How you find a unknown element (just with the atomic emission spectrum)

Answers

Answer 1
Each natural element has a characteristic light spectrum that helps identify it in samples of unknown substances. Spectroscopy is the practice of examining spectra and comparing them to those of known elements. Using spectroscopy methods, scientists can identify pure substances or compounds and the elements in them.

Related Questions

4. Hot material in the Earth's mantle rises and cool material
sinks. This is an example of

a. conduction
b. convection
c. radiation
d. none of these

Answers

Answer:

Th answer is b. convection.

Explanation:

As the heat rises it cools down and it sinks and as the cold sinks it heats up so then it rises back up.

What do you think happens to Difluoroethane at –24°C? Provide evidence to support your claim.

Answers

Answer:

The following subsections explain the explanation according to the particular circumstance.

Explanation:

The boiling point seems to be the temperature beyond which the working fluid as well as the boiling phase would be at a predetermined pressure or voltage at equilibrium among one another and.  The vapor or boiling temperature of 1,1 difluoroethane seems to be -25oC at 1 atm, although as a gas it can remain at a higher temperature around -24oC.

I NEED THIS ASAP PLEASEE
what is the partial pressure of nitrogen dioxide gas in psi in a sealed vessel that has a total pressure of 2558 psi and partial pressures of 54.6 bar for carbon dioxide?

Answers

Answer:

121.8bar

Explanation:

The partial pressure is the pressure a gas would exert if it were alone in the volume of the gas mixture;

 Given parameters:

  Total pressure  = 2558psi

   Partial pressure of carbon dioxide  = 54.6bar

Unknown:

Partial pressure of nitrogen dioxide gas  = ?

Solution:

  Total pressure = partial pressure of carbon dioxide + partial pressure of nitrogen dioxide gas

Let us convert from psi to bar;

           14.504psi  = 1 bar

           2558psi  = [tex]\frac{2558}{14.504}[/tex]   = 176.37bar

Now;

Partial pressure of nitrogen oxide = 176.37bar  - 54.6bar  = 121.8bar

Answer:

1766 psi

Explanation:

The first step is to convert 54.6 bar into psi units, which is aproximately 791.9 psi. Next, subtract that from 2558 psi and you will get about 1766 psi.

Identify the following examples as either physical or chemical change.
(Ill give brainliest if right)

Answers

Answer:

19. Physical

20. Physical

21. Chemical

22. Physical

23. Chemical

24. Chemical

25. Physical

Explanation:

What does an increase of 1 pH number represent?​

Answers

Answer:

A one-point pH change indicates the strength of the acid or base has increased or decreased tenfold; a 2-point change indicates a 100-fold change in acidity or alkalinity, and a 3-point change in pH indicates a 1000-fold change. Examples: • An increase in pH from 7.0 to 8.0 means the water is 10 times more basic.

Explanation:

formal units are formed by?

Answers

Answer:

However, when formal units are used to measure length, the measurement can usually be read from a scale on a ruler or tape, which shows units of a particular size. Unit iteration involves knowledge of repeatedly placing identical tightly packing units so that there are no overlaps or gaps.

Explanation:

Question 1 of 10
Which describes the law of conservation of matter?
O A. The reactants must have more atoms than the products.
B. The reactants must have fewer atoms than the products.
C. Atoms change into other elements during a reaction.
D. The same atoms must be in the products and the reactants.
SUBMIT
FIRST PERSON GETS BRAINLIEST IF RIGHT

Answers

Answer:

I think is D. The same atoms must be in the products and the reactants.

Explanation:

Explanation:

DThe same atoms must be in the products and the reactants.

What happens to the energy release of an exothermic reaction?

1.It increases the bond energy of the reactants.
2.It is released to the surroundings.
3.It raises the temperature of the reactants.

Answers

Answer:

2.It is released to the surroundings.

Explanation:

In an exothermic reaction, the energy released is to the environment. At the end of the reaction, the surrounding becomes hotter than the system where the reaction is taking place.

Heat is liberated to the surrounding in an exothermic change. At the end of this change, the surrounding becomes hotter. Examples are combustion, dissolution of substances, etc.

Which statement best describes a difference between electromagnetic waves
and mechanical waves?
A. Mechanical waves can transfer matter through empty space.
B. Electromagnetic waves vibrate in two directions that are
perpendicular to each other.
C. Mechanical waves transfer matter, not energy, from one place to
another.
D. Electromagnetic waves require empty space to transfer energy
from one place to another.

Answers

Answer:

C

Explanation:

electronic waves transmits energy but mechanical waves require a medium in order to transport their energy from bgg one place to another.

Answer:

it is B.) Electromagnetic waves vibrate in two directions that are

Explanation:

stay safe 2021

_______forces do not affect the movement of an object.​

Answers

Balanced
Balanced forces do not cause change, unbalanced ones do

what layer of the Earth is made of liquid metal?

Answers

Answer:

the outer core

Answer:

The outer core

Which characteristic is related to kinetic energy but not potential energy

Answers

Answer:

kinectic is movement and potential is still

Explanation:

While kinetic energy of an object is relative to the state of other objects in its environment, potential energy is completely independent of its environment. Hence the acceleration of an object is not evident in the movement of one object, where other objects in the same environment are also in motion.

Answer:an object’s speed

Explanation:

2. The ions in an ionic compound separate from each other when
A. dissolved in water
B. when melted
C. when conducting electricity
D. never

Answers

Answer:

A. when dissolved in water

Explanation:

Water is an extremely polar molecule, meaning it has a positive end a negative end. When an ionic compound is dissolved, the positive pole of water will be attracted to the negative ion and attach itself to it. The same goes for the positive ions. That's how water breaks down ionic compounds

Answer:

ions do separate in an ionic compound because there is the free flow of electrons in the oppositely charged ions and conducts electricity in an aqueous form

Calculate the mass of 0.100 mol of calcium

Answers

Answer:

4.01 g

Explanation:

What is the concentration of hplus ions at a ph=11

Answers

Answer: 10^-11

Explanation:

to find the concentration of H+ ions given the ph, we use the formula 10^(-pH).

so 10^-11

For the following problems, identify the substance as either an element, a compound, or a mixture. Write E for Element, C for compound, and M for mixture. 34. Silicon ___E__ 35. Salad dressing __M___ 36. Table Salt (NaCl) __C___ 37. Oatmeal with apples and raisins_____ 38. Lithium _____ 39. Copper Sulfate (CuSO4) _____

Answers

Answer:

Explanation:

34. E

35. M

36. C

37. M

38. E

39. C

What represents the identity of an element

Answers

Answer:

The identity of an element is its atomic number, which is the number of protons within the nucleus of one of its atoms.

Explanation:

who ran the control room chernobyl part 1

Answers

Is this about among Us if so I have no idea

In coastal ecosystems as sea otters populations decline sea urchins populations

Increased
Decreased
Remained the same
None of the above

Answers

Decreased I believe

identify the molar mass of na2(so4)3

Answers

Answer:

142.04 g/mol  is the answer to your question.

When 50.0 mL of 1.000 M HCl is reacted with 50.0 mL of 1.000 M NH4OH, the solution's temperature increases 8.65 °C. Calculate qsolution in units of kJ. The specific heat of the salt solution is 4.184 J/g-°C and the density is 1.010 g/mL.

Answers

Answer:

Explanation:

Total volume of solution = 100 mL .

Total mass of the solution = 100 x 1.01 g

= 101 g

specific heat of solution = 4.184 J/g-°C

rise in temperature = 8.65  °C

heat released = mass x specific heat x rise in temperature

= 101 x 4.184 x 8.65

= 3655.35 J

= 3.655 kJ .

qsolution = 3.655 kJ .

Which part of project management involves determining possible risks?

Answers

Answer:

Resources

Explanation:

Answer:

Explanation:

M

The molecule
found in paper is almost identical to the
carbohydrate molecule found in mashed
potatoes.
glycogen
chitin
cellulose

Answers

Answer:cellulose

Explanation:

I just did it.

What is the importance of activity series?​

Answers

The activity series of metals is an empirical tool used to predict products in displacement reactions and reactivity of metals with water and acids in replacement reactions and ore extraction. It can be used to predict the products in similar reactions involving a different metal.

5. What do the data in your graphs tell you? Explain in one or two sentences what trend the reader should observe in each of your graphs. (Science Lab Report, if you don't know what the answer is please don't answer-)

Answers

Answer:

Graphs are a common method to visually illustrate relationships in the data. The purpose of a graph is to present data that are too numerous or complicated to be described, and  If the data shows pronounced trends or reveals relations between variables, a graph should be used.

Explanation:

literally bro i had the same answer for my actual project for edge

Answer: Graphs are a common method to visually illustrate relationships in the data. The purpose of a graph is to present data that are too numerous or complicated to be described, and  If the data shows pronounced trends or reveals relations between variables, a graph should be used.

Explanation:

Which structure is a valid representation of a hydrocarbon molecule?

Answers

Im pretty sure it is the first one

Find the kinetic energy of a 5kg bowling ball that is traveling 2 meters per second

Answers

Explanation:

KE = ½ mv²

= ½ x 5 x 2² joule

= 10 joule

What does “like dissolves like” mean?

a
solvents dissolve chemicals with the same color (ex. both are green)
b
solvents dissolve chemicals made by the same company (ex. both made by Dow)
c
solvents dissolve chemicals with the same polarity ( ex. both are polar)
d
solvents dissolve chemicals with the same size (ex. both are 3 inches)

Answers

Answer:

c  solvents dissolve chemicals with the same polarity ( ex. both are polar)

Explanation:

Like dissolves like is one of the central rule that guides the solubility of one substance in another.

It fully suggests substance having the same nature as in polarity-wise will dissolve one another. For example, water is a polar liquid, it will dissolve table salt because it i also polar. Water cannot dissolve oil because oil is non-polar.

When a piece of sodium metal is kept in water in chemical equation​

Answers

Explanation:

Sodium metal reacts rapidly with water to form a colourless basic solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The reaction continues even when the solution becomes basic. The resulting solution is basic because of the dissolved hydroxide. 

Explanation:

Sodium metal reacts rapidly with water to form a colourless basic solution of sodium hydroxide (NaOH) and hydrogen gas (H2).

A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. What best explains the increase in the size of the panther population?

Answers

Explanation:

Because the panthers live in the southeastern region of the United states they have increased in population in that region. They have been able to gain more food and have adapted more to there environments. Which allows to increase and reproduce more. That is why the Panthers in the southeastern United states have increased In population.     I hope this works for you and that it helps. I don't mind helping someone who has a question! From, me.

A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. More panthers were born than died explains the increase in the size of the panther population.

What is the largest panther in the world?

The jaguar, also known as the panther, tigre, or onza, is the world's largest and most powerful cat. Human activities endanger this cat, as they do the Florida panther (Puma concolor).

Because the anteater population will have fewer energy storage molecules available due to the smaller ant population, the anteater population will reproduce less.

Panthers can be found in the southeastern United States. The region's panther population has grown over the last 50 years. Because no animal eats panthers, the panther population is always growing.

Thus, More panthers were born than died explains the increase in the size of the panther population.

To learn  more about the panther, follow the link:

https://brainly.com/question/28060154

#SPJ6

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