According to the question the equilibrium constant for the reaction is 8.
What is equilibrium?Equilibrium is a state of balance where the forces of supply and demand in a market are equal. It is a point at which both buyers and sellers are satisfied with their current prices and quantity traded, and no further changes are expected to occur. It is a stable market situation where market participants do not feel the need to change their prices or quantity supplied and demanded. Equilibrium is an important concept in economics, as it helps to explain the behavior of markets and the dynamics of supply and demand.
To illustrate this, let's consider a hypothetical reaction, A + B ⇌ X + 2Y, and an equilibrium state with the following amounts of reactants and products:
Reactants: A (0.5 moles), B (0.5 moles)
Products: X (1 mole), Y (2 moles)
The equilibrium constant expression for the reaction is:
Kc = [X][Y]²/[A][B]
Substituting the moles of reactants and products at equilibrium, we get:
Kc = (1 mole)(2 moles)²/ (0.5 moles)(0.5 moles)
Kc = 8
Therefore, the equilibrium constant for the reaction is 8.
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What kind of materials absorb/transfer thermal energy better than others?
Answer: Metal and stone are considered good conductors since they can speedily transfer heat. Materials like wood, paper, air and cloth are poor conductors of heat.
1M + 2Gc + 3Cp 1Gc2MCp3 There are 6 pieces (reactants) to the left of the arrow and 1 piece to the right. This is supposed to represent a balanced equation, so how can 7 = 1?
The equation you provided appears to be unbalanced, as the number of atoms on the left side is not equal to the number of atoms on the right side.
To balance the equation, you need to adjust the coefficients (the numbers in front of the chemical formulas) so that the number of atoms of each element is the same on both sides of the equation.
Starting with the left side of the equation:
1M + 2Gc + 3Cp + 1Gc2MCp3
We can see that there are:
1 Manganese (Mn) atom
2 Carbon (C) atoms
3 Chlorine (Cl) atoms
1 Gadolinium (Gd) atom
2 Molybdenum (Mo) atoms
3 Copper (Cu) atoms
To balance the equation, we need to adjust the coefficients so that the number of atoms of each element is the same on the right side of the equation. Since there is only one piece (reactant) on the right side, we can simply write it as:
1X
where X represents any chemical formula.
To balance the equation, we can start by balancing the elements that appear only once on each side of the equation. In this case, there is only one Manganese (Mn) atom on the left side, so we can add a coefficient of 1 to X on the right side to balance it:
1M + 2Gc + 3Cp + 1Gc2MCp3 → 1X
Next, we can balance the Carbon (C) atoms by adding a coefficient of 3 to X:
1M + 2Gc + 3Cp + 1Gc2MCp3 → 3X
Then, we can balance the Chlorine (Cl) atoms by adding a coefficient of 3 to X:
1M + 2Gc + 3Cp + 1Gc2MCp3 → 3X3
Next, we can balance the Gadolinium (Gd) atoms by adding a coefficient of 1 to X:
1M + 2Gc + 3Cp + 1Gc2MCp3 → 3X3Gd
Finally, we can balance the Molybdenum (Mo) atoms by adding a coefficient of 2 to X:
1M + 2Gc + 3Cp + 1Gc2MCp3 → 3X3Gd2Mo
And the Copper (Cu) atoms by adding a coefficient of 3 to X:
1M + 2Gc + 3Cp + 1Gc2MCp3 → 3X3Gd2Mo3Cu
Therefore, the balanced equation is:
1M + 2Gc + 3Cp + 1Gc2MCp3 → 3X3Gd2Mo3Cu
In a balanced chemical equation, the number of atoms of each element on both sides of the equation should be equal, so 1 does not equal 7 as previously noted. However, the initial equation was unbalanced, so it did not represent a valid chemical reaction.
which physical method can be used for obtaining a sample of salt from a small breaker of salt water
Answer:
Water and salt can be separated through the process of distillation or evaporation.
Explanation:
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A ___________ sewage has a high concentration of BOD.
a
weak
b
strong
c
sanitary
d
treated
Answer:
b
Explanation:
9. Propane (C,H₂), butane (CH), and pentane (C₂H₁₂) all belong to the class of organic compounds called .... (7.1)
Propane ([tex]C_{3}H_{8}[/tex]), butane ([tex]C_{4}H_{10}[/tex]), and pentane ([tex]C_{5}H_{12}[/tex]) are all hydrocarbons and belong to the class of organic compounds called alkanes.
What are alkanes?
Alkanes are a class of organic compounds that consist of carbon and hydrogen atoms connected by single covalent bonds. They are also called saturated hydrocarbons because they contain the maximum number of hydrogen atoms possible for a given number of carbon atoms, meaning they are fully "saturated" with hydrogen atoms. The general formula for alkanes is [tex]C_{n}H_{2n+2}[/tex].
Alkanes are characterized by their physical properties such as being nonpolar, insoluble in water, and having low boiling and melting points. They are commonly found in crude oil and natural gas and are the main components of gasoline and other fuels. In addition to their use as fuels, alkanes are also used in the production of plastics, synthetic fibers, and other materials. Examples of alkanes include methane, ethane, propane, butane, pentane, and hexane.
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Complete question is: Propane ([tex]C_{3}H_{8}[/tex]), butane ([tex]C_{4}H_{10}[/tex]), and pentane ([tex]C_{5}H_{12}[/tex]) are all hydrocarbons and belong to the class of organic compounds called alkanes.
cyanate ion waste solution from gold-mining operations can be destroyed by treatment with hypochlorite ion in basic solution. Write a balanced oxidation-reduction equation for this reaction. OCN^-(aq) +OCl^-(aq) --> CO2^-(aq)+N2(g)+Cl^-(aq)+H2O(l)
The balanced oxidation-reduction equation for the destruction of cyanate ion waste solution from gold-mining operations by treatment with hypochlorite ion in basic solution is:
OCN⁻(aq) + OCl⁻(aq) + 2OH⁻(aq) → CO₂⁻(aq) + N₂(g) + Cl⁻(aq) + H₂O(l)
In this reaction, the cyanate ion (OCN⁻) is oxidized to carbon dioxide (CO₂⁻) and nitrogen gas (N₂), while the hypochlorite ion (OCl⁻) is reduced to chloride ion (Cl⁻). The reaction takes place in basic solution, which provides the hydroxide ions (OH⁻) needed to neutralize the acidic H⁺ ions produced during the oxidation of the cyanate ion.
The reaction is exothermic, releasing heat energy as the products form. This reaction is an effective way to dispose of the cyanate ion waste generated by gold-mining operations, as it converts the hazardous waste into harmless gases and ions.
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Select the correct answer. What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? A. Resistance is directly related to length. B. Resistance is directly related to the square of the length. C. Resistance is inversely related to the length. D. Resistance is inversely related to the square of the length.
Answer:
A
Explanation:
In the previous steps, you determined
that 5.0 moles Al can produce up to 2.5
moles of product and 6.0 moles O2 can
produce up to 4.0 moles of product.
Based on this information, how many
moles of Al2O3 can form when 5.0 mol Al
reacts with 6.0 mol O2?
[?] mol Al₂O3
Give your answer to two significant figures.
Moles Al:O,
Moles Al;O,
Enter
The number of moles of the Al2O3 that is produced by the reaction is 2.5 moles.
What is the stoichiometry?Stoichiometry is crucial to understanding chemical reactions because it enables us to calculate how many reactants are required to make a particular amount of product
We have the reaction equation as;
4Al + 3O2 → 2Al2O3
Then we can see that Al is the limiting reactant since it is the reactant that has given us the least amount of product. As such we have that;
4 moles of Al produces 2 moles of Al2O3
5 moles of Al will produce 5 * 2/4
= 2.5 moles
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Answer:
2.5
Explanation:
HELP HELP ITS TIMED!!!
Determine if the following compounds are A. IONIC or
B. COVALENT
1. N2 7. NaCl
2. NO2 8. MgCl2
3. CC14 9. LiBr
4. CH4 10. FeCl3
5. HF. 11. Mg3P
6. H20 12. A103
Answer:
1. N2: Covalent
2. NO2: Covalent
3. CC14: Covalent
4. CH4: Covalent
5. HF: Covalent
6. H20: Covalent
7. NaCl: Ionic
8. MgCl2: Ionic
9. LiBr: Ionic
10. FeCl3: Ionic
11. Mg3P: Ionic
12. A103: Ionic
If 455J is released by a 45.0g sample of ethanol (c= 2.44 J/g*°C), what will the temperature change be?
Answer:
We can use the formula:
Q = m * c * ΔT
where Q is the heat released, m is the mass of the sample, c is the specific heat capacity, and ΔT is the temperature change.
We are given Q = 455 J, m = 45.0 g, and c = 2.44 J/g*°C.
Substituting these values into the formula, we get:
455 J = 45.0 g * 2.44 J/g*°C * ΔT
Simplifying and solving for ΔT, we get:
ΔT = 455 J / (45.0 g * 2.44 J/g*°C)
ΔT = 455 J / 109.8 J/°C
ΔT = 4.14 °C
Therefore, the temperature change of the ethanol sample will be 4.14 °C.
78. Consider the generic reaction:
A+2B→C+3DΔH=155kJ
Determine the value of ΔH for each related reaction.
3A+6B→3C+9D
C+3D→A+2B
1/2 C+2/3D >1/2A+B
The Generic reaction is A+2B = C+3D Δ H = 155 . The value of ΔH for this will be 465 kJ.
This is exactly 3 times more, so ΔH of a = 3 ×H = 3 ×155 = 465 kJ
b) this is inverted, simply, so we must multiply by -1 since it is reversed, so H of b = -155
c) this is inverted and halved, so, -1 and 1/2 must be applied
H of C = -1 ×(155)/2 = -77.5 kJ
What is a generic reaction?A "same reaction schema," also known as a generic reaction, is a group of reactions that share the same pattern. To accurately and comprehensively represent generic reactions, we have created a hierarchical reaction pattern system.
What are the five generic reaction?General chemical reactions can be divided into five categories: combustion, single displacement, double displacement, combination or synthesis, and decomposition
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If a 2.2 L reaction vessel initially contains 720 torr of cyclopropane at 485 ∘C, how long in minutes will it take for the partial pressure of cylclopropane to drop to below 104 torr ?
Total, 7.72 minutes for the partial pressure of cyclopropane to drop to below 104 torr in the given reaction vessel.
To calculate the time it will take for the partial pressure of cyclopropane to drop to below 104 torr in a 2.2 L reaction vessel, we need to use the ideal gas law; PV = nRT
where; P = pressure of the gas
V = volume of the gas
n = number of moles of gas
R = ideal gas constant (0.0821 atm·L/mol·K)
T = temperature of gas in Kelvin
First, we need to convert the initial pressure of cyclopropane from torr to atm by dividing by 760 torr/atm:
720 torr / 760 torr/atm = 0.947 atm
Next, we can rearrange the ideal gas law to solve for time (t);
t = (P₁ - P₂) × V / (n × R × ln(P₁/P₂))
where; P1 = initial pressure of cyclopropane (0.947 atm)
P₂ = final pressure of cyclopropane (104 torr converted to atm = 0.137 atm)
V = volume of the reaction vessel (2.2 L)
n = number of moles of cyclopropane (which we need to calculate)
R = ideal gas constant (0.0821 atm·L/mol·K)
ln = natural logarithm
We can use the given temperature of 485°C to convert to Kelvin by adding 273.15;
485°C + 273.15 = 758.15 K
Now, we can calculate the number of moles of cyclopropane using the ideal gas law;
n = PV / (RT)
n = (0.947 atm) × (2.2 L) / ((0.0821 atm·L/mol·K) × (758.15 K))
n ≈ 0.111 mol
Finally, we can substitute all the values into the equation for time;
t = (0.947 atm - 0.137 atm) × (2.2 L) / ((0.111 mol) × (0.0821 atm·L/mol·K) × ln(0.947 atm / 0.137 atm))
Using a natural logarithm, we can find that ln(0.947/0.137) ≈ 1.899
t ≈ 7.72 minutes
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There are 602 sextillion, or 602,000,000,000,000,000,000,000, gas molecules in 1 mole.
Calculate the number of gas molecules in a breath at sea level. Calculate the number of
gas
molecules in a breath on a mountaintop. (Show your work.)
The average breath volume of an adult is about 500 mL at sea level and about 350 mL on a mountaintop.
At sea level:
Number of moles in one breath = volume of breath in liters/22.4 L/mol
Number of moles in one breath = 0.0005 L / 22.4 L/mol
Number of moles in one breath ≈ 0.00002 mol
Number of gas molecules in one breath = number of moles x Avogadro's number
Number of gas molecules in one breath = 0.00002 mol x 6.02 x 10^23/mol
Number of gas molecules in one breath ≈ 1.2 x 10^19 gas molecules
On a mountaintop:
Number of moles in one breath = volume of breath in liters/22.4 L/mol
Number of moles in one breath = 0.00035 L / 22.4 L/mol
Number of moles in one breath ≈ 0.000016 mol
Number of gas molecules in one breath = number of moles x Avogadro's number
Number of gas molecules in one breath = 0.000016 mol x 6.02 x 10^23/mol
Number of gas molecules in one breath ≈ 9.6 x 10^15 gas molecules
Determine if the following compounds are ionic or covalent.
Please look at the picture and help me
Answer:
Covalent
NO₂, CCl₄, CH₄, HF, H₂O, N₂
Ionic
MgCl₂, NaCl, LiBr, FeCl₃, AlO₃, Mg₃P,
Explanation:
Ionic bonds occurs between a metal and non-metal, while covalent bonds occurs between two non-metals.
Nitrogen and oxygen are non-metals, hence the bonds between nitrogen dioxide are covalent bonds. Thus, NO₂ is a covalent compound.
Same concept applies to carbon tetrachloride (CCl₄), methane (CH₄), hydrogen fluoride (HF), water (H₂O) and nitrogen (N₂).
The remaining compounds are ionic compunds. Let's take magnesium chloride (MgCl₂) as an example. Magnesium is a metal, while chlorine is a non-metal. Thus, the bonds formed between these atoms are ionic bonds.
Look at the position of the elements in the periodic table to identify which are metals or non-metals.
The fluoride in many toothpaste is tin (ll) fluoride produced by the reaction of tin and gaseous hydrogen fluoride.
Write this in a word and skeleton equation
Answer:
Word equation: Tin + Hydrogen fluoride → Tin (II) fluoride + Hydrogen gas
Skeleton equation: Sn + 2HF → SnF2 + H2
1.A rate law is an equation that mathematically describes how fast a reaction occurs.
True
False
1.The rate-determining step, rate laws, and the specific rate constant are all determined experimentally.
1.True
2.False
1./In the rate law k[NO]2[Br2], the reaction is first order for NO and second order for Br2.
1.True
2.False
1.
A reactant is not included in a rate law if a change in its concentration does not affect the reaction rate.
1.True
2.False
1.H2 (g) + F2 (g) \rightarrow 2HF (g) is an example of a(n) __________.
1.intermediate
2complex reaction
3elementary step
4rate-determining step
True. The statement "A rate law is an equation that mathematically describes how fast a reaction occurs" is true.
What is Rate of Reation?
The rate of reaction is the speed at which a chemical reaction takes place. It is a measure of how fast the reactants are consumed and the products are formed. The rate of reaction can be determined by measuring the change in concentration of a reactant or product over time. The rate of reaction is affected by several factors, including the concentration of reactants, temperature, pressure, and the presence of a catalyst.
A rate law is an equation that describes the relationship between the rate of a chemical reaction and the concentration of reactants in the reaction. The rate law helps to determine the order of the reaction with respect to each reactant, and it can be used to predict how changing the concentration of reactants will affect the rate of the reaction. The rate law can also help to determine the rate constant, which is a proportionality constant that relates the rate of the reaction to the concentration of reactants.
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For an experiment, you make a solution that is 0.500 M CaCl₂(aq). The
correct molar concentration for Ca(aq) and Cl(aq) in solution is?
The term molarity is an important method which is used to calculate the concentration of a solution. It is also known as the term molar concentration. Here molarity is given as 0.500 M.
The concept molarity is defined as the number of moles of the solute present per liter of the solution. It is represented as 'M' and its unit is mol / L. Let us take the volume as 20 L.
Then molarity = Number of moles / Volume in Liters
n = 20 × 0.500 = 10
Molar concentration of 'Ca' = 10 / 20 = 0.5
Molar concentration of 'Cl' = 2 × 0.5 = 1
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What is the empirical formula for a compound composed of 0.1502 mol of carbon (C), 0.0751 mol of hydrogen (H), and
0.0376 mol of nitrogen (N)?
Answer:
C4H2N
Explanation:
The empirical formula is the ratio of atoms in the compound. By dividing each number of moles by the smallest number of moles, we can find the ratio of each atom in relation to that smallest value.
Smallest number of moles is N, so
C: 0.1502/0.0376=4.16=4
H: 0.0751/0.0376=2.08=2
N: 0.0376/0.0376=1
Recall that we have to have integers in the empirical formula, so the ratios are rounded to the nearest whole number. With these ratios, we make the formula:
C4H2N
central atom in BrF4
The central atom in the Lewis structure is the least electronegative atom. Bromine is the less electronegative atom than Fluorine. So, Bromine will occupy the central position and four Fluorine atom will surround it.
According to Le Chatelier's principle, what happens when changes are made to a system that includes reversible chemical reactions in equilibrium?
Opposing changes will move the system farther and farther from equilibrium.
No external changes will be visible, but the system will remain in dynamic equilibrium.
No external changes will be visible because the system will remain in static equilibrium.
Opposing changes will work to bring the system back to equilibrium.
According to Le Chatelier's principle, (d) opposing changes will work to bring the system back to equilibrium.
Define equilibrium ?
In chemistry, equilibrium refers to a state in which the rates of the forward and reverse reactions in a chemical system are equal.
According to Le Chatelier's principle, opposing changes will work to bring the system back to equilibrium when changes are made to a system that includes reversible chemical reactions in equilibrium. This principle states that if a stress or change is applied to a system in equilibrium, the system will respond by shifting its equilibrium position in a way that tends to counteract the change. For example, if a reactant is added to a system in equilibrium, the system will shift to consume the added reactant by favoring the forward reaction to produce more products, thus working to bring the system back to equilibrium. Similarly, if a product is removed from the system, the system will shift to produce more of the removed product by favoring the reverse reaction, again working to bring the system back to equilibrium.
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Consider the titration of 100.0 mL of 0.100 M HCN by 0.100 M KOH at 25°C.
Ka for HCN = 6.2×10-10.
Part 1
Calculate the pH after 0.0 mL of KOH has been added.
Part 2
Calculate the pH after 50.0 mL of KOH has been added.
Part 3
Calculate the pH after 75.0 mL of KOH has been added.
Part 4
Calculate the pH at the equivalence point.
Part 5
Calculate the pH after 125 mL of KOH has been added.
Part 1: The pH of the solution before any KOH is added is the same as the pH of the HCN solution, which can be calculated using the Ka of HCN and the initial concentration: pH = -log(6.2 x 10-10) = 9.2
What is concentration?Concentration is the ability to focus on a task or activity and to block out any distractions. It involves maintaining mental focus to complete a task, retain information, and make decisions. It is important in many areas of life, from studying for an exam to work-related tasks.
Part 2: At 50 mL of KOH added, the concentration of HCN is reduced to 0.050 M and the concentration of KOH is 0.050 M. This is a 1:1 ratio, so the pH is equal to the pKa of HCN:
pH = -log(6.2 x 10-10) = 9.2
Part 3: At 75 mL of KOH added, the concentration of HCN is reduced to 0.025 M and the concentration of KOH is 0.075 M. This is a 3:1 ratio, so the pH can be calculated using the Henderson-Hasselbalch equation:
pH = pKa + log([KOH]/[HCN])
pH = 9.2 + log(3)
pH = 10.2
Part 4: At the equivalence point, the moles of KOH added is equal to the moles of HCN initially present, so the concentration of HCN is 0 and the concentration of KOH is 0.1 M. This means the pH of the solution is equal to the pOH of the solution, which can be calculated using the Ka of HCN and the initial concentration:
pOH = -log(6.2 x 10-10) = 9.2
pH = 14 - pOH
pH = 14 - 9.2 = 4.8
Part 5: At 125 mL of KOH added, the concentration of KOH is 0.125 M and the concentration of HCN is 0. This means the pH of the solution is equal to the pOH of the solution, which can be calculated using the Ka of HCN and the initial concentration:
pOH = -log(6.2 x 10-10) = 9.2
pH = 14 - pOH
pH = 14 - 9.2 = 4.8.
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I WILL GIVE YOU 35 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS PLEASE
Answer:
You need to use 81 mL of the 1.041 M NaCl solution to obtain 4.93 g of NaCl.
Explanation:
We can use the following formula to calculate the volume of a solution needed to obtain a certain amount of solute:
Volume of solution (in L) = Amount of solute (in mol) / Concentration of solution (in mol/L)
First, we need to convert the given mass of NaCl into moles:
moles of NaCl = mass of NaCl / molar mass of NaCl
moles of NaCl = 4.93 g / 58.44 g/mol
moles of NaCl = 0.0843 mol
Next, we can use the above formula to calculate the volume of the 1.041 M NaCl solution needed:
Volume of solution (in L) = moles of NaCl / concentration of NaCl solution
Volume of solution (in L) = 0.0843 mol / 1.041 mol/L
Volume of solution (in L) = 0.081 L
Finally, we can convert the volume from liters to milliliters:
Volume of solution (in mL) = 0.081 L x 1000 mL/L
Volume of solution (in mL) = 81 mL
Therefore, you need to use 81 mL of the 1.041 M NaCl solution to obtain 4.93 g of NaCl.
The oxygen-hydrogen bonds in water are polar covalent, making water a polar molecule. Which statement is true of water??
A. the hydrogen atoms in the molecule are partially positive and the oxygen is partially negative
B. the 2 hydrogens donate their electrons to oxygen
C. the hydrogens pull the shared electrons closer to themselves
D. the hydrogen atoms in the molecule are partially negative and the oxygen is partially positive
Answer: A
Explanation:
As O is more electronegative than H so O is partially negative while H is partially positive
arrangement around the central atom in BrF4
Answer:
The shape of BrF4– is square planar because the central atom Bromine is sp3d2 hybridized. The central atom Br has four bond pairs and two lone pairs present on it. The electron pair geometry of BrF4– is octahedral.
a students attempted to find the volume of a piece if wood using water displacement.The diagram below represents a graduated cylinder of water before and after the piece of wood was placed in it
The learner will not be able to determine the correct volume of this piece of wood by determining the volume of water displaced since the wood is not completely submerged in the water.
Only a section of the wood is buried in the water, as depicted in the diagram, leaving a portion of its volume above the waterline. As a result, just the volume of the wood submerged in the water, and not the full volume, is displaced by the water. The student must either fully submerge the wood in the water to determine its volume or use another technique, such as measuring the wood's dimensions and estimating its volume using the formula for the volume of a rectangular solid.
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how many grams of calcium is used in this reaction, if 15.0 g calcium oxide are produced
Answer:10.71 g
Explanation:
Please help me outttttt
The number of mole of helium inflated into the balloon is 0.031 mole
How do i determine the number of mole helium inflated?From the question given above, the following data were obtained obtained:
Volume of balloon (V) = 750 mL = 750 / 1000 = 0.75 LTemperature (T) = 20 °C = 20 + 273 = 293 KPressure (P) = STP = 1 atmGas constant (R) = 0.0821 atm.L/mol KNumber of mole (n) =?The number of mole of the helium gas inflated into the balloon can be obtained as follow:
PV = nRT
1 × 0.75 = n × 0.0821 × 293
0.75 = n × 24.0553
Divide both sides by 24.0553
n = 0.75 / 24.0553
n = 0.031 mole
Thus, we can conclude that the number of mole of the helium gas inflated into the balloon is 0.031 mole
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arrangement of central atom
Answer:
Central Atom with Four Pairs of Electrons
To maximize the distance between them, the four pairs of electrons form a shape called tetrahedral.
Balancing equations
Periodic table equations
Balancing equations
Periodic table equations
Balancing equations is an important skill in chemistry that involves making sure that the same number of atoms of each element is present on both sides of a chemical equation.
Here is an example of how to balance a chemical equation:
Let's say we have the following unbalanced equation:
Fe + O2 → Fe2O3
To balance this equation, we need to make sure that the same number of atoms of each element is present on both sides of the equation. We can do this by adjusting the coefficients in front of each molecule:
4Fe + 3O2 → 2Fe2O3
Now the equation is balanced because we have 4 atoms of Fe and 6 atoms of O on both sides of the equation.
The periodic table is a table of elements that is arranged in order of increasing atomic number. Each element is represented by a unique symbol and has a corresponding atomic number and atomic mass.
Chemical equations often involve the use of elements from the periodic table. For example, H2O represents water, which is made up of two hydrogen atoms and one oxygen atom.
When writing or balancing chemical equations, it is important to be familiar with the elements on the periodic table and their properties. This can help you to accurately represent the reactions that are taking place.
a sample of gas has a mass of 0.560 g . Its volume is 125 mL at a temperature of 85 ∘C and a pressure of 757 mmHg . Find the molar mass?
The gas's molar mass is 126 g/mol.
What is pressure?A gas, liquid, or solid's force per unit area exerted on surfaces it is in touch with is known as pressure. It is the amount of force delivered per unit area, to put it another way. The impact of the gas molecules with the container walls causes the pressure of a gas.
How do you determine it?The ideal gas law, which links the pressure (P), volume (V), temperature (T), and number of moles (n) of a gas, may be used to get the molar mass of the gas:
PV = nRT
where R is the gas universal constant.
The temperature will first be converted to kelvin (K) as follows:
T = 85 °C + 273.15 = 358.15 K
Let's now convert the pressure into atm:
757 mmHg = 757/760 atm + 0.996 atm
The ideal gas law may now be rearranged to account for the number of moles:
n = PV/RT
n= (0.996 atm)(0.125 L)/(0.0821 Latm/molK)(358.15 K)
n =0.00445 mol
Using the mass (m) and number of moles (n), we can finally determine the molar mass (M) as follows:
M = m/n
M = 0.560 g/0.00445 mol
M = 126 g/mol
As a result, the gas's molar mass is around 126 g/mol.
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