Answer:
Carbon has 2 unpaired electrons
Oxygen has 2 unpaired electrons
Sulfur has 2 unpaired electrons
Explanation:
How long would a sample of 26g of Nickel-63 take to decay down to
6.5g?
GIVING BRAINLY TO CORRECT ANSWER !!
Please help!! I don’t think I did this right.?
Answer: I think you did it the right way-I think
Explanation:
Hope that helps!
Name: King
How has genetic modification most likely affected the safety and availability of fruits and vegetables?
Answer:
Genetic modification most likely affected the safety and availability of fruits and vegetables by potentially causing infertility, immune problems, and allergic reactions.
if 0.500 mol of a non-electrolyte solute are dissolved in 500g of ether what is the freezing point of the solution
Answer:
the answer might be 250g for the this question hope this helps
Explanation:
Since the solute is dissolved in ether, which has a freezing point of -116.3 °C, the freezing point of the solution will be: -116.3 °C - 5.24 °C = -121.5 °C.
What is freezing point?
To solve this problem, we need to use the formula for freezing point depression:
ΔTf = Kf · m
where ΔTf is the change in freezing point, Kf is the freezing point depression constant of the solvent, and m is the molality of the solution.
Since the solute is a non-electrolyte, it does not dissociate in the solvent, so the number of particles in solution is the same as the number of moles of solute:
molality = moles of solute / mass of solvent (in kg)
First, we need to calculate the mass of ether in kg:
mass of ether = 500 g = 0.5 kg
Next, we can calculate the molality of the solution:
molality = 0.500 mol / 0.5 kg = 1.00 mol/kg
The freezing point depression constant for ether is 5.24 °C·kg/mol. We can now use this value and the molality to calculate the change in freezing point:
ΔTf = Kf · m = 5.24 °C·kg/mol · 1.00 mol/kg = 5.24 °C
Since the solute is dissolved in ether, which has a freezing point of -116.3 °C, the freezing point of the solution will be:
freezing point of solution = -116.3 °C - 5.24 °C = -121.5 °C
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 60 points! please help me! will appreciate it!
Answer:
[tex]\huge\boxed{\sf Mass = 726.96\ g}[/tex]
Explanation:
In the reaction:
For 2 moles of Na, 1 mol of H₂ is produced
At STP,
1 mol of H₂ = 22.4 L/mol molar value
Converting 354 L to moles:
= volume / molar value
= 354 / 22.4
= 15.8 moles
We already know that:
1 mol of H₂ ↔ 2 moles of Na
So,
15.8 moles of H₂ ↔ 15.8 × 2 moles of Na
15.8 moles of H₂ ↔ 31.6 moles of Na
So, to produce 15.8 moles of H₂ (354 L), we need 31.6 moles of Na.
Converting 31.6 moles of Na into mass:
Mass = moles × molar mass
Mass = 31.6 × 23
Mass = 726.96 g
[tex]\rule[225]{225}{2}[/tex]
hich variables are represented in the ideal gas law?
select all that apply
Moles
Mass
Ideal gas constant
Volume
PV=nRT
Explanation:
P- pressure
V- volume
n-moles
R- constant gas
T- temperature
Someone Please Help Me out
Answer:
where are u stuck ????
Explanation:
tell us fast
When referring to bacteria cells, a plasmid
is not naturally occuring.
does not code for proteins.
is the large bacterial chromosome contained in the nucleoid.
is composed of double-stranded RNA.
is a small, circular double-stranded DNA molecule that replicates autonomously.
Answer:
is a small, circular double-stranded DNA molecule that replicates autonomously.
Explanation:
hope this helps
HELP ME, HOW? Draw on the graph a line that shows the car decelerating steadily to a stop from point D in 10 s. Mark the point where the car has stopped as point F.
Answer:
There is no deacceleration.
Explanation:
Let's check relation between velocity and acceleration
[tex]\\ \rm\Rrightarrow a=\dfrac{dv}{dt}[/tex]
[tex]\\ \rm\Rrightarrow a\propto dv[/tex]
So as velocity graph is going up acceleration is going up
Those flat lines on graph shows constant acceleration .
Curve lines up shows instantaneous acceleration.
If the graph is going down then it can be deacceleration .
Note :-No F is present in graph
Answer:
Explanation:
The car decelerates steadily to a stop so the line showing the deceleration will be a straight line from point D.
D is at 60s so 10s from D will be 70s. The car stops so velocity will be zero.
Based on the above, the line should look something like in the attached picture.
what is electron also what is the meaning of civil rights also what is a force
Answer:
what is electron?electrone is a subatomic particle whose electric charge is negative one elementary charge.
what is the meaning of civil rights?civil rights are the rights that people have to equal treatment and equal opportunities.
what is force?in physics, force is an influence that can change the motion of an object.
60 points! please answer will mark brainliest! thank you!
hello people ~
The chemical formula of magnesium oxide is?
(a) MgO2
(b) Mg2O
(c) MgO
(d) Mg(OH)2
Answer:
MgO
Magnesium has valency 2Oxygen also has valency 2So 2-2 gets cancelled out and the formula becomes MgOWhich element makes up most of the air we breathe.
give 5 causes of diseases or infectious diseases
Answer:5 causes of diseases or infectious disease is
1.bacteria
2.indirect/direct contact with a sick person or contaminated item
3.viruses
4.food contamination
5.not washing hands with soap or water/ not getting vaccinated/not getting certain vaccines
(hope this is helpful)
Explanation:
Y’all answer as many as u can they just need to be correct thx!!!!
(WILL MARK BRAINLIEST)
(you can use google) it didn’t help me tho :(
Answer:
10. Embryology is the branch of biology and medicine concerned with the study of embryos and their development.
11. I think the answer is, Both humans and whale embryos have a tail and a backbone (I'm not sure).
12. Basilosaurid, any member of the family Basilosauridae, an early group of whales that lived from the middle Eocene to the late Oligocene Epoch (about 41 million to 23 million years ago).
13. Protocetids had long snouts, large eyes, and their nasal opening was farther caudally than in earlier archaeocetes.
14. Two ways we know that Maiacetus was a whale re:
1) Their skeletons have all been found among fossils of sea-creatures which suggests they lived in the sea.
2) Their hip bones were strong enough to walk on land, but their short legs combined with long flat fingers and toes suggest they would have had difficulty walking.
15. The name Maiacetus means Mother Whale. Maiacetus is significant because of how well the skeletons were preserved.
Hope this helps! :D
8. Which pair of substances react together?
A bromine and potassium chloride
B bromine and potassium iodide
C iodine and potassium bromide
D iodine and potassium chloride
Sunlight shining through a clear window hits Jeremy's face while he does his homework. He uses a large wooden block to cover the
window. What do the wooden block and the clear window demonstrate?
A)
Visible light can be transmitted only through certain materials
B)
Visible light can be completely absorbed by all materials.
C)
Visible light can be transmitted through all materials.
D)
Visible light can be completely reflected by all materials
Answer:
A.Visible light can be transmitted only threw certain materials
Explanation:
Because I had this question on study island and I got it right lol
Answer:
A
Explanation:
Visible light can be transmitted only through certain materials
This is correct I just did the problem
Calculate the molar mass for NaOH
Answer:
39.998 g/mol
Explanation:
Hello, have a periodic table handy!
Molar mass is the molecular weight of a compound; sum of all of the mass in grams (from the periodic table) from each and specific atom.
In the periodic table, the molecular weight of an atom is usually shown on the bottom of the element.
In NaOH, there are three atoms in that compound. Na (sodium), O (oxygen), and H (hydrogen).
For Na, the molecular weight is 22.99g/mol (grams per mole)
For O, the molecular weight is 16.00g/mol
For H, the molecular weight is 1.008g/mol
Add all of those values up together to get the molar mass of NaOH being 39.998g/mol.
Hey guys I'm under a lot of pressure to finish my Chemistry assignment before the term ends, and help will be appreciated even if you answer just one.
1. What is the pressure on a gas at 350. K if the pressure is 2.62 atm at 300. K?
2. The volume of a gas at 298K is 0.346 L when the pressure is 201 kPa, what will the volume be when the pressure is 152 kPa at 298K?
3. In a rigid, 6 L container, the pressure of N2 gas is 0.592 atm at 305 K, what temperature will the gas be if the pressure is 0.891 atm?
4. The pressure of a sample of CO2 was 2.00 atm when the temperature was 30.45 ℃, what will the pressure be if the temperature of the sample is heated to 92.01℃?
Explanation:
Hello
I answered all your questions And I explained it to you in the photo sent.
Good luck
I NEED THIS ASAP TODAY PLEASSSSEEEEEE
The gravitational pull of the Moon is much less than the
gravitational pull of Earth. Consider an object with a mass
of 10 kilograms that weighs 22 pounds on Earth.
Which statement describes the object on the Moon?
A. Its weight would be much greater.
B. Its mass would be much greater.
C. Its mass would be the same.
D. Its weight would be the same.
Option C, mass would be same. Only the gravitational pull will be different
What is the momentum of a car with a
mass of 1000 kg traveling at the speed of 2 m/s?
Answer:
The answer is 2000 kgm/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocityFrom the question
mass = 1000 kg
speed = 2 m/s
We have
momentum = 1000 × 2
We have the final answer as
2000 kgm/sHope this helps you
How are compounds with ionic and covalent bonds alike?
A.Both conduct electricity when dissolved in water
B.Both are made up of metals
C.Both have at least some
compounds that can dissolve in water
D.Both have high melting points
Answer:
B
Explanation:
how many pencils are in 1 mole of pencils
Answer:
1 mole of pencil = 6.02X1023 number of pencils
Explanation:
Which statement describes an advantage of asexual reproduction? Asexual reproduction results in variations in DNA. Asexual reproduction causes less Competition for resources. Asexual reproduction is faster than sexual reproduction. Asexual reproduction requires more energy than sexual reproduction.
Answer:
Asexual reproduction is faster than sexual reproduction
Answer:
Asexual reproduction is faster than sexual reproduction which is d
Explanation:
What is the correct name for this compound?
B2H3
Answer:
i hope Boron oxide is the name you're looking for.
can someone tell me how to differentiate if a given salt is acidic, basic, or neutral?
[tex]\bold{\huge{\underline{ Solution }}}[/tex]
Basic Characteristic of acids Acids are sour in taste Acid turns blue litmus paper or solution into red litmus paper or solution Acids are good conductor of electricity because it dissociate into cation in aqueous solution Acids classified into edible acids and non edible acids. Non edible acids are very hazardous Generally, All acids are soluble in water Acids have PH smaller than 7Arrhenius definition of acids :-
According to Arrehinus,
Acids are those substances which when dissolve in water given H positive ions . Then, this hydrogen ions combine with water to form H30 + ionsSecond definition of Acids was given by Bonsted Lowry :-
According to Bonsted Lowry
Acids are the proton donors that is when acids dissociate into water gives hydrogen ions that is H+ ions3rd definition was given by Lewis
According to Lewis
Acids are those substances which have the ability to accept a pair of electrons .Example of Acids
HNO3 :- Nitric acid H2SO4 :- Sulfuric acidHCl :- Hydrochloric acid Basic characterists of bases Bases are bitter in taste Bases turns red litmus paper into blue litmus paper or solution Bases are also good conductor of electricity because on dissociation it produces anion in aqueous solution Bases are also good conductor of electricity When bases are soluble in water then they are known as alkaline baseBases have PH greater than 7Arrehinus definition of bases :-
According to Arrehinus ,
Bases are those substances which when dissolve in water produce OH negative ions that is hydroxide ionsBonsted Lowry definition
According to Bonsted Lowry
Bases are the proton donors as they produce OH negative ions in dissociation in aqueous solutionLewis definition
According to Lewis
Acids are those substances which have the ability to lose electrons that is they are electron donors.Example of bases
Ca(OH)2 :- Calcium hydroxide NaOH :- Sodium hydroxide KOH :- Potassium hydroxide[ Note :- There are so many Lewis acids and bases but they are not Arrhenius or Lowry acids or bases ]
Basic characteristic of salt Salts are the ionic compounds which are composed of acids and bases that cation and anion Salts are generally found in oceans and seas in the forms of crystals As they are composed of acids and bases so they are neutral in nature but the salt of strong acid or weak base is acidic in nature or vice versa Salts are also good conductor of electricity as they form ionic bond Generally, All salts are soluble in water.The PH of common Salt is 7Example of salts
NH4Cl :- Ammonium chloride CuSO4 :- Copper sulphate NaCl :- Sodium chlorideis potato chip crumbs made of atoms?
yes or no, explain why.
Yes. All matter is made of atoms in some way. Even the smallest crumbs are made of quadrillions of atoms. The number of atoms is simply mind boggling.
1 quadrillion = 1,000,000,000,000,000
There are 15 zeros in that number. It might be better to express it as
1 quadrillion = 1.0 * 10^15
Scientific notation compacts large numbers such as this to make it more readable, and allow for faster writing.
Question 8 of 10
Which is the same as 10 x 10 x 10?
A. 103
O B. 102
C. 10
O D. 1010
We know
a×a=a^2Now
[tex]\\ \sf\longmapsto 10(10)(10)[/tex]
10 is 3times[tex]\\ \sf\longmapsto 10^3[/tex]
Option A
Calculate the pH of a 6.3x10-8M solution of H3O+
Considering the definition of pH, the pH of a 6.3×10⁻⁸ M solution of H₃O⁺ is 7.2.
Definition of pHpH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:
pH= - log [H⁺]= -log [H₃O⁺]
The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.
pH in this caseIn this case, you know that [H₃O⁺]= 6.3×10⁻⁸ M. Replacing in the definition of pH:
pH= -log (6.3×10⁻⁸ M)
Solving:
pH=7.2
Finally, the pH of a 6.3×10⁻⁸ M solution of H₃O⁺ is 7.2.
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How would one convert 5 decades to months