorb visible light and some UV radiation due to the presence of pigments such as anthocyanins. Carbon, on the other hand, is a good absorber of infrared radiation due to its unique molecular structure. Lastly, Tio2 (titanium dioxide) is known for its ability to absorb UV radiation, which makes it a common ingredient in sunscreens and other UV-blocking products. In summary, each layer is expected to absorb different parts of the electromagnetic spectrum based on their unique properties and the type of radiation they interact with.
The electromagnetic spectrum is a range of all types of electromagnetic radiation, including visible light, ultraviolet (UV) light, and infrared (IR) light. Each layer absorbs different parts of the spectrum:

a. Berry juice: Berry juice primarily absorbs visible light, especially in the blue and green parts of the spectrum. This is due to the presence of pigments such as anthocyanins that give the juice its characteristic color.

b. Carbon: Carbon absorbs in the UV and IR parts of the electromagnetic spectrum. In the UV region, it can absorb radiation due to the presence of pi-electrons, while in the IR region, it absorbs radiation due to molecular vibrations.

c. TiO2 (titanium dioxide): TiO2 absorbs UV light, especially in the UV-A and UV-B regions of the spectrum. This is why it is commonly used as an active ingredient in sunscreens to protect the skin from UV radiation.

For more information on electromagnetic spectrum visit:

brainly.com/question/23727978

#SPJ11

1. Water flows through the penstock

2. The water then spins the blades in a turbine which, in turn, spins a generator that ultimately produces electrical energy

Hydropower, or hydroelectric power, is one of the oldest and largest sources of renewable energy, which uses the natural flow of moving water to generate electrical energy. The moving water is passed through a pipe also known as penstock, it then turns the blade of the turbine. which then rolls or spin a generator thereby electricity is produced.

The work of the turbine is to convert the kinetic energy of the running water into useable energy.

learn more about conversion of water to electrical energy from

https://brainly.com/question/18776929

#SPJ1

According to the question the molarity of the Ba(OH)2 solution is then 0.976 M.

What is molarity?

Molarity is a unit of measurement for concentration of a solute in a solution. It is defined as the number of moles of the solute per liter of solution. Molarity is often used to describe the concentration of ions, molecules, or other constituents in a solution. It is an important parameter in many areas of chemistry, including analytical, organic, and inorganic chemistry.

The molarity of a solution can be calculated using the expression M =  moles of solute/liters of solution. In this case, the moles of solute is the amount of Ba(OH)2 in the solution, which can be calculated using the amount of HNO3 required to titrate it.

Since 1 mole of HNO3 reacts with 1 mole of Ba(OH)2, the moles of Ba(OH)2 can be calculated using the amount of HNO3 used in the titration. The equation is moles of Ba(OH)2 = (20.4 mL)(1.13 M)(1 L/1000 mL) = 0.02292 moles. The molarity of the Ba(OH)2 solution is then M = 0.02292 moles/23.43 mL = 0.976 M.

To learn more about molarity

https://brainly.com/question/26873446

#SPJ1

An element in group 6A, period 3 with an atomic number of 16 would be brittle in nature.

Brittleness is the characteristic of a substance to break easily when hit with an object or against an object.

The element with the atomic number 16 is sulfur. Sulfur does not conduct heat nor electricity and neither can it be turned into wire.

Sulfur exists naturally as a brittle solid that is yellow in appearance.

More on sulfur can be found here: https://brainly.com/question/13469437

#SPJ1

Out of the given molecules and ions, CO32- will exhibit delocalized pi (π) bonding.

Delocalized π bonding occurs when the π electrons in a molecule are not confined to a single bond between two atoms, but instead spread out over multiple atoms or a larger area of the molecule. In CO32-, the central carbon atom has a double bond with each of the two oxygen atoms and a single bond with the third oxygen atom.

The π electrons in these double bonds are shared between all three oxygen atoms, creating a delocalized π bond. This delocalization allows for greater stability and makes the molecule less reactive. The other molecules and ions listed do not have delocalized π bonding because their π electrons are confined to a single bond between two atoms.

Learn more about molecules at https://brainly.com/question/17930825

#SPJ11

The amount of heat is 288 kJ  needed to increase the temperature of 300g of water (specific heat 4.18J/g°C) from 27°C to 50°C

Heat is the transfer of kinetic energy from one medium to the object from another medium

Here given data is

Temperature = 27°C to 50°C

Specific heat =  4.18J/g°C

Mass = 300g

WE have to calculate the amount of heat =?

The formula is

the amount of heat

Q = mCΔT

Q = 300g × 4.18J/g°C × (27°C - 50°C)

Q =  300g × 4.18J/g°C × 23

Q = 288 kJ

Know more about amount of heat

https://brainly.com/question/3155189

#SPJ1

Answer:

Explanation:

These terms simply have to be memorized, but understanding their structure can help you gain a better grasp of their functions.  Lipids have fatty acid chains with lots of bonds, so they are high energy.  Nucleic acids have pieces that can be rearranged into many combinations that can be read by certain structures.  Proteins are composed of different building blocks with different properties.  The sum of these properties is the function of the protein.  Lastly, carbohydrates have compact monomers that are extremely easy to break apart into energy.

Answer:

Lipids -  used for long-term energy storage

Proteins - used for tissue repair and growth

Nucleic acids -  used for storing and transmitting genetic  information

Carbohydrates -  used for energy

Explanation:

Both lipids and carbohydrates are used for energy storage. However, lipids are used for long-term storage and store twice as much energy as carbohydrates, while carbohydrates are used for short-term storage.

Proteins play many roles in our bodies. They are used for tissue repair and growth, metabolic reactions, and coordination of bodily functions. They also maintain proper pH and fluid balance.

Nucleic acids are macromolecules found in all cells and viruses used for storing and transmitting genetic information. Two main types of nucleic acids are DNA and RNA.

Answer:

he was born on planet krypton

Based on the percentage mass of magnesium oxide in the sample, the mass of Magnesium oxide in the sample is 0.42 g.

Magnesium is a metallic element with an atomic number of 12.

Magnesium is an important mineral that is used as a supplement s well as in drugs such as milk of magnesia.

Considering the given magnesium supplement:

1.02 g magnesium supplement contains 25.0% Mg by mass.

Magnesium is present in the supplement as magnesium oxide, MgO.

The molar mass of magnesium oxide, MgO = 40.30 g/mol

Molar mass of magnesium = 24.0 g

Percentage mass of Magnesium oxide in the sample = 40.3 / 24 * 25

Percentage mass of Magnesium oxide in the sample = 42%

Mass of Magnesium oxide in the sample = 42 % * 1.02

Mass of Magnesium oxide in the sample = 0.42 g

Learn more about percent mass at: https://brainly.com/question/17812901

#SPJ1

Side product which is obtained during the dehydration of cyclohexanol  which is a organic type of chemical reaction is dicyclohexyl ether .

Chemical reactions are defined as reactions 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 reaction.

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

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

During chemical reactions atoms are rearranged and reactions are accompanied by an energy change as new substances are formed.

Learn more about chemical reactions,here:

https://brainly.com/question/14929452

#SPJ1

In a physical change, the substance's shape or appearance changes, but the type of matter it contains stays the same. But when matter undergoes a chemical change, at least one new substance with novel properties is created.

Chemical synthesis, or, alternatively, chemical decomposition into two or more different substances, occurs when one substance reacts with another to create a new substance.

Physical modifications are those that affect a chemical substance's form but not its chemical composition. Physical changes are usually unable to separate compounds into chemical elements or simpler compounds, but they can be used to separate mixtures into their component compounds.

An overview was given as your information is incomplete.

Learn more about chemical change on:

https://brainly.com/question/19794032

#SPJ1

The specific heat capacity of the nickel metal is 0.45.

Let us recall that the specific heat capacity is used to describe the amount of the quantity of heat that is able to cause the temperature of a unit mass of a substance to increase by 1 kelvin.

Now we know that the heat that is lost by the metal is equal to the heat that is gained by the water as such we have;

mcwdT = -mcmdT

cm = mcwdT/mdT

cm = Heat capacity of the metal

cw = Heat capacity of the water

m = mass of the metal and the water

dT = temperature change

To obtain the heat capacity;

cm = 150 * 4.2 * (25 - 23.5)/-28.2 * (25.0 - 99.8)

cm = 945/2109.4

cm = 0.45

Learn more about specific heat capacity:https://brainly.com/question/28302909

#SPJ1

In order to determine if a chemical hazard truly exists, there are several pertinent pieces of chemical information that must be considered. Firstly, the chemical composition of the substance in question must be examined, including its molecular formula and structural properties.

This information can help to determine the potential toxicity and reactivity of the chemical, as well as its potential routes of exposure (e.g. inhalation, ingestion, skin contact).

Additionally, data on the physical properties of the chemical - such as its melting point, boiling point, and solubility - can be important in determining how the substance may behave in different environments and under different conditions.

Finally, information on the potential environmental impact of the chemical, such as its persistence in the environment or its potential to bioaccumulate, can also be crucial in assessing the overall hazard posed by the substance.

By considering all of these factors together, a comprehensive picture of the potential hazards associated with a particular chemical can be developed, helping to inform appropriate risk management strategies and protective measures.

To know more about chemical hazard, refer here:

https://brainly.com/question/13340017#

#SPJ11

It’s 7.72 it took a while but I found the answer