The balanced equation of the reaction is:
CoCl2 + F2 → CoF2 + Cl2
Now, we will follow the next steps to solve the question.
1. We find the moles present in 124.13 g of cobalt(II)fluoride (CoF2) using the molar molar mass of CoF2. The molar mass of CoF2 is: 96.93g/mol
2. By stoichiometry we find the moles of fluorine (F2) needed. Since the ratio CoF2 to F2 is 1, the moles will be the same as those produced from cobalt(II)fluoride.
3. We find the grams of fluorine by multiplying the moles by the molar mass of fluorine. The molar mass of fluorine is 38.00 g/mol
Let's proceed with the calculations:
1. Moles of CoF2
[tex]\begin{gathered} molCoF_2=givengCoF_2\times\frac{1molCoF_2}{MolarMass,gCoF_2} \\ molCoF_2=124.13gCoF_2\times\frac{1molCoF_2}{96.93gCoF_2}=1.28molCoF_2 \end{gathered}[/tex]2. Moles of F2
[tex]molF_2=1.28molCoF_2\times\frac{1molF_2}{1molCoF_2}=1.28molF_2[/tex]3. Grams of F2
[tex]\begin{gathered} gF_2=givenmolF_2\times\frac{MolarMass,gF_2}{1molF_2} \\ gF_2=1.28molF_2\times\frac{38.00gF_2}{1molF_2}=48.66gF_2 \end{gathered}[/tex]Answer: To produce 124.13 grams of cobalt(II)fluoride are required 48.66grams of fluorine
how many moles in 518 grams of CaCO3
Answer:
[tex]5.18\text{ moles}[/tex]Explanation:
Here, we want to get the number of moles in the given mass
Mathematically:
[tex]Number\text{ of moles = }\frac{mass}{molar\text{ mass}}[/tex]The molar mass of CaCO3 is 100 g/mol
The number of moles is thus:
[tex]Number\text{ of moles = }\frac{518}{100}\text{ = 5.18 moles}[/tex]when hydrogen, H+, and chlorine,Cl- are mixed, what are they called?
When hydrogen (H+) and chlorine (Cl-) are mixed, they are called hydrochloric acid.
How hydrochloric acid is formed?Hydrochloric acid is prepared by combining the gaseous hydrogen chloride with water. Due to the corrosive nature of the acid, ceramic, glass, or tantalum apparatus is used. Hydrochloric acid is also known as muriatic acid. It is also known as an aqueous solution of hydrogen chloride. It is a colorless solution with a pungent smell. It is classified as a strong acid because of more hydrogen atoms. It is a part of the gastric acid that is present in the digestive systems of animal species such as humans. Hydrochloric acid is an important laboratory and industrial chemical.
So we can conclude that hydrochloric acid is formed when hydrogen and chlorine are mixed.
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When working with electric charges, what symbol is used in equations torepresent the electric force on an object?A. rB. qC. FeD. E
A. r: distance
B. q: charge
C. Fe: electric force
D. E: Electric field
So the answer is option C.
What does an Arrhenius base do when it interacts with water?
Answer:
Explanation:
Here, we want to get what will happen when an Atthenius base interacts with water
By definition, an Arrhenius base increases the concentration of hydroxide ions in aqueous solutions
What this simply mean is that when an Arrhenius base comes in contact with water, the solution is expected to have an increase in the concentration of hydroxide ion. This can be measures pH wise and we expect an increase in the pH of the solution from 7
How fast does human hair typically grow?
A.
Two centimeters per month
B.
One inch per month
C.
One centimeter per month
D.
Two centimeters every year
Answer: One centimeter per month.
Explanation: Technically speaking, human hair grows about 1/2 inch a month or 6 inches a year. 1/2 inch is approx 1.27 centimeters, or in other words, one centimeter a month. Therefore, that's your answer.
Let me know if I got it right! :)
Answer:
1 centimeter per month
Explanation:
Human hair typically grows 6 inches in a year. Since there's 12 months, we can tell that hair grows 1/2 an inch per month. 1/2 an inch is about 1 cm.
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During the chlorination of silicon, chlorine gas is reacted with solid silicon to form silicon tetrachloride.Si(s) + 2Cl2(g) + heat - SiC|4(g)Which will not cause the reaction to shift towards the products?A) adding a catalystB) increasing the pressureC increasing the temperatureD) increasing the concentration of CL2(g)
Let's analyze each option to find what best fit as an answer:
A - the function of a catalyst is to lower the energy of activation in a reaction, causing it to occur in a faster way. Since this question is not much about energy or kinetics, this would be the best fit, adding a catalyst or not adding it would not be too influential in the shift of the reaction.
B - Increasing the pressure in a reaction containing gases will mostly favor the side with a lower value of moles, smaller amount of moles = less pressure, so if we add more pressure, the reaction will shift towards the side of the products
C - If we treat heat as a reactant, if we add more temperature, it will shift towards the products, to counteract this increase of temperature
D - Adding reactants will favor the reaction to shift towards the products
Therefore the answer is letter A
a graduated cylinder has a mass of 50 g when empty. When 30 mL of water is added the graduated cylinder has a mass of 120 g. If a rock is added to the graduated cylinder, the water level rises to 75 mL and the total mass is now 250 g. What is the dentisy of the rock?
The density of the solid object is obtained to be 2.89 g/mL.
What is density?The density is defined as the ratio of the mass to the volume of the object. In this case, the density is to be obtained by the use of the displacement method of the solving the problem.
Mass of the empty cylinder = 50 g
Mass of water and cylinder = 120 g
Mass of water alone = 70 g
Mass of water, cylinder and the object = 250 g
Mass of the object = 250 g - 120 g = 130 g
Volume of the object = 75 mL - 30 mL = 45 mL
Density of the object = 130 g/45 mL
= 2.89 g/mL
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At 571.6 mmHg and 25 °C, a gas sample has a volume of 2,275 ml Determine the final pressure (in mmHg) at a volume of 1,255 mL and a temperature of 175°C? Show all your work
Here, there are 2 conditions of the gas here.
The next equation is used: (1)
[tex]\frac{P1xV1}{T1}=\frac{P2xV2}{T2}[/tex]Data: conditions 1
P1 = pressure, in mmHg = 571.6 mmHg
T1 = temperature, in K = 25 °C + 273 = 298 K
V1 = 2,275 mL
-------------
Data: conditions 2
P2 = needs to be calculated
T2 = 175 °C + 273 = 448 K
V2 = 1,255 mL
--------------
From (1), P2 is cleared:
(P1 x V1/T1) x T2/V2 = P2
(571.6 mmHg x 2,275 mL/298 K) x (448 K/1,255 mL) = P2
1558 mmHg = P2
Answer: P2 = 1558 mmHg
A 150 g piece of iron (Cp = 25.09 J/(mol-°C)) was heated to a temperature of
47°C and then placed in contact with a 275 g piece of copper at 20°C (Cp = 25.46
J/(mol-°C)). What is the final temperature of the two pieces of metal?
Final temperature of the two pieces of metal is 32.25°C
Temprature is the degree of hotness or coldness of the object
Here given data is
Mass of iron = 150 g
Mass of copper = 275 g
Specific heat of iron = 25.09 J/mol°C
Specific heat of copper = 25.46J/mol°C
Temprature in iron = 47°C = initial temprature = T₁
Temprature in copper = 20°C = initial temprature = T₁'
So here we have to find final temprature of two pieces of metal =?
So, the formula is Q =mcΔT
Q = (150 g - 275 g) × (25.09 J/mol°C - 25.46J/mol°C) × ( 47°C-20°C )
Q = 125×0.37×27
Q = 243 J
243 J/125×0.37 = 5.25°C = change in temprature
Initial temprature = 27°C
Final temprature = ?
ΔT = T₂ - T₁
27°C = T₂ - 5.25°C
T₂ = 27°C + 5.25°C
T₂ = 32.25°C
Final temperature of the two pieces of metal is 32.25°C
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6. Initially, a sample of nitrogen gas is found in a pressure of 4.62 atm under the temperature of 27.0℃. Find the change in temperature of the gas when the pressure is increased to 5.59 atm.
Answer: ΔT = 62.98
Explanation:
This can be done using Gay Lusac's Law which states that Pressure is proportional to temperature
So, we take p1 = 4.62 atm, t1 = (27+273)°K, p2 = 5.59 atm, t2=?
now, P1/T1 = P2/T2
From here find out T2 which would be in Kelvin and then subtract 273 to convert it into celsius. Then find the difference between T1 and T2 and you should have your answer.
During a day that is 39°F outside, it is also mid-fall. There is a nearby pond, what assumptions can you make about the temperature within that pond on that day?
The temperature should be between 30 °F and 60 °F because the temperature outside is 39 °F, so the water in the pond should have a temperature range that includes this temperature.
Therefore, the answer is B.
The wavelength of green light from a traffic signal is approximately 5.2 * 10^7 m. Calculate its frequency
If the wavelength of green light from a traffic signal is approximately 5.2 ×10⁷ m , then the frequency of the light would be 5.769 × 10¹⁶ Hz .
What is Wavelength?It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.
C = λν
The frequency of the green light = 3 × 10⁸ / 5.2 ×10⁷
= 5.769 × 10¹⁶ Hz
Thus , If the wavelength of green light from a traffic signal is approximately 5.2 ×10⁷ m , then the frequency of the light would be 5.769 × 10¹⁶ Hz .
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In the following reaction, What quantity in moles of CH₃OH are required to give off 1501 kJ of heat? 2 CH₃OH (l) + 3 O₂ (g) → 2 CO₂ (g) + 4 H₂O(g) ∆H° = -1280. kJ
Taking into account the definition of enthalpy of a chemical reaction, 2.345 moles of CH₃OH are required to give off 1501 kJ of heat
Definition of enthalpy of a chemical reactionThe enthalpy of a chemical reaction as the heat absorbed or released in a chemical reaction when chemicals are transformed into a chemical reaction at constant pressure.
The enthalpy is an extensive property, that is, it depends on the amount of matter present.
Amount of moles of CH₃OHIn this case, the balanced reaction is:
2 CH₃OH (l) + 3 O₂ (g) → 2 CO₂ (g) + 4 H₂O(g)
and the enthalpy reaction ∆H° has a value of -1280 kJ/mol.
This equation indicates that when 2 moles of CH₃OH reacts with 3 moles of O₂, 1280 kJ of heat is released.
If it is required to give off 1501 kJ of heat, you can apply the following rule of three: If 1280 kJ of heat is released by 2 moles of CH₃OH, 1501 kJ of heat is released by how many moles of CH₃OH?
amount of moles= (1501 kJ× 2 moles of CH₃OH)÷ 1280 kJ
amount of moles= 2.345 moles of CH₃OH
In summary, the amount of moles required are 2.345 moles.
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Explain an element Magnesium would need to react with in order to attain a subscript of 3?
The chemical element which magnesium would combine with in order to attain a subscript of 3 is nitrogen which result in the formation magnesium nitride ( Mg₃N₂ )
How magnesium attains a subscript of 3Magnesium is a metallic element which belongs to group 2 and and has a valence electron of 2. This means that in an electrovalent combination, magnesium loses 2 valence electrons to nitrogen to become Mg2+ ion. To complete this bonding, nitrogen which has 5 valence electrons accepts 3 of Mg2+ ions in addition with with its two N3− ions to form magnesium nitride. When this happens, magnesium then attains a subscript of 3.
Magnesium nitride is an electovalent or ionic compound and the bond which exist in it is Ionic bond. It is used in the synthesis of ceramic substances.
So therefore, we can confirm from above that when magnesium reacts with nitrogen, it attains a subscript of 3.
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Nitrogen is the chemical element that magnesium would mix with to get a subscript of 3, leading to the production of magnesium nitride.
What are chemical elements?Chemical elements are defined as a type of atom, including the pure substance made entirely of that type, with a specific number of protons in its nucleus.
Magnesium is a metallic element with a valence electron number of 2, and it is a member of group 2. This indicates that magnesium loses two valence electrons to nitrogen in an electrovalent combination to form the Mg2+ ion. Nitrogen, which has five valence electrons, accepts three Mg2+ ions in addition to its two N3 ions to complete this bonding and create magnesium nitride. Magnesium then achieves a subscript of 3 when this occurs.
Thus, Nitrogen is the chemical element that magnesium would mix with to get a subscript of 3, leading to the production of magnesium nitride.
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Now that we have put a coefficient of 2 in front of Na3PO4 , what coefficient should go in front of NaCl to balance sodium ( Na )? 2Na3PO4+MgCl2→Mg3(PO4)2+?NaCl Express your answer numerically as an integer.
A coefficient of 2 has been put in front of Na₃PO₄, so to balance Na coefficient in front of NaCl will be 6.
The balanced equation of the reaction is -
2 Na₃PO₄ + 3 MgCl₂ → Mg₃(PO₄)₂ + 6 NaCl
This is a complete balance chemical equation of the given reaction with coefficient 6 in front of NaCl to balance Na.
Here,
We've been given a chemical equation which is unbalanced. A coefficient of 2 has been put in front of Na₃PO₄ and we are asked about what coefficient should go in front of NaCl so that the sodium Na is balanced. Since, there were total 3 Na before the coefficient was placed, but after putting the coefficient of 2, Na is 2 x 3, which is 6.
Therefore, an integer 6 is to be put in front of NaCl to balance Na in the equation.
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What has happened in the field of forensics in the past few decades?
A.
Very few members of the public have heard of a case dealing with forensics.
B.
The use of forensics is more popular with the public and law enforcement.
C.
Colleges have stopped offering courses and majors in forensic science.
D.
It has become completely detached from the criminal justice system.
Answer:
c
Explanation:
V atery few members of the public have heard of a case dealing with forensics. The use of forensics is more popular with the public and law enforcement. Colleges have stopped offering courses and majors in forensic science.
How many protons and neutrons are in an atom of Pm-147 ?
Promethium is the 61st element that you can find in the periodic table and the number 147 indicates the atomic mass.
Remember that the atomic number (in this case, 61) represents the number of protons, so there are 61 protons in Pm-147.
And to find the number of neutrons, we have to subtract the atomic number (61) from the atomic mass (147):
[tex]\#\text{ neutrons = 147-61 = 86.}[/tex]So, the final answer is that we have 61 protons and 86 neutrons of Pm-147.
How do you determine the ksp of copper carbonate with an absorption of 0.57 mol/L?
When copper carbonate disolves the following happens:
[tex]CuCO_3\rightarrow Cu^{+2}+CO_3^{-2}[/tex]The formula for the solubility product constant is:
[tex]Ksp=\text{ }\lbrack Cu^{+2}\rbrack x\lbrack CO_3^{-2}\rbrack[/tex]
As for every copper ion in solution there is one carbonate ion, we know that the concentration of both ions in solution is 0.57mol/l.
Now we calculate the constant:
[tex]Ksp=0.57\frac{mol}{L}\text{ x }0.57\frac{mol}{L}=\text{ }0.3249\text{ }\frac{mol^2}{L^2}[/tex]So the answer is Ksp= 0.3249 mol2/L2
Perform the following operation and express the answer in scientific notation 6.0 x 10^3-2.310^3 Would you please help me with this problem
Subtract the numbers and write the power 10^3
The answer is 8.3x10^3
A salt solution has a molarity of 1.5 M. How many mole of this salt are present in 2.0 L of this solution.A. 1.5 molesB. 2.0 molesC. 3.0 moles D. 0.75 mole
Answer:
[tex]C\text{ : 3.0 moles}[/tex]Explanation:
Here, we want to get the number of moles present in the solution
Mathematically:
[tex]Number\text{ of moles = molarity }\times\text{ volume in L}[/tex]From the question:
We have the molarity as 1.5 M
We have the volume as 2.0 L
Thus, we have the number of moles as:
[tex]1.5\text{ }\times\text{ 2 = 3.0 moles}[/tex]How many liters of oxygen gas are required to burn 6.82 L of acetylene (C2H2) at STP?
17.05 L of O₂ are needed to react with 6.82 L of acetylene gas C₂H₂ at STP.
The reaction to the given question is :
2 C₂H₂ + 5 O₂ → 4 CO₂ + 2 H₂O
From the equation we see
2 moles of C₂H₂ react with 5 moles of O₂
According to the equation,
2 liters of Acetylene reacts with = 5 liters of O₂
So,
6.82 L Acetylene will produce = X L of O₂
Solving for X,
X = ( 6.82 L × 5 L ) ÷ 2 L
X = 17.05 L of O₂
Thus, 17.05 L of O₂ is needed to react with 6.82 L of acetylene gas C₂H₂.
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Calculate the amount of zinc present in zinc carbonate.
Ca + ZnCO2(aq) --> CaCO3(aq) + Zn
The group of organic substances known as organic carbonic acids includes zinc carbonate. Compounds with the carbonic acid functional group are known as organic carbonic acids. Zinc carbonate is a substance with a very low acidity
Explain about the Zinc carbonate?An odourless, white, sand-like substance known as zinc carbonate. Cosmetics, lotions, ceramics, pottery, rubber, feed additives, and medications all use it.
Zinc (Zn), carbon (C), and oxygen make up the inorganic compound known as zinc carbonate (O). ZnCO3 is its chemical composition. Oxygen is -2, carbon is +4, and zinc has an oxidation state of +2.
With the chemical formula ZnCO3, zinc carbonate is a white, insoluble zinc salt. By reacting with the proper amounts of sulphate, it can be used to create the majority of straightforward zinc salts. Smithsonite, also known as zinc spar, is a mineral that contains zinc carbonate.
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Help don’t understand this
The chemical equation will be written as:
2C2H6 + 7O2 → 6H2O + 4CO2
What is ac Chemical Equation?Chemical formulas and symbols are used in chemical equations to depict a chemical reaction symbolically. A plus sign is placed between each entity in the reactants and products, and an arrow pointing in the direction of the products indicates the direction in which the reaction is taking place. The reactant entities are listed on the left and the product entities on the right. Chemical equations can be interspersed with structural (pictorial diagrams), symbolic, or both types of formulations. The absolute values of the stoichiometric numbers are represented by the coefficients placed next to the symbols and formulas of the entities.An arrow symbol, a series of reactants (the chemicals used to initiate the chemical reaction), and a list of products (the substances created during the chemical reaction) make up a chemical equation. Each substance is described by its chemical formula, which is sometimes followed by a figure known as the stoichiometric coefficient.Therefore,
The chemical equation will be written as:
2C2H6 + 7O2 → 6H2O + 4CO2
The Law of Conservation of Mass provides the foundation for balancing chemical equations. Stoichiometric coefficients must be added to products and reactants in order to balance the chemical equations. This is essential because all chemical equations must adhere to the laws of constant proportions and mass conservation, which dictate that the product side and reactant side of the equation must have the same number of atoms of each element.To learn more about Chemical Equations, refer to:
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Which is a common use for a type of electromagnetic radiation?
A tanning bed uses microwaves.
Water purification uses radio waves.
Thermal imaging uses infrared waves.
Weather radar uses ultraviolet waves.
Common use for a type of electromagnetic radiation is Thermal imaging uses infrared waves.
When magnetic field comes in contact with electric field than electromagnetic radiations are formed. The magnetic field and the electric field are perpendicular to each other. types of electromagnetic waves are : Radio waves, Microwaves, Infrared waves, Visible light , Ultraviolet waves, X- rays , gamma rays.
A tanning bed uses the ultraviolet waves
water purification uses the UV waves
Thermal imaging uses the infrared waves
weather radar use the Radio waves
Thus, Common use for a type of electromagnetic radiation is the Thermal imaging uses infrared waves.
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70 grams of potassium nitrate completely dissolve in a solution at 55°C. The same amount of solute remains dissolved when the temperature of the solution drops to 45°C, until a ____ crystal is added. At this point the excess solute rapidly falls out of the solution.
Explanation:
We form a supersaturated solution. At 45 °C the solution has more potassium nitrate that can be dissolved. The recrystallization of the excess dissolved solute can be started inserting a crystal that is called seed crystal.
Answer: seed
Reaction Data ReactantsProductsAl(NO3)3NaClNaNO3AlCl3Starting Amount in Reaction4 moles9 moles??Determine the maximum amount of NaNO3 that was produced during the experiment. Explain how you determined this amount. I've had help on this before but im still struggling.
Step 1: Write and balance the equation:
3 NaCl + Al(NO3)3 → AlCl3 + 3 NaNO3
Step 2: We need to find the limiting and excess reactant. For this, we need to look at the stoichiometric ratio between the reactants:
3 moles of NaCl reacts with 1 mole of Al(NO3)3.
Now we do a rule of 3 for both.
For 9 moles of NaCl:
3 moles of NaCl --- 1 mole of Al(NO3)3
9 moles of NaCl --- x mole of Al(NO3)3
3x = 9
x = 3 moles of Al(NO3)3
For 4 moles of Al(NO3)3:
3 moles of NaCl --- 1 mole of Al(NO3)3
x moles of NaCl --- 4 moles of Al(NO3)3
x = 12 moles of NaCl
As we can see, to react with 4 moles of Al(NO3)3 we should have 12 moles of NaCl, but we have just 9. So the NaCl is the limiting reactant and the excess reactant is Al(NO3)3.
Step 3: We need to look at the stoichiometric ratio between the limiting reactant (NaCl) and NaNO3:
3 moles of NaCl --- 3 moles of NaNO3
9 moles of NaCl --- x moles of NaNO3
x = 9 moles of NaNO3
Answer: The maximum amount of NaNO3 that was produced during the experiment is 9 moles.
What is the mass of 32.1 mL the density of copper is 8.96 g/mL
Answer:
288 g.
Explanation:
Measurements => Density.
Density is the ratio of the mass of an object to its volume:
[tex]D=\frac{m}{V},[/tex]where D is density, m is mass, and V is volume.
We have two data: the volume (32.1 mL) and the density (8.96 g/mL) and we need to find the mass.
We can solve for 'm' in the given equation and replace the given data, as follows:
[tex]\begin{gathered} m=D\cdot V, \\ \\ m=8.96\frac{g}{mL}\cdot32.1\text{ mL,} \\ \\ m=287.6\text{ g}\approx288\text{ g.} \end{gathered}[/tex]The answer would be that the mass is 288 g.
While performing the extraction experiment, you were confused between the organic layer and the aqueous one, what is the easiest way to tell which layer is which?
The easiest way to tell which layer is wich, while performing the extraction experiment is to run a little test.
The test will consist on mixing a sample of both layers in different recipients with water.
After mixing them, the recipient with a homogeneous phase will have the aqueous layer, and the other one will be the organic layer.
Answer: The layer on top.
Explanation:
Assuming you were completing an extraction experiment and had a setup similar to the one below then the organic layer will float on top of the aqueous since most non-halogenated organic solvents have a density of less than 1.
A given sample of gas is held in a container with the volume of 6.02 L with a temperature of 59.5℃ at a pressure of 1.20 atm. What is the final pressure
The final pressure of a sample of gas held in a container with a volume of 6.02 L and a temperature of 59.5℃ is 0.26atm.
How to calculate pressure?The pressure of a given gas can be calculated using Boyle's law equation as follows:
P₁V₁ = P₂V₂
Where;
P₁ = initial pressureV₁ = initial volumeP₂ = final pressureV₂ = final volumeT₁ = initial temperatureT₂ = final temperatureAccording to this question, a given sample of gas is held in a container with the volume of 6.02 L with a temperature of 59.5℃ at a pressure of 1.20 atm. The final pressure can be calculated as follows;
At STP;
V = 22.4LT = 273K1.2 × 6.02/332.5 = P × 22.4/273
0.0217 = 0.082P
P = 0.26atm
Therefore, 0.26atm is the final pressure of the gas.
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1) Isotopes of certain____ elements that spontaneously emit ____ and ____ from the ___.
2) In a nuclear fusion reaction, two small, light ____(hydrogen atoms) combine under extreme ____ and pressure to form one larger, heavier nucleus (helium).
1)Isotopes of certain radioactive elements that spontaneously emit radiation and rays from the nuclei.
2)In a nuclear fusion reaction, two small, light 'nuclei' (hydrogen atoms) combine under extreme 'temperature' and pressure to form one larger, heavier nucleus (helium).
What are nuclear fusion ?The Sun and other stars are powered by nuclear fusion reactions. A heavier nucleus is created when two light nuclei fuse together in such a fusion reaction. So because mass of the emerging single nucleus is smaller than that of the combined mass of the two initial nuclei, the process generates electricity. Remaining mass is converted to energy.
Why nuclear fusion is not possible?Normal electrostatic forces between positively charged nuclei prohibit them from coming close enough to smash and allow fusion to occur, hence fusion is not feasible.
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