PLS HELP!!Which is a future NASA research project? A. using a probe to collect data B. conducting research from a space station C. collecting samples on an asteroid D. conducting a space mission with no people

Explanation:

Slow cool rate in coarse

Fast cool rate in fine

Answer:

HEY THERE!!

Explanation:

The atomic radii increase, moving across a period to the left and down in a group

HOPE THIS HELPED HAVE A NICE DAY!!! <33

Answer:

O by increasing atomic number

Explanation:

Elements are arranged on the periodic table by increasing atomic number.

The atomic number of an element is the number of protons in such an atom. These protons are the positively charged particles in the atom.

Every atom of an element has a unique number of protons that distinguish it from other atoms.

Based on the number of protons which is the atomic number, elements are arranged on the periodic table.

The correct responses for where igneous rocks form are B. Igneous rocks form underneath Earth’s surface where magma cools down within the crust, and C.Option b is correct.

Igneous rocks form within Earth’s mantle where magma is typically found.Option A, "Igneous rocks form on Earth’s surface where magma reaches the surface," is incorrect. Rocks formed from magma that reaches the surface are called extrusive or volcanic igneous rocks.

Option D, "Igneous rocks form in Earth’s inner core where magma solidifies under heat and pressure," is also incorrect. The Earth's inner core is composed mainly of solid iron and nickel, and it is not the location where igneous rocks form.

Igneous rocks are formed when molten magma cools and solidifies. This process primarily occurs within the Earth's crust and mantle. Intrusive or plutonic igneous rocks are formed when magma cools slowly beneath the Earth's surface, while extrusive or volcanic igneous rocks are formed when magma reaches the surface and cools quickly.Option b is correct.

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Treating cis-Δ9-hexadecenoic acid with a Brønsted acid results in the formation of the carboxylate ion (species A) as the major species obtained, while species B is not formed.

To determine the major species obtained when treating cis-Δ9-hexadecenoic acid (palmitoleic acid) with a proper Brønsted acid, we need to consider the reaction and the properties of the compound.

When a Brønsted acid is used to treat a carboxylic acid like palmitoleic acid, it typically reacts by donating a proton (H+) to the carboxyl group, resulting in the formation of the corresponding carboxylate ion. In this case, the carboxyl group is the acidic functional group in palmitoleic acid.

The reaction can be represented as follows:

H3C - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH=CH - CH2 - CH2 - CH2 - CH2 - CH3

                    ||

                    COOH

+ Brønsted Acid → H3C - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH=CH - CH2 - CH2 - CH2 - CH2 - CH3

                                                    ||

                                                    COO-

In this reaction, the carboxyl group (-COOH) is converted into its conjugate base form (-COO-), which is referred to as the carboxylate ion. The major species obtained after the reaction is the carboxylate ion (species A, COO-).

Therefore, the correct statement is:

A. Species A is the major species obtained.

Option B is incorrect because it suggests that species B is obtained equally, which is not the case. Option C is incorrect because it implies that species B is the major species, which is not supported by the reaction. Option D is incorrect because it refers to the oxygen atom stabilizing the charge, which is not the determining factor in this specific reaction.

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The noble gas that does not have an octet of electrons in its outer shell is helium. While neon, argon, krypton, xenon, and radon all have a complete octet of electrons in their outermost shell, helium has only two electrons. Despite not fulfilling the octet rule, helium is stable due to its filled 1s orbital.

Noble gases, located in Group 18 of the periodic table, are known for their stable electron configurations. The octet rule states that atoms tend to gain, lose, or share electrons to achieve a stable configuration with eight electrons in their outermost shell, except for hydrogen and helium, which aim for two electrons. Among the noble gases, helium stands out because it has only two electrons in its outermost shell.

Helium has a single electron shell, and it can accommodate a maximum of two electrons in its 1s orbital. With both spaces in its outer shell filled, helium achieves stability, despite not having an octet. This stability arises from the completely filled 1s orbital, making helium unreactive and chemically inert.

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The volume needed to make 1.98 M of the solution is 2.12L

Molarity of a given solution is defined as the total number of moles of solute per litre of solution. One molar is the molarity of a solution where one gram of solute is dissolved in a litre of solution. As we know, in a solution, the solvent and solute blend to form a solution, hence, the total volume of the solution is taken.

Given,

Molarity = 1.98m

Moles = 4.2 mol

Molarity = number of moles of solute / volume of solution in L

Volume = moles / molarity

= 4.2 / 1.98

= 2.12 L

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The first one appear to be a pan with some liquid heating up.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The second one seems to be a ice cube melting.

Its beginning phase is solid, the phase change type is fusion, and its ending state is liquid.

The third one is water, or other liquid, making clouds.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The fourth illustration seems to be an aluminium can. There aren't really a phase change happening, but when we open the aluminium can containing gaseous drink, there are molecules of gas diluted into the liquid and some of it encouter each other to make a bubble of the gas and is released. It is not an actually phase change, it is the reverse process of diluting gas into liquid. Initially it is diluted gas, it gets released and in the end it is in gas phase.

These common names are frequently used in chemical and industrial contexts to refer to these specific derivatives of benzene.

Structure A: Toluene

Structure B: Phenol

Structure C: Aniline

Toluene, also known as methylbenzene, has a methyl group (-CH3) attached to the benzene ring. This is represented by Structure A.

Phenol, also called hydroxybenzene, features a hydroxyl group (-OH) attached directly to the benzene ring. This is depicted by Structure B.

Aniline, commonly known as aminobenzene, has an amino group (-NH2) attached to the benzene ring. This is illustrated by Structure C.

In summary:

- Toluene (Structure A) has a methyl group.

- Phenol (Structure B) has a hydroxyl group.

- Aniline (Structure C) has an amino group.

These common names are frequently used in chemical and industrial contexts to refer to these specific derivatives of benzene.

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The nuclide produced by the β⁻ decay of ²¹⁰Pb is ²¹⁰Bi. (option A)

During β⁻ decay, a neutron within the nucleus of ²¹⁰Pb is converted into a proton, resulting in the emission of a β⁻ particle (an electron). This process transforms the original nuclide into a new nuclide.

The atomic number of an element is determined by the number of protons in its nucleus. Since β⁻ decay involves the conversion of a neutron into a proton, the atomic number increases by one.

In the case of ²¹⁰Pb, which has an atomic number of 82, the β⁻ decay will result in an atomic number of 83, corresponding to the element bismuth (Bi).

Therefore, the nuclide produced by the β⁻ decay of ²¹⁰Pb is ²¹⁰Bi (option A).

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Answer: You would place the apple on the person's head.

Explanation:

Answer:

Sorry I don't know.

Explanation:

I'm in 8th grade.

According to Charle's law, the volume of the given mass of a gas is directly proportional to its absolute temperature provided that the pressure is constant. Mathemically;

where;

V1 and V2 are the initial and final volume of the gas

T1 and T2 are the initial and final temperatures of the gas (in Kelvin)

Given the following parameters:

Substitute the given parameters into the formula;

Therefore the volume of the gas at 20°C is approximately 97.67cm³

Answer:

Covalent bonds are the strongest bonds in nature and under normal biological conditions have to be broken with the help of enzymes. This is due to the even sharing of electrons between the bonded atoms and as with anything equally shared there is no conflict to weaken the arrangement.

Explanation:

Bonding electrons are described as electrons that participate in chemical bonds. Chemical bond, a strong attraction between atoms, ions, or molecules, might be the subject here. Atoms sharing electron pairs form a covalent or molecular connection. An attraction between the atomic orbitals of atoms in a molecule is called a bonding molecular orbital.

Which bonding type results in stronger bonds? What is your evidence?

A covalent bond is created when the difference between two atoms' electronegativities is too small for an electron transfer to occur and produce ions. Bonding electrons are collectively referred to as the electrons that are present between the two nuclei. The "glue" that binds the atoms into molecular structures is the bound pair.

It is the most powerful link. By sharing an electron, the two atoms in such a bond are joined together.

One Hydrogen atom with one valence electron and one Chlorine atom with seven valence electrons, for instance, make up the HCL molecule. In this instance, hydrogen and chlorine share an electron to create a single bond.

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Answer:

Lungs.

Explanation:

This is because the lungs are respiratory organs in the body that are located at the either side of the thorax or chest. These are organs that are incharge of exchange of gases. The air is breathe in through the trachea i.e oxygen is inhaled and carbondioxide which is the waste product is exhaled. Gas exchange take place in the lungs.

To generate 50.0 g of sodium chloride according to the given chemical equation, we need 91.12 g of sodium chlorate.

To calculate the grams of sodium chlorate required to generate 50.0 g of sodium chloride, we first need to use the balanced chemical equation to determine the molar ratio of sodium chlorate to sodium chloride. From the equation 2NaClO3 → 2NaCl + 3O2, we can see that for every 2 moles of sodium chlorate, 2 moles of sodium chloride are produced.
The molar mass of sodium chloride is 58.44 g/mol, and so 50.0 g of sodium chloride corresponds to 50.0 g / 58.44 g/mol = 0.8557 moles.
Since the molar ratio of sodium chlorate to sodium chloride is 2:2, or simply 1:1, we know that we need 0.8557 moles of sodium chlorate to generate 50.0 g of sodium chloride.
The molar mass of sodium chlorate is 106.44 g/mol, and so to convert moles to grams, we can simply multiply the number of moles by the molar mass. Therefore, we need:
0.8557 moles x 106.44 g/mol = 91.12 g of sodium chlorate.
Therefore, to generate 50.0 g of sodium chloride according to the given chemical equation, we need 91.12 g of sodium chlorate.

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Answer:

The equation for wave speed can be used to calculate the speed of a wave when both wavelength and wave frequency are known. Consider an ocean wave with a wavelength of 3 meters and a frequency of 1 hertz. The speed of the wave is: Speed = 3 m x 1 wave/s = 3 m/s.

SO... take your meters and hezert and do tha same

Explanation:

Plz mark me as brainlyist

Answer:

1

Explanation:

Answer:

Explanation:

The balanced equation says that we'll get 1 mole of H2 for every 1 mole of Mg.  50 grams of H is 50g/2 g/mole = 25 moles of H2.  That means we'll need 25 moles of Mg.  Convert that into grams:  (25 moles Mg)*(24.3 g/mole) = 607 grams Mg.  

At STP, all gases occupy 22.4 liters/miole.  That means 25 moles of H2 would occupy (25 moles)*(22.4 liters/mole) = 560 liters.

An infrared wave has a wavelength of 0.00005 m. this wavelength in scientific notation is 5.0 × 10⁻⁵ m.

Scientific notation is also called as standard form. Scientific notation is used to express the number that is too large number  or too small is  convenient written in a decimal form. scientific notation contains two part decimal number multiply power of 10.

given data is as follows :

infrared wave has wavelength = 0.000005 m

the scientific notation of the wavelength given is = 5.0 × 10⁻⁵ m

Thus, An infrared wave has a wavelength of 0.00005 m. this wavelength in scientific notation is 5.0 × 10⁻⁵.

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Answer:

A substance made from 2 or more elements is called a compound

The correct answer is E. Electrons flow from the anode to the cathode through an external wire.

In an electrochemical galvanic cell, which consists of an anode and a cathode connected by an external circuit, a redox (reduction-oxidation) reaction takes place. During this reaction, oxidation occurs at the anode, resulting in the loss of electrons, while reduction occurs at the cathode, leading to the gain of electrons.

The movement of electrons in the cell is crucial for the flow of electrical current. Electrons flow from the anode (where oxidation occurs) to the cathode (where reduction occurs) through the external wire. This movement of electrons creates an electric current that can be harnessed for various purposes, such as powering electrical devices.

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Answer:

NO2

Explanation:

N = Nitrogen

O = Oxygen

Answer:

NO. 2.

is the answer

hopes this helps

The bluish color that makes the atmosphere of neptune so beautiful to the human eye is caused by the interaction of sunlight with methane gas.

The compositions of Uranus but also Neptune are fairly similar at high altitudes. The existence of methane in both ice giants' upper atmospheres may be responsible for their blue hue. The majority of the red light that strikes the planets is absorbed by methane, giving the planets their blue appearance.

The blue marble occurrence of the faraway planet is actually a result of methane gas clouds. Methane is a gas that, despite making up a very small fraction of Neptune's atmosphere, absorbing red light's wavelengths while reflecting blue light outward.

Therefore, the bluish color that makes the atmosphere of neptune so beautiful to the human eye is caused by the interaction of sunlight with methane gas.

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b. The critical path refers to the longest sequence of activities from the start to the end of a project, considering the duration of each activity.

c. The total duration for the critical path activities is 18 days, which represents the expected project completion time.

The critical path is a term used in project management to refer to the sequence of activities that determines the minimum time required to complete a project. It is the longest path from the start to the end of the project, considering the duration of each activity. The critical path helps identify the activities that must be closely monitored and managed to ensure the project is completed on time.

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The number of moles of nitrogen required to fill the airbag, we need to use the ideal gas equation, which states PV = nRT.

Where, P = pressure of the gas

V = volume of the gas

n = number of moles of the gas

R = ideal gas constant

T = temperature of the gas

Given that the nitrogen gas is at a temperature of 495°C, we need to convert it to Kelvin by adding 273.15:

T = 495°C + 273.15 = 768.15 K

Assuming that the airbag is at standard atmospheric pressure, which is approximately 1 atmosphere (1 atm), and let's say the volume of the airbag is V liters (you haven't provided this information), we can rearrange the ideal gas equation to solve for n:

n = PV / RT

Substituting the values into the equation, we get:

n = (1 atm) * (V L) / [(0.0821 L·atm/(mol·K)) * (768.15 K)]

Simplifying the equation, we find the number of moles of nitrogen required to fill the airbag. since you haven't specified the volume of the airbag, we cannot provide a numerical value.

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Answer:

The correct answer is O=49.94 approx

Explanation:

To calculate the correct percent composition of (NH4)2CO3, first calculate the molar mass of the compound,

   Molar mass of N: 14.01 g/mol

   Molar mass of H: 1.01 g/mol

   Molar mass of C: 12.01 g/mol

   Molar mass of O: 16.00 g/mol

   Molar mass of (NH4)2CO3: (2 x 14.01 g/mol) + (8 x 1.01 g/mol) + 12.01 g/mol     + (3 x 16.00 g/mol) = 96.09 g/mol

Then we can calculate the percent composition of each element in (NH4)2CO3:

   Percent composition of N: (2 x 14.01 g/mol) / 96.09 g/mol x 100% = 29.14%

   Percent composition of H: (8 x 1.01 g/mol) / 96.09 g/mol x 100% = 8.41%

   Percent composition of C: 12.01 g/mol / 96.09 g/mol x 100% = 12.50%

   Percent composition of O: (3 x 16.00 g/mol) / 96.09 g/mol x 100% = 50.95%

Therefore, the correct percent composition for (NH4)2CO3 is:

   N = 29.14%

   H = 8.41%

   C = 12.50%

   O = 50.95%

In the decomposition of hydrogen peroxide, you follow the reaction by studying the production of oxygen gas in a wash bottle, which displaces water out of the bottle. The location where you should measure the temperature to characterize the gas is about two inches above the bottle.

The decomposition of hydrogen peroxide is the process of breaking down hydrogen peroxide into water and oxygen. This reaction occurs spontaneously in the presence of light or in the presence of a catalyst. Hydrogen peroxide is a strong oxidizing agent that is widely used in industry and medicine.

You should measure the temperature of the gas about two inches above the bottle to characterize the gas. Since the production of oxygen gas takes place in the wash bottle and displaces water out of the bottle, the displaced water is not a good location to measure the temperature. Similarly, the temperature of the gas cannot be measured inside the test tube or in the liquid in the bottle. To obtain an accurate measurement of the temperature of the gas produced in the reaction, you should measure the temperature of the gas about two inches above the bottle. This is because the temperature of the gas will be closest to the actual temperature of the gas in this location.

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The value of Kb for Bro- at 25°C is 3.57 x 10^-6. To determine the value of Kb for Bro-, we need to use the relationship between Ka and Kb for a conjugate acid-base pair.

The equation for this relationship is: Ka x Kb = Kw

where Kw is the ion product constant of water, which is 1.0 x 10^-14 at 25°C.

In this case, HBrO is the conjugate acid of Bro-, so we can write:

Ka(HBrO) x Kb(Bro-) = Kw

Substituting the given value for Ka(HBrO):

2.8 x 10^-9 x Kb(Bro-) = 1.0 x 10^-14

Solving for Kb(Bro-):

Kb(Bro-) = (1.0 x 10^-14) / (2.8 x 10^-9)

Kb(Bro-) = 3.57 x 10^-6

Therefore, the value of Kb for Bro- at 25°C is 3.57 x 10^-6.

In summary, we used the relationship between Ka and Kb for a conjugate acid-base pair, along with the ion product constant of water, to determine the value of Kb for Bro-.

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The compound that does not undergo conjugate addition with butanamine is option Butenone. (D)

Conjugate addition, also known as 1,4-addition, is a type of reaction where a nucleophile adds to the beta-carbon of an alpha, beta-unsaturated carbonyl compound. Butanamine, also known as butylamine, is a nucleophile that can undergo conjugate addition with alpha, beta-unsaturated carbonyl compounds.

Propenal (option a), but-2-enal (option b), and but-3-enal (option c) are all alpha, beta-unsaturated carbonyl compounds and can undergo conjugate addition with butanamine.

Butenone (option d), also known as 2-butanone, is not an alpha, beta-unsaturated carbonyl compound and therefore cannot undergo conjugate addition with butanamine.

Therefore, the correct answer is option d. Butenone.

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