Answer: answer is A
Explanation:
What causes the emission of light?
Answer:
When the electrons in the atom are excited, for example by being heated, the additional energy pushes the electrons to higher energy orbitals. When the electrons fall back down and leave the excited state, energy is re-emitted in the form of a photon. The wavelength (or equivalently, frequency) of the photon is determined by the difference in energy between the two states. These emitted photons form the element's spectrum.
The fact that only certain colors appear in an element's atomic emission spectrum means that only certain frequencies of light are emitted. Each of these frequencies are related to energy by the formula:
{\displaystyle E_{\text{photon}}=h\nu }E_{\text{photon}}=h\nu ,
where {\displaystyle E_{\text{photon}}}E_{\text{photon}} is the energy of the photon, {\displaystyle \nu }\nu is its frequency, and {\displaystyle h}h is Planck's constant. This concludes that only photons with specific energies are emitted by the atom. The principle of the atomic emission spectrum explains the varied colors in neon signs, as well as chemical flame test results (described below).
The frequencies of light that an atom can emit are dependent on states the electrons can be in. When excited, an electron moves to a higher energy level or orbital. When the electron falls back to its ground level the light is emitted.
Explanation:
where else can you observe colorful light emisiions? are these emission applications related?
Explanation:
Some examples of colorful light emissions are street lights, neon signs and, of course, fireworks. Neon signs emit light when an electric current passes through the neon gas.
The area surrounding the nucleus is called: protons electrons neutrons electron cloud
Answer:
eletrons
Explanation:
eletrons is not in the neuclus its around it
Answer:
electrons can be found around the nucleus in an electron cloud.
Explanation:
the difference between a molecule and a compound is that a compound is made up of atom from
Answer:
answer explained below.
Explanation:
hey! a molecule is made up of two or more atoms, and a compound is made up of two or more elements. not all molecules are compounds, but all compounds are molecules, because compounds are made up of different atoms.
example: O2 is a molecule but not a compound because it is made up of the same element, but has more than one atom.
An object that is 0.5 m above the ground has the same
amount of potential energy as a spring that is stretched
0.5 m. Each distance is then doubled.
How will the potential energies of the object and the
spring compare after the distances are doubled?
O The gravitational potential energy of the object will
be two times greater than the elastic potential energy
of the spring.
O The elastic potential energy of the spring will be four
times greater than the gravitational potential energy
of the object.
The elastic potential energy of the spring will be two
times greater than the gravitational potential energy
of the object
O The potential energies will remain equal to one
another
The elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.
Answer:
C.) The elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.
Explanation:
Hope this helps! Sorry if I am wrong. ;-;
Identify each of the pictures as heterogeneous or homogeneous
Answer : The image C shows homogeneous mixture and image A, B and D shows heterogeneous mixture.
Explanation :
Heterogeneous mixtures : It is a mixture in which the constituent substances are not mixed well and do not have a uniform composition throughout the mixture that means appears non-uniformly throughout the solution.
Homogeneous mixtures : It is a mixture in which the constituent substances are mixed well and have a uniform composition throughout the mixture that means appears uniformly throughout the solution.
From the given image we conclude that the,
image C shows homogeneous mixture and image A, B and D shows heterogeneous mixture.
Elements in the same period of the periodic table exhibit similar physical and chemical properties.
Answer:
same valency electrons
Explanation:
example g 1 elements
GIVING BRAINLIEST I NEED ANSWER IN LESS THAN 5 mins!
Is this a scientific model? Use complete sentences to explain why or why not.
Answer:
its a scientific model
Explanation:
It is a scientific model because it is showing the water cycle. In the water cycle it is scientifically showing how water circulates through the Earth. For example, the water in the ocean evaporates which is evaporation, then it condensates into a cloud that then becomes condensation and the condensation makes precipitation when it rains. When it falls to the ground, it then becomes a runoff down a hill.
Ai +O2 =Ai2O3 how many atoms of oxygen exist in this product
The molar mass of SO3 is grams.
Answer:
80.07 g/mol
Explanation:
Step 1: Define
Molar Mass S - 32.07 g/mol
Molar Mass O - 16.00 g/mol
Step 2: Find molar mass of compound
S = S × 1 = 32.07 g/mol
O₃ = O × 3 = 48.00 g/mol
32.07 + 48.00 = 80.07 g/mol
Answer:
80.06 grams
Explanation:
Edmentum!!
Most of the dissolved substance in sea water is: hydrogen chloride nitrogen sodium ANSWER NOW! I NEED HELP ASAP! WILL GIVE BRAINLIEST!
Answer: Sodium chloride
Explanation:
Ocean water contains a number of substances. When a substance which has ionic bonds is dissolved in water it takes the form of ions.
The most common ions in ocean water are sodium and chloride. These are the ions formed when common salt, sodium chloride (NaCl) is dissolved in water.
Sodium chloride accounts for about 3% of ocean water by mass.
Answer:
By far, the most abundant elements are hydrogen and water.
Explanation:
The analysis of the 77 sea water samples taken during the Challenger's 3-year voyage did much to lay the foundations for determining the chemical content of sea water. By far, the most abundant elements are hydrogen and water (combined to make water). Together, these elements make up 96% of sea water. Sodium chloride and magnesium make up just under 4% of sea water. Trace amounts of 97 other elements are found in the remaining 0.08%. Of the trace elements, calcium, potassium, sulfur, and bromine are the most abundant.
This is directly from the text.
Stereoisomers share the same connectivity and differ only in the way their atoms are arranged in space. Draw the structure of a compound that is a stereoisomer of trans-1,2-dibromocyclobutane.(Note that the question asks for a different stereoisomer of the named compound and not the named compound itself.)Use the wedge/hash bond tools to indicate stereochemistry.Show stereochemistry in a meso compound.In cases where there is more than one answer, just draw one. (use same instructions below)
1b) Draw the structure of a compound that is a stereoisomer of cis-1,2-dimethylcyclopentane.1c) Draw the structure of a compound that is a stereoisomer of cis-1,2-dimethylcyclobutane.
Answer:
Explanation:
A stereoisomer refers to an isomer that shares an identical bonding structure but differs in the geometric position of functional groups and atoms.
Stereoisomers are molecules which have the same semi-expanded formula, but a different arrangement in space.
They are isomers with a similar structural formula, yet which contrast just in their spatial geometry.
From the given question, we are provided with some set of instructions to draw the structure of the following compounds.
stereoisomer of trans-1,2-dibromocyclobutane
cis-1,2-dimethylcyclopentane
cis-1,2-dimethylcyclobutane
The diagram for each compound given can be seen in the attached file below.
Please help i don’t understand
Which of the following is TRUE?
A. Lipids are fatty substances found in the blood.
B. Cholesterol is a type of lipid.
C. Triglycerides is a type of lipid.
D. All of the above
Answer:
The answer is D.
Explanation:
I learned about this last year. Its very simple if you let your parents or teachers explain it to you!
Answer:
All of the above
Explanation:
All the answers are correct. Lipids come in difference forms.
What is the weight of 12.0 moles of water?
Answer:
216g H2O
Explanation:
H = 1
O = 16
H= 2 × 1 = 2
O= 1 × 16 = 16
16 + 2= 18g/mol
18g H2O = 1 mol
X g H2O = 12 mol
X × 1 = 18 × 12
X = 216 g/mol
The weight of 12.0 moles of water is determined as 216 g.
What is the weight of the water?The weight of water is determined from the molecular weight of water. The molecular weight of water is given 18 g/mol.
The weight of 12 moles of water is calculated as follows;.
W = nM
W = 12mole x 18 g/mol
W = 216 g
Thus, the weight of 12.0 moles of water is determined as 216 g.
Learn more about weight here: https://brainly.com/question/2337612
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Is this a model of an element, a compound, or a mixture? Explain your reasoning.
Answer:
A mixture.
Explanation:
The image contains two types of molecules: one with a blue centre and one with a green centre. They are both compounds, as they contain atoms of different elements that are chemically combined/ bonded to each other. As the molecules of the different compounds are not bonded to each other, the model must show a mixture.
A mixture: a combination of molecules of different elements and/or compounds that are not chemically combined e.g. salt dissolved in water.
An element: a substance containing only one kind of atom e.g. oxygen.
A compound: a substance containing two or more kinds of atoms (atoms of different elements) are chemically bonded to each other e.g. water.
In the model of an element, it represents a mixture. The correct option is b.
What is a mixture?A mixture is a non-chemically coupled combination of molecules from different elements and/or compounds, such as salt dissolved in water.
There are two kinds of molecules in the image: one with a blue center and one with a green center. They are both compounds because they contain atoms of different elements that have been chemically combined/bonded. Because the molecules of the various compounds are not bound to one another, the model must depict a mixture.
A compound is a substance that contains two or more types of atoms (atoms of different elements) that are chemically bound to one another, such as water.
Therefore, the model shows a mixture.
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What are the basic building blocks of proteins?
OA
starches
OB. electrolytes
Ос.
amino acids
OD
polyunsaturated fats
Answer:
Amino Acids
Explanation:
What Are Proteins Made Of? The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component called a side chain.
Answer:
Amino Acids
Explanation:
At STP, a 50-gram sample of H20(I) and a 100-gram sample of H20(I) have
Answer:
(1) the same chemical properties .
Explanation:
Hello!
In this case, among the options:
(1) the same chemical properties
(2) the same volume
(3) different temperatures
(4) different empirical formulas
We can see that they have the same chemical properties as they at the same conditions, same type of bond (polar), molecular geometry, bond angle (104.5 °) and so on. Nevertheless, at STP (1 atm and 273.15 K) they do not have the same volume since the larger the mass, the larger the volume, they have the same temperature and the both of them are H₂O.
It means that the answer is (1) the same chemical properties .
Best regards.
DONT DO A RANDOM ANSWER OR ILL REPORT, ILL GIVE BRAINLIEST AND ALOT OF POINTS IF YOU SAY THE CORRECT ONE!! students who enjoy completing worksheets with specific directions are likely to be what kind of thinkers?
What are colliding when plateaus and mountains ranges are formed
Answer:
mountain ranges form when pieces of Earth's crust—called plates—smash against each other in a process called plate tectonics, and buckle up like the hood of a car in a head-on collision.
Hope that answers your question.
PLZ HELP PLZ HELP HURRY 40 POINTS NO WRONG ANSWERS PLZ
what is an isotope
Stomach acid is predominately hydrochloric acid. Write the balanced chemical equation for the neutralization reaction between HCI and the active ingredient.
Express your answer as a chemical equation. Identify all of the phases in your answer
Answer:
HCl + Mg(OH2) ---> MgCl2 + H2O
Explanation:
hydrochloric acid + magnesium hydroxides ==> magnesium Chloride (a salt) + Water
HCl + Mg(OH2) ---> MgCl2 + H2O
Eukaryotes share which characteristic with prokaryotes?
•lysosomes
•vacuole
•mitochondria
•cell membrane
Answer:
cell membrane is the answer
Answer: cell membrane
Explanation:
A pitcher throws a 142 g baseball, which accelerates at a speed of 9 m/s^2. How much force does the pitcher apply to the ball?
Answer:
The answer is 1.28 NExplanation:
The force acting on an object given the mass and acceleration we use the formula
force = mass × accelerationFrom the question
mass = 142 g = 0.142 kg
acceleration = 9 m/s²
We have
force = 0.142 × 9 = 1.278
We have the final answer as
1.28 NHope this helps you
Answer:
1.28
Explanation:
In order for you to get the force you have to multiply the mass & acceleration. The baseball mass is 142 g and the acceleration is 9. So you will calculate 0.142 x 9 and that will give you 1.278. You will then round the 7 to an 8 and then you get the answer 1.28.
Molecules such as water that are electrically neutral overall but still have partially charged regions are referred to as?
A. Covalently charged
B. Ions
C. Electrolytes
D. Isotopes
E. Polar molecules
Answer:
B
Explanation:
I studied this and had a test
What two particles are found in the nucleus of an atom?
Answer: it has one proton and electron
Explanation:
Determine a piece of copper with a volume of 100 cm power 3 has a mass of 890 g. Explain how you could use this information to find out how much mass would be in 13 cm power 3 of copper
which physical change is endothermic
Answer:The physical changes that are endothermic are melting, vaporization and sublimation.
Explanation:
whats the meaning
Speed ?
and the
meaning of
of Motion?