Answer the next five questions based on the diagram:

How many electrons are in the n = 1 shell?
4 , 14 , 6 , 5 , 2 , 3
How many electrons are in the n = 2 shell?
4 , 14 , 6 , 5 , 2 , 3
How many electrons are needed to complete the n = 2 shell?
4 , 14 , 6 , 5 , 2 , 3
How many electrons are being shared between the two nitrogen atoms?
4 , 14 , 6 , 5 , 2 , 3
How many bonds exist between the two nitrogen atoms?
4 , 14 , 6 , 5 , 2 , 3

The change that is likely to occur is that :

The temperature will decrease and humidity will increase.

Continental Polar air masses are air masses that are cold and dry due to their continental source region.

When a continental polar air mass moves into an area, the following will happen:

Continental air masses are characterized by dry air near the surface while maritime air masses are moist.

Continental polar air masses are also characterized by cold, dry, and stable but they are not as cold as the artic air masses.

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An 8.638.63 g sample of calcium sulfide was decomposed into its constituent elements and the statement is that every sample of calcium sulfide will have 44.4% mass of sulfur.

According to the law of definite proportions, which is also known as the law of constant composition, pure compound samples always contain the same elements in the same mass proportion.

Stoichiometry in chemistry is also based on this concept and also the law of multiple proportions.

Every sample of a given chemical composition will consist of the same elements in the same combination or ratio.

It is given that,

an 8.638g sample was decomposed into its constituents.

It is producing a total of 4.804g calcium and 3.833g of sulfur.

The mass ratio of Ca: s = 4.804/3.833

=1.253

⇒ mass of calcium = 40.078

mass of sulfur = 32.068

Total mass of CaS = 72.146 grams

mass percentage of Ca = 40.078/72.146 x 100

=55.56%

mass percentage of S = 32.068/72.146 x 100

=44.44%

Thus, in each kind of sample the mass percentage of calcium along with sulfur in every sample is equal to 100%.

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Complete Question

A 8.63 gg sample of calcium sulfide was decomposed into its constituent elements, producing 4.804 g of calcium and 3.833 g of sulfur.

Which of the statements are consistent with the law of constant composition (definite proportions)?

A) Every sample of calcium sulfide will have 3.36 g of calcium.

B) The mass ratio of Sto Ca in every sample of calcium sulfde is 0.80.

C) The ratio of calcium to sulfur will vary based on how the sample was prepared.

D) Every sample of calcium sulfide will have 44.4% mass of sulfur.

E) The mass percentage of calcium plus the mass percentage of sulfur in every sample of calcium sulfide equals 100%.

Polystyrene is produced from by addition polymerization for styrene monomers as shown in the image attached to this answer.

A polymer is a substance that is formed by the joining together of several smaller molecules. We know that polymers are composed of smaller molecules called the monomers. The monomers are the singe units that could be joined together when we are trying to obtain a polymer. Monomers could have a very short chain in themselves. The chemical composition of the monomer is what determines the sort of polymer that it could form.

We can see in the image attached, both the structure of the  styrene monomer and that of the polystyrene polymer. Thee polymer if formed by addition  and occurs by the mechanism of free radical polymerization. This means that the initiator of the polymerization must be a free radical.

Polystyrene is used in materials such as disposable cutlery , compact disk plates and plastic frames.

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If you omit baking soda from the recipe, the product's texture isn't as light and fluffy, it is because baking soda is a salt that rises the dish.

Baking soda is sodium bicarbonate, and it is the bicarbonate of soda. It is a salt of sodium and bicarbonate. Its chemical formula is NaHCO3.

It is used as an antacid, and it is also used in baking dishes, such as cakes, biscuits, etc. Baking soda is sued in baking because it rises the cakes and makes it fluffy and soft.

Thus, not using baking soda will make the dishes hard and the dish will not rise.

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The grams of oxygen present in a sample of this compound that contains 56.00 grams of S = 41.9g of oxygen.

The compound contains the following:

Sulphur = 57.20%

Oxygen = 100 - 57.20 = 42.80%

If 57.20% of the sample contains 56g of Sulphur, then 42.80% of the sample will contain X.

Make X the subject of formula,

X = 42.8 × 56/57.20

X= 1712/57.20

X= 41.9g of oxygen

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Answer:

a) 4

b) 3

c) 1

d) 3

e) 4

f) 0
g) 5

h) 3

i) 3

j) 4

50 students has 2.

Hope that helps

Answer:

maby all of them vote from I'll pay get did you

The independent variable is simply given as type of kitchen cleaner. Option B

This is further explained below.

Generally, The definition of an independent variable is precisely the same as its name.

It is a variable that is independent of the other factors that you are attempting to measure and does not change as a result of those variables.

For instance, the age of a person may be considered an independent variable.

In conclusion, The kind of kitchen cleaner is the only information provided for the independent variable. Alternative B

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CQ

Michael wanted to see what kitchen cleaner worked best for cleaning her counters. He used Lysol, Clorox, Pinesol, and just water. For each cleaner, he put 5 milliliters of grape juice on the counter, sprayed the cleaner, and wiped with one paper towel. What is the independent variable?

answer choices

amount of grape juice

type of kitchen cleaner

how well the grape juice stain was removed from the counters

the time it took to clean the counter top

Answer:

Explanation:

The formula for finding the volume of an object given it's mass and density is given by

[tex]volume = \frac{mass}{density} \\ [/tex]

From the question

mass = 1.2 × 10³ grams

density = 0.53 g/cm³

We have

[tex]volume = \frac{1.2 \times {10}^{3} }{0.53} = 2264.1509\\ [/tex]

We have the final answer as

2264.15 cm³

Hope this helps you

The volume of the palladium is 103.3 cubic centimeters.

We know that;

1 ounce = 28.35 grams

44.1 ounces = 44.1 ounces * 28.35 grams/1 ounce

                    = 1250.23 g

Density = mass/volume

volume = mass/Density

volume = 1250.23 g/12.1 g/cm3

volume = 103.3 cubic centimeters

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The palladium has a volume of 103.3 cubic millimeters.

A substance's density is determined by how much mass or amount there is per unit of volume.

Mass divided by volume is the formula for density.

On the periodic table, density varies from element to element and is influenced by external factors like temperature and atmospheric pressure.

1 pound equals 28.35 grams.

1 ounce = 28.35 grams, thus 44.10 ounces equals 1250.23 grams.

Mass/volume = Density.

Volume = Mass / Density.

For example, volume = 1250.23 g times or 12.1 g per cubic centimeter.

Volume = 103.3 cubic centimeters

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The answer of the resulting Freezing point of the solution is 123.87 g

Molality is a measure of the number of intelligence of solute in a result corresponding to 1 kg or 1000 g of detergent.

This contrast with the description of molarity which grounded on a specified volume of result.

A generally used unit for molality in chemistry is mol / kg.

Now,

Molar mass of an unknown solid = ?

ΔTf = kf * molality for finding molality

Molality = moles / kg solvent

Moles = grams / molar mass

Mass of solute mixed in cyclohexane = 0.4 × 609

Solute mixed in cyclohexane and mixed in cycloheptene= 0.4² × 1000 / 36 π

ΔTf = kf * molality

ΔTf = 2.0920 × 0.4 × 1004 ÷36 × 0.09

M = 9320 / 73.29

M = 123.87 g

Molar mass of unknown solvent = 123.87 g

The Freezing point of the resulting solution is 123.87 g and hence the answer is 123.87 g

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Water is highly cohesive. Its molecules tend to resist increases in their motion.

When water is heated, some of the energy is used to disturb the hydrogen bonds between neighboring molecules.

Water is abundant. Large bodies of water resist changes in their temperature simply because they are massive objects.

Water is highly cohesive. Its molecules tend to resist increases in their motion.

Due to its extreme density, water can absorb a lot of heat with only a small change in temperature, much like all other dense materials.

Water is very sticky. If water is bonded to another substance, the molecules will tend to "stay put" and resist increases in motion.

Pure water does not resist temperature change.

The hydrogen bonds between water molecules give water the ability to hold heat better than many other substances.

As the temperature rises, the hydrogen bonds between water continually break and reform, allowing for the overall temperature to remain stable, although increased energy is added to the system.

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Relative to other substances, water tends to resist changes in temperature because it's highly cohesive.

The linguistic concept of cohesion describes the way that a sentence's or a text's structure and content are connected to produce meaning.

The gravitational force that draws molecules of a given material together.

Solids, it is the most powerful, followed by liquids and gases, which are less powerful.

The interactions of water molecules with one another and with other objects, such as leaves or even you, are described by the two water properties of cohesion and adhesion.

Both cohesion and adhesion refer to how much water prefers to attach to itself and other objects.

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The mass (in grams) of water, H₂O present in 55.89g of CoCl•6H₂O is 29.82 g

We can obtain the mass of water in 55.89 g of CoCl•6H₂O as illustrated below:

Mass of water = (6H₂O / CoCl•6H₂O) × total mass

Mass of water = [(6 × 18) / 202.4] × 55.89

Mass of water = [108 / 202.4] × 55.89

Mass of water = 29.82 g

From the calculation made above, we can conclude that the mass of water in the 55.89 g of CoCl•6H₂O is 29.82 g

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Answer: I assume you mean the atomic number.

The atomic number would be 31.

If we have 100.0 ml of a dye and transfer 2.00 ml of the solution to a 100.00 ml volumetric flask and after adding water to the 100.00 ml mark, we take 5.00 ml of the solution and again dilute it 100.00 ml such that the dye concentration in the final diluted solution is 0.000158 M, then the dye concentration in the original solution is 0.158 M.

When 5 ml of the solution was taken in that stage the number of moles of dye present in the solution at that time is same after diluting it with water to a volume of 100 ml.

So, Number of moles of dye in 5 ml = number of moles in final dilution

Molarity of dye in 5 ml  x Volume of solution  =  Molarity in final dilution x final volume

M x  5ml = 0.000158 x 100

M = (0.000158 x 100)/ 5

   =   0.0158/5 = 0.00316 M

Now, the number of moles present in 2 ml of the sample = number of moles on diluting it 100 ml.

Molarity of dye in 2 ml x Volume = molarity on diluting it x volume on diluting it

M x 2 ml = 0.00316 x 100

M = (0.00316 x 100)/2

  = 0.158 M

Molarity of initial solution = molarity of 2 ml f the solution

                                          = 0.158 M

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Answer:

online it says .115km equals 11500cm

A major unifying concept in biology is evolution. "Nothing in biology makes sense except in the light of evolution," Theodosius Dobzhansky once said.

Numerous branches of biology provide proof of evolution:

Anatomy:  Because a physical characteristic was present in the following common ancestor, species may have similar physical characteristics (homologous structures).

the study of molecules. The genetic code and DNA show how life has a common ancestor. Comparing species' DNA can reveal how closely related they are.

Biogeography :  Evolution and geological change are reflected in the global distribution of creatures as well as the distinctive characteristics of island species.

Fossils : The existence of species that are related to modern species but are now extinct is documented through fossils.

Direct perception: in creatures with brief life cycles, small-scale evolution can be seen directly (e.g., pesticide-resistant insects).

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The success of ELIZA and PARRY reveal is Humans attribute intelligence to things that are not actually intelligent.

There are various ways to describe intelligence, including higher level skills (including abstract reasoning, mental modeling, decision-making, and problem-solving), the capacity for learning, emotional intelligence, creative thinking, and environment-appropriate adaptation. Because creativity goes beyond knowledge recall and includes knowledge invention, it is the ultimate type of intellect.

Gardner proposes that people have multiple types of intelligence, including musical, interpersonal, spatial-visual, and linguistic intelligences, to fully account for the diversity of skills and talents that people possess.

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The noble gases family on the periodic table has the highest effective nuclear charge as compared to other groups in the periodic table.

A higher effective nuclear charge leads to greater attractions to the electrons which results in pulling of electron closer to the nucleus which causes in a smaller atomic radius of the atom. When we move down the group, the number of shells or orbits increases, so there is a greater distance between the nucleus and the outermost shell. Effective nuclear charge increases when we move from left to right in the periodic table due to the increasing of atomic charge and shielding effect. Due of a same number of shielding electrons across a period, the valence electrons are pulled more strongly by the protons present in the nucleus. Effective nuclear charge increases when we move from left to right in the periodic table while on the other hand, effective nuclear charge decreases down the group in the periodic table.

So we can conclude that the noble gases family on the periodic table has the highest effective nuclear charge as compared to other groups in the periodic table.

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The order Francium, Barium, Arsenic, Bromine is ordered from lowest to highest first ionization energy as per their individual ionization energies.

Across the periodic table, the first ionization energy fluctuates in a predictable manner. In groups, the ionization energy drops while rising from left to right during the course of a period.

Helium on the periodic table thus has the highest first ionization energy, whereas francium has one of the lowest.

Alkali metals have the lowest initial ionization energies because when one electron’s outermost shell is removed, they acquire a stable configuration.

Due to its desire to absorb electrons and lack of tendency to lose them from its valence, fluorine has the highest initial ionization energy.

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The number of avocados in an average selection of 12 crates is 500 avocadoes.

The total number of avocadoes in the truck is determined from the correct insurance value f the avocadoes.

The total number of avocadoes in the truck is calculated as follows:

Weight of one avocado = 0.4 pound

Value of avocado per pound = $0.30

Value of one avocado = $0.30 * 0.4

Value of one avocado = $0.12

Value of one crate of avocado = $2000/400

Value of one crate of avocado = $5

Number of avocadoes per crate = 5/0.12 41 avocadoes

Number of avocados in an average selection of 12 crates =  5/0.12 * 12

Number of avocados in an average selection of 12 crates = 500 avocadoes

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3.57 ml of 95% ethyl alcohol will be required to dissolve 0.75 g sulphanilamide at 78 degrees Celsius.

Lets convert sulphanilamide into mg

m(sulphanilamide) = 0.75 g

                               = 0.75 × 1000

                               = 750 mg.

We know that,

210 mg : 1 ml = 750 mg : V(ethyl alcohol).

By simplifying

210 mg × V(ethyl alcohol) = 750 ml × mg.

V(ethyl alcohol) = 3.57 ml

Thus, 3.57 ml of 95% ethyl alcohol will be required.

Sulfanilamide is a sulfonamide antibacterial medication that can also be spelt as sulphanilamide. It is an organic compound made composed of an aniline that has been sulfonamide-derivatized. In World War II, the Allies utilized powdered sulfanilamide to lower infection rates, which also helped to significantly lower mortality rates than in earlier conflicts.

Due to its toxicity and the availability of more potent sulfonamides for this function, sulfanilamide is seldom ever administered systemically. Sulfanilamide has been replaced by modern antibiotics on the battlefield, but it is still used today in topical formulations, primarily for treating vulvovaginitis, a vaginal yeast infection caused by Candida albicans.

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The respective atomic number, mass number, protons, electrons and neutrons of the following atoms are as follows:

The atomic number of an element is the number of protons in the atom of that element. In a neutral atom, the number of protons is same as the number of electrons.

However, the mass number is the sum of the number of protons and neutrons in the atom.

This means that we can get the number of neutrons in an atom of an element by subtracting the number of protons/atomic number from the mass number.

Therefore, based on the above explanation, the respective atomic number, mass number, protons, electrons and neutrons of the following atoms are as follows:

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Metals on reaction with acids liberate Hydrogen gas. This is the reason why bubbles are formed in the solution.

When the metals reacts with acids the mass of the metal will decreases with the liberation of hydrogen gas . This can acts as a exception for law of conservation of mass.

The law of conservation of mass determines  that in a chemical reaction mass can  neither  be created nor destroyed. For instance , the carbon atom in coal as carbon dioxide when it is burned. The carbon atom transforms  from a solid structure to a gas but its mass doesn't  changes.

The principle states  that the mass of matter, in a closed system, will always be the same no matter what type of change  can happens to the matter. Whether it's a change in state, or dissolving, or a chemical reaction, or any combination , the amount of mass will not be   change.

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The alkaline earth metals are highly reactive and do not exist free in nature.

The alkaline earth metals are the metals that are found in group two of the periodic table. They are the elements that have two electrons on their outermost shell. They are highly electropositive and as such, they do not exists as being free in nature.

We can see that the outermost electron configuration of the alkali earth metals is obtained as ns^2. This shows the fact that they are divalent and they also form divalent positive ions.

The alkaline earth metals only form ionic compounds in which they exists as the cation in the compound.

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66.66% is the concentration in weight percent.

Steps of the calculation:

weight percent =  [tex]\frac{ mass of solute}{ mass of the solution}[/tex]× 100

                       = [tex]\frac{6.000}{9.000}[/tex] × 100

                       = 0.666×100

weight percent = 66.66%

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Answer:

aluminum has 3 energy levels and 3 valance electrons

The percentage yield of ammonium chloride of 0.81 g of N[tex]H_{4}[/tex]Cl is formed when 0.75 g of N[tex]H_{3}[/tex] is reacted with 0.6 g HCl is 89%.

How do we calculate the yield percentage of any substance?

The weight of the product that was produced compared to the theoretical yield is known as the percent yield in chemistry. In order to express the result in percent, we divide the experimental yield by the theoretical yield and multiply the result by 100.

 Given that,

    N[tex]H_{3}[/tex](g) + HCl(g) = N[tex]H_{4}[/tex]Cl ,

    0.81 g N[tex]H_{4}[/tex]Cl,

    0.75 g of N[tex]H_{3}[/tex],

    0.6 g of HCl,

    % of N[tex]H_{4}[/tex]Cl = ?

Molar mass of N[tex]H_{3}[/tex] = 14 + (1×3) = 17 g/mol (since N = 14, H =1)

Molar mass of HCl = 35.5 + 1 = 36.5 g/mol (since H=1, Cl=35.5)

Molar mass of N[tex]H_{4}[/tex]Cl = 14×4 + 35.5 = 53.5 g/mol

    Mole of N[tex]H_{3}[/tex] = 0.75/17 = 0.0441 mol

     Mole of HCl = 0.62/36.5 = 0.0169 mol

Therefore 0.0169 mol of N[tex]H_{4}[/tex]Cl will be formed since limiting reactant is HCl.

      1 mol N[tex]H_{4}[/tex]Cl = 53.5 g

       0.0169 mol N[tex]H_{4}[/tex]Cl = (53.5×0.0169)g

                                      = 0.904 g

Percentage yield of N[tex]H_{4}[/tex]Cl = (N[tex]H_{4}[/tex]Cl formed / Theoretical N[tex]H_{4}[/tex]Cl      product)× 100

           = (0.81/0.904)×100

           = 89.6%

Therefore, the yield percentage of N[tex]H_{4}[/tex]Cl is 89%.

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The complete question is :

“Ammonia Reacts With Hydrogen Chloride In The Gas Phase To Produce The Ionic Compound Ammonium Chloride Via The Reaction NH3(G) + HCl(G) ➔ NH4Cl(S). What Is The Percent Yield Of Ammonium Chloride If 0.81 G Of NH4Cl Is Formed When 0.75 G Of NH3 Is Reacted With 0.62 G HCl? 91% 34% 89% 59%”

Answer: 35/13

Explanation:

If you were given five new substances and were asked to describe them by their physical properties, the following listed below will be looked out for:

Color

Density,

Hardness

Odor etc.

What is Physical property?

This is the type of features of the matter which can be measured without changing the chemical identity of it or the constituents.

Examples of physical properties include color, odor, boiling and melting points etc which are usually often seen or felt by individuals depending on the type of substance. This is therefore the reason why the above parameters will be considered in the case of the physical properties.

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