Answer:
3.6 atm
Explanation:
10. A balloon is blown up to a volume of 18 L at a pressure of 1.0 atm and
298 K. What would the pressure inside the balloon be when its volume
becomes 4.0 L and its temperature is 239 K?*
PV/T = P'V'/T'
(18 X 1)/298 =(P' X 4)/239
so
P' = (18 X 239)/(298 X 4)= 3.6 atm
P'=(18 X 239)/(298 x 4) =
Which statement is correct?
Natural processes happen spontaneously when they decrease the entropy of a system because entropy increase is counteracted by the flow of enthalpy from high temperatures to low temperatures.
Among solids, liquids, and gases, solids generally have the highest entropy because solid particles are the least mobile, and entropy is inversely related to mobility of particles.
Any change that increases the number of particles in a system increases entropy because it increases the randomness and disorder of the system.
Dissolving table salt (NaCl) in water leads to a decrease in entropy because salt particles, which are numerous individual crystals in solid form, become a homogenous solution in water.
Answer:
Any change that increases the number of particles in a system increases entropy because it increases the randomness and disorder of the system.
Explanation:
Imagine dropping a glass pitcher on a hard surface. The pitcher breaks into numerous shards. If the shards were collected and dropped again, they would tend to break into smaller shards; they would not reassemble themselves into a pitcher. In the universe, there is a tendency for order to be replaced with disorder. This tendency is related to a concept called entropy. The formal definition of entropy is a measure of the degree of randomness and disorder in a system.
Argon has a pressure of 34.6 atm. It is transferred to a new tank with a volume of 456 L and pressure of 2.94 atm. What was the volume of the original container?
Answer:
38.75 L
Explanation:
From the question,
Applying Boyles Law,
PV = P'V'....................... Equation 1
Where P = Original pressure of the Argon gas, V = Original Volume of Argon gas, P' = Final pressure of Argon gas, V' = Final Volume of Argon gas.
make V the subject of the equation
V = P'V'/P.................... Equation 2
Given: P = 34.6 atm, V' = 456 L, P' = 2.94 atm.
Substitute these values into equation 2
V = (456×2.94)/34.6
V = 38.75 L
which of the following would remain a liquid longest as the temperature continues to drop? propane, octane, hexane, ethane
HELP!!! WILL GIVE BRAINLYEST!!!!!! Record the Gas concentration associated with each of these time periods. (Note: ppm= parts per million)
Answer:
Explanation:
u need to go to the Greenhouse Effect Simulation (link is in ur Q).
open it and select the Greenhouse effect tab. Note that the concentration of various atmospheric gases during past eras can be determined by looking at gases trapped in ancient ice, such as that found in Antarctica.
On the right hand side panel of the simulation, under “Atmosphere during,” you can select Today, 1750, and Ice Age as historic time periods.
run simulations n collect the gas composition data.
Answer:
Explanation:
The question provides a link to the Greenhouse Effect Simulation. Results are from that:
Time Period H2O %RH CO2 ppm CH4 ppm N2O ppm
Today 58F 70% 338ppm 1843ppm 0.317ppm
1750 58F 70% 280ppm 0.730ppm 0.270ppm
Ice Age 36F ? 180ppm 380ppm 0.215ppm
is RbCl soluble or insoluble in water
Answer:
Rubidium Chloride is an excellent water soluble crystalline Rubidium source for uses compatible with chlorides.
Compound Formula: ClRb
Melting Point: 715 °C
Boiling Point: 1,390 °C
Explanation:
HELP PLEASE
an unknown gas has a pressure of 121.6 kPa, a volume of 31 L and a Temperature of 256K. How many moles of gas
are there?
Answer:
0.031moles
Explanation:
ok so it would help if I knew the marks but 1 mole = 1000L so if the volume was 31L then if you convert you will get that answer
The moles of gas at the given sample of gas is 1.7 moles.
What is ideal gas equation?Ideal gas equation gives idea about the behavior of gas at different condition & represented as:
PV = nRT, where
P = pressure = 121.6 kPa = 1.2 atmV = volume = 31 Ln = moles = ?R = universal gas constant = 0.082 L.atm / K.molT = temperature = 256KOn putting all these values, we get moles as:
n = (1.2)(31) / (0.082)(256) = 37.2 / 20.9
n = 1.7 moles
Hence required moles of gas is 1.7 mole.
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+
What category would the following amino acids be placed in and are they in the Lord
configuration? (2 marks)
COO-
A)
COO-
B)
H2N-C-H
H-C-NH3
CH2
CH2
OH
give a reason why it is not advisable to heat magnesium before heating ammonium nitrate
Answer:
it can result in an increasing risk of the accumulation of decomposition products, self-heating (from the heat released by the slow decomposition reactions)
Magnesium can result in an increased risk of the accumulation of decomposition products, self-heating (from the heat released by the slow decomposition reactions)
What is ammonium nitrate?Ammonium nitrate is used commonly in fertilizers; in pyrotechniques, herbicides, and insecticides; and in the manufacture of nitrous oxide.
When ammonium nitrate is heated, it decomposes exothermically into nitrous oxide and water.
Hence, Magnesium can result in an increased risk of the accumulation of decomposition products, self-heating (from the heat released by the slow decomposition reactions)
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HELP PLEASE!!!!! 10 POINTS
What does the third quantum number (ml) describe?
Answer:
A. The specific orbital within a sublevel
Explanation:
the third quantum number is also called the magnetic quantum number ([tex]m_{l}[/tex]) and it represents the number of orbitals within a subshell.
Please help me find the answer , thank you.
Answer:
the answeer is definitely silicon.
Which of the following elements has the largest atomic number?
O tellurium (Te)
lodine (0)
Otin (5)
O antimoney (5b)
Answer:
iodine is 53
tellurium is 52
antimony is 51
Otin Is 50
Explanation:
6. Soap contains 76.5% C, 11.3% O, and 12.2% H and the MW = 847, what is the
molecular formula?
Answer:
the molecular formula of the soap is C₅₄H₁₀₂O₆
Explanation:
Given;
composition of carbon, C = 76.5%
composition of oxygen, O = 11.3%
Composition of hydrogen, H = 12.2%
The empirical formula is calculated as follows;
C: 76.5% / 12 O: 11.3% / 16 H: 12.2% / 1
= 6.375 = 0.706 = 12.2
Divide through by the least number (0.706);
= 6.375/0.706 = 0.706 / 0.706 = 12.2 / 0.706
= 9 = 1 = 17
The empirical formula = C₉H₁₇O
The molecular formula is calculated as follows;
(C₉H₁₇O)n = 847
(9 x 12 + 17 x 1 + 16 x 1)n = 847
(108 + 17 + 16)n = 847
141n = 847
n = 847/141
n = 6
The molecular is (C₉H₁₇O)6 = C₅₄H₁₀₂O₆
Therefore, the molecular formula of the soap is C₅₄H₁₀₂O₆
Help! Is there a way to email outlook support for help? If so please comment their email address, as I can't call them on their hotline right now.
Thank you, so much in advance! :)
Answer:
Explanation:
Even if you have a Hotmail email address, you now use the Outlook.com interface to ... I searched and found a Hotmail support number, but is it legit? ... one from Leo's e-mail, I receive a message from windows stating it can't find the site.
When two objects come in contact with each other, friction occurs and
a
both objects change directions
b
both objects will receive a certain amount of thermal energy and heat up
c
one object will heat up while the other cools down
d
both objects immediately cool down to room temperature
Answer:
b
both objects will receive a certain amount of thermal energy and heat up
How many moles of C6H12O6 does 8.2 x 1023 molecules represent
Answer:
i.e. mass of 1 mole of glucose, C6H12O6 = (6 × 12.01 + 12 × 1.01 + 6 × 16.00) g = 180.18 g (using atomic weight data to 2 decimals) 1 mole of carbon atoms weighs 12.01 g and there are 6 moles of C atoms in 1 mole of glucose, so the mass of carbon in 1 mole of glucose = 6 × 12.01 g = 72.06 g.
THIS IS A THREE PART QUESTION IF YOU CAN HELP IT WOULD BE REALLY APPRECIATED SO I DONT FAIL.
1. If I add 2.65L of water to 245 grams of sodium acetate, what is the molarity of the NaC2H3O2 solution?
A. 10.8 m
B. 1.13 m
C. 1.08 m
D. 92.4 m
2. If I add 2.65 L of water to 245 grams of sodium acetate, what is the % by mass of NaC2H3O2 in this solution?
A. 8.46%
B.1.12%
C.10.8%
D.9.25%
3. If I add 2.65 L of water to 245 grams of sodium acetate, what is the mol fraction of NaC2H3O2 in this solution?
A. 0.203
B. 0.0846
C. 0.108
D. 0.0199
Answer:
1. B = 1.13M
2. A. 8.46%
3. D = 0.0199
Explanation:
1. Molarity of a a solution = number of moles of solute/ volume of solution in L
Number of moles of solute = mass of solute/molar mass of solute
Molar mass of NaC₂H₃O₂ = 82 g/mol, mass of NaC₂H₃O₂ = 245 g
Number of moles of NaC₂H₃O₂ = 245 g / 82 g/mol = 2.988 moles
Molarity of solution = 2.988 mols/ 2.65 L = 1.13 M
2. Percentage by mass of a substance = mass of substance /mass of solution × 100%
Mass of 2.65 L of water = density × volume
Density of water = 1 Kg/L = 1000 g/L; volume of waterb= 2.65 L
Mass of water = 1000 g/L × 2.65 L = 2650 g
Mass of solution = mass of water + mass of solute = 245 + 2650 =2895 g
Percentage by mass of NaC₂H₃O₂ = 245/2895 × 100% = 8.46%
3. Mole fraction of NaC₂H₃O₂ = moles of NaC₂H₃O₂/moles of solution
Moles of water = mass /molar mass
Mass of water = 2650 g; molar mass of water = 18 g/mol
Moles of water = 2650 g / 18 g/mol = 147.222 moles
Moles of solution = moles of solute + moles of water = 147.222 + 2.988 = 150.21
Moles of NaC₂H₃O₂ =2.988 moles
Moles fraction of NaC₂H₃O₂ =2.988/150.21 = 0.0199
An eraser is an example of —
Group of answer choices
an insulator
a closed circuit
a conductor
an open circuit
Answer:
Insulator
Explanation:
An eraser can't conduct electricity, which makes it an insulator.
Explain the process of photosynthesis in a well-written paragraph containing complete sentences. Use all of the following words:
xylem
phloem
carbon dioxide
stomata
sunlight
water
oxygen
sugar
Answer:
Photosynthesis is the process takes place in green plants in which the plants convert the carbon dioxide and water into the sugar molecule and oxygen in presence of the sunlight. The sunlight is trapped by the chlorophyll pigment, carbon dioxide uptake is facilitated by the stomata present on the leaves in the epidermis.
The water moves from the roots to the leaves and stem where it is used for photosynthesis and transpiration. The movement of water is through the xylem and sugar is move through the phloem from the leaves to a different part of the plant for nutrition and further process.
According to kinetic molecular theory, collisions between gas particles in a sample of an ideal gas 1. increase the energy content of the gas sample 2. produce strong attractive forces between the gas particles 3. result in a net loss of energy by the gas sample 4. transfer energy between the gas particles
Answer:
should you prove this or explain or pick the correct answer
According to the kinetic molecular theory, collisions between gas particles in a sample of an ideal gas: Transfer energy between the gas particles. Hence, option 4 is correct.
What is kinetic theory of gases ?According to kinetic theory of gases, when gas particles collide with each other, they transfer energy between themselves. Some collisions will result in the transfer of kinetic energy from one particle to another, while others may result in a transfer of potential energy due to the intermolecular forces between the particles.
However, the total energy of the gas particles is conserved during these collisions, so there is no net loss or gain of energy by the gas sample as a whole.
The kinetic molecular theory also states that ideal gas particles do not have any significant attractive or repulsive forces between them, so option 2 is incorrect.
Additionally, collisions between gas particles do not increase the energy content of the gas sample (option 1) or result in a net loss of energy by the gas sample (option 3).
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Please help me out ........
Answer:c
Explanation:
1.
If the hydrogen ion concentration of a solution is 1.30 x 10*M
What is the pH of the solution?
Answer:
h
Explanation:
gy
can you guys help me :) ?
winner takes all
Answer:
1. Ag2CO3
2.Ba3(PO4)2
3. Cu(OH)2
4. AL
Explanation:
If 50 milliliters of 0.50 M HCl is used to completely neutralize 25 milliliters of KOH solution, what is the molarity of the base?
Answer:
0.25 M
Explanation:
HELP ASAP 10 POINTS
What type of interference caused a "super crest" to form during Young's experiment?
Constructive interference
Doppler interference
Destructive interference
Operational Interference
Answer:
the answer is destructive interference
72.2% of element X is mass number 85. 27.8% is mass number
87. What is the average atomic mass of element X? (Round to
the correct number of significant figures.)
Answer:
11
Explanation:
A gas bubble occupies 14.0 mL, what is this volume into L?
plss help me in this question
Answer:
[tex]m_{CO_2}=0.88g[/tex]
Explanation:
Hello there!
In this case, since we are talking about a decomposition reaction whereby calcium carbonate is decomposed to calcium oxide and carbon dioxide according to the following chemical equation:
[tex]CaCO_3\rightarrow CaO+CO_2[/tex]
Next, we must recall the law of conservation of mass which states that matter cannot be neither created nor destroyed so the mass of calcium carbonate equal the addition of the mass of both calcium oxide and carbon dioxide:
[tex]m_{CaCO_3}=m_{CaO}+m_{CO_2}[/tex]
Which must be solved for the mass of carbon dioxide as we are given those of calcium carbonate and calcium oxide:
[tex]m_{CO_2}=m_{CaCO_3}-m_{CaO}\\\\m_{CO_2}=2.00g-1.12g\\\\m_{CO_2}=0.88g[/tex]
Best regards!
For a reaction to be in equilibrium.... *
A. concentration of reactants and products remain constant
B. concentration of reactants and products must be the same
C. the rate of forward reaction is not equal to the rate of backward reaction.
Answer: C) the rate of forward reaction is not equal to the rate of backward reaction. This should be the answer.
Explanation:
How many grams are in 1.46 mol K2O?
Answer:
94.196 grams
Explanation:
Answer:
94.196 grams
Explanation:
In any engineering design problem, the first step is to understand the problem and identify one or more possible solutions. In this task, you’ll analyze the problems you face as the chemical engineer challenged with setting up the ammonia-making process. Recall the chemical equation for producing ammonia:
N2 + 3H2 ⇌ 2NH3 + energy
1.Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium.
Answer:
Explanation:
About 2,070 results (0.60 seconds)
Answer is: at lower temperatures the reaction rate would decrease. The lower is the temperature, the slower the reaction becomes. ... Because this is exothermic reaction (enthalpy is less than zero), at lower temperatures, the equilibrium is in favor of ammonia, but the reaction doesn't proceed at a detectable rate.
Hi,
let us go through the question again
N2 + 3H2 ⇌ 2NH3 + energy
Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium.
So I would approach this question on the basis of effect of each of the reactants and products concentration on the equilibrium synthesis of ammonia.
If the concentration of any reactant is increased, the yield of ammonia is increased.
If the concentration of ammonia is reduced by removing it as it forms, the yield will as well be increased.
This reaction also yields heat meaning it is an exothermic reaction, so when we increase the temperature, the yield will be reduced. Hence it is favored by low temperature.