Answer:
The value of the equilibrium constant Kc is 5.45
Explanation:
The "Law of Mass Action" states:
"For a reversible reaction in chemical equilibrium at a given temperature, it is true that the product of the concentrations of the products raised to the stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients is a constant."
This constant was called the equilibrium constant. For a reaction:
aA + bB ⇄ cC + dD
the equilibrium constant Kc is:
[tex]Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }[/tex]
In this case, the balanced reaction is:
2 H₂S → 2 H₂ + S₂
So, the equilibrium constant Kc is:
[tex]Kc=\frac{[H_{2} ]^{2} *[S_{2} ] }{[H_{2} S]^{2} }[/tex]
The equilibrium concentrations are
[H₂S] =0.25 M[H₂]= 0.88 M[S₂]= 0.44MReplacing in the definition of equilibrium constant:
[tex]Kc=\frac{(0.88 M)^{2} *0.44 M }{(0.25 M)^{2} }[/tex]
Solving:
Kc= 5.45
The value of the equilibrium constant Kc is 5.45
The temperature of 200 mL of gas originally at STP is changed to –25o C at constant volume. Calculate the final pressure of the gas in mmHg.
Answer:
691.6 mmHg
Explanation:
At standard temperature and pressure, temperature of a system = 273K, and pressure= 1atm
T1= 273.15K
P1= 1atm
T2= (–25°C +273.15 )= 248.15K
From Gay-Lussac's law which expressed that at constant volume, pressure of a particular mass of gas is directly proportional to temperature . It can be expressed as
P1 / T1 = P2 / T2
Where P1= initial pressure
T2= final temperature
T1= initial temperature
P2= final pressure
Making P2 subject of the formula
P2= (P1 × T2)/ P1
Substitute the values we have
P2= (1 atm × 248.15K)/273.15
P2= 0.91 atm
But
1atm= 760 mmHg
0.91 atm= X mmHg
If we cross multiply we have
X mmHg= (760× 0.91)/1
= 691.6 mmHg
Hence, the final pressure of the gas in mmHg is 691.6 mmHg
A 4.5L container of gas has a pressure of 3.0 atm at a temperature of 100 C. The container is expanded to 6L, and the temperature is increased to 200 C.
A) 2.85 atm
B) 5.3 atm
C) 1.05 atm
D) 100 K
write a paragraph on: how Westfield how the rust in their water formed.
Answer:
Students have investigated what's going on in the fictional town of Westfield, they learned that the mysterious reddish-brown substance in the water is actually rust, which formed because of a chemical reaction between the iron pipes and the fertilizer substance in the water.
Explanation:
Convert 1.65 moles of nitrogen gas at STP to liters.
What is the coefficient of the scientific notation answer ? What is the exponent of the scientific notation answer ? How many significant figures are there in the answer ? What is the right most significant figure in the answer ?
Answer:
See explanation
Explanation:
We know that 1 mole of a gas occupies 22.4 L
Hence, 1.65 moles of nitrogen gas occupies 1.65 moles * 22.4 L/1 mole = 36.96 L or 3.696 * 10^1 L = 3.70 * 10^1 L
The exponent of the scientific notation answer = 1
The significant figures there are in the answer = 4
The right most significant figure in the answer = 2
A bottle contains 2.5 moles of KOH dissolved in water, and the molarity of the solution is 0.16 M.
What volume of solution is in this bottle?
Answer:
V = 15.6 L
Explanation:
Hello there!
In this case, according to the definition of molarity in terms of the moles of solute divided by the volume of the solution, it is possible for us to write:
[tex]M=n/V[/tex]
Thus, given the moles and concentration of the solution, we can find the volume as shown below:
V=n/M
Therefore, we plug in the given data to obtain:
V = 2.5mol /(0.16mol/L)
V = 15.6 L
Best regards!
Can you help me please
Answer:
11.5 or 11.52, depending on however many decimal places you round it to
Explanation:
the equation for mass ( using the specific heat capacity equation) is energy transferred divided by temperature change x the specific heat capacity.
so, we do 725 ÷ 32° (the temp change) x 2.03 = 11.52 or 11.5, depending on how many decimal places you round to
i would round to 2 decimal places, so the answer would be 11.52kg.
mass is measured in kg :) hope this helped.
How many moles of gas is contained in 2.21 L at STP?
Answer:
its an helium gas are contained in a 4.0L at STP? 0.17
Explanation:
because the elements in column 2.21 is what quantity of gas in holes
CSI blood drop I need help please I don’t find any answers in the episode
Hello, I need help in this part of chemistry, I need the chemical names of the following four:
1) B and F3
2) Se and I2
3) As2 and Se3
ASAP! Please,,,
Complete the following molecular models to represent balanced equations by
drawing additional molecules but not changing the identity of them. When you are
done, the total number of atoms of each element on the reactant side of the equation
must equal the total number of atoms of the same elements on the product side.
a)
Answer:
I do not know the Answer I'm just trying to get my point
Explanation:
Thank you
Which of the following is deforestation most likely to cause?
A.
an increase in the amount of soil on Earth
В.
an increase in the amount of minerals on Earth
C.
an increase in the amount of carbon dioxide in Earth's atmosphere
D
an increase in the amount of ozone in Earth's atmosphere
Answer:
C
Explanation:
trees (as well as other plants) produce carbon dioxide. deforestation is the removal of trees. this will not cause an increase in any pollutants such as ozone. ozone is made from VOCs and other harmful pollutants, and not caused by trees. tearing down trees will also not create more soil. So the answer has to be C
A sample of gas is kept at a temperature of 300 k, a volume of 1.45L, and a pressure of 3.00 kPa. How many moles of has are in the sample
Answer:
the number of moles of the gas is 0.00174 mol.
Explanation:
Given;
temperature of the, T = 300 K
volume of the gas, V = 1.45 L
Pressure of the gas, P = 3.0 kPa
The number of moles of the gas is calculated using Ideal gas equation, as follows;
PV = nRT
Where;
n is number of moles of the gas
R is the ideal gas constant, = 8.315 L.kPa/mol.K
n = PV / RT
n = (3 x 1.45) / (8.315 x 300)
n = 0.00174 mol.
Therefore, the number of moles of the gas is 0.00174 mol.
Indicate whether each statement is true or false. Drag the appropriate statements to their respective bins. the octet rule is based on the fact that filling in all s and p valence electrons in a shell gives eight electrons. compounds in which nitrogen is the central atom are frequent exceptions to the octet rule because they have too many electrons surrounding the nitrogen. boron compounds are frequent exceptions to the octet rule because they have too few electrons surrounding the boron. the si in sih4 does not follow the octet rule because hydrogen is in an unusual oxidation state.
Answer:
the octet rule is based on the fact that filling in all s and p valence electrons in a shell gives eight electrons--- True
boron compounds are frequent exceptions to the octet rule because they have too few electrons surrounding the boron......True
compounds in which nitrogen is the central atom are frequent exceptions to the octet rule because they have too many electrons surrounding the nitrogen...... false
the si in sih4 does not follow the octet rule because hydrogen is in an unusual oxidation state......false
Explanation:
The octet rule simply means that atoms tend to be stable when they have eight electrons in their outermost shell. This rule mostly applies to the s and p orbitals and not to the d and f orbitals. The sum of the total electrons in the outermost s and p orbitals is often equal to eight for an atom to be considered stable, for example, the noble gases.
Boron often forms compounds which has less than eight electrons around the boron central atom because the compounds of boron often have a sextet of electrons owing to the fact that boron is trivalent and forms mostly covalent compounds.
Nitrogen compounds mostly obey the octet rule and do not have excess electrons. The oxidation state of hydrogen in SiH4 is not unusual.
How many moles of NaCl are found in 5.2L of a 0.75 M solution?
Answer 4.45 moles
Explanation:
please help me asap. NO LINKS I WILL REPORT YOU!!!!
the galvanometer is not measuring any electricity despite all wires being hooked up. Why could this be?
Answer: you can find out information about Wheatstone bridge.
Explanation: maybe resistors are adjusted such a way that current through
Galvanometer is zero. There is no picture.
Answer:
mmh maybe the connections arent right
Explanation:
coz when u mess up even a bit current wont flow
How many moles do I have of Lithium if I have 116.3g
Answer:
16.85mol
Explanation:
The number of moles of a substance can be calculated by dividing the mass of that substance by its molecular mass. That is;
number of moles (n) = mass (m) /molar mass (MM)
Molar mass of lithium = 6.9g/mol
Hence,
number of moles = 116.3 ÷ 6.9
Moles = 16.85mol
Therefore, 16.85moles is present in 116.3g of Li.
How much did the total amount of discarded clothing and other fabrics increase from 1960
to 2018?
Answer:
Around 17,000,000 or a little more than that
Organisms are more closely related to the species that they share the most DNA with
True or False
Answer:
True
Explanation:
why does his apple tastes less sour after 15 days
Answer:
Maybe because that he ate the apple when it wasn't ready or fully grown yet just like bannans if bannanas are green that means that they are still growing so maybe that why it tasted sour or prob because he ate an green apple because thos apples are sour.
What can lead to being curious and also lead to fascinating scientific investigations? a. Questions b. Answers c. Qualitative Measurements d. Quantitative Measurements
Answer:
Questions
Explanation:
The word "science" was obtained from the Latin word "Scire" which means "to know". Hence science is a systematic investigation into the nature of the universe.
Scientific investigations begin with asking questions about the universe. It is this curiosity to know about occurrences in the universe as well as how to solve problems in the universe that leads to fascinating scientific investigations and discoveries.
PLEASE HELP ME ASAP!!!!!!!!!!!!!
DUE IN AN HOUR PLS HELP WILL SEND MONEY THRU CASHAPP
Read the temp what is it?
17.3 or 17.25??
Answer:
I would say 17.25.
Explanation:
how do you balance _KCIO3 + __P4 → _P4010 + ___KCI
A fire that is burning wood will release water vapor and carbon dioxide
true or false?
Answer:
true.
Explanation:
Describe what happens to the molecules in the ice as temperature of the ice increases
Answer:
When you heat ice, the individual molecules gain kinetic energy, but until the temperature reaches the melting point, they don't have energy to break the bonds that hold them in a crystal structure. They vibrate more quickly within their confines as you add heat, and the temperature of the ice goes up.
Answer:
As energy is transferred to the water molecules in the ice, the motion of the molecules increases. The motion of the molecules increases enough that it overcomes the attractions the water molecules have for each other causing the ice to melt.
The behavior of an organism is influenced A. only by the organism's life experiences. B. only by the organism's evolutionary history. C. by both the organism's evolutionary history and its life experiences. D. by neither the organism's evolutionary history nor its life experiences.
Definition:This is a type of lab equipment in which students use probes, interfaces, and software for real-
time data acquisition, display, and analysis with a computer or calculator
What is the term?
I need help with my science project someone help me answer it!
Answer:
food
Explanation:
Describe how ultrasonic waves help ships navigate and how ultrasonic waves can be used for medical purposes