Arizona often has hot, dry weather. casey wonders what could cause weather like this and looks up the different kinds of air masses. what kind of air mass would most likely bring this sort of weather?

In the laboratory, hydrogen gas is used as fuel for various purposes, including heating. In order to start the heating process, it is necessary to allow the hydrogen gas to flow continuously for a while. This is because there may be air or other gases present in the hydrogen gas pipeline that can affect the heating process.

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The right option is C, the correct noble gas notations for Li is [He] 2s¹.

We know that the atomic number of Li is 3 , so it will have 3 electrons in total, in filling electrons the electronic configuration is came as follows:

1s²2s¹ , but we asked for noble gas electronic configuration , so in this type of way of writing a noble gas configuration , we write by using the most nearer electronic configuration of a noble gas.

Let us see each option in each case,

So the correct notation will be [He]2s¹ which is option C.

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Avogadro's law states that in every mole of a substance, there are \(6.022 \times 10^{23}\) molecules.

This means that in 2.3 moles, there are \(2.3(6.022 \times 10^{23})=\boxed{1.4 \times 10^{24} \text{ (to 2 sf)}}\)

Answer:

hehe what is that??

Answer:

Answer A

Neutrons and protons

Prediction is to nearness as non-contingent is to contingent.

Prediction refers to forecasting or estimating future events or outcomes. Nearness, in this context, may refer to the proximity or closeness of the prediction to the actual outcome. Non-contingent refers to something that is not dependent or conditional on other factors. Contingent, on the other hand, refers to something that is dependent or conditional on other factors.

So, in this comparison, it could be said that a prediction that is near or accurate would be considered non-contingent, while a prediction that is not accurate or is dependent on other factors would be considered contingent. It's important to note that this comparison is not absolute, as both prediction and non-contingent/contingent are broad concepts with many different contexts and nuances.

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Answer:

The energy transferred between particles.

Explanation:

Temperature is a measure of the average translational kinetic energy of the molecules of a system. Heat is commonly expressed in either of two units: the calorie , an older metric unit, and the British thermal unit (Btu), an English unit commonly used in the United States. Scientists express heat in terms of the joule , a unit used for all forms of energy.

As heat is added to a substance in the solid state, the molecules of the substance gain kinetic energy and the temperature of the substance rises. 

Answer:D

Explanation:

The correct option is D. A gas is released and a black solid forms.

Carbon, hydrogen, and oxygen atoms make up sugar. When heated over a candle, these materials react with the fire and turn into liquids. Heat causes the sugar's atoms to interact with the oxygen in the air, forming new atomic groups. Energy is released during this chemical reaction in the form of smoke and black soot.

The main functions of sugars include their ability to sweeten things, maintain and intensify flavours, act as antioxidants and preservatives, and interact with water to change how it behaves. Fermentation, caramelization, Maillard reactions, or the creation of browning compounds, are examples of chemical processes.

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Question:

During a science class investigation, a teacher places a small amount of sugar in a beaker and then heats it over a candle. Which of the following would be the best evidence that a change in the chemical properties of the sugar has taken place?

A. The sugar changes color.

B. The sugar dissolves in the water.

C. The sugar melts and turns into a liquid.

D. A gas is released and a black solid forms.

Answer:

3N, Right

Explanation:

A metal in chemistry refers to a group of elements that have common characteristics, such as being good conductors of heat and electricity, being malleable and ductile, and having a metallic luster.

Some examples of metals include:

The purpose of these metals depends on their physical and chemical properties as well as the specific use for which they are made. 

The answer is general since this question is incomplete and the similar one is nowhere to be found. 

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The partial pressure of oxygen at a depth of 80 m, where the total pressure is 9.0 atm, is 1012.36 Pa or 0.009 atm (approx).

Given that the partial pressure of oxygen at the surface where the total pressure is 1.00 atm is 0.21 atm, we can use the following formula to calculate the partial pressure of oxygen at a depth of 80 m:

P2 = P1 + (d × ρ × g) where,P1 = 1 atm, P2 = 9 atm (total pressure at 80 m depth), ρ = density of air = 1.29 kg/m3 (at standard temperature and pressure), g = acceleration due to gravity = 9.8 m/s2, d = depth = 80 m

Now, substituting the given values in the above formula:

P2 = P1 + (d × ρ × g)

P2 = 1 + (80 × 1.29 × 9.8)

P2 = 1 + 1011.36

P2= 1012.36 Pa

Thus, the partial pressure of oxygen at a depth of 80 m, where the total pressure is 9.0 atm, is 1012.36 Pa or 0.009 atm (approx).

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Answer: Metals:-

1) Gold

2) Silver

3) Iron

4) Copper

5) Nickel

6) Aluminum

7)Mercury( Liquid metal)

8) Titanium

9) Radium

10) Californium

Non-metals:-

1) Diamond

2) Sulphur

3) Graphite

4) Carbon

5) Iodine

6) Tincture

7) Bromine (liquid non-metal)

8) Phosphorus

9) Silicon

10) Boron

Hope this helps..... Stay safe and have a Merry Christmas!!!!!!!! :D

Explanation:

To properly remove gloves, first, pull the gloves by the fingertips and then, pull on the outside of the glove on 1 side of the hand and remove it. Then insert a finger that has been removed from the glove between the interior edge of the second glove and the skin, and remove the second glove.

Sterile surgical gloves are gloves that are usually used by medical personnel to avoid patient droplets. The purpose of using Handscoon is to prevent cross-infection and prevent transmission of germs, used for surgical and surgical purposes.

When wearing and removing gloves, of course, there are special steps to avoid the spread of bacteria. The steps for removing gloves are:

First, pull the gloves by the fingertips and then, pull on the outside of the glove on 1 side of the hand and remove it. Then insert a finger that has been removed from the glove between the interior edge of the second glove and the skin, and remove the second glove.

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The amount of oxygen needed for complete combustion of the toluene is 3.249 grams. The total moles of gaseous products formed are 3.971 moles. The molecules of water vapor formed are 8.684 x 10²².

One of the compounds used to increase the octane rating of gasoline is toluene. Suppose 38.4 mL of toluene (d= 0.867 g/mL) is consumed when a sample of gasoline burns in air. In order to solve the above problem, let us write the chemical equation for the combustion of toluene is as follows:

C₇H₈ + 9O₂ → 7CO₂ + 4H₂O

In the above reaction, we can see that 9 moles of oxygen are needed to completely combust one mole of toluene. Hence, the amount of oxygen needed for complete combustion of toluene can be calculated as follows:

n(C₇H₈) = m(C₇H₈)/M(C₇H₈)

n(C₇H₈) = d × V / M(C₇H₈)

n(C₇H₈) = 0.867 g/mL × 38.4 mL / 92.14 g/mol = 0.361 mol

So, the amount of oxygen needed for complete combustion of toluene = 9 × 0.361 = 3.249 g

In the above reaction, there are 11 moles of gaseous products, i.e., 7 moles of CO₂ and 4 moles of H₂O.

So, the amount of moles of gaseous products formed can be calculated as follows: n(gas) = 11 × n(C₇H₈)

n(gas) = 11 × 0.361 = 3.971 mol.

The amount of moles of H₂O formed can be calculated as follows:

n(H₂O) = 4 × n(C₇H₈)

n(H₂O) = 4 × 0.361 = 1.444 mol

Now, we can calculate the number of molecules of water vapor as follows:

n(H₂O) = N × Na

N = n(H₂O) / Na

N = 1.444 mol / 6.022 x 10²³ mol¯¹ = 8.684 x 10²²

Hence, the number of molecules of water vapor formed is 8.684 x 10²².

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vaccum

Explanation:

vaccum is your answer

I hope you help

Answer:

A.pack your lunch in a reusable container each day

Explanation:

done!!!mark me the brainliest

The partial pressure of each noble gases is  P(He) = 0.5420 atm, P(Ne) = 0.2932 atm and P(Kr) = 0.1648 atm.

The pressure that's wielded by one among the admixture of feasts if it occupies the same volume on its own is known as Partial pressure. Every gas exerts certain pressure in a admixture. The total pressure of a a mixture of an ideal gas is the sum of partial pressures of individual feasts in the admixture,

Dalton's Law of partial pressure,

Ptotal = P(He) + P(Ne) + P(Kr)

P(He) = X(He)*Ptotal,

P(Ne) = X(Ne)*Ptotal,

P(Kr) = X(Kr)*Ptotal

X(He)= n(He)/ntotal,

X(Ne)= n(Ne)/ntotal ,

X(Kr)= n(Kr)/ntotal

ntotal = n(He) + n(Ne) + n(Kr)

so by calculating,

n= m/M

n(He) = 5.50 g/ 4.003 g/mole = 1.374 mol

n(Ne) = 15.0 g / 20.18g/mole = 0.7433 mol

n(Kr) = 35.0 g/83.80 g/mole = 0.4177 mol

ntotal = 1.374 mol + 0.7433 mol + 0.4177 mol = 2.535 mol

P(He) = X(He)*Ptotal = (1.374 mol/2.535mol)(1 atm) = 0.5420 atm

P(Ne) = X(Ne)*Ptotal = (0.7433 mol/ 2.535 mol)(1 atm) = 0.2932 atm

P(Kr) = X(Kr)*Ptotal = (0.4177 mol/2.535 mol)*(1 atm) = 0.1648 atm

Therefore, partial pressure of gases:

P(He) = 0.5420 atm

P(Ne) = 0.2932 atm

P(Kr) = 0.1648 atm

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Complete question:

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert blanketing gases. A chemical engineer places a mixture of noble gases consisting of 5.50g of He, 15.0g of Ne and 35.0g Kr in a piston cylinder assembly at STP=0 degree Celsius and 1atm. RAM: He 4.003g/mole, Ne 20.18g/mole and Kr 83.80g/mole. What is the partial pressure for each noble gas?

The graph shows that as mass increases, kinetic energy increases exponentially. This means that as the mass of an object increases, the kinetic energy increases by a larger and larger amount.

This can be seen by the upward sloping line on the graph. This can be seen in the graph by the steepness of the line, which shows that the increase in kinetic energy is growing faster and faster as the mass increases. Additionally, the graph shows that the rate of increase in kinetic energy is greater for lower masses than for higher masses, which indicates an exponential increase. This can be seen by the upward sloping line on the graph.

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The false statement is Option (d)

d) Suppose you were 60ft beneath the surface of ocean scuba diving and took a deep breath of air from your tank and held your breath. It is a good idea to start ascending without exhaling.

If you hold your breath while ascending to the surface, your lungs and the air within them expands as the water pressure weakens. since the air has no place to get out it will be pressurized between the wall of the lungs. It gets keep on swelling between the walls of the lungs .

Frequent changes in the pressure of the air which is present in the walls of the lungs during the ascending or descending without exhaling can cause a serious lung injury.

When a scuba diver descends to deeper depths in the oceans he has to breathe air through a device the compressed air consists of 71% nitrogen and 28% oxygen.

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The peptide bond between which two amino acid residues is cleaved by HIV protease will be "Phenylalanine Proline".

Whenever the carboxyl group with one molecule combines at all with  the amino group of the other molecule, a molecule of water is released, and a peptide bond is created among the two molecules (\(H_{2} O\))

The HIV protease breaks down large precursor proteins towards smaller ones. A new HIV virus is created when these smaller proteins interact with both the genetic material of HIV. HIV cannot replicate when protease is blocked by protease inhibitors (PIs).

HIV protease breaks down freshly created polyproteins specifically, Gag as well as Gag-Pol at nine cleavage sites to produce the mature protein components of such an HIV virion, the infectious version of the virus beyond the host cell. HIV virions do not spread disease in the absence of an efficient HIV protease.

Therefore, the peptide bond between which two amino acid residues is cleaved by HIV protease will be "Phenylalanine Proline".

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Answer:

Mole fraction for C₂₂H₁₉Cl₂NO₃ = 0.0086

Explanation:

Mole fraction remains a sort of concentration. It indicates:

moles of solute / (moles of solute + moles of solvent)

Moles of solute / Total moles.

Solute: Cypermethrin → C₂₂H₁₉Cl₂NO₃

Solvent: Water (PM = 18g/mol)

We calculate moles from solvent: 1000g /18 g/mol = 55.5 moles

We calculate PM for C₂₂H₁₉Cl₂NO₃

12g/mol . 22 + 1g/mol . 19 + 35.45 g/mol . 2+ 14g/mol + 16g/mol . 3 = 416 g/m

Moles of solute: 200 g / 416g/mol = 0.481 moles

Total moles: 0.481 + 55.5 = 55.98 moles

Mole fraction for C₂₂H₁₉Cl₂NO₃ = 0.481 moles / 55.98 moles = 0.0086

Expert Electronics, a company that designs and manufactures SDR transceivers, has created an external antenna tuner.

The name of the external antenna tuner from Expert Electronics is the SunSDR ATU. The SunSDR ATU is used to optimize the antenna system's impedance for maximum power transfer and reception, which can improve signal quality

.The SunSDR ATU is a remotely controlled automatic antenna tuner that can handle up to 150 W of power.

This external antenna tuner can tune unbalanced antennas, such as a dipole, long wire, or end-fed antenna, as well as balanced antennas, such as a loop or doublet, and can be used in a variety of environments.

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The external antenna tuner from Expert Electronics is called the ATU-100. It is a compact and lightweight automatic tuner designed for use with Expert Electronics transceivers that have a built-in ATU. The ATU-100 can be used with any external antenna, and it can handle up to 100 watts of power.

It uses a microprocessor-controlled tuning algorithm to quickly and accurately match the impedance of the antenna to the transceiver. The tuner is very easy to use, with a simple interface that allows you to select the desired frequency range and adjust the tuning parameters.

The ATU-100 is also very rugged and durable, with a compact design that makes it ideal for portable and mobile operations. It is built to withstand harsh operating conditions and can be used in a variety of environments. The tuner is also very energy-efficient, with a low power consumption that makes it ideal for use in battery-powered applications.

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Answer:

m =1,182.8g

Explanation:

there you go

In a case whereby ronaldo is using a method known as vapor concentration when investigating a suspected arson case. what  he is most likely trying to do find hydrocarbons in evidence.

A vapor concentration method can be seen as one that was proposed to measure the transient concentration field of vapor however this method is based on modified background oriented Schlieren  as well as  image processing and in this method the Evolution of vapor concentration during impact of volatile droplets is  gotten.

Hence in the case above, when investigating a suspected arson case. Ronaldo is most likely trying to do find hydrocarbons in evidence.

Therefore, option A is correct.

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missing options:

find hydrocarbons in evidence

determine the point of origin

collect a substrate control

measure the blast effect

Answer: A

Explanation:

Answer:

A Thermal Energy and Electrical Energy

Explanation:

First it goes thermal then it transposed to electricity

Answer:

c and A

Explanation:

Answer:

1.5g/cm³

Explanation:

None needed :)

Answer:

It should be Solid B.

Explanation:

The data can show us that X ,Y and Z are all esters

The law of definite proportions, also known as Proust's Law, states that a given chemical compound always contains the same elements in the same proportion by mass.

This means that no matter how a compound is obtained or prepared, its elemental composition will always be the same. For example, water is always composed of hydrogen and oxygen in a ratio of 2:1, regardless of its source or method of preparation.

The law of definite proportions is a fundamental principle of chemistry and provides evidence for the atomic theory of matter.

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Answer:

Geosphere

Explanation:

The sphere that was affected by this transformation is the geosphere.

The geosphere is the solid part of the earth which is made up of rocks and soils.

Answer: C

Explanation: