When gold is hammered it "squishes". Iron Pyrite is
known as "Fool's Gold". It is not..........
like gold,
but shatter into many pieces when struck by a
hammer, Iron Pyrite is..........​

Answer:

I'm pretty sure its condensation The energy absorbed causes the molecules to change patterns. hope i helped

Answer:

it blows up very lighty

Explanation:

Answer:

34.611g

Explanation:

mass of metal = ?

density of metal = 1.39/cm³

volume = 24.9 cm³

density = mass/volume

mass = density × volume

= 1.39g/cm³ × 24.9 cm³

= 34.611g

Answer:

attached below is the detailed solution

answer : value of constant = 2.18 * 10^-18 J

Explanation:

Express the constant in terms of h and c and RH

attached below is the detailed solution

Constant = [tex]h_{C} R_{H}[/tex]

               = ( 6.626 * 10^-34 ) * ( 3 * 10^8 ) * ( 1.097 * 10^7 )

               = 2.18 * 10^-18 J

The Planck equation and the light speed  allow us to find the results for the transformation of the Rydberg equation are:

   [tex]E = A ( \frac{1}{n_1^2}\frac{x}{y} - \frac{1}{n_2^2} )\\A= R_H \ h \ c \\A = 2.18 \ 10^{-18} j[/tex]

The Rydberg equation is an empirical expression that explains the wavelength of the emissions.

          [tex]\frac{1}{\lambda } = R_H ( \frac{1}{n_1^2} - \frac{1}{n_2^2} )[/tex]  

Where λ is the wavelength of the emitted radiation, is the Rydberg constant, n₁ and n₂ are integers with n₁ <n₂

It is asked to write the Rydberg equation  for the energy.

Let's use the Planck relation.

           E = h f

The light speed is related to the wavelength and frequency of radiation.

           c = λ f

Where E is the energy, h the Planck constant, c the speed of light, λ the wavelength and f the frequency.

Let's  substitute.

           E = [tex]\frac{hc}{\lambda}[/tex]  

           [tex]\frac{1}{\lambda} = \frac{E}{hc}[/tex]  

Let's substitute in the Rydberg equation.

          [tex]\frac{E}{hc} = R_H ( \frac{1}{n_1^2} - \frac{1}{n_2^2}) \\E = R_H \ h \ c \ ( \frac{1}{n_1^2} - \frac{1}{n_2^2} )[/tex]

We can write is an constant of the form.

          A = [tex]R_H h c[/tex]

The value of the constant is :          

          A = 1,097 10⁷ 6,626 10⁻³⁴ 3 10⁸

          A = 2.18 10⁻¹⁸ J

In conclusion, using the Planck equation and the light speed we can find the results for the transformation of the Rydberg equation are

        [tex]E = A ( \frac{1}{n_1^2} - \frac{1}{n_2^2} )\\ A = R_H h c\\[/tex]

       A = 2.18 10⁻¹⁸ J

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Answer:

37

Explanation:

because when an element is neutral it contains thesame amount of protons and electrons.

The number of protons in the given neutral atom is 37.

Explanation:

Given:

A neutral atom with 37 electrons

To find:

The number of protons.

Solution:

Number of electrons = 37

The given atom is neutral, which means that an equal number of protons and electrons are present.

Number of protons = 37

The number of protons in the given neutral atom is 37.

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Answer:

True

Explanation:

Greater abundance means there is more of those isotopes, so they contribute to the average number more. The average number is the atomic mass.

Answer:

particle distance

solids are tightly packed

liquids are a little farther apart

and gases are very far

Answer:

B.Michanine

Explanation:

Answer: The answer is a college professor since people in the fourth level of industry create, share, and store information. They do research, give advice, report on events, and keep records. Furthermore, workers in the quaternary include teachers, librarians, accountants, scientists, and reporters, nor do the traits describe coal miners, car machines, and a car factory worker as these are the secondary level since their work involves manufacturing, make sure to study! You got this have a g’day. Again, the answer is C: A college professor.

Explanation:

Answer:500

Explanation:

Answer:

B is the correct answer because bubbling is a sign of chemical reaction and production of a new substance

Answer:

The correct answers are:

does not require a medium to travel through

can be absorbed and transformed into heat

is refracted when it changes direction and speed

Hope this helps, have a great day and stay safe! :) :D :3

Answer:

B,E, and F

Explanation:

does not require a medium to travel through

can be absorbed and transformed into heat

is refracted when it changes direction and speed

TRUST : )

Answer:

I think there would be no differences

Answer:

[tex]ns^2[/tex]

Explanation:

Answer: The first picture

Explanation:

The structure of hydronium ion is correctly represented in  the first structure where there are three hydrogen atoms and one oxygen atom.

An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each other resulting in the formation of ionic bond.

Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.

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Answer:

It's Anglo Saxon.

Explanation:

From the Latin aurum, which stands for Aurora, the dawn goddess, comes the symbol Au. Early humans were aware of and highly valued gold. Gold is a beautiful and valuable metal that has been used for at least 5500 years. The original name for gold is Anglo-Saxon.

The element number 79 for gold is Au. Gold's Latin name, Aurum, or shining morning, and its earlier Greek origins predate the Anglo-Saxon term for it. It is one of the more abundant elements with a higher atomic number and exhibits very little reactivity towards the majority of atmospheric conditions, such as water and air.

Although gold is typically inert, it can react with a substance called aqua-regia. A substance called aqua regia is used to dissolve gold. Nitric and hydrochloric acids are combined to make them. The oxidizing agent will be nitric acid, which will result in the creation of gold ions.

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Answer:

c

Explanation:

Answer:

D (32.7%)

Explanation:

Answer:D (32.7%)

Explanation:

Answer:

B. Internal pressure of the balloon decreased due to lower kinetic energy.

Explanation:

The balloon shrank when moved from the warm room to the cold refrigerator because the internal pressures of the balloon decreased due to lower kinetic energy.

Answer:

Synthesis Reaction

General Formulas and Concepts:

Synthesis Reactions: A + B → AB

Decomposition Reactions: AB → A + B

Single-Replacement Reactions: A + BC → AB + C

Double-Replacement Reactions: AB + CD → AD + BC

Explanation:

Step 1: RxN

3C (s) + 4H₂ (g) → C₃H₈ (s)

Answer:

B.  thermal conductivity

Explanation:

They physical property being tested during the fourth step is the thermal conductivity of the materials.

Thermal conductivity is the ability of a body to transmit heat energy from one place to another.

Chopping a piece of wood

Physical changes are changes affecting the form of a chemical substance but not it's chemical composition.

Answer:

rusting nail: Rusting would only be a physical change if iron molecules remained pure iron throughout the process. Yeah your correct a physical change is anything seen or felt like changing the temperature of water a chemical change can also be seen also like if a iron nail rusts the nails iron atoms were chemically changed by oxygen.

lighting a match: Breaking a match in two pieces is an example of a physical change. Lighting a match and letting is burn is an example of a chemical change. Chemical reactions cause chemical changes. In a chemical reaction two or more substances, called the reactants, form different substances called products.

burning a piece of paper: Burning of paper is not a physical change. It is chemical change as ash is formed in the process which is new compound and oxides of carbon are also released during the process. By the definition of chemical change, we come to know that during chemical change a new substance must form. These changes are irreversible in nature.

chopping a piece of wood: The chopping of wood is a physical change because as stated previously, any physical change can include cutting, bending, sharpening, etc. When a piece of wood is being cut, it undergoes one of these processes. The chopping of wood doesn't alter the chemical structure of the actual wood.

So Its chopping piece of wood!

Answer:

690 g IrI₃

Explanation:

To convert from moles to grams, you have to use the molar mass of the compound. The molar mass of IrI₃ is 572.92 g/mol. You use this as the unit converter in this equation:

[tex]1.2molIrI3 * \frac{572.92g}{1mol} = 687.504 g IrI3[/tex]

Round to the lowest number of significant figures which is 2 to get 690 g IrI₃.

Answer:

Double Displacement Reaction

Explanation:

A double displacement reaction is a type of chemical reaction in which the reactant ions exchange places to form new products. Usually, a double displacement reaction results in precipitate formation.

Answer:

This is a synthesis reaction.

Explanation:

Two elements are bonded together to form (synthesize) a new compound.

Answer:

ummmmmmmmmmmmmmmm..mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

Explanation:

ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm.................... candyunicorns1999 has left the chat

Answer:

Bi

Explanation:

Answer:

1.1 x [tex]10^{9}[/tex] km/h

Explanation:

Here we need to do two conversions- one from centimetres to kilometres and one from seconds to hours.

To get from cm to km- we divide by 100 000 since there are 100 000 cm in a km.

To get from seconds to hours we divide by 3600 since there are 3600 seconds in an hour

[tex]\frac{3*10^{10}cm/100000 }{1second/3600} =1.1*10^{9} km/h[/tex]

Answer: she should‘ve called the teacher over to deal with it because she could have gotten cut and the chemical could’ve been dangerous

Explanation:

Answer:

C₂H₃O₂

Explanation:

Given the relative formula mass = 59g/mol

Unknown:

Molecular formula of the compound

Solution:

To identify this compound, let us find the molecular mass of the choices given.

The one that tallies with the number 59 is the solution:

For;

  C₂H₃O₂;

 Atomic mass of C = 12

 Atomic mass of H  = 1

  Atomic mass of O = 16

Insert the parameters and solve;

  Relative molecular formula = 2(12) + 3(1) + 2(16) = 59g/mol

So, the first choice is the compound.

Answer:

Kindly check explanation section.

[tectonic activity].

Explanation:

What the team of geologists were talking about is known as the continental drift. The term continental drift which was introduced in the 1500s by people like Abraham Ortelius was mot accepted because the reasons backing it were not sufficient enough. The work on Continental drift was also worked on by people like Charles Lyell, Alfred Russel and Wegener. The term continental shift is used by geologists and other scientists to explain the movement of continents over time. The movement of continents is actually the movement on tectonic plates.

Although the movement of continents has not been accepted generally in those times, there has been modern evidence to back it up such as the record on fossils found in in several continents which are similar.

Diego‘s little brother should be told that different continents move at different rate and the movement is on the tectonic plates.