Answer: [tex]1s^22s^22p^63s^13p^2[/tex].
Explanation:
Electronic configuration is defined as the distribution of electrons in the energy levels around an atomic nucleus.
Atomic number helps in determining the electronic distribution of an atom. We write electronic configuration according to Aufbau's principle in which shells are arranged in increasing energy levels.
Aluminium (Al) is a p block element and its atomic number is 13.
Electronic configuration of aluminium is [tex]1s^22s^22p^63s^23p^1[/tex].
Excite state is achieved when the electron moves to a higher energy level.The 3s electron moves to 3p orbital so that it can form three bonds.
Thus Electronic configuration of aluminium in an excited state is [tex]1s^22s^22p^63s^13p^2[/tex].
When 25.0 g of ch4 reacts completely with excess chlorine yielding 45.0 g of ch3cl, what is the percentage yield, according to ch4(g) + cl2(g) → ch3cl(g) + hcl(g)?
Percentage yield = (actual yield / theoretical
yield) x 100%
The balanced equation for the reaction is,
CH₄(g) + Cl₂(g) → CH₃Cl(g)
+ HCl(g)
Since there is excess of Cl₂ gas, we can assume that all of CH₄ gas are reacted.
Moles of CH₄(g) = mass / molar mass
= 25.0 g / 16 g/mol
= 1.5625 mol
The stoichiometric ratio between CH₄(g) and CH₃Cl(g)
is 1 : 1
Hence moles of CH₃Cl(g) = 1.5625 mol
Molar mass of CH₃Cl(g) = 50.5 g/mol
Mass of CH₃Cl(g) = number of moles x molar mass
= 1.5625 mol x 50.5 g/mol
= 78.9 g
Hence theoretical yield = 78.9 g
Actual yield = 45.0 g
Hence,
Percentage yield = (45.0 g / 78.9 g) x 100%
= 57.03%
Would be glad if you helped me!
if 392cm2 of helium at 32C and 925 torr are cooled to -15C and the pressure is reduced to 775 torr, calculate the new volume the gas will occupy
How do you tell how many electrons an element wants to gain or lose?
How does the law of conservation of mass apply to this reaction: C2H4 + O2 → H2O + CO2?
Which pH range is basic?
A. 0.00 to 2.00
B. 3.00 to 5.00
C. 6.00 to 8.00
D. 9.00 to 11.00
When hydrogen burns, water vapor is produced. the equation is 2h2(g) + o2(g) → 2h2o(g). if 12 l of oxygen are consumed at stp, what volume of water vapor is produced?
At standard temperature and pressure, burning hydrogen gas reacts with oxygen to produce water vapor in a ratio where 12 liters of oxygen would produce 24 liters of water vapor, according to the stoichiometric relationship in the chemical equation.
When hydrogen burns, water vapor is produced according to the balanced chemical equation . This tells us that 2 volumes of hydrogen react with 1 volume of oxygen to produce 2 volumes of water vapor. Therefore, if 12 liters of oxygen are consumed at STP (standard temperature and pressure), an equivalent stoichiometric ratio would apply, and hence 24 liters of water vapor would be produced, because the ratio of oxygen to water vapor in the equation is 1:2.
When bringing water to a boil in the mountains, the time needed to reach the boiling point is?
How many molecules are in 13.5g of sulfur dioxide, so2?
Taking into account the definition of avogadro's number, 0.21 moles of sulfur dioxide contain 1.26482×10²³ molecules.
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
First you must determine the number of moles that 13.5 g of sulfur dioxide contains. For that, I use the molar mass of the compound, which is defined as the amount of mass that a substance contains in one mole.
In this case, the molar mass of sulfur dioxide is 64 g/mole. So the number of moles that 13.5 grams of the compound contain can be calculated as:
[tex]13.5 gramsx\frac{1 mole}{64 grams} =[/tex] 0.21 moles
Then you can apply the following rule of three: if 1 mole of sulfur dioxide contains 6.023×10²³ molecules, then 0.21 moles contain how many molecules of sulfur dioxide?
amount of molecules of sulfur dioxide= (6.023×10²³ molecules× 0.21 mole)÷ 1 mole
amount of molecules of sulfur dioxide=1.26482×10²³ molecules
Finally, 0.21 moles of sulfur dioxide contain 1.26482×10²³ molecules.
Learn more about Avogadro's Number:
brainly.com/question/11907018?referrer=searchResults brainly.com/question/1445383?referrer=searchResults brainly.com/question/1528951?referrer=searchResultsWhich of the following best expresses the definition of a closed system? Energy can enter or leave the system but matter cannot. Heat and matter are both able to enter or leave the system. Matter can enter or leave the system but energy cannot. Heat and matter can enter the system but cannot leave the system.
what is an ideal gas? how many ideal gases are there in the universe?
An ideal gas is a theoretical concept used to understand gas behavior. Real gases do not behave exactly like ideal gases but can approach ideal behavior at low pressures. No ideal gases exist in the universe.
An ideal gas is a theoretical concept used to understand the behavior of gases. It is a hypothetical gas that obeys the ideal gas equation of state and follows the kinetic theory of gases.
No real gas behaves as an ideal gas, but at low pressures, gases tend to behave more like ideal gases.
There are no ideal gases in the universe as they are a theoretical construct and do not correspond to any real system.
Can someone please describe the method for titration to me please :)
Please anwser will be thanked
Which is a negative result of eating too many lipids?
A-Fatty acids become deficient in the body.
B-Dangerous fat-soluble vitamins are carried to cells.
C-Fat deposits put a strain on the body.
D-The body produces too many membrane structures.
Final answer:
Eating too many lipids can lead to fat deposits that strain the body, unhealthy weight gain, increased risk of cardiovascular disease, and potentially hypervitaminosis due to excess accumulation of fat-soluble vitamins when consumed in large quantities.(Option C)
Explanation:
A negative result of eating too many lipids, specifically saturated fatty acids, trans fats, and cholesterol, is that fat deposits can put a strain on the body. Excessive intake of lipids can lead to an unhealthy weight gain and a rise in blood lipid levels, which in turn may increase the risk of health problems such as cardiovascular disease.
Conditions like atherosclerosis, where cholesterol contributes to the narrowing of arteries, can manifest as a result of high cholesterol levels. Moreover, while fat-soluble vitamins A, D, E, and K are absorbed with the help of dietary fats, an overabundance due to excessive lipid intake can lead to hypervitaminosis, a state where excess vitamins are stored in the body's fat.
PLEASE HELP! I'll mark brainliest!
What is the concentration of H+ ions at a pH = 8?
mol/L
What is the concentration of OH– ions at a pH = 8?
mol/L
What is the ratio of H+ ions to OH– ions at a pH = 8?
Answer:
0.00000001
0.000001
0.000001 : 1 or 1 : 100
Explanation:
answer on e2020
For the following nuclear reaction, what was the beginning radionuclide (X)? X → 86Rn222 + 2He4
The primary product of the combustion of sulfur is:
How would agglutination reactions be used to locate the source of an epidemic?
Agglutination reactions are used to locate the source of an epidemic because it is highly sensitive and may be used to detect the existence of antibody or antigen in a patient’s serum. Agglutination reactions are commonly used in the medical clinic. It can be used to identify the blood cells type for transfusion and to know the cultures of bacteria. It has been widely used to know if a patient had a bacterial infection.
Answer:
The agglutination reactions clinically exhibit a broad spectrum of applications. They facilitate in finding the existence of antibodies or antigens in the sample. The agglutination reactions can be used to find the epidemic source. This can be achieved by testing the blood sample of the patient.
If the antibodies found in the sample of blood possess the tendency of undergoing agglutination with the disease-causing antigens, then it can be considered that the person has got encountered with the disease. In case of an epidemic, the samples of blood from the group of individuals is taken and examined for the agglutination reaction. Thus, the reaction can be used to find the source of the epidemic.
After the equation below has been balanced for a reaction in an acidic solution, what will the coefficients of the reactants and products be, in order? h2o2 + feso4 + h2so4 fe2(so4)3 + h2o
ROY G BIV is associated with this type of electromagnetic radiation:
A. X rays
B. visible light
C. microwaves
D. infrared rays
Which structure corresponds to the predominant form of this molecule near ph 7?
At a neutral pH of 7, the amino acid exists in the zwitterionic form, with a positive charge on the nitrogen of the amino group and a negative charge on the oxygen of the carboxyl group. This is due to the molecule's ability to accept or donate protons.
Explanation:The structure of a molecule at a certain pH is affected by the molecule's ability to accept or donate protons. Amino acids, which are the molecule in question here, contain both carboxyl (-COOH) and amino (-NH2) groups. These groups can either donate or accept protons, depending on the pH of the environment.
At a pH less than 7, the environment is acidic and has a high concentration of protons. The carboxyl group tends to donate a proton and exist as COO-, while the amino group attracts protons and forms NH3+.
At pH 7, the environment is neutral. In this condition, amino acids usually exist in the zwitterionic (dipolar) form, where the carboxyl group is COO- and the amino group is NH3+.
At pH greater than 7, the environment is basic with a lower concentration of protons. Here, the amino group tends to donate a proton and exist mostly as NH2, while the carboxyl group remains COO-.
So, at pH 7, the predominant form of an amino acid would be the zwitterionic form, with a positive charge on the nitrogen of the amino group and a negative charge on the oxygen of the carboxyl group.
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In a sealed bottle that is half full of water, equilibrium will be attained when water molecules
In which reaction does the oxidation number of hydrogen change?
a.hcl (aq) + naoh (aq) → nacl (aq) + h2o (l)
b.2na (s) + 2h2o (l) → 2naoh (aq) + h2 (g)
c.cao (s) + h2o (l) → ca(oh)2 (s)
d.2hclo4 (aq) + caco3 (s) → ca(clo4)2 (aq) + h2o (l) + co2 (g)
e.so2 (g) + h2o (l) → h2so3 (aq)?
Which of these is the best argument for switching from combustion-powered cars to fuel cell cars in order to help the environment?
They use hydrogen, which produces water vapor instead of CO2.
They conserve gasoline reserves so they can be burned in the future.
They decrease the money spent by consumers on transportation.
They decrease the reliance on other countries for non-renewable resources.
Answer:
A
Explanation: Taking it now
In the general plan for balancing redox equations, when a reaction takes place in basic solution, you will need to add
How many moles of LiCl
are in 250g of LiCl
What is the molality of a solution of water and kcl if the freezing point of the solution is –3mc030-1.jpgc?
During a thunderstorm, Charles watched flashes of lightning through his window. Which process best describes the cause of the lightning?
Answer: This is induction - charged particles moving between positively and negatively charged parts of clouds
Which of the following statements is true about the role of oxygen in cellular respiration? It reacts with water. It is one of the ending compounds. It is one of the beginning compounds. It reacts with carbon dioxide.
"It reacts with water" is incorrect I took the test and got it wrong. I believe it is B, because oxygen combines with glucose and makes carbon dioxide.
cellular respiration the starting compounds are glucose and oxygen and the ending compounds are carbon dioxide, water, and energy.
C6H12O6+6O2-->6CO2+6H2O+ energy
Glucose (sugar)+oxygen--> Carbon Dioxide+ water+energy
so It is one of the starting compounds
A student mixes 100 ml of 0.50 m naoh with 100 ml of 0.50 m hcl in a styrofoam® cup and observes a temperature increase of at,. when she repeats thisexperiment using 200mlof each solution, she observes a temperature change of at2. if no heatis losttothesurroundings or absorbed by the styrofoam cup, what is the relationship betweenat, and at2?
Answer:
The relationship between initial temperature and final temperature is 2.
Explanation:
The reaction of:
HCl + NaOH → H₂O + NaCl + ΔH
Produce heat (ΔH). This heat is evidenced in the increasing of temperature in the system.
If you add 100 mL of 0,50M of both NaOH and HCl you will produce heat, that increase the temperature of the system in X°C.
Now, the addition of 200mL of 0,50M of both NaOH and HCl will produce twice the initial heat increasing the temperature of the system in 2X°C.
That means the relationship between initial temperature and final temperature is 2.
I hope it helps!
Describe one way to prove that a mixture of sugar and water is a solution and that a mixture of sand and water is not a solution.
Answer:
The solution is always homogeneous mixture and transparent through which the light can travel. The mixture of water and sugar is a solution because sugar is soluble in water and form homogeneous mixture while the sand can not dissolve in water and sand particles scatter the light.
Explanation:
Solution:
"The solution is always homogeneous mixture and transparent through which the light can travel"
The mixture of water and sugar is a solution because sugar is soluble in water and form homogeneous mixture. The solubility of sugar is high as compared to the sand in water because the negative and positive ends of sucrose easily dissolve into the polar solvent i.e, water
Suspension:
"Suspension is the heterogeneous mixture, in which the solute particles settle down but does not dissolve"
The mixture of water and sand is suspension. The sand can not dissolve in water because it is mostly consist of quartz. The nonpolar covalent bonds of sand are too strong and cannot be break by water molecules.