Answer:
C. When melted rock solidifies.
Ammonia has been studied as an alternative "clean" fuel for internal combustion engines, since its reaction with oxygen produces only nitrogen and water vapor, and in the liquid form it is easily transported. An industrial chemist studying this reaction fills a tank with of ammonia gas and of oxygen gas, and when the mixture has come to equilibrium measures the amount of water vapor to be . Calculate the concentration equilibrium constant for the combustion of ammonia at the final temperature of the mixture. Round your answer to significant digits.
Answer:
0.364
Explanation:
Let's do an equilibrium chart for the reaction of combustion of ammonia:
2NH₃(g) + (3/2)O₂(g) ⇄ N₂(g) + 3H₂O(g)
4.8atm 1.9atm 0 0 Initial
-2x -(3/2)x +x +3x Reacts (stoichiometry is 2:3/2:1:3)
4.8-2x 1.9-(3/2)x x 3x Equilibrium
At equilibrium the velocity of formation of the products is equal to the velocity of the formation of the reactants, thus the partial pressures remain constant.
If pN₂ = 0.63 atm, x = 0.63 atm, thus, at equilibrium
pNH₃ = 4.8 - 2*0.63 = 3.54 atm
pO₂ = 1.9 -(3/2)*0.63 = 0.955 atm
pH₂O = 3*0.63 = 1.89 atm
The pressure equilibrium constant (Kp) is calculated with the partial pressure of the gases substances:
Kp = [(pN₂)*(pH₂O)³]/[(pNH₃)²*]
Kp = [0.63*(1.89)³]/[(3.54)²*]
Kp = 4.2533/11.6953
Kp = 0.364
If 22.4L = I moles How many liter of CO2 are produced if you produce 9.6 moles of CO2?
Answer:
215 moles
Explanation:
[tex]9.6mol CO_{2} (\frac{22.4 L CO_{2}}{1 mol CO_{2}} ) = 215 L CO_{2}[/tex]
What is the hydrogen ion concentration ([H']) of a substance with a pH of 4.91?
Answer:
The pH of a solution is a measure of the concentration of hydrogen ions in the solution. A solution with a high number of hydrogen ions is acidic and has a low pH value. A solution with a high number of hydroxide ions is basic and has a high pH value. The pH scale ranges from 0 to 14, with a pH of 7 being neutral.
Na + H2O = NaOH
Balance the following equation
Answer:
Na+H2O =NaO+ H2
Explanation:
Because nitrogen is one , so it is balanced. And Oxygen is one,it is balanced. And Hydrogen is 2 ,and hence it is also balanced.
five good habit to clean our surrounding
Answer:
Explanation:
Invest in a reusable water bottle. ...
Bring your own reusable cup. ...
Refuse single-use items. ...
Avoid products with microbeads. ...
Shop in bulk
How much more acidic/more H+ concentration is a pH of 6 than pH of 8
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Answer: 1000x
Explanation:
I hope this helped!
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What is the other product for this reaction? Hbr + NaOH —> ( select 2)
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Answer: HBr + NaOH = nabr + h2o
Explanation:
I hope this helped!
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Convert 146 calories to kilojoules need to know ASAP
What are the differences between an atom, a molecule, and a compound?
Answer:
Atoms are the thing that make up molecules and compounds. Molecules contain two or more atoms and are held together by covalent bonds, whereas compounds are held together by ionic bonds. Two or more elements bonded together through ionic attraction.
Explanation:
If you just want points just say so this can lead me to failing 10th if I don’t pass this quiz so if you don’t know just say so I understand you want points I just don’t wanna fail Ocean acidification is a consequence that occurs when the equilibrium between CO2
CO
2
concentrations in the ocean and atmosphere starts shifting. What is the pH of pure water?
Question 8 options:
13, basic
7, neutral
4, acidic
Answer:
13,basic would be your answer!
Explanation:
Write the parts of the ear in their correct order of transfer of vibrations. to the brain.
Answer:
The sound waves travel from the outer ear and in through the auditory canal, causing the eardrum, or tympanic membrane, to vibrate. This, in turn, causes the three small bones, known as the ossicles, or the hammer, the anvil and the stirrup, in the middle ear to move.
Sonni added 23.79 mL of KOH to 20.00 mL of 0.393 M HF until the equivalence point was reached. What is the concentration of conjugate base at the equivalence point after the initial neutralization?
Answer:
0.1795 M
Explanation:
From the given information:
The equation is:
[tex]\mathbf{HF_{(aq)}+ KOH_{(aq)} \to KF _{(aq)} + H_2O}[/tex]
From the above equation, the reaction will go to completion due to the strong base:
At the equivalence point, moles of acid (HF) will be equal to moles of base (KOH)
[tex]\text{Number of moles = Volume} \times Molarity[/tex]
Thus. since moles of HF = moles of KOH
Then; 0.020 × 0.393 M = 0.02379 × (x) M
(x) M = [tex]\dfrac{0.02 \times 0.393 \ M}{0.02379}[/tex]
(x) = 0.3304 M
Thus, the molarity of KOH = 0.3304 M
Using the balanced neutralization reaction;
moles of HF = moles of KOH = moles of conjugate base = 0.00786 mol
∴
Volume = 0.020 L + 0.02379 L
Volume = 0.04379 L
Volume of the solution = 0.04379 L
Therefore; Molarity = [tex]\dfrac{moles}{volume}[/tex]
Molarity = [tex]\dfrac{0.00786 \ mol}{0.04379 \ L}[/tex]
Molarity = 0.17949 mol/L
= 0.1795 M
After the initial neutralization, the molarity at the equivalence point will be:
"0.17949 mol/L"
Concentration of solutionAccording to the question,
→ HF (aq) + KOH (aq) [tex]\rightarrow[/tex] KF (aq) + H₂O
Since, moles of HF = moles of KOH
We know that,
Number of moles = Volume × Molarity
→ 0.020 × 0.393 = 0.02379 × M
By applying cross-multiplication,
The molarity of KOH be:
M = [tex]\frac{0.02\times 0.393}{0.02379}[/tex]
= [tex]\frac{0.00786}{0.02379}[/tex]
= 0.3304 M
By using balanced neutralization reaction,
Volume = 0.020 + 0.02379
= 0.04379 L
hence,
The molarity will be:
= [tex]\frac{Moles}{Volume}[/tex]
By substituting the values,
= [tex]\frac{0.00786}{0.04379}[/tex]
= 0.17949 mol/L
Thus the response above is correct.
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Do all materials respond to heat in the same way? Give an example to support your answer.
Answer:
yes.
Explanation:
Energy transfer will continue until the objects are at the same temperature. There are 3 ways in which thermal energy can be transferred from one object/substance to another, or from a system to its surroundings: Conduction. Convection.
All materials do not respond to heat in the same way because every material is made up of different arrangements of atoms and different substances, and different substances respond differently when reacting with heat.
What is heat?Heat is a form of energy that is produced by the burning of something. It is thermal energy that increases the warmth of a body or an atmosphere.
As long as the objects are not at the same temperature, energy transfer will continue. Three methods exist for transferring thermal energy from one thing or thing to another, or from a system to its surroundings: Conduction. Convection.
Thus, because each material is made up of a unique combination of atoms and substances, and because each substance reacts to heat in a unique way, no two materials react to heat in the same way.
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A compound accepts electrons from another substance to form a covalent bond. Which term best describes this
compound's behavior?
-Lewis acid
-Arrhenius base
-Bronsted-Lowry acid
-Bronsted-Lowry base
Answer:
A). Lewis Acid
Explanation:
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The term that best describes the compound that accepts electrons from another substance to form a covalent bond is Lewis acid.
What is Lewis acid?Lewis acid is a compound or ionic species which can accept an electron pair from a donor compound while a Lewis base is a compound such as the OH- ion, that can donate a pair of non-bonding electrons.
According to this question, a compound accepts electrons from another substance to form a covalent bond.
Therefore, the term that best describes the compound that accepts electrons from another substance to form a covalent bond is Lewis acid.
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Which if the following numbers in your personal life are exact numbers?
A. Your cell phone number
B. Your weight
C. Your IQ
D. Your driver's license number
E. The distance you walked yesterday
Answer:
I think D
Explanation:
Your cell phone number and your driver's license number are the numbers of your personal life that are exact.
In this context, an exact number refers to a number that if it undergoes any modification will not refer to the same thing that it referred to before that modification.
For example, my phone number is 12345. This number is exact because it cannot be changed because or else it would cease to be my phone number, that is, if someone wants to call me and writes the number 12346 it is no longer my number.
Addicionally, if my driver's license number is 112233 it is an exact number because if it is modified it would be the number of another driver.
According to the above, options B, C, and E are incorrect because they are inaccurate numbers because if they are modified they all refer to me and they would not change their meaning.
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Which of the following is NOT part of STP?
O O Fahrenheit
O 1 Atmosphere
O 273 Kelvin
O 101.3 kiloPascals
Answer:
Farenheit
Explanation:
STP is used to measure standard temperature and pressure -- it uses Kelvin for temperature, not Farenheit.
match the following
Answer:
Ai --> Bii
Aii --> Bi
Aiii --> Bv
Aiv --> Biii
Av --> Biv
Explanation:
For Ai, naphthalene sublimes directly from a solid to gas when heated at around 80 degree Celsius.
For Aii, Ozone has a molecular formula of O₃.
For Aiii, weeds are normally considered as "unwanted" plants. Many people may consider using herbicides to clear the weeds in their gardens.
For Aiv, filtration is a physical method for separating solid and liquid from a mixture. A filter paper is normally used, in which the complex structure of the paper only allows fluid to pass through it, but not the solid ones. The solid left behind on the filter paper is called "residue".
For Av, photosynthesis is a chemical reaction that occurs in the leaves of a plant, which produces food for plants to survive. Carbon dioxide, water and light are required for photosynthesis to take place.
In this field of sunflowers variation exists some flowers are tall others short
Answer:
Some flowers are tall, others short, and finally some plants are an intermediate height. The tallest plants shade the shorter; the taller plants are
Explanation:
solve the equation 2x-9=13
Answer:
x = 11
Explanation:
2x - 9 = 13
2x = 13 + 9
2x = 22
x = 11
Which Video game do you like the most?
Minecraft
Roblux because it won't allow me to say the actually game name
Fortnut same for this one
Call of duty
grand theft auto
Red redemption and
Geometry dash
minecraft or cod
Explanation:
well those are the only games I play but the one I enjoy the most is cod
GD
cnm nmvnvjngggguhygtcdffgvbhnmi
When we report the concentration of a solution we are using the moles of the entire compound.
a. True
b. False
Answer:
b. False
Explanation:
The formula to find the concentration of a solution is we simply divide the number of moles of the solute with total solution volume in liters. This gives the molar concentration of a solution. Clearly we do not use the number of moles of the entire compound but only that of solute.
Hence, we can conclude that the given statement is false.
Identify the type of reaction.
Al + MgSO4 = Al2(SO4)3 + Mg
Answer: its combustion
Explanation:
What is thePercent composition of dichlorine heptoxide?
Answer:
The percent composition of dichlorine heptoxide is 38.76% CI and 61.24% O
Answer:
38.76%cl and 61.24%o
Explanation:
the percent composition of dichlorine heptoxide is 38.76%Cl and 61.24%O
what is the difference between potential energy and kinetic energy?
A. potential energy is the energy of an object due to its position while kinetic energy is energy due to its motion
B. potential energy is the energy of an object due to its motion while kinetic energy is energy due to its position
C. potential energy is the energy of an object due to the applied Force while kinetic energy is energy stored after the applied force.
D. potential energy is the energy stored after an applied force while kinetic energy is the energy used from the applied force
Answer:
A
Explanation:
Potential energy is stored energy. Kinetic energy is energy of motion.
Calculate the mass of CO2 that can be produced if the reaction of 54.0 g of propane and sufficient oxygen has a 64.0% yield.
Answer:
103.9 g
Explanation:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂OFirst we convert 54.0 g of propane (C₃H₈) into moles, using its molar mass:
54.0 g ÷ 44 g/mol = 1.23 mol C₃H₈Then we convert 1.23 moles of C₃H₈ into moles of CO₂, using the stoichiometric coefficients:
1.23 mol C₃H₈ * [tex]\frac{3molCO_2}{1molC_3H_8}[/tex] = 3.69 mol CO₂We convert 3.69 moles of CO₂ into grams, using its molar mass:
3.69 mol CO₂ * 44 g/mol = 162.36 gAnd apply the given yield:
162.36 g * 64.0/100 = 103.9 gwhat career field/job would utilize ppm units
A environmental jobs
B Medical fields
C Jobs at the brewery
D Jobs in analytical chemistry
Question 8
What is the molar mass of a compound if there are 0.141 moles in a 7.14 gram sample.
3 significant figures including units
Predict the empirical formulas of the ionic compounds formed from the following pairs of element. Name each compoun.
A. Li and N.
B. GA and O.
C. Rb and Cl.
D. Ba and S.
Answer: A. [tex]LiN_3[/tex] : Lithium (I) nitride.
B. [tex]Ga_2O_3[/tex] : Galium (III) oxide.
C. [tex]RbCl[/tex]: Rubidium (I) chloride.
D. [tex]BaS[/tex] : Barium (II) sulphide.
Explanation:
Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.
A. Here metal Li is having an oxidation state of +1 called as [tex]Li^{+}[/tex] cation and [tex]N^{3-}[/tex] is an anion with oxidation state of -3. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]LiN_3[/tex]. The name of the compound is Lithium (I) nitride.
B. Here metal Ga is having an oxidation state of +3 called as [tex]Ga^{3+}[/tex] cation and [tex]O^{2-}[/tex] is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]Ga_2O_3[/tex]. The name of the compound is Galium (III) oxide.
C. Here metal Rb is having an oxidation state of +1 called as [tex]Rb^{+}[/tex] cation and [tex]Cl^{-}[/tex] is an anion with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]RbCl[/tex]. The name of the compound is Rubidium (I) chloride.
D. Here metal Ba is having an oxidation state of +2 called as [tex]Ba^{+}[/tex] cation and [tex]S^{2-}[/tex] is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]BaS[/tex]. The name of the compound is Barium (II) sulphide.
How Ever Gets This RITE IS REWARDED BRAINLIEST and 25 points get it rite
can you show the options? i'm pretty sure it's "before"
Answer:
the answer is According to fossil records scallops live before dinosaurs
Explanation:
before
Definition of Acid, base and
salt
Answer:
nenrhj4rhty4bdwkwwa
Explanation: