Answer: its combustion
Explanation:
How much more acidic/more H+ concentration is a pH of 6 than pH of 8
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Answer: 1000x
Explanation:
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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
solve the equation 2x-9=13
Answer:
x = 11
Explanation:
2x - 9 = 13
2x = 13 + 9
2x = 22
x = 11
is oxygen a beginning substance or ending substance?
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
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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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.
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.
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 gIf only one sperm cell is needed to fertilize an egg, why are males capable of producing so many sperm cells?
Answer:
because of the testicles
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
explain fusion phenomenon
Answer:
is is the process of combination of two or more small nuclei to form large nucleus having large amount of energy
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.
5.07 x 10^24 atoms of antimony is how many moles?
8.98 mol
7.99 mol
4.82 mol
8.42 mol
Answer:
8.42 moles (3 sig. figs.)
Explanation:
Given 5.07 x 10²⁴ atoms of antimony (Sb) => ? moles Sb
1 mole of any substance contains 6.02 x 10²³ particles ( atoms or molecules)
∴ Think in terms of 'how many 6.02 x 10²³'s are in 5.07 x 10²⁴ atoms Sb?
That is => moles Sb = 5.07 x 10²⁴ atoms Sb / 6.02 x 10²³ atoms Sb/mole Sb
= 8.42192691 moles Sb (calculator answer) ≅ 8.42 moles (3 sig. figs.)
Which rank was NOT included in Linnaeus' taxonomy?
Kingdom
Family
Domain
Order
Answer:
Domain
Explanation:
This is because Linnaeus taxonomy is a system of classification which was invented by a swedish Botanist called Carl Linnaeus and it is refered to hierarchy of grouping organisms called taxa. It involve 7 system of classifications and they include Kingdom, Phylum, Class, Order, Family, Genus, and Species.
Male wood ducks mate only with female wood ducks. They produce male and female wood duck offspring that can mate only with other wood ducks. These facts
indicate that wood ducks:
Are inbred.
Do not mutate.
Are a species.
Lack variability
HELP
Answer:
Anyone got the answers
Explanation:
Answer: A
Explanation: just do as I say
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.
Convert 146 calories to kilojoules need to know ASAP
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 pressure of a mixture of oxygen, nitrogen and carbon dioxide gases if the pressures of these gases are as follows: PO2 = 254 mm Hg, PN2 = 0.351 atm, and
PCO2 = 43.9 kPa?
Answer:
his is an example of a first-year chemistry question where you must first convert two of the pressures to the units of the third and add them up, per Dalton’s law of additive pressures. There are three possible answers, one for each of the three pressure units.
1 atm = 760 torr …… torr and mm Hg are the same
1 atm = 101.3 kPa
Dalton’s law:
P(total) = P(O2) + P(N2) + P(CO2)
Explanation:
Gases will assume whatever pressure depending on the equation of state of the mixture (in this case) and the volume htey are contained in. That could be the ideal gas law and simple mixing law, If you are quoting the partial pressures which you call simply “the pressure” of each gas, and that these refer to their values in the present mixture, then yes, we would add them up. The pressures are low enough for the ideal gas law to apply provided the temperature is not extremely low as well .
Which compound is the conjugate base in the following reaction :H2SO4 + H2O —> HSO4 + H30+
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Answer: HSO4-
Explanation:
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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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How many moles of product are formed? Can someone help me ?
Answer:
It says right under here what to do
Explanation
Determine the moles of product produced by dividing the grams of product by the grams per mole of product. You now have calculated the number of moles of every compound used in this reaction. 41.304 g of NaCl ÷ 58.243 g/mol = 0.70917 moles of NaCl.
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.
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:
Plssss help ASAP I really need help with this y’all I’m bad at science
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
What is the other product for this reaction? Hbr + NaOH —> ( select 2)
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Answer: HBr + NaOH = nabr + h2o
Explanation:
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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.
Identify the most and the least acidic compound in each of the following sets. Leave the remaining answer in each set blank. a) oxalic acid: most acetic acid: _______ formic acid: least b) 2,4-dinitrobenzoic acid: most p-nitrobenzoic acid: _______ p-bromobenzoic acid: least c) cyclohexanol: _______ phenol: _______ benzoic acid: _______
Answer:
(a) The most acidic compound - oxalic acid
The least acidic compound - acetic acid
(b) The most acidic compound - 2,4-dinitrobenzoic acid
The least acidic compound - p-bromobenzoic acid
(c) The most acidic compound - benzoic acid
The least acidic compound - cyclohexanol
Explanation:
(a) Presence of electron donating group decreases the acidity of carboxylic acid. Therefore , acetic acid is least acidic due to methyl group on carbon of -COOH group.
Oxalic acid is the most acidic compound due to presence of 2 -COOH group.
(b) Presence of electron withdrawing group increases the acidity of benzoic acid. 2,4-dinitrobenzoic acid will be more acidic as it has two strong electronegative substituents ([tex]-NO_2[/tex] group).
p-bromobenzoic acid will be less acidic than p-nitrobenzoic acid beacuse Br is weaker electron withdrawing group than [tex]NO_2[/tex]
(c) pKa value of benzoic acid(4.45) is more than other compounds and cyclohexanol has least pKa value (16).(Since , higher the pKa value , least acidic the compound is )