The concentration (molarity) of [H₃O⁺]=0.776 M
Further explanationWe balance the reaction first so that the number of atoms and the charge of the product and reactant are the same
Reaction(balanced) :
H₂S⇒2H⁺+S²⁻ (eq 1)
2H⁺+6H₂O⇒4H₃O⁺+2OH⁻ (eq 2)
mass of H₂S=0.33 g
mol H₂S (MW=34 g/mol) :
[tex]\tt mol=\dfrac{0.33}{34}=0.0097[/tex]
From equation 1, mol H⁺ = 2 x mol H₂S , so mol H⁺ =
[tex]\tt 2\times 0.0097=0.0194[/tex]
From equation 2, mol H₃O⁺ = 2 x mol H⁺(4 : 2) , so mol H₃O⁺ :
[tex]\tt 2\times 0.0194=0.0388[/tex]
Or simply mol H₃O⁺ = 4 x mol H₂S = 4 x 0.0097 = 0.0388
the molarity of [H₃O⁺] =
[tex]\tt M=\dfrac{n}{V}=\dfrac{0.0388}{0.05~L(50~ml)}=0.776[/tex]
Which phrase most accurately describes a chemical change?
Question 7 options:
A change in taste
A change on the molecular level
A change in form
A change in appearance
Answer:
C. it's change in form....
Hope this helps...... Stay safe and have a Merry Christmas!!!!! :D
In the reaction, 210 kJ of heat energy is used to form 3.0 moles of hydrogen.
Calculate how much heat energy is needed to make 1000 kg of hydrogen.
Heat energy needed : 3.5 x 10⁷ kJ
Further explanationHeat is a form of energy that can flow from high-temperature objects to low-temperature objects.
So heat moves when there is a difference in temperature and can increase or decrease the temperature. An object that receives a lot of heat will cause a large increase in temperature
The amount of heat is influenced by the mass of the object and the difference in temperature
Can be formulated
Q = m.c.Δt
Q: heat received or removed by an object (J)
m: object mass (kg)
c: heat type substance (J / kg⁰C)
ΔT: temperature change (⁰C)
210 kJ of heat energy is used to form 3.0 moles of Hydrogen, so heat energy for 1 mol Hydrogen :
[tex]\tt \dfrac{210}{3}=70~kJ/mol[/tex]
mol of 1000 kg of Hydrogen=10⁶ g(MW=2 g/mol)
[tex]\tt \dfrac{10^6~g}{2}=5.10^5[/tex]
The heat energy :
[tex]\tt 70~kJ/mol\times 5.10^5~mol=3.5\times 10^7~kJ[/tex]
1. Are ions involved in metallic bonding?
2. How are the atoms arranged in a metal? Why?
Answer:
1 ans =The atoms that the electrons leave behind become positive ions, and the interaction between such ions and valence electrons gives rise to the cohesive or binding force that holds the metallic crystal together.
what is the chemical name for carbon?
PLEASE HELP
Which of the following shows the kinetic form of mechanical energy?
A. Pedaling a bicycle
B. Holding a basketball
C. Lying on the ground
D. Watching television
Answer: A. Pedaling a bicycle
Explanation: i also have the same question too and im in 5th grade
1.Which Statement best describes the use of a catalyst in a fuel cell?
A.It reduces waste
B.It lowers energy requirements
C.It reduces toxic exhaust
D.It increases reaction rates
Answer: D. It Increases reaction rates.
Explanation:
Answer:
D. It Increases reaction rates.
Explanation:
Please help! This is 8th grade science btw
Answer:
hacfgdeibjExplanation:
Hope this Helps!
:D
Sodium Tetraborate, a naturally occurring mineral, is crushed into Borax. This is an example of a ________change. *
Chemical Change
Synthetic Change
Physical Change
Please Help I will mark brainllest for the first answer. If you dont know the answer do not answer please.
Answer:
Chemical Change
Explanation:
If all the gas in container A is transferred to a small container, B, with no change in temperature, the pressure in container B will ______.
A. increase
B. decrease
C. not change
D. become equal to the outside air pressure
Taking into account the Boyle's law, the correct answer is option A.) If all the gas in container A is transferred to a small container, B, with no change in temperature, the pressure in container B will increase.
The gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature, and moles.
As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them less times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls.
In this way pressure and volume are related, determining Boyle's law (on of the gas laws) which says:
"The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure"
That is, if the pressure increases, the volume decreases; whereas if the pressure decreases, the volume increases.
In summary, the correct answer is option A.) If all the gas in container A is transferred to a small container, B, with no change in temperature, the pressure in container B will increase.
Learn more:
https://brainly.com/question/4147359?referrer=searchResultsPlease help noowwwww... if you don’t know please don’t answer
Answer:
i honetly dont thing anyone knows that so look it up
Explanation:
What is the mass number of an atom containing 35 protons and 45 neutrons?
How many total electrons would that neutral atom contain
What is the element?
Will this element gain or lose electrons?
How many total electrons would an ion of that element have?
What is the charge on that ion (ex. +1,12 2. etc.)?
Is this ion an anion or cation?
What other element has the same number of electrons as the ion you have identified?
No
Answer:
Explanation:
1. Weight = 35 P and 45 N = 80
2. Atom: 35P = 35 electrons
3. Bromine
4. It's a non metal. It's in column 17. It will gain 1 electron (normally).
5. Ion: 35 protons, 36 electrons
6. Charge: - 1 usually, but there are exceptions
7. Anions go to the Anode. The anode attracts minus charged elements.
8. In an uncharged state, element 36 would be next. That would be Krypton which is always uncharged. It is a noble gas.
Plzzzz help I need help with this
Answer: c extracting oil
Explanation:
Saudi Arabia is known for there huge oil market
most matter does what when heated
Answer:
Expands
Explanation:
I don't know if that's an option but i hope it helps.
Explanation:
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.
When you have dominant allele T, recessive for t, T for tall and t for short, what will be phenotype for Tt?
PLEASE ANSWER QUICKLY I'LL GIVE 45 POINTS
Answer:
TT and Tt genotypes both expressed the tall phenotype because the T is dominant to t. Only the tt genotype expressed the short phenotype.
Explanation:
Hope this helped!
How many grams are in 39 moles of ammonium chloride? (Round to the nearest
whole number) Do NOT add units, enter numbers only!
Type your answer...
Answer:
468
Explanation:
How many moles of Helium would be equal to 55 liters of helium?
Answer:
Solution: 3.78 L He. 22.4 L. 1 mol. = 0.169 mol He.
Explanation:
Answer:
3.78 liters
Explanation:
If a balloon is filled with 3.78 L of He gas is at STP.
What principle is used in the above diagram to calculate the amount of carbon dioxide that s absorbed by laIId?
OA.
OB.
Oc.
OD.
the law of consevation of mass
the law of universal gravitation
cell theory
atomic theory
At which type of boundary do lithospheric plates collide?
Explain how thermal energy is transferred in convection.
Answer:
Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. ... As a result, the particles take up more volume.
The thermal energy is transferred in convection through the movements of fluids, such as air or water.
Thermal energy refers to the energy associated with the movement of particles in a system. As temperature increases, the particles in a substance gain kinetic energy and move faster, resulting in an increase in thermal energy.
When a fluid is heated, its molecules gain kinetic energy and begin to move faster, causing them to spread out and become less dense. This creates a region of warm, less dense fluid that rises upward due to buoyancy.
As the warm fluid rises, cooler, denser fluid moves in to take its place, creating a convection current. This process continues as long as there is a temperature difference between the warm and cool fluids. The movement of the fluids transfers thermal energy from the warmer areas to the cooler areas.
Therefore, In convection, thermal energy is transferred through the movement of fluids, such as air or water.
Learn more about Thermal energy here:
https://brainly.com/question/3022807
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Helppppppp. much needed help lol
Answer:
Isotope
Explanation:
Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number.
Look at periodic table. Which two elements share similar properties?
Answer: i think
lithium
potassium
Lipase is an enzyme that breaks down the fat in food molecules into smaller molecules. Which of the following best describes the function of lipase?
A certain metal alloy is composed of 10% tin, 16% antimony, and 74% lead. If you were to have 500 g of the alloy, how many grams of tin would be found in this sample?
The mass of Tin in alloy = 50 g
Further explanationGiven
10% tin, 16% antimony, and 74% lead.
mass of alloy = 500 g
Required
grams of tin
Solution
The mass percent of each component of the mixture shows the mass ratio of each component
%tin in alloy = 10%, so mass of tin :
[tex]\tt 10\%\times 500~g=50~g[/tex]
which of the following described the process of osmosis?
Answer:
a process which occurs when there is a difference in solute concentration between two solutions separated by a semipermeable membrane.
hope this helps
5. In which group of elements do most atoms have completely filled s and p velence sublevels? A) halogens B) noble gases C) alkali mctals D) alkaline earth metals
Answer:
It's noble gas & they have filled p sublevels
the answer above isn't complete
Explanation:
pictures below
what does this graph represent?
Answer:Potential and kinetic energy
Explanation:
PLS HELP
Which shows the correct path of how energy flows in a food chain?
A) producer, consumer, predator, decomposer
B) symbiosis, producer, prey, decomposer
С) consumer, predator, carnivore, herbivore
D) niche, consumer, decomposer, chlorophyll
The correct path of how energy flows in a food chain is option A. producer, consumer, predator, decomposer.
Path of energy flows in a food chain?Here the producer gets the energy from the sun and photosynthesis after that it should be eaten by the consumer that is preyed from the predators and after that the last one is a decomposer.
hence, we can conclude that The correct path of how energy flows in a food chain is option A. producer, consumer, predator, decomposer.
Learn more about an energy here: https://brainly.com/question/17989910
Guys please help me.
Explain how an Ion of oxygen is different from an atom of oxygen and how are they similar
Explanation:
An atom is the smallest indivisible particle of any substance that takes part in a chemical reaction.
All atoms are identified by the number of protons in them. Protons are the positively charged particles in an atom.
Ions are atoms that have either lost or gained electrons. Therefore, they become charged. Atoms are neutral particles where the number of protons and electrons are the same.Therefore, atoms and ions are similar because the atom and ion of an element have the same number of protons but differs in the number of electrons they carry.
Geologists obtain indirect evidence about Earth’s interior by
a.
measuring pressure differences at Earth’s surface.
b.
estimating temperature inside earth.
c.
directly looking under the many layers.
d.
recording and studying seismic waves.
Answer:
I'm sure it's D.
Explanation:
They obtain evidences by recording and studying seismic waves.
A sample of a compound contains 3.21 g of sulfur and 11.4 g of fluorine. What is the empirical formula of the compound?
Answer:
[tex] SF_{6}[/tex]
Explanation:
Let the compound be x.
Given the following data;
Sulfur, S = 3.21g
Fluorine, F = 11.4g
Atomic mass of sulfur = 32.07g
Atomic mass of fluorine = 19g
Amount of moles for sulfur;
3.21*(1/32.07) = 0.10mol
Amount of moles for fluorine;
11.4*(1/19) = 0.60mol
We then divide by the smallest to find the ratio;
(0.10/0.10) = 1 Mol of sulfur.
(0.60/0.10) = 6 Mol of fluorine.
Therefore, the ratio of sulfur to fluorine is 1:6.
Compound x = [tex] SF_{6}[/tex]
Hence, the empirical (simplest) formula of the compound is [tex] SF_{6}[/tex]
