6. A(n) is a material made of two or more metals.
O molecular compound
O alloy
ionic compound
O mineral

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:

they spread out waiting until each orbital has one electron before doubling up (the last bullet point)

Explanation:

This is because electrons are negatively charged so if they doubled up together in the begging, they would repel each other.  

Answer:

a nucles

b electron cloud

Explanation:

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.

Learn more of alkaline metals:https://brainly.com/question/11857448

#SPJ1

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

To know more about Molality here :

https://brainly.com/question/26921570?referrer=searchResults

#SPJ4

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.

Learn more about polystyrene:https://brainly.com/question/912173

#SPJ1

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.

Read more about Physical property here brainly.com/question/12330204

The density of the sample of glass with a mass of 37.4 g and a volume of 15.2 mL is - 2.460 g/ml.

The density of a body is defined as ratio of mass per unit volume. Mathematically -

ρ = M/V

M - mass of substance

ρ - density of substance.

V - volume of substance

Given is a sample of glass with a mass of 37.4 g and a volume of 15.2 mL.

From this, we can write -

Mass of glass [M] = 37.4 g

Volume of glass [V] = 15.2 ml

According to the question -

The ratio of mass per unit volume is -

ρ = M/V

Substitute the values of mass and volume, we get -

ρ = 37.4 / 15.2 ml = 2.460 g/cm³.

Hence, the density of the sample of glass with a mass of 37.4 g and a volume of 15.2 mL is - 2.460 g/ml.

To solve more questions on Mass - Density relation, visit the link below-

brainly.com/question/28348989

#SPJ1

By ideal gas approximation, the molecular weight of the polymer sample is 861471.83 gram.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (0.0821 atm.L/mol.K) and T is temperature.

From the question above, we know that

ρ = 25 g/L

P = 0.54 torr = 0.00071 atm

T = 25⁰ C = 298 K

We can change the number of moles to density form

P . V = n . R . T

P . V = gr/Mr . R . T

Mr = ρ  . R . T / P

Mr = 25 . 0.0821 . 298 / 0.00071

Mr = 861471.83 gram

Find more on ideal gas at: https://brainly.com/question/25290815

#SPJ4

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.

Learn more about sulphanilamide

https://brainly.com/question/8314697

#SPJ4

The yellowish-green powder is a compound because two elements (iron and bromine) chemically combined to form it.

A compound in chemistry is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

This means that a compound is formed by the chemical bonding of two or more elements.

According to this question, a grey-coloured iron powder was heated in reddish-brown bromine vapour to form a yellowish-green powder.

The grey-coloured iron is an element that combined with the reddish-brown bromine gas. This suggests that two elements combined. It can be said to be a chemical reaction because a colour change was observed.

Therefore, the yellowish-green powder is a compound because two elements (iron and bromine) chemically combined to form it.

Learn more about compounds at: https://brainly.com/question/13516179

#SPJ1

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%

To learn more about weight percent refer to

https://brainly.com/question/24419453

#SPJ4

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%.

To know more about the yield percentage, visit the given link:

https://brainly.com/question/22257659

#SPJ4

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: Sulfuric acid

Explanation: Sulfuric acid is a colorless oily liquid. It is soluble in water with release of heat. It is corrosive to metals and tissue.

Answer:

The correct option is;

a. The particles will gain a large amount of kinetic energy

Explanation:

As the water temperature reaches 100°C, which is the boiling point for water at atmospheric pressure, the continued heating is then used to break up the strong inter molecular forces between molecules of the water  such that the individual molecules are free to move about and due to the high temperature, have gained considerable amount of kinetic energy for the to rise to appreciable height and to also spread.

The heat which converts water into steam is called latent heat as during the boiling phase, the temperature of the water remains constant.

Answer:d

Explanation:

Answer: BRO ONLY 5 POINTS RU MAD?

Explanation: FRGG G TRHGTHTFRH   FHTYHRDSHYRSYH

If a sample of He gas and O₂ have the same temperature, pressure, and volume then He gas will have more collisions.

This is because the He gas has less molecular mass then the oxygen gas and hence it can move more easily than oxygen thus will collide more with the walls of the container while being on the same temperature, pressure and volume as the oxygen gas. because of its low molecular mass it moves with the high average velocity than the oxygen gas and hence  the rate of its collision with the walls of the container ins more.

Thus the He gas will have more number of collisions then the Oxygen gas while having same temperature, pressure and volume.

To learn more about collisions visit the link:

https://brainly.com/question/24101281?referrer=searchResults

#SPJ4

Stanley miller's spark - discharge experiment demonstrated simple molecules can react to form Organic molecules under the conditions of earth's early atmosphere.

The Stanley miller in 1953, performed a experiment to describe the origin of life on earth. The mixture of methane , water, hydrogen and ammonia , which were found in early earth's atmosphere. these mixture were sealed in inside a test tubes. and flasks connected together in a loop. one flask is half filled with water and another one contains electrode. gases were circulated around apparatus imitating the earth's atmosphere.

The electrodes were used to spark fire to imitate light and storm through vapor. vapours were cooled and come back to first flask in continuous cycle. After a week he found  amino acid and other organic compounds as a result of this experiment.

Hence, Stanley miller's spark - discharge experiment demonstrated simple molecules can react to form Organic molecules under the conditions of earth's early atmosphere.

To learn more about Stanley miller's experiment here

https://brainly.com/question/28235998

#SPJ4

The mass of the ethanol + graduated cylinder would be 90.33 g.

Density of 20 ml ethanol is = 0.789 g/ml

As we know that density = mass UPON volume

so mass = density * volume

mass = 0.789 g/ml * 20 ml

mass = 15.78 g

If we try to get the volume of water in the experiment it will be 8.9 ml

Mass of graduated cylinder = 29.13 g

Mass of cylinder and mass = 36.33 g

If we combine all the masses we'll get 90.33 g.

Hence, the answer is 90.33 g.

To know more about Graduated cylinder here :

https://brainly.com/question/14427988?referrer=searchResults

#SPJ4

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

To know more about diluted solution here

https://brainly.com/question/26299467

#SPJ1

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.

To know more about intelligence visit:

https://brainly.com/question/9944825

#SPJ9

The answer would be for this question is density = 1.95 g ml^-1.

Density is defined as the mass upon volume.

It is denoted by D.

Its unit is g/cm^3.

According to question,

Given,

Mass of an empty beaker = 4.995 g

Mass of unknown acid solution = 2.00 ml

Total or combined mass of the beaker = 9.893 g

To find density of the acid solution.

Calculation -

As you know the mass of empty beaker also the mass of the beaker increases after adding acid solution so,

Mass = 9.893 g - 4.995 g = 4.898 g

As the mass of an acid already mentioned only you need to get the value of the volume,

1 ml * 4.898 g / 2.0 ml = 2.449 g

Now the density of the acid solution is 1.95 g ml^-1.

To know more about density here :

https://brainly.com/question/15164682?referrer=searchResults

#SPJ4

Answer:

B. The rate of mitosis is much greater than the rate of apoptosis

I believe that the wind power is more than they make it out to be. The most powerful and best is hydraulic and natural gas.

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.

To know more about ionization energy visit:

https://brainly.com/question/6842791

#SPJ1

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:

Learn more about atomic number at: https://brainly.com/question/16858932

#SPJ1

According to the linear model of mass communication, an advertisement for cereal is an example of a message.

The process of developing, sending, receiving, and analyzing messages for large audiences through spoken and written media is known as mass communication (or communications). It is a broad field that takes into account both the means by which a communication is created and its intended audience. These media span a variety of platforms and include print, social media, digital and Internet media, radio, and television. Strategic communication, health communication, political communication, integrated marketing communications, journalism, and other related professions are all included in the multidisciplinary aspect of mass communication.

There are various bachelor's and master's in mass communication programs provided by colleges and universities across the country for those who are interested in working in public communication or studying it as a topic of study.

The development, dissemination, and evaluation of effective communications aimed at sizable audiences is the domain of mass communication specialists who are knowledgeable in rhetorical principles and strategic media tactics.

Every day, mass communication strategies are used by public relations specialists, journalists, broadcast professionals, advertisers and marketers, content writers, graphic designers and illustrators, public health educators, corporate media managers, and other media professionals to create and implement strategic communication plans — from broadcast news to online marketing campaigns and public health announcements — across almost every industry.

To know more about mass communication visit: https://brainly.com/question/16819715

#SPJ1

The work function of the metal is 5.2 * 10^-19 J while the number of electrons is 2.3 * 10^12 electrons.

From the photoelectric theory of Einstein, electrons are emitted when light of appropriate wavelength is incident on a clean metal surface. The minimum energy that the incident light must possess is called the  work function of the metal.

We know that;

Kinetic energy = Energy of incident photon - Work function

Energy of incident photon = hf = 6.6 * 10^-34 Js * 1.34×10^15 s−1

= 8.8 * 10^-19 J

Work function = Energy of incident photon - Kinetic energy

Work function = 8.8 * 10^-19 J - 3.60×10^−19 J

Work function = 5.2 * 10^-19 J

Now;

The total energy = 3.67×10−7 J

Hence;

3.67×10−7 J = n * 1.6 * 10^-19 J

n = 3.67×10−7 J/1.6 * 10^-19 J

n = 2.3 * 10^12 electrons

Learn more about work function:https://brainly.com/question/12658742

#SPJ1

The best scientific theories not only explain and organize known facts but also (a) generate new prediction.

A scientific theory is made by performing various experiments to verify the observation made. A scientific theory is made by observing something, making hypothesis and testing that hypothesis using experiments and then coming to a conclusion. If the hypothesis made is proved wrong then a new hypothesis is made. And the process is repeated again.

A theory that is accepted now can be proved wrong in the near future. Or one can say that theory not necessarily be applicable in every situation.

The hypothesis that are made are nothing but generation of new predictions.

To know more about scientific theories here

https://brainly.com/question/2375277?

#SPJ1