Answers
Answer:
a. 3; b. 5; c. 10; d. 12
Explanation:
pH is defined as the negative log of the hydronium concentration:
pH = -log[H₃O⁺] (hydronium concentration)
For problems a. and b., HCl and HNO₃ are strong acids. This means that all of the HCl and HNO₃ would ionize, producing hydronium (H₃O⁺) and the conjugate bases Cl⁻ and NO₃⁻ respectively. Further, since all of the strong acid ionizes, 1 x 10⁻³ M H₃O⁺ would be produced for a., and 1.0 x 10⁻⁵ M H₃O⁺ for b. Plugging in your calculator -log[1 x 10⁻³] and -log[1.0 x 10⁻⁵] would equal 3 and 5, respectively.
For problems c. and d. we are given a strong base rather than acid. In this case, we can calculate the pOH:
pOH = -log[OH⁻] (hydroxide concentration)
Strong bases similarly ionize to completion, producing [OH⁻] in the process; 1 x 10⁻⁴ M OH⁻ will be produced for c., and 1.0 x 10⁻² M OH⁻ produced for d. Taking the negative log of the hydroxide concentrations would yield a pOH of 4 for c. and a pOH of 2 for d.
Finally, to find the pH of c. and d., we can take the pOH and subtract it from 14, giving us 10 for c. and 12 for d.
(Subtracting from 14 is assuming we are at 25°C; 14, the sum of pH and pOH, changes at different temperatures.)
Related Questions
What is the area of ∆XYZ?
Answers
Answer:
is there an attachment to this question? i can help if u insert one :)
Explanation:
(●'◡'●)
Science and there is a picture
Answers
Answer:
c solid metal
Explanation:
it's made of iron and nickel
Answer:
D) solid metal
Explanation:
Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel. The shorthand used for the core's iron-nickel alloys is simply the elements' chemical symbols—NiFe. Elements that dissolve in iron, called siderophiles, are also found in the core.
The inner core is solid because it is made of very dense, or heavy, materials - like iron and nickel. Even though it is very hot, these materials don't "melt" very easily, so they stay solid.
Based on the kinetic theory, which statement is true?
Matter is made up of only charged particles.
The particles of matter are stationary.
The particles of matter have zero kinetic energy.
Matter is composed of very small particles.
Answers
Answer:Matter is made up of only charged particles.
Explanation: Took the test
What pressure, in atm, would be exerted by 0.023 grams of oxygen (O2) if it occupies 31.6 mL at 91
°C?
Answers
Answer: A pressure of 0.681 atm would be exerted by 0.023 grams of oxygen [tex](O_2)[/tex] if it occupies 31.6 mL at [tex]91^{o}C[/tex].
Explanation:
Given : Mass of oxygen = 0.023 g
Volume = 31.6 mL
Convert mL into L as follows.
[tex]1 mL = 0.001 L\\31.6 mL = 31.6 mL \times \frac{0.001 L}{1 mL}\\= 0.0316 L[/tex]
Temperature = [tex]91^{o}C = (91 + 273) K = 364 K[/tex]
As molar mass of [tex]O_2[/tex] is 32 g/mol. Hence, the number of moles of [tex]O_2[/tex] are calculated as follows.
[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{0.023 g}{32 g/mol}\\= 0.00072 mol[/tex]
Using the ideal gas equation calculate the pressure exerted by given gas as follows.
PV = nRT
where,
P = pressure
V = volume
n = number of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the value into above formula as follows.
[tex]PV = nRT\\P \times 0.0316 L = 0.00072 mol \times 0.0821 L atm/mol K \times 364 K\\P = \frac{0.00072 mol \times 0.0821 L atm/mol K \times 364 K}{0.0316 L}\\= 0.681 atm[/tex]
Thus, we can conclude that a pressure of 0.681 atm would be exerted by 0.023 grams of oxygen [tex](O_2)[/tex] if it occupies 31.6 mL at [tex]91^{o}C[/tex].
A substance is tested and has a pH of 8.4. What would you classify it as?
A. A strong acid
B. A strong base
C. A weak acid
D. A weak base
Answers
Answer:
D
Explanation:
7 is neutral on a PH scale. Anything less is an acid and anything higher is a base. A Ph scale goes from 1-13. 8.4-7=1.4. This is a small change so it is considered a weak base. Can I get brainliest?
Answer:
D.A weak base
Explanation:
The pH of a weak base falls somewhere between 7 and 10. Like weak acids, weak bases do not undergo complete dissociation; instead, their ionization is a two-way reaction with a definite equilibrium point. While strong bases release hydroxide ions via dissociation, weak bases generate hydroxide ions by reacting with water. Ammonia (NH3) and methylamine (CH3NH2) are examples of weak bases.
_AgNo3(aq) + _Na2Co3(aq) =
1. Predict the products of the reaction including the states of matter for each product.
2. Balance the equation.
Please help me.
Answers
Answer:
2AgNO3 (aq) + Na2CO3 (aq) = Ag2•CO3 (s) + 2NaNO3 (aq)
Explanation:
1) The reaction given is a precipitation reaction between Silver nitrate and Sodium carbonate to give products as Ag_2_CO3 (s) and NaNO3 (aq)
Which are solid Silver carbonate and aqueous solution of Sodium nitrate.
2) The balanced equation is;
2AgNO3 (aq) + Na2CO3 (aq) = Ag2•CO3 (s) + 2NaNO3 (aq)
Multiple Choice
1. Think About the definition of remote sensing. Which of the following could be considered sensors?
2. When satellite images are analyzed a unit called the pixel is a key to calculating what?
3. One Pixel represents.
a temperature
a wind speed of 10 kilometers per hour
a land area of 30 by 30 meters
various colors depending on their size
Answers
Answer:
Remote sensing is the process of detecting and monitoring the physical characteristics of an area by measuring its reflected and emitted radiation at a distance (typically from satellite or aircraft). ... Cameras on satellites can be used to make images of temperature changes in the oceans.
2.The answer is Land Area. If you know the distance and scale at which the image was captured, than one pixel of the image is equal to an X amount of area. The land area is represented as one pixel in an image called Resolution.
3.A pixel is the smallest picture element addressable on a picture, it is a specific location, and at that location associated with that location, is color, intensity
a.mph (miles per hour), mph. knots, knots. m/s (meters per second), m/s. ft/s (feet per second), ft/s. km/h (kilometers per hour), km/h ...
Explanation:
7 kph 4.35 mph
8 kph 4.97 mph
9 kph 5.59 mph
10 kph
The apparatus or tools that could be considered as sensors are telecopes, probes and landsat satellites.
What is remote sensing?Remote sensing can be defined as a process that is used for the acquisition of information about a phenomenon or physical object on a planet without coming in close contact with it, especially through the use of a telecope, probe or landsat satellite.
When satellite images are analyzed by astronomers or scientists, a unit called the pixel is a key to calculating land area. Also, one pixel is a unit that represents a land area of 30 by 30 meters.
Read more on telescope here: https://brainly.com/question/18300677
name this compound
please helppp thank you!!!
Answers
Answer:
Sodium sulfide is the chemical compound with the formula Na 2 S, or more commonly its hydrate Na 2 S·9H 2 O. Both are colorless water-soluble salts that give strongly alkaline solutions. When exposed to moist air, Na 2 S and its hydrates emit hydrogen sulfide , which smells like rotten eggs.
I'm not sure if it's right but it's a guess because of the 2Na.
That is sodium carbonate, Na₂CO₃.
What color is phenolphthalein in a solution that has a pH of 10?
Answers
what happens during rusting
A. iron oxide decomposes to iron releasing oxygen
B. iron and oxygen react to form iron oxide
C. iron combusts in oxygen
D. water reacts with iron releasing oxygen
Answers
Answer: B
Explanation: I had an even lengthier explanation but Brainly is being a butthead. But I got it right on my test for those who want to know.
Rusting is the process of corroding metallic parts by the action of water and air. Iron forms iron oxide by reacting with water or air.
What is rusting ?Rusting is the process of corrosion of metallic parts by forming a red oxide film on the surface of the metals containing Fe. Metals on reacting with water or air destroys by the action of oxygen.
Mostly iron and copper undergo corrosion. Corrosion is an electrochemical process by which the metal part undergo reduction and deposits in cathode.
Iron easily undergo corrosion forming rust or the red colored iron oxide. Iron react with water through air or water and forms iron oxide on the metal surface which eventually cover the whole metal.
Find more on rusting:
https://brainly.com/question/18376414
#SPJ2
(1.7m - 2) + (2m – 4)
Answers
Answer: 3.7 m − 6
Explanation: Simplify the expression.
brainliest or a thank you pls :)) <3
Nuclear Equations HELP!!! 100PTS
Answers
Answer:
A balanced nuclear equation is one where the sum of the mass numbers (the top number in notation) and the sum of the atomic numbers balance on either side of an equation.
A nuclear equation is one, where the sum of the mass numbers and the sum of the atomic numbers balance on either side of an equation. Nuclear equation problems will often be given such that one particle is missing.
i did not mean to publish this ;-;
Answers
Answer:
dang
Explanation:
Answer:
hi I guess I got free point s
At 40 degrees Celsius , 100 grams of NaClO3 is added to 100 grams of water. The solution would be ..
a.) saturated
b.)unsaturated
c.) saturated with excess
d.) supersaturated.
Answers
what is a mole? not the animal definition lm.ao
Answers
Answer: Well, a mole is really the same thing. For a chemist, a mole conjures up the number 6.02 times 10 to the 23rd, not a fuzzy little animal. The only difference is that the other quantities are more familiar to us. Lol
Explanation:
Answer:
basically is a unit measurement for the amount of substance in the unit syystem, some examples are ions, atoms molecules, or electrons.
Explanation:
1.How many grams of zinc Zn and oxygen O2 will be needed to form 324 grams of ZnO after the reaction?
Answers
Answer: pretty sure its 0.214 moles * 40.3g/mole = 8.6g (2 sig figs) of MgO, and
0.035 moles * 40.3g/mole = 1.4g of MgO
Explanation:
- A closed container has a volume of 10 ml and a pressure inside of 20 P. If the
container is shrunk to 3 ml, what is the new pressure?
Answers
Answer: The new pressure is 66.66 mL.
Explanation:
Given : [tex]V_{1}[/tex] = 10 mL, [tex]V_{2}[/tex] = 3 mL
[tex]P_{1}[/tex] = 20 atm, [tex]P_{2} = ?[/tex]
Formula used to calculate the new pressure is as follows.
[tex]P_{1}V_{1} = P_{2}V_{2}[/tex]
Substitute the given values into above formula as follows.
[tex]P_{1}V_{1} = P_{2}V_{2}\\20 atm \times 10 mL = P_{2} \times 3 mL\\P_{2} = \frac{20 atm \times 10 mL}{3 mL}\\= 66.66 mL[/tex]
Thus, we can conclude that the new pressure is 66.66 mL.
A sample of nitrogen gas occupies 9.20 L at 21degrees and 0.999m the pressure is decreased to 0.802 am at constant temperature, what is the
newly occupied volume?
Answers
Answer: The newly occupied volume is 11.46 L
Explanation:
Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.
[tex]P\propto \frac{1}{V}[/tex] (At constant temperature and number of moles)
[tex]P_1V_1=P_2V_2[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 0.999 atm
[tex]P_2[/tex] = final pressure of gas = 0.802 atm
[tex]V_1[/tex] = initial volume of gas = [tex]9.20 L[/tex]
[tex]V_2[/tex] = final volume of gas = ?
[tex]0.999\times 9.20=0.802\times V_2[/tex]
[tex]V_2=11.46L[/tex]
Therefore, the newly occupied volume is 11.46 L
By what factor does the average kinetic energy of the molecules of gas in an aerosol container increase when the temperature is raised from 300 K to 900 Κ?
Answers
Answer:
The average kinetic energy is increased by a factor of 3.
Explanation:
The average kinetic energy is given by:
[tex] \overline{E} = \frac{3}{2}kT [/tex]
Where:
k: is the Boltzmann constant
T: is the temperature
When the temperature is 300 K we have:
[tex] \overline{E_{1}} = \frac{3}{2}300k [/tex]
Now, when the temperature is 900 K:
[tex] \overline{E_{2}} = \frac{3}{2}900k = 3(\frac{3}{2}300k) = 3\overline{E_{1}} [/tex]
Therefore, when the temperature is raised from 300 K to 900 Κ, the average kinetic energy is increased by a factor of 3.
I hope it helps you!
What is the difference between the coyotes and the gray squirrel population size in year 11?
Answers
Answer:
https://www.northallegheny.org/cms/lib/PA01001119/Centricity/Domain/1330/Concept8ecology.pdf is the cite that i got the answers for that form hop it helps
Explanation:
Answer:
As the squirrel population increases their resources become more scarce, putting a limit on population size
Explanation:
Bases and acids are _
A. Mixtures
B. Gases
C. opposites
D. The same
Answers
Answer:
opposite
Explanation:
mark me as a brainlist please
Which environment is BEST for an organism that sleeps during the day and digs holes in the ground for shelter?
A
Answers
brainliest and a free hug :)
The mass in a chemical reaction is found in
the energy produced by the reaction
the explosion produced by the chemical reaction
the atoms involved in the chemical reaction
the bonds involved in the chemical reaction
Answers
Answer:
C: The atoms involved in the chemical reaction
Explanation:
In a chemical reaction, when we balance it up, the number of moles or atoms on the left side must equal that on the right hand side. And thus, the mass is found in the atoms involved in such chemical reaction.
How many moles in 53.4 grams of CCl4.
Answers
Generic formular: Mole = mass/molar mass
molar mass of CCl4 = 153.811 g/mol
Mole of CCL4 = 53.4/153.811 = 0.347 mol
When a computer or end-user uses a made-up IP address as a source address is called?
Answers
Answer:
That would be a VPN.
Explanation:
Answer:
Would be a dependant, and the IP address is the host address
how many neurons are in lithium
Answers
How many grams of H2O is created from 60 grams of O2?
[2 H2 + O2 —> 2 H2O]
Answers
Answer:
67.5 gm H2O
Explanation:
2 H2 = 4 gm
O2 = 32 gm
2 H20 = 36 gm
so 32 gm O2 results in 36 gm H20
32/36 = 60/x x = 67.5 gm
Lysol Power Toilet Bowl Cleaner contains 9.5% hydrochloric acid. Explain why this would be necessary to clean toilet bowls that have white or rust-coloured deposits
Answers
Answer:
The acid will absolutely remove the hard water deposits that are trapping the stains. The longer it soaks, the less you have to scrub. It works for hard water stains, limescale, and rust!
Explanation:
hope this helped you out.
What is the molecular geometry of a molecule with 4 outer atoms and 1 lone pair on the central atom?
Answers
Answer:
See explanation
Explanation:
The valence shell electron pair repulsion theory states that; the number of electron pairs present on the valence shell of the central atom in a molecule is the final determinant of shape of the molecule.
Based on this theory, the electron domain geometry of a molecule having 4 outer atoms and 1 lone pairs on the central atom should be based on a trigonal bipyramid. The molecular geometry of this molecule is see saw with a bond angle of <90 degrees(axial) and <120 degrees(equatorial).
You’re going on a plane from Alaska to Florida and you’re taking your bike. It’s the middle of the winter. You fill up your tires before you leave to a pressure of 4.72 atm on a day that is -3.50°C. When you arrive in FL at 42°C, you check the pressure in your tires before you ride and find the pressure to be:
Answers
Answer:
5.52atm
Explanation:
Using the pressure law formula:
P1/T1 = P2/T2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the question, the following information were provided;
P1 = 4.72 atm
P2 = ?
T1 = -3.50°C = -3.50 + 273 = 269.5K
T2 = 42°C = 42 + 273 = 315K
Using P1/T1 = P2/T2
4.72/269.5 = P2/315
CROSS MULTIPLY
4.72 × 315 = 269.5 × P2
1,486.8 = 269.5P2
P2 = 1,486.8 ÷ 269.5
P2 = 5.52atm
