Answer: The only force that acts between particles of helium gas is Vanderwaal forces.
Explanation:
When molecules are uncharged in nature but still combined together due to the dipole moment of elements then this force holding the molecules together is known as Vanderwaal forces.
This force is weak in nature.
For example, particles of helium gas has Vanderwaal force between its atoms.
Thus, we can conclude that the only force that acts between particles of helium gas is Vanderwaal forces.
Which of the following organisms is a tertiary consumer
In the real world, a tertiary consumer can eat many different animals and even plants sometimes. This means that they can actually be carnivorous or omnivorous. Some examples of tertiary consumers include, birds of prey, big cats, and foxes.
How many tiny frogs sitting next to each other would measure the same length as a Blue Whale?
Answer:
About 2,500
Explanation:
The blue whale is the largest animal on Earth. The length of a blue whale is about 25 m, although is is said the largest confirmed measure is 29.9m.
The tiny frogs measure about 10mm.
You can estimate the number of tiny frogs that have the same length as a blue whale dividing the approximate average length of a blue whale by the approximate average length of the tiny frogs.
First convert 25m to mm:
25m × 1,000mm/m = 25,000 mmNow, divide:
25,000mm / 10mm = 2,500Hence, about 2,500 tiny frogs sitting next to each other would measure the same length as a blue whale.
Answer:
LOOK BELOW
Explanation:
Well a female is 82ft and a male is 79ft so we will just go with both answers. A tiny frog is about a estimate length of 0.27 inches so you would have to divide and or multiply 82 by 0.27 getting your first length then do the same with teh next one and thats you answer! hope i helped bby :3
how does coal convert to electrical energy?
Answer:
Coal-fired plants produce electricity by burning coal in a boiler to produce steam. The steam produced, under tremendous pressure, flows into a turbine, which spins a generator to create electricity. The steam is then cooled, condensed back into water and returned to the boiler to start the process over.
Explanation:
How many calories are needed to raise the temperature of 25 grams of water form 50°C to 70°C? The specific heat of water is 1cal/g°C
Answer:
500 calories
Explanation:
Heat gained or lost is mass times specific heat times change in temperature. Using this formula, the answer is 500 calories.
Which of the following are not at equilibrium? Check all that apply. Check all that apply. The concentrations of reactants and the products are not constant. The rate of the forward reaction does not change. The rates of the forward and reverse reactions are equal.
The concentrations of reactants and the products are not constant and the rates of the forward and reverse reactions are equal. and these reactions are not at equilibrium.
Explanation:
The conditions to attain equilibrium is that,
Conversion of reactant to product and vice versa occurs at the same rate.The system is a closed system.The temperature remains constant.Concentration of every substance remains constant.Rate of forward and reverse reactions will be different.So the answer is The concentrations of reactants and the products are not constant and the rates of the forward and reverse reactions are equal.
A system is at equilibrium when the rates of forward and reverse reactions are equal and the concentrations of reactants and products are constant. Thus, any changes in concentrations or reaction rates indicate that the system is not at equilibrium.
Explanation:Based on Chemical Equilibrium principles, a system is at equilibrium when the rates of the forward and reverse reactions are equal, and the concentrations of reactants and products are constant. Therefore, if the concentrations of the reactants and the products are not constant, the system is not at equilibrium. Similarly, if there is a condition where the rate of the forward or reverse reaction does not change, the system is also not at equilibrium.
This means that even if the forward and reverse reaction rates are equal, but the concentrations are still fluctuating, the system hasn't reached equilibrium yet. So changes in the concentrations of the reactants or products indicate that the system is not in equilibrium. These principles form the basis of the Le Châtelier's principle.
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HELP!!!
Zn+CuCl2→ZnCl2+Cu
How many grams of ZnCl2 will be produced from 7.00 grams of Zn and 8.00 grams of CuCl2?
Answer:
The answer to your question is 8.1 g of ZnCl₂
Explanation:
Data
mass of ZnCl₂ = ?
mass of Zn = 7.0 g
mass of CuCl₂ = 8 g
Balanced chemical reaction
Zn + CuCl₂ ⇒ ZnCl₂ + Cu
Process
1.- Calculate the molar mass of the reactants
Zn = 65.4 g
CuCl₂ = 63.6 + (35.5 x 2) = 134.6 g
2.- Calculate the limiting reactant
theoretical yield CuCl₂ / Zn = 134.6/65.4 = 2.06
experimental yield CuCl₂ / Zn = 8/7 = 1.1
The limiting reactant is CuCl₂ because the experimental yield was lower than the theoretical yield.
3.- Use proportions to calculate the mass of ZnCl₂
molar mass of ZnCl₂ = 65.4 + (35.5 x 2) = 136.4 g
134.6 g of CuCl₂ ---------------- 136.4 g of ZnCl₂
8 g ---------------- x
x = (8 x 136.4) / 134.6
x = 8.1 g of ZnCl₂
Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle.
Answer:
Question is incomplete, the complete question is;
Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.
Answer is;
Acid X is sulfuric acid (H₂SO₄) and the gas evolved Y is hydrogen (H₂).
Explanation:
Acids react with metals to produce a salt and hydrogen. The metal ions replace the hydrogen ions in the acids.
When Zinc (Zn) granules are treated with sulfuric acid (H₂SO₄), the products are zinc sulfate (ZnSO₄) and hydrogen (H₂).
H₂SO₄ + Zn → ZnSO₄ + H₂
This reaction is a redox reaction, where reduction and oxidation happen at the same time. Zinc atoms are oxidized since they lose electrons (Zn → Zn²⁺ + 2e⁻), and hydrogen ions are reduced since they gain electrons (2H⁺ + 2e⁻ → H₂).
Hydrogen is a highly flammable gas, which reacts with oxygen molecules to produce water, combined with an explosive release of energy. But a source of energy like a small spark is needed for this reaction to take place since hydrogen does not react with oxygen at room temperature.
The activation energy (energy required for a reaction to proceed) of hydrogen is low, so only a small amount of energy is needed to trigger a reaction with oxygen. When hydrogen is brought near to a burning candle, it reacts with oxygen in the air in a small explosion by producing a squeaky pop sound.
In the question, Zinc granules are treated with an acid X to form zinc sulfate (ZnSO₄) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. So, now it is clear that the acid X is sulfuric acid (H₂SO₄) and the gas evolved Y is hydrogen (H₂).
why can a magnet separate iron and sulphur in a mixture but not a compound?
Answer:
A compound is different from elements in that it is made from the chemical union of two or more elements. ... Mixtures are different from compounds in that they are easily separated. A magnet could be used to separate the iron from the sulfur, because iron is attracted to magnets, while sulfur is not.
Explanation:
What is the definition of Amplitude?
Answer:
the maximum extent of a vibration or oscillation, measured from the position of equilibrium.
Explanation:physics
Amplitude, within a Physics context, describes the maximum displacement from an equilibrium or rest position. It is especially important in the study of waves and sound, affecting the height of waves and the perceived volume of sound respectively.
Explanation:The term Amplitude in physics refers to the maximum displacement from the equilibrium or rest position. Precisely, it can be defined as the distance from the equilibrium position of the medium to a compression or a rarefaction. For example, in the context of waves, the amplitude is the measurement of the wave's height from the equilibrium position (mid-point or rest point of the wave) to its crest (highest point).
When applied to sound, amplitude refers to the magnitude of compression and expansion in sound waves. Sound with higher amplitudes are perceived as louder, measured in decibels (dB), due to their greater displacement from the point of equilibrium.
The units for measuring amplitude can vary according to the context and can be centimeters, meters, or any other convenient unit of distance. As the Amplitude increases, the intensity or loudness of the wave also increases correspondingly. Therefore, amplitude plays an essential role in determining the characteristics and impact of the wave.
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threats faced by the Everglades and the Louisiana wetlands.
Answer:
Invasive species, runoff pollution, and climate change.
Explanation:
Invasive species, such as Burmese pythons, threaten the Florida Everglades because they are not native to the natural habitat. Pythons eat the native animals, but they don't have any predators.
Pollution from nearby farms and roads enters the water and damages the ecosystem of the Everglades and Louisiana wetlands. Toxic chemicals lead to detrimental effects for both humans and wildlife.
Humans have drained swampy areas to allow for development. However, this has led to the Everglades drying up and even burning in recent years.
What type of reaction is:
Answer:
The answer to your question is Combustion
Explanation:
Chemical reaction
2C₄H₁₀ + 13 O₂ ⇒ 8 CO₂ + 10 H₂O
A combustion reaction is a chemical reaction in which the reactants are always a molecule with carbon (organic molecule) and oxygen (O₂), and the products are always carbon dioxide (CO₂) and water (H₂O).
Conclusion
The chemical reaction of this problem is combustion
How many mL of 1.01 M LiNO3 solution has 6.63 g of solute?
Answer:
The answer to your question is 97 ml
Explanation:
Data
volume = ? ml
concentration = 1.01 M LiNO₃
mass = 6.63 g
Process
1.- Calculate the molecular weight of LiNO₃
LiNO₃ = (1 x 6.94) + (1 x 14) + (16 x 3)
= 6.94 + 14 + 48
= 69 g
2.- Calculate the moles of LiNO₃
69 g ------------------ 1 mol
6.63 g --------------- x
x = (6.63 x 1) / 69
x = 0.096 moles
3.- Calculate the volume
Molarity = moles / volume
-Solve for volume
Volume = Molarity x moles
-Substitution
Volume = 1.01 x 0.096
-Result
Volume = 0.097 l or 97 ml
The number of mL of of 1.01 M LiNO3 solution when solution has 6.63 g of solute should be 97 ml.
Calculation of the number of mL:Since
concentration = 1.01 M LiNO₃
mass = 6.63 g
First we have to determine the molecular weight of LiNO₃ i.e.
LiNO₃ = (1 x 6.94) + (1 x 14) + (16 x 3)
= 6.94 + 14 + 48
= 69 g
Now the moles of LiNO₃
69 g ------------------ 1 mol
6.63 g --------------- x
x = (6.63 x 1) / 69
x = 0.096 moles
Now the volume is
Molarity = moles / volume
It can be like
Volume = Molarity x moles
= 1.01 x 0.096
= 0.097 l or 97 ml
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What is energy?
-The ability to do work or cause change
-Anything that has mass and takes up space
-Substances bonded together
-Both a and b
Answer:
Both a and b
Hope this answer helps you
Final answer:
Energy is the ability to do work or cause change and comes in many forms like mechanical, electrical, kinetic, and potential. It is a fundamental concept in physics, involving the transfer and conservation of energy in various processes.
Explanation:
What is Energy?
Energy is a fundamental concept in physics, often defined as the capacity to do work or cause change. The scientific concept of work corresponds to applying a force over a distance, like pushing a heavy object across the floor or lifting a weight. Energy can also be transferred and recognized in other forms, such as heat or light. There are various forms of energy, such as mechanical, electrical, kinetic, and potential energy. For instance, when inflating a bicycle tire, we do work by moving air against the resistance of the air already in the tire, exemplifying mechanical work.
In a broader sense, energy enables the movement of matter and the execution of actions, and it is conserved in physical processes, converting from one form to another but never disappearing.
Rank the following solutions from the highest [H3O+] (1) to the lowest [H3O+] (5).
[H3O+] = 3.16 × 10–4 M
[OH–] = 4.35 × 10–2 M
pH = 1.05
pOH = 7.0
pOH = 4.0
Answer:
1.) 2
2.) 5
3.)1
4.)3
5.)4
Explanation:
this in edge 2020
The solution ranked with the presence of hydronium ion concentration from higher to lower is pH = 1.05 > [OH⁻] = 4.35 * 10 ⁻² > [H₃O⁺] = 3.16 * 10⁻⁴ M > pOH = 7 > pOH = 4.
What is pH and pOH?The pH and pOH can be given as the logarithmic value of the presence of hydrogen or hydronium and hydroxide ion concentration in a solution respectively.
The hydronium ion concentration can be given as:
[H₃O⁺] = antilog (-pH)
The hydronium ion concentration of pH = 1.05 is:[H₃O⁺] = 10⁻¹.⁰⁵
[H₃O⁺] = 0.089 M
The pH from pOH can be calculated as:
pH = 14 - pOH
pH of solution with pOH 7 is:pH = 14 - 7
pH = 7
The hydronium ion concentration can be given as:
[H₃O⁺] = 10⁻⁷
[H₃O⁺] = 1 * 10⁻⁷ M
The pH of solution with pOH 4 isL:pH = 14 - 4
pH = 10
The hydronium ion concentration can be given as:
[H₃O⁺] = 10⁻¹⁰
[H₃O⁺] = 1 * 10⁻¹⁰ M
Thus, the solutions from highest to lowest hydronium ion concentration can be ranked as:
pH = 1.05 > [OH⁻] = 4.35 * 10 ⁻² > [H₃O⁺] = 3.16 * 10⁻⁴ M > pOH = 7 > pOH = 4.
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!!!!!!!!!! When atoms in covalent bond share electrons equally, the bond is said to be blank
Answer:
The bond is considered to be nonpolar.Explanation:
A nonpolar covalent bond is created when atoms share their electrons equally.
Polar covalent bond is created when atoms share their electrons unequally.
What is double substitution
Answer:
In Tcl the words in a command are always exposed to two layers of interpretation: First, Tcl interprets them and prepares them as arguments to a routine. Second, the routine interprets those arguments according to its own principles. double substitution occurs when Tcl performs substitutions on original command and a routine then performs substitutions on the resulting arguments. Care is required in these cases to avoid errors, including vulnerability to injection attacks.
Explanation:
this probably wont help but here
Solubility
Which of the following are nonelectrolytes? *
Pentacarbon decahydride (C5H10)
O
Magnesium chloride (MgCl2)
O
Copper phosphate (Cu3(PO4)2]
Sulfur trioxide (SO3)
O
0
Aluminum oxide (A1203)
Phosphorus pentachloride (PC15)
Glucose (C6H1206)
Non electrolytes are Pentacarbon decahydride, Phosphorus pentachloride, Glucose.
Explanation:
Non electrolytes do not exist as ions in aqueous solution. Since it does not get dissociated into ions, these non electrolytes do not conduct electricity when it is dissolved or it is heated or melted.
Pentacarbon decahydride is a non electrolyte.
Magnesium chloride is an electrolyte.
Copper phosphate is an electrolyte
Sulfur trioxide is an electrolyte.
Aluminum oxide is an electrolyte
Phosphorus pentachloride do not get dissociated into its ions so it is a non-electrolyte.
Glucose gets dissolved in water but do not dissociate into ions, so it is a non electrolyte.
How many moles are present in 4.7 liters of Argon gas at STP?
The answer for the following problems is mentioned below.
Therefore the number of moles present in Argon is 0.20 moles.Explanation:
Mole:
The mass of a substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of [tex]C^{12}[/tex].
Given:
volume (v) = 4.7 litres
Volume of argon at STP conditions = 22.4 litres
To find:
volume of argon at STP conditions
We know;
n = [tex]\frac{v}{V}[/tex]
where;
n represents the no of moles
v represents the volume of the argon
V represents the volume of argon at STP
volume of the argon at STP conditions is 22.4 litres
So;
n = [tex]\frac{4.7}{22.4}[/tex]
n = 0.20 moles
Therefore the number of moles present in Argon is 0.20 moles.
There are 0.107 moles of Argon gas present in 4.7 liters at STP.
To determine the number of moles of Argon gas present in 4.7 liters at STP (Standard Temperature and Pressure), we can use the Ideal Gas Law, which is given by:
[tex]\[ PV = nRT \][/tex]
where:
- [tex]\( P \)[/tex] is the pressure,
- [tex]\( V \)[/tex] is the volume,
- [tex]\( n \)[/tex] is the number of moles,
- [tex]\( R \)[/tex] is the ideal gas constant, and
- [tex]\( T \)[/tex] is the temperature.
At STP, the conditions are defined as:
- [tex]\( P = 1 \)[/tex] atmosphere (atm),
- [tex]\( T = 273.15 \)[/tex] Kelvin (K).
The value of the ideal gas constant [tex]\( R \)[/tex] is approximately [tex]\( 0.0821 \frac{\text{L} \cdot \text{atm}}{\text{mol} \cdot \text{K}} \)[/tex].
We can rearrange the Ideal Gas Law to solve for n (the number of moles):
[tex]\[ n = \frac{PV}{RT} \][/tex]
Given that [tex]\( V = 4.7 \)[/tex] liters, we can plug in the values:
[tex]\[ n = \frac{(1 \text{ atm})(4.7 \text{ L})}{(0.0821 \frac{\text{L} \cdot \text{atm}}{\text{mol} \cdot \text{K}})(273.15 \text{ K})} \][/tex]
[tex]\[ n = \frac{4.7}{0.0821 \times 273.15} \][/tex]
[tex]\[ n = \frac{4.7}{22.41} \][/tex]
[tex]\[ n \approx 0.107 \text{ moles} \][/tex]
Therefore, there are approximately 0.107 moles of Argon gas in 4.7 liters at STP.
The eastfork forest contains pine trees, birch trees, and dogwood trees. All the trees in this forest are considered a(n) _____
Answer:
The answer is community
I got it correct
Explanation:
Answer:
community is the answer
Explanation:
Suppose the reaction Ca3(PO4)2 + 3H2SO4 --> 3CaSO4 + 2H3PO4 is carried out starting with
153 g of Ca3(PO4)2
and 76.8 g of H2SO4
How many grams of phosphoric acid will be produced.
Answer:
The answer to your question is 51.2 g of H₃PO₄
Explanation:
Data
mass of Ca₃(PO₄)₂ = 153 g
mass of H₂SO₄ = 76.8 g
mass of H₃PO₄ = ?
Balanced chemical reaction
Ca₃(PO₄)₂ + 3H₂SO₄ ⇒ 3CaSO₄ + 2H₃PO₄
Process
1.- Calculate the molar mass of the reactants
Ca₃(PO₄)₂ = (3 x 40) + (2 x 31) + (8 x 16) = 120 + 62 + 128 = 310 g
H₂SO₄ = (1 x 2) + (32 x 1) + (16 x 4) = 2 + 32 + 64 = 98 g
2.- Calculate the limiting reactant
Theoretical yield Ca₃(PO₄)₂ / H₂SO₄ = 310 / 3(98) = 1.05
Experimental yield Ca₃(PO₄)₂ / H₂SO₄ = 153 / 76.8 = 1.99
The limiting reactant is H₂SO₄ because the experimental proportion was higher than the theoretical proportion.
3.- Calculate the molar mass of H₃PO₄
H₃PO₄ = (1 x 3) + (31 x 1) + (16 x 4) = 3 + 31 + 64 = 98 g
4.- Calculate the mass of H₃PO₄
3(98) g of H₂SO₄ ------------------ 2(98) g of H₃PO₄
76.8 g of H₂SO₄ ------------------ x
x = (76.8 x 2 x 98) / (3 x 98)
x = 15052.8 / 294
x = 51.2 g of H₃PO₄
How do power plants use nuclear fission to generate electricity?
A. Fission creates new elements from which electricity can be generated.
B. Fission releases energy in the form of electricity.
C. Fission breaks down radioactive materials into electrically charged materials.
D. Fission produces heat, which is used to produce steam to power generators.
how many moles of glucose are in 19.1 g of glucose
Answer:
There are 0,106 mol of glucose in 19,1g.
Explanation:
First we calculate the weight of 1 mole of Glucose whose molecular formula is C6 H12 0 6, with the atomic weights of each element obtained from the periodic table. Then, by means of a simple rule of three we calculate the moles that are in 19.1 grams:
Weight 1 mol C6H1206 = (Weight C)x 6 + (Weight H)x12 + (Weight 0)x6=
= 12 g x 6 + 1g x12 + 16 g x 6= 180 g/mol
180 g ----1 mol glucose
19,1 g-----x= (19,1 g x 1 mol glucose)/ 180 g= 0,106 mol
Final answer:
To find the number of moles of glucose in 19.1 grams, divide the mass by the molar mass of glucose (180 g/mol), resulting in approximately 0.106 moles.
Explanation:
The student's question is about determining the number of moles of glucose in a given mass of glucose. To calculate this, we need to use the molar mass of glucose, which is 180 g/mol. The mass of glucose given is 19.1 grams.
To find the number of moles, we use the formula:
Number of moles = mass (g) / molar mass (g/mol)
So for glucose, it would be:
Number of moles of glucose = 19.1 g / 180 g/mol
Calculating this gives us:
Number of moles of glucose = 0.106 moles (rounded to three decimal places)
It is easier for a large corporation to offer benefits to its employees than for a smaller company.
True
False
Answer:
true
Explanation:
Answer: True
Explanation: Because the large company has more people and is making more money than the smaller company
Dalton's law states that
A) gas volume and temperature are directly proportional.
B) gas pressure is inversely proportional to gas volume.
C) in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture.
D) gas volume and pressure are inversely proportional.
E) the volume of gas that will dissolve in a solvent is proportional to the solubility of the gas and the gas pressure.
Answer:
C) in a mixture of gases suck as air, the total pressure is the sum of the individual partial pressure of the gasses in the mixture
Dalton's law, or the law of partial pressures, states that in a mixture of gases, the total pressure is the sum of the individual partial pressures of the gases in the mixture.
Explanation:The correct answer to the question regarding Dalton's law is that, C) in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture. This is because Dalton's law, also referred to as Dalton's law of partial pressures, states that the total pressure exerted by a mixture of gases is the sum of the partial pressures of each individual gas in the mixture.
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Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits.
True
False
A 2.50 g sample of zinc is heated, and then placed in a calorimeter containing 65.0 g of water. Temperature of water increases from 20.00 oC to 22.50 oC. The specific heat of zinc is 0.390 J/g oC. Assuming no heat loss, what was the initial temperature of the zinc metal sample?
The initial temperature of the zinc metal is 720 ° C
Explanation:
Given data,
Zn
m=2.50 g
C=0.390 J/g° C
ΔT= (22.50° C- Ti)
H2O
m= 65.0 g
C= 4.184 J/ g° C
ΔT = 2.50° C
We have the formula,
qH20= - qZn
(65.0 g) (4.184 J/ g° C) (ΔT 2.50° C)=(2.50 g) ( 0.390 J/g° C) (ΔT 22.50° C- Ti)
solving the equation we get,
697.3 ° C=- 22.50 ° C+Ti
Ti= 720 ° C
The initial temperature of the zinc metal is 720 ° C
A sample of hydrogen gas, H2(g), is placed in a 0.500 L container at 295 K. The gas pressure is
1.442 bar.
The question relates to the ideal gas law in chemistry, which connects the pressure, volume, temperature, and number of moles of hydrogen gas in a given scenario.
Explanation:The student's question involves a sample of hydrogen gas (H2), which is placed in a 0.500 L container at a temperature of 295 K with a pressure of 1.442 bar. This scenario typically deals with concepts such as gas laws and molar calculations from chemistry, specifically the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas.
To solve problems like this, one would normally use the ideal gas law equation: PV = nRT. However, without the number of moles or the specific R constant provided, one cannot calculate the moles directly. Additional information or a different question that involves changing conditions where the ideal gas law can be applied might be necessary.
What is the purpose of a salt bridge in a voltaic cell consisting of separate breakers? Why is a salt bridge unnecessary in a single-breaker voltaic cell in which the compartments are separated by a porous divider?
Answer:
1. The salt bridge completes the circuit of the voltaic cell to allow the flow of current
2. The porous divider performs the function of a salt bridge, hence a salt bridge is unnecessary in a single-beaker voltaic cell
Explanation:
1. The oxidation and reduction half cells of a voltaic cell are connected by the salt bridge in other to ensure that the internal circuit is electrically neutral, to avoid the rapid reaction to reach equilibrium conditions which affects results in preventing voltage drop in the voltaic cell.
The salt bridge also aids in charge accumulation
2. In a single-beaker voltaic cell with the compartments separated by a porous divider, the function of the porous divider is the same as that of the salt bridge, hence the salt bridge is unnecessary.
Answer:
Explanation:
A salt bridge is a strong electrolytes and it's ion like KNO3,Consider a voltaic cell with two paths the anode half cell and the cathode half cell,it will be observed that when the cell is connected,electrons leaves through the wire from the anode which is subject to oxidation hence producing both electrons and positive ions in the anode,if more of the electrons leaves the anode,need arises to to ensure electrochemical neutrality in the cell,this is we're the salt bridge is much important because it provides the needed negative ions to counter balance the effect of this,also a reversed process occurs in the second half Cathodoc cell.
Also for a simply voltaic cell separated by a porous membrane the salt bridge is not needed because unlike the half cell connected by a salt bridge the porous membrane servea as a media of exchange of ions for the cells.
The three main types of scientific investigations are descriptive, comparative, and experimental. Which components are
included in all three types of investigations?
a scientific question
an independent variable
a dependent variable
a procedure
a control group
a conclusion
A chemistry student was asked to calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron(III) oxide. His calculation is shown below: 1.20
Answer:
1.6 moles of iron
Explanation:
-Metals reacts with oxygen to form oxides.
-The chemical reaction between oxygen and iron is written as below:
[tex]4Fe_{(s)}+3O_2_{(g)}->2Fe_2O_3_{(s)}[/tex]
-pu notice from the balanced chemiocal equation above that the mole ration of iron to oxygen is 4:3
-We equate and cross multiply to find moles of iron in the reaction;
[tex]Fe:O_2=4:3\\\\\\\frac{Fe}{O_2}=\frac{4}{3}\\\\\frac{Fe}{1.2}=\frac{4}{3}\\\\Fe=\frac{4\times 1.2}{3}\\\\=1.6\ moles[/tex]
Hence, 1.6 moles of iron reacts with 1.2 moles of oxygen in the above reaction.
To calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron(III) oxide, you need to determine the stoichiometric mole ratio from the balanced chemical equation. The ratio is 1 mole of iron to 1.5 moles of oxygen, which can be multiplied by 2 to get the balanced equation.
Explanation:To calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron(III) oxide, you need to determine the stoichiometric mole ratio from the balanced chemical equation. Based on the equation, the ratio is 1 mole of iron to 1.5 moles of oxygen. Since the ratio is not a whole number, you need to multiply it by 2 to get the smallest possible whole number subscripts while maintaining the correct iron-to-oxygen ratio. Therefore, the balanced equation is: 2 Fe + 1.5 O₂ → Fe₂O₃.