Answer:
31.23 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
we have
[tex]n = \frac{1.88 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 31.229235...[/tex]
We have the final answer as
31.23 molesHope this helps you
B) A company president would like to offer a 4.00 L cylinder containing 500 g of chlorine in the new catalog. The cylinders you have on hand have a rupture pressure of 40 atm. Use both the ideal gas law and the van der Waals equation to calculate the pressure in a cylinder at 25°C. Given a = 6.58 L2 atm mol-2 and b = 0.056 L mol-2, Cl =35.5. (5 marks)
Answer:
43.1atm is the pressure using gas law and 27.2atm using Van der Waals Law.
Explanation:
Ideal gas law is:
PV = nRT
Where P is pressure in atm
V is volume = 4.00L
n are moles of the gas (For chlorine Molar Mass: 70.90g/mol):
500g * (1mol / 70.90g) = 7.052 moles
R is gas constant = 0.082atmL/molK
T is absolute temperature = 25°C + 273 = 298K
To solve the pressure, P:
P = nRT/V
P = 7.052mol*0.082atmL/molK*298K / 4.00L
P = 43.1atm is the pressure using gas law.
Van der Waals equation is:
[tex]P + a(\frac{n}{V})^2 * (V-nb) = nRT[/tex]
Where a is 6.58L²atm*mol⁻²
b = 0.056Lmol⁻²
Solving for pressure:
[tex]P + a(\frac{n}{V})^2 = \frac{nRT}{(V-nb)}[/tex]
[tex]P = \frac{nRT}{(V-nb)}-a(\frac{n}{V})^2[/tex]
[tex]P = \frac{7.052mol*0.082atmL/molK*298K}{(4.00L-7.052mol*0.056L*mol)}-6.58L^2mol^{-2}(\frac{7.052mol}{4.00L})^2[/tex]
P = 172.323 / 3.6051 - 20.4866
P = 27.2atm using Van der Waals Law
I really need help with this chemistry assignment multiple choice
Answer:
b option to is correct and answer bro
[tex] \huge\mathcal\colorbox{red}{\color{pink}{質問 ↷}}[/tex]
what are Noble Gases?
Answer:
any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.
Explanation:
The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Which of the following substances
represents a compound?
A. saline: NaCl and H,0
B. helium: H
c. carbon dioxide: CO
D. iron; Fe
PLEASE HELP NEED AN ANSWER ASAP!!!!
PICTURES BELOW!!!!
Two graphs above show a catalytic reaction, which color of balls represents a catalyst?
Select one:
a. Purple
b. Blue
c. Red
d. Green
Help me get it right and no links
Answer:
i think the second answer " fish migration might be prevented" might possibly be your answer
Which statement about light energy is incorrect?
A. Light energy travels as electromagnetic waves
B. We can only see light if the wavelengths are in a
certain part of the electromagnetic spectrum
C. Refraction is when light bends as it passes through
another medium
D. Light is absorbed at a higher rate if the color of the
object it hits is brighter
Answer:
The correct answer is C
Explanation:
light refracts whenever it travels at an angle into a substance with a different refractive index(optical density)
A 2.2 M solution is made by with 0.45 moles of a solute. What is the final volume of this solution?
Answer: The final volume of this solution is 0.204 L.
Explanation:
Given: Molarity of solution = 2.2 M
Moles of solute = 0.45 mol
Molarity is the number of moles of solute present divided by volume in liters.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}[/tex]
Substitute the values into above formula as follows.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\2.2 M = \frac{0.45}{Volume}\\Volume = 0.204 L[/tex]
Thus, we can conclude that the final volume of this solution is 0.204 L.
890J of heat are applied to a piece of aluminum, causing a 4.6°C increase in its temperature. The specific heat of aluminum is 0.902 J/g°C. What is the mass of aluminum?
Question 12 options:
175g
3,693g
214g
0.00220g
Answer:
214
Explanation:
Q=mco
Q=heat
M is mass
C is specific heat
O is increased in temperature
The following chemical equations are organized by reaction type. You must balance each reaction, and show your work
Answer:
lets be honest
Explanation:
no one knows and this is worthless to answer for the worth of 5 points
Which of the following can be used to detect the presence of an acid?
A. All of the answers are correct
B. blue litmus paper
C, a red cabbage solution
D. an indicator
Substances that can carry electric current under some conditions but not under others are called semiconductors.
HELPPPPPP!!!! ILL MARK YOU BRAINLIEST!
A cube has a mass of 100g and each side is 5cm. What is its density?
What is a group of words called that contains elther a subject or a verb, but not both?
Answer:
Phrase
Explanation:
Phrases don't have both, but clauses do.
WORTH 20 POINTS!! Need answer ASAP
Answer:
i cant see the image im good at chem if you can write it down in the comments ill answer it
Explanation:
Which process is exothermic?
a) the vaporization of water b) the freezing of water c)the sublimation of dry ice d ) the boiling of liquid nitrogen
Answer:
Freezing of water
Explanation:
When water becomes a solid it releases heat into its surroundings (warming it up).
WILL GIVE BRAINLIEST ANSWER!!!
How many moles of hydrogen are required to produce 6 moles of water?
Answer: 6 moles
Explanation:
The balanced equation for this reaction is [tex]2\text{H}_{2}+\text{O}_{2} \longrightarrow 2\text{H}_{2}\text{O}[/tex].
This means that for every 2 moles of water produced, 2 moles of hydrogen are consumed.
Thus, if 6 moles of water are produced, this means 6 moles of hydrogen are consumed.
I need help cause this teacher won’t stop cursin
Which of the following is a way to decrease the pressure of a gas?
A. Increase the number of molecules
B. Increase the volume
C. Decrease the volume
Answer:
b
Explanation:
because pressure is inversely proportional to volume.
Also with a larger volume the gas particles will collide less on each other and the walls of the container
A way to decrease the pressure of a gas is to decrease the volume.
What are ways to increase the pressure of a gas?
Three Ways to Increase the Pressure of a Gas
Increase the amount of gas.Increase the temperature of the gas.Decrease the volume of the gas.What are the 3 factors that affect gas pressure?Temperature, pressure, volume, and the amount of a gas influence its pressure.
Learn more about gas laws here https://brainly.com/question/25290815
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why hydroxide an oxidation reaction??
Answer:
sorry I didn't know this one i did all the work and stuff and still couldn't get it sorry
Does someone know the answers?
Answer:
b)sugar and water : Sedementation
d) salt and water : evaporation
If I dilute 213 mL of 9.22 M H2SO4 to 390 ml, what would be the concentration (molarity) of the new solution?(round your answer to the hundredths
place)
HELLOPPPPP PLEASEEE ):
Answer:
5.0 moles
Explanation:
213/390 x 9.22 = 5.04
Round to least sig fig (390 ml)
5.0
help me get this right no links
Answer:
The moons gravitational pull on Earth
help me get this right no links
Which field of study examines homologous structures?
A) Genetics
B) Embryology
C) Comparative Anatomy
D) Physics
Name two metals which will not liberate hydrogen from
dilute tetraoxosulphate(vi) acid.
To solve such this we must know the concept of double displacement reaction. Therefore, copper (Cu) and silver (Ag) would not liberate hydrogen from dilute tetraoxosulphate(vi) acid.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Copper (Cu) and silver (Ag) would not liberate hydrogen because they are less reactive than hydrogen since their standard reduction potential is higher.
Therefore, copper (Cu) and silver (Ag) would not liberate hydrogen from
dilute tetraoxosulphate(vi) acid.
Learn more about the chemical reactions, here:
https://brainly.com/question/3461108
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When precipitation falls in summer, sometimes wind pushes it back up into freezing temperatures before falling again. What will most likely occur when this happens?
A.
hail will fall
B.
rain will fall
C.
sleet will fall
D.
snow will fall.
Answer:
A
Explanation:
hail will fall push it back up making it bigger comes back down
How many molecules are there in 24 grams of HSO₃?
Answer:
1.2×1023 molecules.
hope it helps
why should the wearing of uniforms be discontinued in highscho
A .332 mold sample of gas at a constant pressure and temperature has a volume of 150.0mL. If the volume of the gas is decreased to 50.0mL, how many moles of the gas will remain
Answer:
0.111 mol
Explanation:
We can solve this problem by using Avogadro's law, which states that at constant pressure and temperature:
V₁n₂=V₂n₁Where in this case:
V₁ = 150.0 mLn₂ = ?V₂ = 50.0 mLn₁ = 0.332 molWe input the data given by the problem:
150.0 mL * n₂ = 50.0 mL * 0.332 molAnd solve for n₂:
n₂ = 0.111 mol