TLDR: A.
Understanding the idea of chemical equations is sometimes a hard concept to grasp in general chemistry because it’s typically not explained well. What a chemical equation represents is what literally happens on the subatomic level. The coefficients in front of the reactants and products mean, number for number, what you would get if you performed the reaction. It’s like an atomic recipe - you can only “make” things when you have enough ingredients. When an ingredient runs out, you can’t produce any products anymore. The ingredient that runs out the quickest is known as the “limiting reagent”, as it literally limits what you can produce.
In the equation above, 2 equivalents of “a” and 3 equivalents of “b” are consumed to produce the products. This means that “b” gets consumed faster than “a”. To make one sample of products, you need two molecules of “a” and three molecules of “b”. If you start out with four moles of each reactant (the same number of atoms), you’ll run out of “b” before “a” because the reaction consumes more molecules of “b” than molecules of “a”. Therefore, the answer would be A. You would need 6 moles of “b” to finish the reaction and use up the remaining “a” (a 2:3 ratio, just like in the balanced equation).
Hope this helps!
Final answer:
The limiting reactant is determined by dividing the moles of each reactant by its stoichiometric coefficient. Reactant 'B' is limiting because it gives a smaller ratio compared to 'A' after the division, indicating that it will be consumed first.
Explanation:
Identifying the Limiting Reactant
To determine the limiting reactant, you must first understand the stoichiometric relationship between reactants in a balanced chemical equation. In the given equation 2a+3b → c, the stoichiometry indicates that 2 moles of a react with 3 moles of b to produce c. We have 4.0 moles of both a and b. To find the limiting reactant, divide the number of moles of each reactant by its respective coefficient:
For a: 4.0 moles ÷ 2 = 2
For b: 4.0 moles ÷ 3 = 1.33
Reactant b will run out first because it produces a smaller ratio (1.33) compared to reactant a (2) when divided by their coefficients. Therefore, b is the limiting reactant, and the correct answer is 'A) B is limiting because 4.0 mol and 6.0 mol are needed'.
which are examples of dynamic equilibrium
Answer:Dynamic Equilibrium Examples. Any reaction will be in dynamic equilibrium if it's reversible and the rates of the forward and reverse reactions are equal. For example, say that you prepare a solution that is saturated with an aqueous solution of NaCl.
Explanation:
Answer:
2,4,5
Explanation:
on edg
The pressure exerted on a sample of gas is 735 mm Hg with a volume of 375 mL and a temperature of 25 degrees Celsius. What would the pressure of the gas be if the temperature was reduced to standard temperature and the volume was expanded to 500.0 mL?
Answer:
= 498.13 mmHg
Explanation:
Using the combined gas law;
P1V1/T1 =P2V2/T2
in this case; P1 = 725 mmHg, V1 = 375 mL and T1 = 25°C + 273 = 298 K
P2 = ? V2 = 500 mL and T2 (standard temperature) = 0°C + 273 = 273 K
P2 = P1V1T2/T1V2
= (725 × 375 × 273)/(298 × 500)
= 498.13 mmHg
which technique often results in the greatest habitat loss
a. silverculture
b. clear- cutting
c. thinning
d. shelterwood harvests
Answer: b. Clear cutting
Explanation:
Clear cutting is the correct option. Clear cutting involves the clearing up of entire vegetation cover of the region or cutting up of trees. This will lead to loss of canopy cover from a region. This will cause loss of biodiversity of a region as the animals, birds and insects will loose their habitat. Such faunal species may translocate to new region, decrease in number or may extinct.
Answer:
It is clear cutting
Explanation:
Clearcutting, clearfelling or clearcut logging is a forestry/logging practice in which most or all trees in an area are uniformly cut down.Clearcutting has been a controversial subject because of its environmental impact. While those who favour this method argue that it allows regenerating trees to have more access to sunlight while it reduces the risk of forest fires in some high-risk areas, opponents point out that in many cases, mass tree removal has caused soil erosion and the destruction of natural habitats for some animals.
How many particles are in a mole? 6.02 × 1023 23 × 106 602 billion 6.02 × 2310
Answer:
[tex]1mole=6.02x10^{23} unit[/tex] (Avogadro constant)
Explanation:
It is known by the name of mole (mol) to one of the fundamental physical magnitudes that contemplate the International System of Units. This unit is used to measure the quantity of all kinds of substances present in a given system.
The mole, experts say, reflects the amount of substance that has a specific number of entities of elementary character as atoms can be found in twelve grams of carbon-12. This means that the number of elementary units (as in the case of atoms, molecules or ions, for example) that are reflected in a mole of substance is a constant that has no direct relationship with the type of particle or material in question. This amount is known as Avogadro's number.
This constant, baptized in homage to the scientist of Italian origin Amedeo Avogadro (1776-1856), allows to count microscopic particles from macroscopic measurements (as it is the case of the mass).
In chemistry, a mole consists of exactly 6.022 × 10²³ particles, which can be atoms, molecules, ions, or electrons. This quantity is known as Avogadro's number. Option A is correct.
The number of particles in a mole is a fundamental concept in chemistry, directly associated with the Avogadro's number. One mole of any substance, be it atoms, molecules, ions, or electrons, contains exactly 6.022 × 10²³ of those particles.
This specific value is selected for its utility in linking the macroscopic measurements that scientists can easily work with, to the microscopic scale of atoms and molecules which are too small to interact with directly.
This value (6.022 × 10²³) also represents the bridge between the molecular scale and the scale of chemical reactions observable and measurable in the laboratory. It's because every mole of substance, due to this number, will have a mass in grams equal to its molecular (or atomic) mass which is a direct translation of microscopic properties to macroscopic quantities that can be measured.
Hence, A. is the correct option.
The complete question is:
How many particles are in a mole?
A. 6.02 × 10²³
B. 23 × 10⁶
C. 6.02 × 23¹⁰
HELP ME WITH THIS 60 POINTS,5-STAR RATING, AN THANKS AND MARKED AS BRANLIEST.
Susan Wondered why she heard less crickets in the fall than during the summer.She decided to investigate how temperature affects the chirping of crickets.Susan hypothesized that if the temperature is decreased, then the number of chirps would decrease, then the number of chirps would decrease.She took 10 crickets and 10 containers and place a cricket in each one.She recorded the number of chirps each cricket made in one minute at a room temperature.Susan gave all the crickets the same amount of food, water,and same type of container.
Independed Variable:
dependent variable:
Hypothesis:
constants:
repeated trails:
control:
Answer:
Independed Variable:
food, water, container
dependent variable:
temperature
Hypothesis:
That there are less chirps if temperature is lower
constants:
food, water, container
repeated trials:
10 crickets and 10 containers, 10x accurate than using 1 and 1
control:
Crickets and containers
A hydrocarbon with this formula C10H22:
is unstable
is unsaturated
is relatively unreactive except for combustion
shares 3 pairs of electrons in the C-C bond
Answer:
is relatively unreactive except for combustion
Explanation:
Answer:
Option 3
Explanation:
Did the odyssey and it's the right answer
How many milliliter of 2m NACL solution are required to make 1 liter of 0.4 M NACL solution
The volume (in mL) required to make 1 L of the solution is 200 mL
Data obtained from the questionMolarity of stock solution (M₁) = 2 MVolume of diluted solution (V₂) = 1 L = 1000 mL Molarity of diluted solution (M₂) = 0.4Volume of stock solution (V₁) = ?How to determine the volume of the stock solutionM₁V₁ = M₂V₂
2 × V₁ = 0.4 × 1000
2 × V₁ = 400
Divide both side by 2
V₁ = 400 / 2
V₁ = 200 mL
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Final answer:
To prepare 1 liter of a 0.400 M NaCl solution from a 2.00 M NaCl solution, you need 200 milliliters of the 2.00 M solution, calculated using the dilution formula M1V1 = M2V2.
Explanation:
To determine how many milliliters of a 2.00 M NaCl solution are required to make 1 liter of a 0.400 M NaCl solution, we can use the dilution formula M1V1 = M2V2, where M1 is the molarity of the initial solution, V1 is the volume of the initial solution, M2 is the molarity of the final solution, and V2 is the volume of the final solution
In this case, we have:
M1 = 2.00 M (initial molarity of NaCl)
M2 = 0.400 M (desired molarity of NaCl)
V2 = 1 liter = 1000 mL (desired volume of final solution)
To find V1, we rearrange the equation: V1 = (M2 × V2) / M1.
Substituting in the known values, we get: V1 = (0.400 M × 1000 mL) / 2.00 M = 200 mL.
So, you would need 200 milliliters of the 2.00 M NaCl solution to prepare 1 liter of a 0.400 M NaCl solution.
A gas occupies 65 mL at a temperature of 92.4 °C. What is the volume at 87.6 °C?
Answer:
64.15 mL.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and P are constant, and have two different values of V and T:V₁T₂ = V₂T₁
V₁ = 65.0 mL, T₁ = 92.4°C + 273 = 365.4 K.
V₂ = ??? mL, T₂ = 87.6°C + 273 = 360.6 K.
∴ V₂ = V₁T₂/T₁ = (65.0 mL)(360.6 K)/(365.4 K) = 64.15 mL.
1. In a compound, which type of bond is the sharing of electrons between adjacent atoms?
A. Nuclear bond
B. Electric bond
C. Chemical bond
D. Hydrogen bond
2. Two compounds are mixed and light is emitted, the color changes, and heat is liberated.
Which activity has occurred?
A. Chemical reaction
B. Chemical mixture
C. Chemical nucleus exchange
D. Chemical compromise
3. Which sodium reacts with chlorine to make sodium chloride (table salt), which term applies to sodium chloride?
A. Reactant
B. Mixture
C. Evaporate
D. Product
4. Which name is given to a reaction in which the number of each atom on one side of the equation is equal to the number of the same kind of atoms on the other side of the equation?
A. Complete
B. Atomic
C. Balanced
D. Electrical
5. In the reaction NA + CI - - - > NaCI, which statement indicates whether the equation is balanced?
A. Visual evidence is necessary to determine the balance of the reaction
B. Atoms of the same kind are of equal number on either side of the arrow
C. Atoms of the same kind are not of equal number on either side of the arrow
D. Evidence of the heat reaction is necessary to tell whether the equation is balanced.
Answer:
1. C. Chemical bond
2. A. Chemical reaction
3. Product
4. C. Balanced
5. B. Atoms of the same kind are of equal number on either side of the arrow
Explanation:
A chemical bond is a bond between two or more atoms. There are different types of chemical bonds, but the one that the question is pertaining to is called a covalen bond. A covalent bond occurs when the atoms are sharing electrons.
2. A chemical reaction is characterized by the production of light and/or heat, and a change in color in the product. By definition, it is the process where one or more substances react to produce one or more products.
3. When one or more reactants react with each other, it creates another substance or substances called products. In the case of your question, sodium reacts with chlorine (these are your reactants), which produces the product sodium chloride, which is a compound.
4. By definition, a balanced equation is an equation where the number of atoms of each element in the reactants are equal to the number of atoms of each element in the product.
ex.
Reactants Product
Na + Cl → NaCl
Na = 1 Na = 1
Cl = 1 Cl = 1
5. As explained above and shown, you can see that the number of atoms of each element in the reactants is equal to the number of each element in the product. So this means that the equation is balanced.
Answer:
1chemical bond 2chemical reaction 3 reaction 4 atomic 5atoms of the same kind ate not of equal number on either side of the arrow
Match the following.
1. to bend
-
opaque
-
2. not allowing light to pass through
-
refract
-
3. only partially clear
-
translucent
4. clear
transparent
Answer:
1. to bend ==> refract
2. not allowing light to pass through ==> opaque
3. only partially clear ==> translucent
4. clear ==> transparent
Explanation:
1. to bend ==> refract
When a substance (like water) or a surface (like a mirror) changes the direction of the light, it refracts it.
2. not allowing light to pass through ==> opaque
Usually a solid but also a thick/dark liquid can be an opaque barrier preventing the passage of light.
3. only partially clear ==> translucent
Think about a white plastic or a film-coated glass pane, they will let you see there's light on the other side, but not letting it pass through completely.
4. clear ==> transparent
Think like a window or a anything similar that allows the light to pass through without any significant obstruction.
Answer:
1. to bend ==> refract
2. not allowing light to pass through ==> opaque
3. only partially clear ==> translucent
4. clear ==> transparent
Explanation:
How much energy is released when 0.40 mol C6H6(g) completely reacts with oxygen? 2C6H6(g) + 15O2(g) 12CO2(g) + 6H2O(g) kJ
Answer:
-1268 kJ
Explanation:
The molar enthalpy of combustion of C6H6 is -3170 kJ/mol
2C6H6(g) + 15O2(g) → 12CO2(g) + 6H2O(g)
Therefore;
when 1 mole of C6H6 undergoes combustion, an energy of -3170 kJ/mol is released.
Therefore; for 0.40 mole
= 0.4 × -3170 kJ
= -1268 kJ
Answer:
The guy above me is correct, but the next answers are -67.68 and exothermic
Explanation: edge
When you compare the DNA of two closely related organisms, would you expect their DNA to be more
similar or less similar than the DNA of two distantly related organisms?
Answer:
You would expect their DNA to be more similar.
Explanation:
You would expect this because they're more closely related and have had fewer time for mutations to occur.
DNA of two closely related organisms would be more similar, while DNA of two distantly related organisms would be less similar.
Explanation:When you compare the DNA of two closely related organisms, you would expect their DNA to be more similar. Closely related organisms share a recent common ancestor, which means they have had less time for genetic differences to accumulate. As a result, their DNA sequences are more likely to be similar. On the other hand, when you compare the DNA of two distantly related organisms, you would expect their DNA to be less similar. Distantly related organisms have had more time for genetic differences to accumulate, resulting in more differences in their DNA sequences.
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which of the following is an acid-base neutralization reaction
Sn+2HF->SnF2+H2
C2H4+3O2->2CO2+H2O
MgCl2+Ca(OH)2->Mg(OH)2+CaCl2
HNO3+KOH->KNO3+H2O
Answer:
The right choice is "HNO₃ + KOH → KNO₃ + H₂O"
Explanation:
acid-base neutralization reaction is a reaction in which acid react with base to form salt and water.
Sn + 2HF → SnF₂ + H₂This is a reaction between metal (Sn) and acid (HF)
2. C₂H₄ + 3 O₂ → 2 CO₂ + H₂O
This is a combustion reaction
3. MgCl₂ + Ca(OH)₂ → Mg(OH)₂ + CaCl₂
This is a simple displacement reaction between salt (MgCl₂) and base (Ca(OH)₂).
3. HNO₃ + KOH → KNO₃ + H₂O
This is a acid-base neutralization reaction in which acid (HNO₃) react with base (KOH) to form salt (KNO₃) and water (H₂O).
So, the right choice is "HNO₃ + KOH → KNO₃ + H₂O"
According to most scientists, cold fusion
will not be a practical source of energy on Earth
According to most scientists, cold fusion will not be a practical source of energy on Earth. Option 1 is correct.
Cold fusion is a hypothetical type of nuclear fusion that would occur at or near room temperature. If it were possible to achieve cold fusion, it would be a virtually unlimited source of energy. However, there is no scientific consensus that cold fusion is actually possible, and there have been many failed attempts to reproduce the results of early experiments.
Most scientists believe that cold fusion will not be a practical source of energy is that it would require very high pressures and temperatures to initiate the fusion reaction. These conditions are difficult to achieve and maintain in a laboratory setting, and it is not clear how they could be scaled up to a commercial level.
Another problem with cold fusion is that it would likely be very expensive to produce. The materials and equipment needed to create the high pressures and temperatures would be very costly, and the energy output would probably be relatively low. Option 1 is correct.
The complete question is
According to most scientists, cold fusion
1. Will not be a practical source of energy on Earth
2. Would be a practical source of energy on Earth if it were less expensive
3. Will be a practical source of energy on Earth within the next few decades
4. Will always continue to be a practical source of energy on Earth
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Drag each tile to the correct location on the image.
Place each noble gas symbol in front of the appropriate partial electron configuration to create an accurate electron configuration.
Answer:
[He]: 2s² 2p⁵.
[Ne]: 3s².
[Ar]: 4s² 3d¹⁰ 4p².
[Kr]: 5s² 4d¹⁰ 5p⁵.
[Xe]: 6s² 4f¹⁴ 5d¹⁰ 6p².
Explanation:
Noble elements are used as blocks in writing the electronic configuration of other elements as they are stable elements.[He]:
He contains 2 electrons fill 1s (1s²).
So, [He] can be written before the electronic configuration of 2s² 2p⁵.
[Ne]:Ne contains 10 electrons fill (1s² 2s² 2p⁶).
So, [Ne] can be written before the electronic configuration of 3s².
[Ar]:Ar contains 18 electrons is configured as ([Ne] 3s² 3p⁶).
So, [Ar] can be written before the electronic configuration of 4s² 3d¹⁰ 4p².
[Kr]:Kr contains 36 electrons is configured as ([Ar] 4s² 3d¹⁰ 4p⁶).
So, [Kr] can be written before the electronic configuration of 5s² 4d¹⁰ 5p⁵.
[Xe]:Xe contains 54 electrons is configured as ([Kr] 5s² 4d¹⁰ 5p⁶).
So, [Xe] can be written before the electronic configuration of 6s² 4f¹⁴ 5d¹⁰ 6p².
Answer:
This is the Order :)
For Plato
under what conditions might too much copper go into solution?
An excess of copper may dissolve in a solution during a redox reaction with, for example, a silver nitrate solution where copper wire oxidizes to form copper(II) ions, imbuing the solution with a blue color. Similar conditions can occur in the decomposition of copper from copper ore, chalcocite.
Explanation:Too much copper might go into solution under certain conditions, most commonly in the presence of a chemical reaction where copper is oxidized. For example, when copper wire is placed in a solution containing dissolved silver salt, it undergoes a redox reaction. During this reaction, copper oxidizes to form copper(II) ions, Cu²+ (aq), resulting in a characteristic blue color in the solution due to the dissolved copper ions.
This is the case when the silver nitrate solution reacts with the copper wire. The silver ions are reduced to elemental silver which deposits on the copper wire while copper ions dissolve in the solution. This process spontaneously occurs making the solution more and more blue in color.
An important source of copper is from copper ore, chalcocite, which upon heating decomposes to form copper and sulfur. This is another scenario when copper might dissolve in a solution if the surrounding conditions favor this particular reaction.
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Which of the following are not single-displacement reactions?
O A. Fe (s) + 2HCl (aq) → FeCl2(aq) + H2 (9)
B. KOH (aq) + HNO3 (aq) – H20 () + KNO3 (aq)
O C. Na2S (aq) + 2HCl (aq) + 2NaCl (aq) + H2S (g)
O D. Ca (s) + 2H20 (1) ► Ca(OH)2 (aq) + H2 (9)
.
SUBMIT
Answer:
[tex]\boxed{\text{B and C }}[/tex]
Explanation:
In a single-displacement reaction, one element exchanges partners with another element in a compound.
[tex]\textbf{A. } \rm Fe + 2HCl \longrightarrow FeCl_2 + H_2[/tex]
This is a single-displacement reaction, because the element Fe exchanges partners with H in HCl.
[tex]\textbf{B. } \rm KOH + HNO_3 \longrightarrow H_2O + KNO_3[/tex]
This is not a single-displacement reaction, because it is a reaction between two compounds.
This is a double displacement reaction in which the K⁺ and H⁺ cations change partners with the anions.
[tex]\textbf{C. } \rm Na_2S + 2HCl \longrightarrow 2NaCl + H_2S[/tex]
This is not a single-displacement reaction. It is another double displacement reaction, in which the Na⁺ and H⁺ cations change partners with the anions.
[tex]\textbf{D. } \rm Ca + 2HOH \longrightarrow Ca(OH)_2 + H_2[/tex]
This is a single-displacement reaction, because the element Ca exchanges partners with H in H₂O.
[tex]\boxed{\textbf{B and C }}[/tex] are not single-displacement reactions.
Which reaction is an example of an endothermic reaction?
Answer:
These examples could be written as chemical reactions, but are more generally considered to be endothermic or heat-absorbing processes: Melting ice cubes. Melting solid salts. ... Converting frost to water vapor (melting, boiling, and evaporation, in general, are endothermic processes.
Explanation:
We have that an example of an endothermic reaction is given as
EvaporationThe Formation of Nitric Acid
From the question we are told
Which reaction is an example of an endothermic reaction?
Generally an endothermic reaction is a reaction where heat energy is absorb from the air in to a system.
Generally it cause a reduction in the temperature of a system and can be found in processes like
EvaporationThe Formation of Nitric AcidTherefore
An example of an endothermic reaction is given as
EvaporationThe Formation of Nitric Acid
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Which gas below has the largest number of moles at STP?
a.) 22.4L Ne
b.) 20L Ar
c.) 2.24L Xe
d.) They all have the same number of moles.
Answer:
a.) 22.4 L Ne.
Explanation:
It is known that every 1.0 mol of any gas occupies 22.4 L.
For the options:
22.4 L Ne:It represents 1.0 mol of Ne.
20 L Ar:
using cross multiplication:
1.0 mol occupies → 22.4 L.
??? mol occupies → 20 L.
The no. of moles of (20 L) Ar = (1.0 mol)(20 L)/(22.4 L) = 0.8929 mol.
2.24 L Xe:using cross multiplication:
1.0 mol occupies → 22.4 L.
??? mol occupies → 2.24 L.
The no. of moles of (2.24 L) Xe = (1.0 mol)(2.24 L)/(22.4 L) = 0.1 mol.
So, the gas that has the largest number of moles at STP is: a.) 22.4 L Ne.what is the pressure of 0.33 moles of nitrogen gas, if it's volume is 15.0L at -25.0°C
Answer:
0.448 atm
Explanation:
we can use the ideal gas law equation to find the pressure of nitrogen gas
PV = nRT
where
P - pressure
V - volume
n - number of moles of gas
R - universal gas constant - 0.08206 L.atm/mol.K
T- temperature in kelvin - -25.0 °C + 273 = 248 K
substituting the values in the equation
P x 15.0 L = 0.33 mol x 0.08206 L.atm/mol.K x 248 K
P = 0.448 atm
the pressure of gas is 0.448 atm
The study of chemicals and bonds is called chemistry. According to the law of thermodynamics, the temperature is the move from the high system to the low system.
The correct answer is 0.448 atm.
What is ideal gas law?The ideal gas law, also called the general gas equation, is the equation of the state of a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions, although it has several limitations.The formula used to solve the question is as follows:-
[tex]PV = nRT[/tex]where,
P - pressureV - volumen - number of moles of gasR - universal gas constant - 0.08206 L.atm/mol.KT- temperature in kelvin - -25.0 °C + 273 = 248 KPlacing all the values in the equation.
[tex]P * 15.0 L = 0.33 mol * 0.08206 * 248 K P = 0.448 atm [/tex]
Hence, the pressure of a gas is 0.448 atm
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The directness of the sunlight at a specific latitude will determine the amount of solar energy that latitude receives. Please select the best answer from the choices provided T F
Answer:
True
Explanation:
The amount of solar energy a particular place receives is directly dependent on the directness of the sunlight. This is like this because the more direct the sunlight is , the more concentrated at smaller area it is, thus warming the area more, and the less direct the sunlight is, the more dispersed the sunlight is, and the area is heated much less. The directness of the sunlight depends on the inclination of the Earth, as well as the shape of the Earth. The inclination makes certain areas be more exposed to the sunlight in part of the year, and than be less exposed in the other part of the year. The shape of the Earth is directly influencing the angle by which the sunlight falls, the lower the latitude, the more direct the sunlight, the higher the latitude, the less direct the sunlight.
Answer:
T
Explanation:
what is the oxidation half-reaction for 2Mg+O2
Answer:
Mg --> Mg²⁺ + 2e
Explanation:
Redox reactions consists of both reduction and oxidation reactions.
one species gets oxidised and other species gets reduced, both reactions happen simultaneously giving rise to a redox reaction.
Oxidation reactions could be either loss of electrons or gain of oxygen.
in oxidation the oxidation number of the species will increase
reduction on the other hand is either gain of electrons or gain of hydrogen.
in reduction the oxidation number of the species will reduce
in this reaction the oxidation half reaction is
Mg --> Mg²⁺ + 2e
Mg is losing electrons therefore its being oxidised
how many oxygen molecules are present in 340gm of hydrogen peroxide
Answer:
there are 9.9957 mol O2 in 340 g H2O2
Explanation:
Mw H2O2 = 34.0147 g/molreaction:
H2 + O2 ↔ H2O2⇒ mol H2O2 = 340 g H2O2 * ( mol H2O2 / 34.0147 g H2O2 ) = 9.9957 mol
⇒ mol O2 = 9.9957 mol H2O2 * ( mol O2 / mol H2O2 ) = 9.9957 mol
What type of equation is HgO=Hg+o2
Answer:
Thermal decomposition reaction.
Explanation:
Solid mercury(II) oxide is decomposed with heating into liquid mercury and oxygen gas. This reaction takes place at a 600-700°C.
The balanced chemical reaction is:
2HgO → 2Hg + O₂.
Considering the definition of decomposition reaction, the reaction HgO → Hg + O₂ is a thermal decomposition reaction.
Definition of decomposition reactionA single substance decomposes through a reaction called decomposition, producing two or more diferent compounds. That is, in this type of reaction two or more compounds are formed from a compound.
The atoms that make up a compound are separated to give the products according to the formula:
AB → A + B
This type of reaction can occur spontaneously or caused by certain external factors, such as heat. So, there are 3 types of decomposition reactions:
Catalysis is the term used when the decomposition results from the action of a catalyst.Thermal decomposition is the term used when decomposition is caused by the application of heat.Electrolytic decomposition or electrolysis is the term used to describe decomposition that is caused by the introduction of electric current.Type of reaction in this caseThe reaction HgO → Hg + O₂ is a thermal decomposition reaction where mercuric oxide (HgO) decomposes on heating to give mercury (Hg) and oxygen (O₂).
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How many atoms are in 8.1 moles of oxygen? And how do you know?
Answer:
4.88 x 10²⁴atoms
Explanation:
Given parameters:
Number of moles of oxygen = 8.1moles
Problem:
To find the number of atoms in 8.1moles of oxygen.
Method in solving the problem:
We know that a mole of a substance contains Avogadro’s number of particles which is 6.02 x 10²³
The particles can be molecules, atoms, etc.
Solution:
From the concept of mole,
Number of atoms =
number of moles x 6.02 x 10²³
Number of atoms = 8.1 x 6.02 x 10²³
Number of
atoms of oxygen = 48.8 x 10²³ atoms
= 4.88 x 10²⁴atoms
Nuclear decay is more likely to occur when?
Answer:
Radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold the nucleus together due to an excess of either protons or neutrons.
Hope this helps!
Answer:
It happens when a heavy nucleus is bombarded with neutrons, so it becomes unstable and decomposes into two nuclei.
Explanation:
This is known by the term nuclear fission, which is a reaction by which a heavy nucleus, when bombarded with neutrons, becomes unstable and divides into two nuclei, of sizes of the same order of magnitude, there is a high release of energy and emits two or three neutrons. These neutrons can lead to more fissions by interacting with other fissile nuclei.
Which subatomic particles are primarily responsible for giving an atom its mass?
Answer:
protons and neutrons
Explanation:
its on the assighnment
Protons and neutrons subatomic particles are primarily responsible for giving an atom its mass .
What do you mean by protons and neutrons ?A proton is a positively charged particle that lies in the atomic nucleus .
The number of protons in the atomic nucleus is what determines the atomic number of an element .
It has a mass of mass of 1.67262 × 10⁻²⁷ kg
An electron is a negatively charged particle of an atom.
Electrons exist outside of the atom nucleus. Each electron carries one unit of negative charge -1.602 x 10⁻¹⁹ coulomb .
Hence , protons and neutrons subatomic particles are primarily responsible for giving an atom its mass .
Learn more about protons and neutrons ,here:
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What is the controversy surrounding these craters? What do you think?
The controversy over lunar craters involves two main theories: volcanic activity and meteoric impacts.
The controversy surrounding lunar craters primarily focuses on their origin. One theory suggests volcanic activity akin to terrestrial calderas, such as Crater Lake in Oregon. However, this theory has largely been abandoned due to the lack of lava flows and insufficient debris around lunar craters to suggest volcanic origins. Instead, many scientists now support the impact theory, which proposes that these craters were formed by the collision of meteorites with the moon's surface. Significant objections arise from the observation that most lunar craters appear round, as if struck by objects falling directly towards the moon. Critics argue that meteorites, which typically travel at high velocities, would more likely strike at oblique angles, creating elongated gouges rather than round craters.
Despite these objections, the impact theory is supported by the presence of features such as rays extending from the craters, indicative of high-energy impacts that pulverize rock into powder and eject it across the moon's surface. Large craters, such as the Aitken Basin, and maria on the Moon further challenge both volcanic and impact theories. The Aitken Basin for example, is vast, and maria demonstrate how large impacts can penetrate deep enough to allow lava flow from the lunar interior to fill basins. Additionally, when comparing Earth to other celestial bodies, we see fewer craters on our planet due to atmospheric and geological activity. This difference helps in understanding Earth's unique history.
What volume in mL of a 0.763 M solution of BaI2 would be required if you wanted 0.0131 moles of solute? _____ mL (Picture Attached)
Answer:
The right answer is V = 17.2 mL
Explanation:
Knowing that the the relation between No. of moles and concentration:No. of moles = C * V
where,
C is the concentration in morality and
V is the volume in liter
so you can calculate the volume using:
V = (No. of moles / C) = (0.0131 mol / 0.763 mol/L)
V = 0.0172 L
Then yo need to convert the volume from Liter to milliliterV = 0.0172 L * (1000 mL / 1 L)
V = 17.2 mL
So, the right answer is V = 17.2 mL
What does the octane rating of gasoline tell you about the gasoline? Where can you see the octane rating of the gasoline you buy?
Answer:
Explanation:
The Octane rating is the % Octane in the grade that you are buying. In the United States, the octane rating of the cheapest gas is around 85%. In Canada, it is about 87% which in the states is the mid grade.
As soon as you take out the nozzle from its container, you have to press a large colored button to pick the octane rating. The button is so large and the writing is so limited, that you cannot miss the grade. Usually they are put together on the pump like this
87 89 91
I've given you the Canadian numbers; I'm not sure what they are in the US, but the numbers I've used are pretty close.