Answer:
Though a hydrogen atom has only one electron, it contains a large number of shells, so when this single electron jumps from one shell to another, a photon is emitted, and the energy difference of the shells causes different wavelengths to be released... hence, mono-electronic hydrogen has many spectral lines.
Explanation:
thank me later
The reason that the atomic emission spectrum of hydrogen contains only four lines is the hydrogen atoms form a continuous series of quantized energy levels that transmute at a variety of frequencies.
What is atomic emission spectrum of hydrogen?The emission spectrum of hydrogen consist of numerous spectral series, the wavelength is postulated by Rydberg formula.
The reason behind the lines of spectrum is the transition of electron between two energies.
Thus, the correct option is A.
Learn more about atomic emission
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How does a balanced chemical equation show the conservation of mass?
O A. It shows that the total number of moles of substances stays the
same.
B. It shows that the mass of the products is greater than the mass of
the reactants when a reaction increases the moles of substances.
O C. It shows that the mass of the reactants is greater than the mass
of the products when gases are produced by the reaction.
O D. It shows that the number of each type of atom stays the same.
Explanation:
Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. When an equal number of atoms of an element is present on both sides of a chemical equation, the equation is balanced.
5. Pick the list with the correct order of elements according to their reactivity, with the most
reactive metal first to the least reactive metal last.
A. potassium, calcium, sodium, magnesium, aluminum
B. magnesium, calcium, sodium, potassium, aluminum
C. sodium, calcium, potassium, magnesium, aluminum
D. calcium, aluminum, sodium, potassium, magnesium
Answer: do you have the answer for this yet ?
Explanation:
I’m stuck on the same question as well.
If I contain 3 moles of gas in a container with a volume of 90 liters and at a temperature of 400 K, what is the pressure inside the container? 1.09 atm
Answer:
there it is fella tried on ma own consciousness
Inyour body what's your systems work together to make sure that oxygen to all the organs of your body?
A. Respiratory and Excretory
B. Circulatory and Respiratory
C. Nervous and Excretory
D. Circulatory and Disgestive
Calculate the Molar Mass of Ba2(CO3)4
O 257
O 197
O 514
define
compound?
covalent
10 points. Please help.
If you have 3 moles of gas at a pressure of 2.5 atmospheres and a volume of 8 liters, what is the temperature? Pay attention to the unit of pressure used.
Answer:
-191.7°C
Explanation:
P . V = n . R . T
That's the Ideal Gases Law. It can be useful to solve the question.
We replace data:
2.5 atm . 8 L = 3 mol . 0.082 L.atm/mol.K . T°
(2.5 atm . 8 L) / (3 mol . 0.082 L.atm/mol.K) = T°
T° = 81.3 K
We convert T° from K to C°
81.3K - 273 = -191.7°C
Answer:
The temperature is 81.3 K.
Explanation:
An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P*V = n*R*T
where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.
In this case:
P= 2.5 atmV= 8 Ln=3 molesR= 0.082 [tex]\frac{atm*L}{mol*K}[/tex]T= ?Replacing:
2.5 atm* 8 L= 3 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] *T
Solving:
[tex]T=\frac{2.5 atm* 8 L}{3 moles* 0.082\frac{atm*L}{mol*K}}[/tex]
T= 81.3 K
The temperature is 81.3 K.
I kilogram mass
Define
Which is the best example of a compound?
Gold
Ohydrogen peroxide
Air
ocean water
pls asap
Answer:Hydrogen Peroxide or Ocean Water
Explanation:
-H2O2 is compound with 2 elements hydrogen and oxygen.
-Salt water acts as if it were one substance even though it contains two substances salt and water.
-Gold is just an element Au
-Air is just oxygen
Isotopes with unstable nuclei are __1__ and are called __2__. The __3__ of radioisotopes decay to __4__nuclei plus emission of large amounts of __5__ . The radiation may be alpha, __6__, or gamma. __7__ radiation consists of alpha particles (positively charged __8__ nuclei) that are easily stopped by a sheet of paper. Beta radiation is composed of fast-moving particles, which are __9__. Beta radiation is more penetrating than alpha radiation; it is stopped by __10__. __11__ radiation is electromagnetic radiation. Gamma radiation has no __12__ or electrical charge. It is extremely penetrating. __13__ bricks and __14__ reduce the intensity of gamma radiation but do not completely __15__ it.
Answer:
Following are the solution to the given question.
Explanation:
Isotopes are radioactive with unstable nuclei, called radioisotopes.Radioisotopes' cores decay into the stable core, with enormous quantities of radiation emissions.It could be either alpha, beta, or gamma.Alpha radiation is made up of alpha particles, that are easy to halt with such a piece of paper.Beta spread spectrum of quickly shifting, electrical electrons.Beta radiation permeates upwards of alpha radiation; metal foil gets halted.Electromagnetic radiation is gamma energy.There is also no electrical or mass radiation. It's also quite insightful.Lead brick and concrete lessen, but just don't stop, the strength of gamma radiation.Answer:
radioisotopes is the answer.
Explanation:
It took 20.0 mL of NaOH to neutralize 25 mL of 0.50 M HCl. What is the molarity of the base?
Answer:
5/8 M
Explanation:
NaOH + HCl ====> NaCl + H2O
in 25 mL of 0.5M acid, we have 1/80 Mol of HCl
it mean we must have 1/80 Mol of NaOH.
20 mL = 1/50 L
(1/80)Mol / (1/50)L = 5/8 M
hey hey hey whats your favorite show any genre could be drama, scary, and even anime. just dont say riverdale please lol
Answer:
one piece and jujutsu kaisen
Explanation:
what your favorite?
Answer:
aot, noragami, yuukoku no moriarty and promise never land only season 1 tho
Is this an alpha or beta decay?
Which of the following phenomena would be associated with the Big Bang theory.
-The universe is contracting
-Hot, Expanding matter eventually condensed into galaxies
-The universe began as a cool massive star
-Cool, Expanding matter eventually heated and became suns
-The universe is expanding
-The universe began in a hot dense state
Click on All Correct Answers
The big bang is characterized by an expanding universe.
What is the big bang?The scientists hold the theory that the universe is the result of a massive explosion that marked the beginning of the universe. Since the big bang, matter has been spreading.
Hence, one thing that has become associated with the big bang is the idea of an expanding universe.
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How many grams of oxygen are required to burn 13.50 grams of acetylene?
Explain in terms of structure and bonding why carbon dioxide has a low boiling point and calcium carbide has a high boiling point
Answer:
See explanation
Explanation:
Let us consider the two compounds carefully. Carbon dioxide is purely a non-polar molecular compound while the bond between the C2^2- ion and Ca^2+ is ionic thereby making CaC2 an ionic compound.
Recall that ionic compounds have high melting and boiling points due to strong ionic interactions in the structure of the compound.
On the other hand, CO2 is a non-polar substance whose molecules are held together only by weak dispersion forces.
As a result of the reasons outlined above, carbon dioxide has a low boiling point and calcium carbide has a high boiling point.
Calculate the volume 3.00 moles of a gas will occupy at 24.0°C and 105.2
kPa,
140. L
35.4L
15.4L
70.4L
Answer:
70.34 litres
Explanation:
Using ideal gas law equation;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the information given in the question;
n = 3 moles
V = ?
P = 105.2 KPa = 105.2/101 = 1.04atm
T = 24.0°C = 24 + 273 = 297K
Using PV = nRT
1.04 × V = 3 × 0.0821 × 297
1.04V = 73.15
V = 73.15 ÷ 1.04
V = 70.34 litres.
Indicate whether the statements are True or False. CHANGE any false ones to make them true! _____ a) At equilibrium the amount of products must equal the amount of reactants. _____ b) During equilibrium, the concentration of the products does not change. _____ c) A collision between reactants is all that is needed to cause a reaction. _____ d) At the beginning of a reaction the forward reaction is faster than the reverse reaction, but then the forward reaction slows down as the reverse reaction speeds up.
Answer:
a. True
b. True
c. True
d. False
Explanation:
At equilibrium condition, the amount of products must be equal to the amount of reactants means 50% of reactant is converted into product and 50% of product is converted into reactant. During equilibrium, the concentration of the products as well as reactant does not change. Yes, a collision between reactants is needed to initiate and complete the reaction. If the concentrations of the reactants are too large, the rate of the forward reaction will be faster than the reverse reaction, and some of the reactants will be converted into products until equilibrium is achieved.
At a particular temperature and [A]0 = 2.00 x 10-2 Molar, concentration versus time data were collected for this reaction and a plot of ln[A]t versus time resulted in a straight line with a slope value of -2.97 x 10-2 min-1.
What is the half-life of this reaction?
Explanation:
What does a bi-directional arrow tell you about a chemical reaction?
Balance this equation
Cu(OH)2+ HCI - - - - - > CuCl2 + H2O
[tex] \boxed{ \boxed{\huge{ \mathrm{ \underline{ Answer} \: \: ✓ }}}}[/tex]
The Balanced Chemical Equation for above reaction is :
[tex] \small \mathrm{Cu(OH)_2+ 2HCI\rightarrow CuCl _ 2 + 2H2O}[/tex]
_____________________________
[tex]\mathrm{ ☠ \: TeeNForeveR \:☠ }[/tex]
Calculate the Molar Mass of Radon pentaiodide (Rnls)
857
349
1237
Explanation:
222.01758 g/mol
3.1Computed Properties
Metals (m) in group 2 of the periodic table form ionic bonds with nonmetals (x) present in group ______ leading to formation of ionic compound with general formal of mx
A) 15
B) 16
C) 17
D) 18
Answer:
16
Explanation:
Metals in group 2 form ions of the sort M^2+. If they must form ionic compounds of general formula MX, then the non metal (X) must have a valency of 2 and form the ion X^2-.
Among the options listed, only elements of group 16 form ions of the sort X^2-, hence they are able to form compounds of general formula MX with group 2 cations. Examples of such compounds include; CaS, MgS etc
Which organelles surround the cell?
Answer:
Cell Wall, Cell Membrane, Nucleus, Endoplasmic Reticulum (ER), and Ribosome.
Explanation:
Hopefully this helps :).
Answer:
the nucleus the largest organelle in eukaryotic cells is surrounded by the cells
The saturation point for a solution is 250 grams of solute per 500 grams of solvent. If you pour 500 grams of
solute into 800. grams of solvent, how many grams of solute are in solution? 3-digit answer only
Answer: 400 g of solute is present in the solution
Explanation:
A solution consists of solute and solvent. A solute is defined as the component that is present in a smaller proportion and solvent is defined as the component that is present in a larger proportion.
Saturation point of a solution is defined as the point after which the solution becomes saturated. This simply means no more solute can be added to the solution.
Mass of solvent = 800 g
At saturation point, 500 g of solvent can dissolve 250 g of solute
Applying unitary method:
800 g of solvent will dissolve = [tex]\frac{250g}{500g}\times 800g=400g[/tex] of solute
Hence, 400 g of solute is present in the solution.
An ideal gas is contained in a cylinder with a volume of 5.0x102 mL at a temperature of 30°C and a pressure of 710. Torr. The gas is then compressed to a volume of 25 mL, and the temperature is raised to 820° C. What is the new pressure of the gas?
Answer:
51207 torr is the new pressure of the gas
Explanation:
We can solve this question using combined gas law that states:
P1V1T2 = P2V2T1
Where P is pressure, V volume and T absolute temperature of 1, initial state and 2, final state of the gas
Computing the values of the problem:
P1 = 710torr
V1 = 5.0x10²mL
T1 = 273.15 + 30°C = 303.15K
P2 = ?
V2 = 25mL
T2 = 273.15 + 820°C = 1093.15K
Replacing:
710torr*5.0x10²mL*1093.15K = P2*25mL*303.15K
3.881x10⁸torr*mL*K = P2 * 7.579x10³mL*K
P2 = 51207 torr is the new pressure of the gas
Organize the following list of elements from highest to lowest Ionization Energy:
Phosphorus, Bismuth, Arsenic, Antimony, Nitrogen
Answer: The list of elements from highest to lowest Ionization Energy is Nitrogen > Phosphorus > Arsenic > Antimony > Bismuth.
Explanation:
The amount of energy required to remove the most loosely bound electron from an isolated gaseous atom or ion is called ionization energy.
Element with a half-filled orbital requires much more energy to remove an electron. This is because element with a half-filled electronic configuration is the most stable in nature.
More stable or tightly electrons are bound to the nucleus of an atom more will be its ionization energy. This also means that smaller is the atom higher will be its ionization energy.
When we move from top to bottom in a group the size of atom increases and the attraction between nucleus of atom and its valence electrons decreases. Hence, less will be the ionization energy.
Therefore, ionization energy decreases on moving down a group.
So, the given elements Phosphorus, Bismuth, Arsenic, Antimony, Nitrogen are all group 15 elements. Hence, decreasing order of their ionization energy is as follows.
Nitrogen > Phosphorus > Arsenic > Antimony > Bismuth
Thus, we can conclude that the list of elements from highest to lowest Ionization Energy is Nitrogen > Phosphorus > Arsenic > Antimony > Bismuth.
Balance the following equation by providing the correct coefficients C2H6 + O2 -> CO2 + H2O
How many total valence electrons are in P2O?
Answer:
In thes structure of PO43- there are a total of 32 valence electrons. For the structure for PO4 3- you should take formal charges into account to find the best structure for the molecule. Remember, PO4 3- has a negative three charge on the molecule.
Explanation:
4. There are 1.9 moles of Oxygen gas at a pressure of 3.50 atm, and the temperature is 65°C. What is the
volume of the gas? Remember that R = 0.0821 L x atm/Kx mol AND that you must convert °C to K.
Fill in the variables chart:
Answer:
15.06 L
Explanation:
Using the ideal gas law equation:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the information provided in this question,
P = 3.50 atm
n = 1.9 moles
V = ?
T = 65°C = 65 + 273 = 338K
Using PV = nRT
V = nRT/P
V = (1.9 × 0.0821 × 338) ÷ (3.5)
V = 52.725 ÷ 3.5
V = 15.06 L