Answer:
Percent yield = 89.1%
Explanation:
Based on the equation:
Cl₂ + 2KI → 2KCl + I₂
1 mole of Cl₂ reacts with 2 moles of KI to produce to moles of KCl
To solve this quesiton we must find the moles of each reactant in order to find the limiting reactant. With the limiting reactant we can find the moles of KCl and the mass:
Moles Cl₂:
8x10²⁵ molecules * (1mol / 6.022x10²³ molecules) = 133 moles
Moles KI -Molar mass: 166.0028g/mol-
25g * (1mol / 166.0028g) = 0.15 moles
Here, clarely, the KI is the limiting reactant
As 2 moles of KI produce 2 moles of KCl, the moles of KCl produced are 0.15 moles. The theoretical mass is:
0.15 moles * (74.5513g / mol) =
11.2g KCl
Percent yield is: Actual yield (10.0g) / Theoretical yield (11.2g) * 100
Percent yield = 89.1%Which of the following gases effuses most rapidly?
(Atomic mass of : H = 1 g/mol, C = 12 g/mol , N = 14 , g/mol , O = 16 g/mol , Cl = 35.5 g/mol )
a.
hydrogen chloride
b.
nitrogen
c.
carbon monoxide
d.
ammonia
e.
oxygen
Answer:
C. Carbon monoxide
This is my answer tell me if wrong
Ammonia among all the gases effuses most rapidly. Therefore, the correct option is option d.
A gas can escape or flow through a small aperture into a vacuum or a region with lower pressure through a process called effusion. It is a specific kind of gas flow that takes place in those circumstances. The square root of a gas's molar mass has an inverse relationship with the rate of effusion of that gas. The gas will effuse more quickly the lower the molar mass.
The molar mass are calculated as:
a. hydrogen chloride (HCl): H (1 g/mol) + Cl (35.5 g/mol) = 36.5 g/mol
b. nitrogen (N2): N (14 g/mol) + N (14 g/mol) = 28 g/mol
c. carbon monoxide (CO): C (12 g/mol) + O (16 g/mol) = 28 g/mol
d. ammonia (NH3): N (14 g/mol) + H (1 g/mol) + H (1 g/mol) + H (1 g/mol) = 17 g/mol
e. oxygen (O2): O (16 g/mol) + O (16 g/mol) = 32 g/mol
The square root of the molar masses are given as:
a. √36.5 ≈ 6.04
b. √28 ≈ 5.29
c. √28 ≈ 5.29
d. √17 ≈ 4.12
e. √32 ≈ 5.66
Ammonia has the lowest molar mass and hence the fastest effusion rate of all the gases.
Therefore, the correct option is option d.
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$$$$$Are the properties of potassium (K) more similar to those calcium (Ca) or those of sodium (Na)? Why?
Answer: potassium and sodium have similar properties
Explanation: Na and K belong to alkali metals. Both have one electron in outer shell. Calcium has two electrons in outer shell.
energy level of diagram
Answer:
The energy level diagram is used to represent the energy states available in each atom. When an electron is in an energy state, it emits nor absorbs radiation. A photon is emitted or absorbed when an electron transitions from one energy state to another.
Explanation:
Find the empirical formula of copper oxide.
Answer:
The empirical formula of the oxide is CuO
Explanation:
Copper(II) oxide or cupric oxide is the inorganic compound with the formula CuO
If energy is transferred from a table to a block of ice moving across the table, which of the following statements is true?
a. The ice is cooler than the table.
b. The table and the ice are at thermal equilibrium.
c. Energy is being transferred from the ice to the table.
d. The ice is no longer 0°C.
Answer:
C???
Explanation:
Which of these gases will have the greatest density at the same specified temperature and pressure?
A. H2
B. CO 2
C. CCIF 3
D. C2H6
E. CF 4
Answer:
Neon
The highest density among the inert gases is of Neon (Ne). This a factual data. Thus the highest density among given options is of Ne, as all the options are of inert gases.
Explanation:
hope it helps u
FOLLOW MY ACCOUNT PLS PLS
CClF3 will have the greatest density at the same specified temperature and pressure.
• It is known that one mole of a gas under the standard temperature and pressure occupied 22.4 L of volume.
Now, the density of each of the gas under the similar condition will be,
• H2:
The molar mass is 2 and the volume is 22.4 L. The density is,
[tex]Density = \frac{mass}{volume}[/tex]
[tex]=\frac{2}{22.4} \\= 0.089 g/L[/tex]
• CO2:
The molar mass is 44 and the volume is 22.4 L. Now the density is,
[tex]= \frac{44}{22.4} \\= 1.96 g/L[/tex]
• CClF3:
The molar mass is 104.5 and the volume is 22.4 L. The density is,
[tex]=\frac{104.5}{22.4} \\= 4.665 g/L[/tex]
• C2H6:
The molar mass is 30 and the volume is 22.4 L. The density is,
[tex]= \frac{30}{22.4} \\= 1.339 g/L[/tex]
• CF4:
The molar mass is 88 and the volume is 22.4 L. The density is,
[tex]= \frac{88}{22.4} \\= 3.928 g/L[/tex]
Thus, CClF3 will have the greatest density at the same specified temperature and pressure.
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Muriatic acid is often used to remove rust. A solution of muriatic acid, HCl, reacts with Fe203 deposits on
industrial equipment. How many liters of 5.00 M HCl would be needed to react completely with 339 g
Fe203?
Answer:
2.54 L
Explanation:
Step 1: Write the balanced neutralization equation
6 HCl + Fe₂O₃ → 3 H₂O + 2 FeCl₃
Step 2: Calculate the moles corresponding to 339 g of Fe₂O₃
The molar mass of Fe₂O₃ is 159.69 g/mol.
339 g × 1 mol/159.69 g = 2.12 mol
Step 3: Calculate the moles of HCl that react with 2.12 moles of Fe₂O₃
The molar ratio of HCl to Fe₂O₃ is 6:1. The reacting moles of HCl are 6/1 × 2.12 mol = 12.7 mol
Step 4: Calculate the volume of HCl
12.7 moles are in 5.00 M (5.00 mol/L) HCl. The required volume is:
12.7 mol × 1 L/5.00 mol = 2.54 L
Naproxen (sold under the name Aleve) is a nonsteroidal anti-inflammatory drug (NSAID), and is used to treat different types of pain.
a. True
b. False
A cold object will have_ kinetic energy which means _ faster moving particles
Answer: if this is true or false, then this is false, something that is cold has slow moving particles, fast moving ones generate heat which will make it warm, this object has potential energy not kinetic.
A solution of sugar that contains the maximum amount of sugar that will dissolve is a ________ solution.
No false links plz, thanks!
(Sorry if this is confusing, it is to me too, trust me )
Answer:
A solution of sugar that contains the maximum amount of sugar that will dissolve is a saturated solution.
Explanation:
A saturated solution is a solution that contains as much solute as can dissolve in a given solvent at a given temperature.
for you the solute is sugar
Calculate the molar mass for S206[g).
Answer:
6605.3900 g/
Explanation:
PLEASE HELP !! ILL GIVE BRAINLIEST !! 100 POINTS
Answer:
b is the best in my opion
Explanation:
4 grams of N is how many moles of N?
Answer:
0.285577616426424
Explanation:
Hope this helps!
Identify the nonelectrolyte
Answer: Cl2
Explanation: ionic compounds forms cations and anions in water solution.
HI is a weak acid and forms H+ and I- ions. Cl2 is dissolved slightly in water
And stays in molecule form which can not transfer charge like cations and anions.
write the formula of the conjugate acid:
CH3CH2O-
Answer:
Acetate
Explanation:
this is what C2H3O2 stands for since i don"t remember seeing the above question sorry if i am wrong about this
The conjugate acid of CH3CH2O- is CH3CH2OH.
I can get the conjugate acid of any base by simply adding a proton to it. Usually, if i have the specie, CH3CH2O-, I will try to write the acid - base reaction.
This acid - base reaction occur as follows; CH3CH2OH + :B ⇄ HB + CH3CH2O-. Note that the specie :B refers to a base.
It is easy to see that I obtained the base CH3CH2O- by removing a proton from CH3CH2OH.
It then follows that CH3CH2OH is the conjugate acid of CH3CH2O-.
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what is the volume of a container that contains 24.0 grams of N2 gas at 328K and 0.884 atm
Answer:
Explanation:
10L
Taking into accoun the ideal gas law, The volume of a container that contains 24.0 grams of N2 gas at 328K and 0.884 atm is 26.07 L.
An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.
In this case, you know:
P= 0.884 atmV= ?n= [tex]24 gramsx\frac{1 mole}{28 grams} =[/tex] 0.857 moles (where 28 g/mole is the molar mass of N₂, that is, the amount of mass that the substance contains in one mole.)R=0.082[tex]\frac{atmL}{molK}[/tex]T= 328 KReplacing in the ideal gas law:
0.884 atm×V= 0.857 moles× 0.082[tex]\frac{atmL}{molK}[/tex] ×328 K
Solving:
[tex]V=\frac{0.857 molesx 0.082 \frac{atmL}{molK}x328 K}{0.884 atm}[/tex]
V= 26.07 L
The volume of a container that contains 24.0 grams of N2 gas at 328K and 0.884 atm is 26.07 L.
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https://brainly.com/question/4147359?referrer=searchResultsMy sporty mini van needs 19,126 kJ of energy in order to pass a fast moving street sweeper on the road. Using the following equation, determine how many grams of gasoline (C8H18) will be used up in order to make this happen. 2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O \DeltaΔH = -10,990 kJ
Answer:
[tex]m=397.6gC_8H_{18}}[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction, we can set up the heat of reaction per mole of gasoline as shown below:
[tex]\Delta H=\frac{-10,990kJ}{2molC_8H_{18}}=-5495\frac{kJ}{molC_8H_{18}}[/tex]
Now, since the total heat is obtained by multiplying the moles and heat of reaction, we can calculate the moles as shown below:
[tex]n=\frac{Q}{-\Delta H } \\\\n=\frac{19,126kJ}{-(-5495\frac{kJ}{molC_8H_{18}} )} \\\\n=3.48molC_8H_{18}}[/tex]
Finally, since the molar mass of gasoline is 114.22 g/mol, we can easily calculate the mass as follows:
[tex]m=3.48molC_8H_{18}} *\frac{114.22gC_8H_{18} }{1molmolC_8H_{18}} } \\\\m=397.6gC_8H_{18}}[/tex]
Best regards!
bank reconciliation statement , teacher , explain.
Answer:
A bank reconciliation statement is a summary of banking and business activity that reconciles an entity's bank account with its financial records. A bank reconciliation statement is a useful financial internal control tool used to thwart fraud.
If 4 moles of C2H2 react, how many moles of CO2 can be produced?
Answer:
To solve this exercise you need to know that to create CO₂ with C₂H₂ is necessary to have oxygen. So, the following balanced equation represents the reaction:
2C₂H₂(g) + 5O₂(g) → 4CO₂(g) + 2H₂O(g)
Explanation:
if all objects have gravity why aren't you pulled toward the large building when you stand near it?
I need a good answer.
Answer:
Explanation:
You actually are being pulled towards everything and everything is being pulled towards you. Everything exerts a gravitational force, but our force and the force of the objects around us is not strong enough to actually move objects
Explain the difference between a mixture of two substances and a chemical compound formed by them
Answer:
mixtures are physically combined structures that are separated into their original components. A chemical substance is composed of one type of atom or molecule. A mixture is composed of different types of atoms or molecules that are not chemically bonded.
Explain:
yw
ask your mom and your family
The chemical formula for sodium citrate is Na3C6H5O7. Which statement is true? Sodium citrate is a compound with a total of 21 atoms. Sodium citrate is an element with a total of 21 atoms. Sodium citrate is a compound with a total of 4 atoms. Sodium citrate is a compound with a total of 21 atoms, each of a different element.
Answer:
Sodium citrate is a compound with a total of 21 atoms
The meniscus that forms in a graduated cylinder is primarily due to what property of water?
Answer: Surface Tension
(Water molecules are attracted to the molecules in the wall of the glass beaker).
A chemical reaction between sodium bicarbonate and acetic acid occurs in a lab. The sum of the
reactants is 345 grams. As the chemical reaction proceeds, a gas is formed. Select the answer that best
describes the mass of the remaining solid product.
a. 345 g, same as the mass of the reactants
b. greater than 345 g
c. less than 345 g
d. none of the above
As the chemical reaction proceeds, a gas is formed with the water molecule and CH₃COONa, so the mass of the remaining solid product is less than 345 g.
What is the stoichiometry?Stoichiometry tells about the relative amount of reactants and products before and after the reaction in terms of coefficient.
Given chemical reaction is:
NaHCO₃ + CH₃COOH → CH₃COONa + CO₂ + H₂O
From the stoichiometry of the reaction it is clear that 1 mole of both the reactants will form products. And for the formation of product amounts of the reactants get wholly consumed. From 345 grams of reactants carbon dioxide gas, water and sodium acetate salt is formed, so the mass of this formed salt is less than 345 grams.
Hence, option (C) is correct i.e. less that 345g.
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DETERMINE THE MOL OF WATER NEEDED TO REACT WITH1.5 MOL OF NITROGEN DIOXIDE. 3NO2+ H20→ 2HNO3 + NO
0.25mol h2o
0.5 mol h2o
0.75 mol h2o
1.0mol h2o
Answer: 0.5 mol h2o
Explanation: Hope this help :D
What is the value of for this aqueous reaction at 298 K?
A+B↽⇀C+D
ΔG°=12.86 kJ/mol
K=
Answer:
Kc = 0.5951 (4 sig. figs.)
Explanation:
For A + B ⇄ C + D at standard thermodynamic conditions (298K, 1atm)
ΔG = ΔG° + R·T·lnQ => 0 = ΔG° + R·T·lnKc => ΔG° = - R·T·lnKc
=> lnKc = - ΔG°/R·T
ΔG° = +12.86 Kj/mol
R = 8.314 Kj/mol·K
T = 298K
lnKc = - (+12.86Kj) / (8.314Kj/mol·K)(298K) = - 0.519 mol⁻¹
Kc = e⁻⁰°⁵¹⁹ mol⁻¹ = 0.5957 mol⁻¹ (4 sig. figs.)
what are two functions of the cilia?
Answer:
- Proper urine flow by signalling the kidney cells.
- They act as mechanoreceptors or sensory receptors.
Explanation:
What happens to plates at divergent boundaries?
Answer: A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth's mantle to the surface, solidifying to create new oceanic crust. ... Two plates sliding past each other forms a transform plate boundary.
Can You please solve the question b in the photo. Will give branliest.
Answer:
Br₂ + 2e⁻ ⇄ 2Br⁻ Half reaction of reduction
2I⁻ ⇄ 2e⁻ + I₂ Half reaction of oxidation
Br₂ + 2I⁻ + 2K⁺ ⇄ I₂ + 2Br⁻ + 2K⁺
Explanation:
This is an easy redox reaction:
Br₂ + 2KI → I₂ + 2KBr
We determine the oxidation states.
0 for the elements at ground state.
K does not change the oxidation state during the reaction.
Bromine is reduced to bromide (oxidation state decreases)
and iodide is oxidized to Iodine (oxidation state increases)
Br₂ + 2e⁻ ⇄ 2Br⁻ Half reaction of reduction
2I⁻ ⇄ 2e⁻ + I₂ Half reaction of oxidation
In oxidation, electrons are released while in reduction, the electrons are gained. To make the ionic equation, we just add K⁺
So we sum both reactions
Br₂ + 2e⁻ + 2I⁻ + 2K⁺ ⇄ 2e⁻ + I₂ + 2Br⁻ + 2K⁺
We cancel the electrons on both sides of the equation:
Br₂ + 2I⁻ + 2K⁺ ⇄ I₂ + 2Br⁻ + 2K⁺
HELP ME ASAP PLEASEEEE
If 3.25 moles of Ar occupies 100.L at a certain temperature and pressure, what volume does 14.15 moles of Ar occupy?
Answer:
[tex]V_2=435.4L[/tex]
Explanation:
Hello there!
In this case, for this gas problem, we can use the Avogadro's law as a way to understand the volume-mole behavior as a directly proportional relationship:
[tex]\frac{V_2}{n_2}=\frac{V_1}{n_1}[/tex]
Thus, given the initial and final moles and the initial volume, we obtain the following final volume:
[tex]V_2=\frac{V_1n_2}{n_1} =\frac{100.L*14.15mol}{3.25mol}\\\\V_2=435.4L[/tex]
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