Answer:
The hydrogenation of ethene
Ethene reacts with hydrogen in the presence of a finely divided nickel catalyst at a temperature of about 150°C. Ethane is produced. This is a fairly pointless reaction because ethene is a far more useful compound than ethane!
Explanation:
In which beaker or beakers are the particles moving the most slowly?
A. Beakers B and C
B. Beaker C only
C. Beaker a only
D. Beakers A and D
Answer: beakers A and D
Explanation:
These two beakers have the lowest temperatures, meaning the particles move slower than the other two beakers.
Answer:
A and D
Explanation:
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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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
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:
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 many pencils are in 1 mole of pencils
Answer:
1 mole of pencil = 6.02X1023 number of pencils
Explanation:
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.
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
60 points! please answer will mark brainliest! thank you!
A 5.00-wt% aqueous sulfuric acid solution (p=1.03 g/ml) flows through a 45-m long pipe with a 6.0 cm diameter at a rate of 82 L/min. a) What is the molarity of sulfuric acid in the solution? b) How long in seconds) would it take to fill a 55-gallon drum, and how much sulfuric acid (lbm) would the drum contain? c) The mean velocity of a fluid in a pipe equals the volumetric flow rate divided by the cross-sectional area normal to the direction of flow. Use this information to estimate how long (in seconds) it takes the solution to flow from the pipe inlet to the outlet.
Answer:
Explanation:
a )
5 gram of sulfuric acid in 100 gram of solution
volume of 100 gram of solution = 100 / 1.03 ml
= 97.08 ml = .097 L
5 gram of sulfuric acid = 5 / 98 moles = .051 moles
.051 moles in .097 L solution
molarity = .051 / .097 = .525 M .
b ) 55 gallon = 3.7854 x 55 L = 208 L
rate of flow = 82 L / min
time taken to fill the drum = 208 / 82 min = 2.536 min .
volume of sulfuric acid = 208 L
mass = volume x density = 208 x 1000 x 1.03 gram = 214.24 kg
214.24 kg = 214.24 x 2.2 lb = 471.33 lb
c )
cross sectional area = 3.14 x 3² = 28.26 cm²
rate of flow = 82 L / min = 82 x 1000 cm³ / min
= 82000 / 60 cm³ / sec = 1366.67 cm³ / s
velocity = 82 x 1000 / 1366.67 = 60 cm / s = .6 m / s
length of pipe = 45 m
time taken = 45 / .6 = 75 s
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
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
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
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
 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]
The surface tension of water _is because it's molecules form_.
Answer:
Hello! I am very sorry I do not know the exact answer to this but here is some information that may help!
Surface tension in water owes to the fact that water molecules attract one another, as each molecule forms a bond with the ones in its vicinity. This inward net force causes the molecules on the surface to contract and to resist being stretched or broken.
Explanation:
Again I am very sorry I could not give you the answer you were looking for. I hope the information above has helped you even a little! I am very sorry if this is not what you were looking for. Have a great rest of your day or night and good luck on your work!
<3 <3 <3
What is the correct name for this compound?
B2H3
Answer:
i hope Boron oxide is the name you're looking for.
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.
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:
How long would a sample of 26g of Nickel-63 take to decay down to
6.5g?
GIVING BRAINLY TO CORRECT ANSWER !!
is 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.
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 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.
How would one convert 5 decades to months
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
C. boiling
7
Which of these sentence is NOT true regarding heating a substance. *
(1 Point)
A. The speed of the particles increases
B. The space between the particles increases
C. The volume increases
D. The mass increases
Please help me
Answer:
Which of these sentence is NOT true regarding heating a substance?
Your answer is D.The mass increases
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 MgOWhen 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
Which element makes up most of the air we breathe.
When a planet has the illusion of moving backwards or bouncing up and down it is exhibiting what?
Answer: It is exhibiting retrogade motion.