B. Calculate the Pressure of 20.0 mole of helium in a 10.0 L cylinder at 273 K. [a = 0.0341 atm*L^2/mol^2 ; b = 0.0237L/mol ; R = 0.08205 L*atm/mol*K) *
87.3 atm
46.9 atm
55.5 atm
12 kPa
Answer:
46.9 atm
Explanation:
Applying Van der waals equation
P = [nRT/(V-nb)]- (an²/V²)............... Equation 1
Where P = pressure, T = temperature, n = number of moles, V = volume, R = Universal constant, a and b = gas constant
Given: n = 20 moles, R = 0.08205 L.atm/mol.K, T = 273 K, V = 10.0 L, a = 0.0341 atm.L²/mol², b = 0.0237L/mol
Substitute these values into equation 1
P = [(20×0.08205×273)/(10-20×0.0237)]-(0.0341×20²/10²)
P = (447.993/9.526)-0.1364
P = 47.028-0.1364
P = 46.9 atm
In a _____ molecules move just enough to stay close together but not to stick
Answer:
I think it might be liquid
Answer: in a molecular molecules move just enough to stay close together but not to stick
Explanation:
The distance between an oxygen and hydrogen in a water in 95.98.What is the distance in meter nanometer and centimeters
Answer:
9.598 × 10⁻¹¹ m
0.09598 nm
9.598 × 10⁻⁹ cm
Explanation:
Step 1: Given data
Distance between oxygen and hydrogen in water (d): 95.98 pm
Step 2: Convert "d" to meters
We will use the conversion factor 1 m = 10¹² pm.
95.98 pm × 1 m/10¹² pm = 9.598 × 10⁻¹¹ m
Step 3: Convert "d" to nanometers
We will use the conversion factor 1 m = 10⁹ nm.
9.598 × 10⁻¹¹ m × 10⁹ nm/1 m = 0.09598 nm
Step 4: Convert "d" to centimeters
We will use the conversion factor 1 m = 100 cm.
9.598 × 10⁻¹¹ m × 100 cm/1 m = 9.598 × 10⁻⁹ cm
How many moles of helium are inside a 7.3 L party balloon at STP?
Answer:
0.326 mol. is the answer.
Explanation:
No. of moles = Volume (L) / Volume at STP
N = 7.3 / 22.4
N = 0.326 moles
An ionic compound has sodium ions bonded to an oxygen ion. What is the compound's name?
What am I? 2. I have 7 valence electrons and have 2 more protons than "phosphorus. What am I? 3. I am in Period 5 and have properties similar to my favorite cousin, gold. What am I? 4. I am the only element with no neutrons in my nucleus. What am I? 5. I am the only element in Period 3 that has 8 electrons in my outermost energy level. What am I? 6. I am the most massive element on the Periodic Table to have electrons in only one energy level. What am I? 7 I have the smallest atomic number of all the elements that have electrons in three different energy levels? What am I?
Answer:
2. chlorine
3. Copper??
4. Isotope
5. sodium, magnesium, aluminum, silicon, phosphorus, sulfur, or argon
6. Oganesson
7. Hydrogen
Hope these are right!
Can someone please explain what to do it’s late at night and I need sleep but I forgot I had this homework please help me with a few questions I’m desperate :(
Answer:
1) it takes 13 second
2) 2100 miles
3) 40 miles / hours
4) 730 meters
Is a solution that has a pH of 7.52 acidic or basic?
Answer:
on the PH scale anything with a ph of 1-7 is acidic, anything 7-14 is basic, in this case the solution mentioned in the question is basic.
Answer:
Well, technically its considered neutral but since it doesn't exactly fall into a certain category, but its not exactly a basic either, so I would say that it would be acidic.
Explanation:
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Hiiii- Are you asking what the element of Hu is???
If so- it's Hundium.
...
If this was just a random keyboard spam of a question, then Huuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu to you too
Anatom of an element has no electron,will that atom have any mass or not? Can antom exist
without electron? if so give an example.
Answer:
Generally, all atoms of elements contain three sub-atomic particles- Protons(Positively-charged), Neutrons(Neutral) and Electrons(Negatively-charged).
The Magnitude of the Positive Charge possessed by the Protons and the Magnitude of the Negative Charge possessed by the Electrons cancel each other, which make the atom electrically neutral.
Hence,
Without any electrons, the magnitude of the positive and negative charges wouldn't balance, and the atom would be unstable and disintegrate almost immediately. Hence, all stable atoms should have electrons revolving around them, where the number of protons and electrons are the same, under normal conditions.
To Conclude,
Every atom of an element will have electrons arranged in different shells, or matter couldn't exist without electrons.
At equilibrium, the amount of product is equal to amount of reactant
True o False
The process of an element breaking down over time, allowing geologists to get the absolute age is called _________.
Answer:
radioactive decay
Explanation:
if a solution has a pOH of 5.2 the pH of the solution is
Answer:
ph=5.2 solution is acidic
Matches=from Chemical energy to light energy+heat energy
Explanation:
A matchstick has a lot of chemical energy stored in it. When the match is struck, it burns and the chemical energy in it produces heat energy and light energy.
brainliest and follow and thanks
Which layer of the earth is the coolest in temperature?
A. Outer core
B. Crust
C. Mantle
D. Inner core
Answer:
B) Crust
Explanation:
It's the farthest layer from the core listed.
Answer:
B) Crust
Explanation: it is the lowest from the center of the earth.
In cellular respiration the energy starts as ____________ energy and ends up as ______________ energy.
Answer: food, chemical
Explanation:
Cellular respiration is a process in which the food or glucose reserve is oxidized so as to produce chemical form of energy in the form of ATP, that is used by the body's cell to perform metabolic activities within the cell. During this process the glucose in the presence of oxygen is converted into water and carbon dioxide and the chemical form of energy so produce is called adenosine triphosphate or ATP. Thus in the end chemical energy is produced.
An unknown substance with a mass of 5 grams releases 16.1 joules of energy when undergoing a temperature decrease of 7 degrees Celsius. What is the specific heat of that substance and what substance is it?
Answer:
0.46 J/g degrees C, Iron
Explanation:
16.1 J = 5 g x c x 7 degrees C
c = 16.1 / 5 x 7 = 0.46
Answer: 0.46 J/g degrees C, Iron
Calcium carbonate + hydrochloric acid forms copper ___ + water + carbon dioxide
What does it form copper what please help me
Answer:
The answer copper carbonate
Science please help. I will add you and please don’t give me any random websites
Answer:
C
Explanation:
Answer:
D)
Explanation:
On land, volcanoes form when one tectonic plate moves under another. Usually a thin, heavy oceanic plate subducts, or moves under, a thicker continental plate. When this happens, the ocean plate sinks into the mantle.
What volume of a 40.0 % by volume acetone solution can be
made with 20.0 mL of acetone?
Answer:
50 milliliters of acetone solution
Explanation:
If a solution is 40% by volume of acetone, then we have 40 mL of acetone in a 100 mL solution. So if we have 20 mL of acetone, we get: 100 mL solution 40 mL ( CH3) 2CO⋅
20mL (CH3) 2CO =50mL solution
The volume percent of 40% indicates that 40 ml of acetone is present in 100 ml solution. Then, 20 ml acetone can be made into 50 ml solution.
What is volume percentage ?Volume percentage is a common term used to express the concentration of a solution. Volume percentage of a solution is the ratio of the volume of the solute to the volume of the solvent multiplied by 100.
The volume percentage of the solution measures how much volume of the solute is present in 100 ml of the solution. Thus a 50% by volume solution is 50 ml solute in 100 ml solution.
Given that volume percentage of acetone = 40%.
that is 40 ml of acetone is present in 100 ml of the solution.
Therefore, the volume of the solution containing 20 ml of acetone is :
(20 × 100)/40 = 50 ml.
Therefore, 50 ml of 40% by volume o solution can be made by 20 ml of acetone.
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PLEASE HELL ASAP WILL GIVE BRAINLEAST TI CORRECT ANSWER
Answer:
Rabbbits are scared so if there is an increase in the snake population they would try and hide and run from it bur hawks also prey on rabbits but not every hawk so Im going with bthe snake answer .
Explanation:
I have a question for us gals, is it hard for all of you when you try to get your crushes attention and he/she just keeps ignoring you to the point where you could just give up?
Answer:
Yes it is hard. For some of us. I already gave up, but now hes coming back. Id say sometimes its useless to get his attention if he never even pays attention to you anyways. It sucks because its so hard to get then to notice you for once.
Explanation:
Nitrogen oxide is a gas that is injected into potatoes chip bags right before they are sealed. How
many moles of nitrogen oxide are in a bag at 760 mmHg, 273 K, and has a volume of 1.0 liter?
(2 sig figs)
Explanation:
[tex]pressure = 760mm \: of \: mercury \\ = 101325 \: pascals \\ from \: PV = nRT \\ 101325 \times 1 = n \times 8.314 \times 273 \\ n = 44.6 \: moles[/tex]
Answer:
740
Explanation:
The nitrogen is combined with it.
If I have a 50 liter container that holds 45 moles of gas at a temperature of 200 0C, what is the pressure inside the container?
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What mass of methane gas (CH4) is required in order to follow the Law of
Conservation of Mass?
Answer:
2.3g
Explanation: my mom is a teacher
CH₄ + 2O₂ → CO₂ + 2H₂O For this reaction the mass of methane gas (CH4) is required in order to follow the Law of Conservation of Mass is 2.3 gram. Therefore, option D is correct.
What is the Law of Conservation of Mass ?The Law of Conservation of Mass states that the total mass of the reactant is exactly equal to the total mass of the product.
It is also state that in a chemical reaction mass is neither created nor destroyed. For example, the carbon atom in coal gets carbon dioxide when it is burned.
This law is important in understanding and production of various chemical reactions. If researchers experience the identities alongside the quantities of the reactants for any particular reaction.
According to the Law of Conservation of Mass, In given combustion reaction to obey this law the mass of reactant is 2.3 grams.
Thus, option D is correct.
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Describe how wave frequency changes across the electromagnetic spectrum, from radio waves to gamma rays
By increasing the frequency which changes the wavelength, frequency changes across the electromagnetic spectrum, from radio waves to gamma rays.
What is the electromagnetic spectrum?The electromagnetic spectrum is a wide range of frequencies that vary depending upon the wavelength of the spectrum and somehow the energy of photons also affects the frequencies and wavelengths.
There are three types of electromagnetic spectrum hydrogen spectrum emission spectrum due to the emission of light and absorption spectrum due to absorption of light.
Therefore, frequency changes across the electromagnetic spectrum, from radio waves to gamma rays are By increasing the frequency which changes the wavelength.
Learn more about the electromagnetic spectrum, here:
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Please help I need all 3... and no links!
A bright-line spectrum contains a line equivalent to a wavelength of 518 nanometers. Determine:
a) the wavelength, in meters
b) the frequency, in Hz
c) the energy, in Joules
What is the best common way to convert fossil fuels into energy?
a. oxidation
b. reaction
c. combustion
d. neutralization
If a chemist dilutes 2L of 0.700M solution to 3 L what will be the new concentration (M)
Answer:
Molarity of our solution= 0.46=0.5
Explanation:
When diluting a solution we can use the formula: 1 1 = 2 2
= M= Molarity of the solution
=V=volumes
On the left side, we'll put what we know/already have and on the right side of the formula we'll put down what we want to dilute it to.
Let's plug in what we already know.
(0.700M)(2L) = (M2)(3L)
Solve for M2 by dividing both sides by 3 so M2 will be by itself.
(0.700M)(2L)/(3L) = M2
M2= 0.46, we can round it up to 0.5
what are the mixtures of chemistry
