Use the hypothetical atom drawings (A-F) below to answer the next four questions. Note there is only one correct choice for each question and each choice is only used once. a.Which shows the absorption of violet light? Explain your reasoning.b.Which shows the emission of blue light? Explain your reasoning.c.Which shows the absorption of green light? Explain your reasoning.d.Which the emission of orange light? Explain your reasoning.e.Which shows an electron being ejected from the atom?

Answer:

to become a noble gas element P will have 2 electrons in it's outer most energy level if it has one energy level

and eight in the last energy level if more than one

The answer is A) Quantitative because Carrie has collected actual data and has not just made a judgement or prediction.

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Answer:

A. In an aborn, negatively charged electrons are dispersed in the space surrounding tho positively charged nucleus of an atom

C. In an atom, the positive energies are located in a small core within the atom called the nucleus

Explanation:

the answers are options A and C.

In the year 1909, Emest Rutherfords performed this experiment from which his atomic model came about. The atomic model gave a description of atom to be a small core which is dense and which has a nucleus that is positively charged. Rutherford in his model tries to give a  description of the atom as mainly just empty space and that it has electrons going through a static or fixed charged nucleus. While doing this they are in sets and their paths are predictable.

Answer:

0.266 moles of Na⁺

Explanation:

First step we dissociate the salt:

Na₃AsO₄  →  3Na⁺  +  AsO₄⁻³

From 1 mol of sodium arsenate, we must have 3 moles of sodium cation and 1 mol of arsenate.

We determine the moles of salt:

18.4 g . 1 mol/ 207.89 g = 0.0885 moles of salt.

We apply the followring rule of three:

1 mol of salt has 3 moles of Na⁺

0.0885 moles of salt may have (0.0885 . 3) / 1 = 0.266 moles of Na⁺

Answer:

A Sink

Explanation:

Anything greater than 1g/cm3 will sink in water

Answer:

c is speed of light (in terms of velocity)

v is velocity

lambda is wavelength

Explanation:

speed of light is constant at 3 x 10^8 m/s which is a velocity value. Lambda is usually in the units of nanometers which represents wavelength.

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, loosing and gaining energy by different phase of water, phases changes.

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

When water particles in their gaseous state (X) lose enough energy, then the gaseous state of water converts to liquid state as the kinetic energy of particles decreases. When water particles in their liquid state (Y) gain enough energy, then water converts to vapor state.

Therefore,  loosing and gaining energy by different phase of water, phases changes.

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Answer:

chemical energy tell me if i right

Answer: Elastic potential energy

Explanation:

Answer:

D

Explanation:

The pineal gland regulates salt and water levels.

The pineal gland does not regulate salt and water levels. Therefore, option (D) is correct.

The pineal gland can be described as a pinecone-shaped small gland located in the middle of the human brain. The pineal gland is the main site for melatonin secretion, which regulates the internal clock of the body.

The dimensions of the pineal gland can be described as about 0.3 inches long and weighing 0.1 grams. The pineal gland is made of pinealocytes and supporting cells that are similar to the astrocytes in the brain.

The pineal gland secretes the hormone melatonin and this hormone regulates the circadian rhythm of the body and also reproductive hormones. The secretion of hormones depends upon the quantity of light a person is exposed to.

This hormone is formed in huge amounts when it is dark. The presence of light prevents the secretion of melatonin which controls circadian rhythms.

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Answer:

i)   0.5071 (kg/s)

ii)  -1407.1 kj/kg

iii)  204.05 Kw

iv)  5.881

v)    9.238

Explanation:

Given Data:

evaporation temperature ( T ) = 4°c = 277.15 K

Condensation Temperature ( T ) = 34°c = 307.15 K

n ( compressor efficiency ) = 0.76

refrigeration rate = 1200 kJ.s^-1

i) determine the circulation rate of the refrigerant

m = [tex]\frac{Q}{H2 - H1}[/tex]  = [tex]\frac{Q}{H2 - H4\\}[/tex]  ------- 1

Q = 1200 Kj.s^-1

H2 = entropy at step 2 = 2508.9 (kJ / kg ) ( gotten from Table F )

H4 = entropy at step 4 = 142.4 ( kJ/ kg )

back to equation 1

m ( circulation rate of refrigerant ) = 0.5071 (kg/s)

ii) heat transfer rate in the condenser

Q = m ( H4 - H3 )

    = 0.5071 ( 142.4 - 2911.27 )

    = -1407.1 kj/kg

where H3 = H2 + ΔH23 = 2911.27 (kj/kg) ( as calculated )

iii) power requirement

w = m * ΔH23

   = 0.5071 (kg/s) * 402.37 (kj/kg) =  204.05 Kw

where: ΔH23 = [tex]\frac{H'3 - H2 }{0.76}[/tex] = [tex]\frac{2814.7-2508.9}{0.76}[/tex] = 402.37 (kj/kg)

iv) coefficient of performance of a cycle

W = Qc / w

  = 1200 Kj.s^-1/ 204.05 kw

  = 5.881

v) coefficient of performance of a Carnot refrigeration cycle

[tex]w_{carnot} = \frac{T2}{T4 - T2}[/tex]

            =  277.15 / ( 307.15 - 277.15 )

            = 9.238

Answer:

b. organs

Explanation:

molecules combine to form cells, cells combine to form tissues, tissues combine to form organs, organs combine to form organ systems, and organ systems combine to form organisms.

Answer:

B. Organs

Explanation:

Cell - Tissue - Organs - Organ Systems - Organism

Answer:

In the desert, the climate is hot and dry, while in the tundra, it is cold and wet.

Explanation:

in the desert, plants need more water, while in the tundra, they have ice and snow

Answer:

A. atomic number

Explanation:

An atomic number of the elements increases as you move across a period from left to right. Hence, option A is correct.

An atomic number is the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing the number of protons in the nucleus.

In a period atomic number increases as we move from left to right but the outermost shell remains the same. Hence it's only the number of protons increasing in the nucleus as we from left to right, the effect of the nucleus increases on the outermost shell hence atomic size decreases in a period.

Hence, The atomic number of the elements increases as you move across a period from left to right.

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Answer:

See attached picture.

Explanation:

Hello.

In this case, since butane has two common occurring structures, n-butane and isobutane, there is a way in which the tert-butyl radical can be formed upon the removal of a hydrogen from the isobutane form of butane as shown on the attached picture, wherein you can see that the radical is named by "tert" since the central carbon is bonded to three carbon atoms, that is why we classify it as tertiary. Moreover, it is a radical due to the presence of the bolded dot next to the tertiary carbon suggesting that it is very likely to bond with an other atom.

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Answer:

2.7 kg/L

Explanation:

Step 1: Given data

Density of aluminum (d): 2.7 g/cm³

Step 2: Convert "d" for g/cm³ to kg/cm³

We will use the conversion factor 1 kg = 10³ g.

2.7 g/cm³ × (1 kg / 10³ g) = 2.7 × 10⁻³ kg/cm³

Step 3: Convert "d" from kg/cm³ to kg/L

We will use the conversion factor 1 L = 10³ cm³.

2.7 × 10⁻³ kg/cm³ × (10³ cm³/ 1 L) = 2.7 kg/L

Answer:

She is viewed differently by different people. Of course the beast is in love with her. Gaston is in love with her as well but in a more objectifying way. Her village thinks she's odd and different, and her Belle is her father's hero.

Explanation:

The question is incomplete; the complete quqestion is ;

iv. What happens to [CO2] when the H2O is added?

a. increased

b. decreased

c. no change

Answer:

decreased

Explanation:

Recall that the reaction shown in the question is endothermic (positive change in enthalpy).

When water is added to the system, carbonic acid is formed  as follows;

CO2(g) + H2O(l) ---> H2CO3(aq)

This reaction is decreases the concentration of the carbon IV oxide as it dissolves in the water.

Answer:D Diffusion

Explanation:

Because the the cell Is letting it go diffuse it to remove it.

Answer:

of different elements with different electronegativities

Explanation:

A molecule containing two atoms "of different elements with different electronegativities"

A polar covalent bond exists when two different atoms (non-metals) with different electronegativities are able to share their electrons in a covalent bond.

Some examples of polar covalent bonds are seen in:

1. Ammonia(NH3): The polar covalent bonds exists between the nitrogen and hydrogen atoms.

2. Water(H2O): The polar covalent bond exists between hydrogen and oxygen. The oxygen molecule has a net negative charge while the hydrogen atoms have a net positive charge.

Answer:

25 grams

Explanation:

10 +15 =25 you welcome

Answer:

E: None of the Above

Explanation:

Answer:

14g of Y to form the compound XY₂

Explanation:

In the compound XY, you have 1 mole of X and 1 mole of Y. Thus, you can imagine the molar mass of X is 2g/mol and molar mass of Y is 7g/mol.

Now, in the compound XY₂, you have 1 mole of X but 2 moles of Y.

If you have 2g of X, in this case you will need:

2 moles Y * (7g / mol) =

14g of Y to form the compound XY₂

The amount of element Y needed to form compound XY2 is; 14g of element Y.

From the law of conservation of mass which states that;

Matter can never be created nor destroyed.

By stoichiometry;

Since:

7 g of element Y to form compound XY(y =1)

a g of element Y to form compound XY2(y =2)

In essence,

a g = (2 × 7g)/1

a = 14g

Therefore, 14g of element Y is needed to form compound XY2.

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Answer:

You would be looking at indium, Which is 114.818

Explanation:

Answer:

Explanation:

Symbol: K

Protons = 19

Electrons in an atom: 19

Neutrons: 39 - 19 = 20

Draw the nucleus at the center. Label it with 19 Protons and 20 Neutrons.

Draw a circle around the nucleus.

Put two dots opposite each other on the circle's circumference.

Draw another circle with its center at the nucleus bigger than you first circle.

Space 8 electrons around the circumference.

Draw a third circle like the other 2 only bigger.

Space 8 electrons around this circle's circumference.

Draw 1 more circle bigger than the third circle.

It has 1 electron.

Answer:

Metalloids tend to be shiny like metals but brittle like nonmetals. Because they are brittle, they may chip like glass or crumble to a powder if struck. Other physical properties of metalloids are more variable, including their boiling and melting points, although all metalloids exist as solids at room temperature.

Explanation:

Answer:

You're right Transition Metal