38. For a chemical reaction of the type
AB
K=2.0 and BC K=0.01
Equilibrium constant for the reaction 2C 2 A is:
A. 25
B. 50 C. 2500 D.4 x 10-

Equilibrium constant for the reaction 2C ⇔2 A is : 2500

Given

A⇔B, k = 2.0

B⇔C, k = 0.01

Required

k for 2C⇔2A

Solution

k₁ for A⇔B :(eq 1)

[tex]\tt k=\dfrac{[B]}{[A]}=2.0[/tex]

k₂ for B ⇔C :(eq 2)

[tex]\tt k=\dfrac{[C]}{[B]}=0.01[/tex]

k for 2C⇔2A :

[tex]\tt k=\dfrac{[A]^2}{[C]^2}=[\dfrac{[A]}{[C]}]^2[/tex]

k₁ x k₂ =

[tex]\tt \dfrac{[C]}{[A]}=2\times 0.01 = 0.02[/tex]

Reverse :

[tex]\tt \dfrac{[A]}{[C]}=50\rightarrow [\dfrac{[A]}{[C]}]^2=50^2=2500[/tex]

a vector is represented as a ____​

What is the correct balanced equation for the reaction of sodium with water?

The specific heat capacity of copper is 0.385 J/(gK). If 353 J of heat are added to 3.6 moles of copper at 283 K, what is the final temperature of the sample of copper?

2. In the space below, describe why it rains. Include the words that scientists use
when talking about how water changes from liquid to gas and back to liquid
again

(7th grade science question)

In baking and science, do you think it is better to measure loose solids (like flour or sugar) by volume or mass? Why?​

Do you think that it is necessary and/or important to take a multivitamin everyday to maintain optimal health? What might help you answer this question? What types of things might influence your decision to take a multivitamin every day?
What's ur opinion with explanation???????!!!!!!!!!!

PLs help mweee Ill mark brainliest

HELP true or false: if all the bonds in a molecule are polar the molecule is a polar molecule

When 1 mole of tin(IV) oxide is heated with 2 moles of hydrogen gas, 1 mole of tin metal and 2 moles of water vapor are generated. SnO2 + 2H2 → Sn + 2H2O

What is the percent composition of Diphosphorus pentachloride? Round your answers to the hundredths place.

If the density is 0.9g/cm3 and the volume is 1.5cm3 ? What is the Mass?

Atoms of elements in the same group have the same number of
. This is why they have similar chemical properties.

if you could add an explanation that would be nice too :) thanks

A car with a mass of 1,000 kg is moving at a speed of 20 m/s. What is the car's kinetic energy?

Two siblings express different eye colors. The brother has brown eyes but the sister has blue eyes. Which statement explains why the siblings express different eye color? *
The brother received genes only from his father, and the sister received genes only from her mother.
The siblings each received a different combination of genetic information from their parents.
The brother received fewer genes from his other than his sister received.

What is the formula for flow rate?

The pedigree diagram shows how a dominant trait is inherited in a family. The red circle and squares show family members with the trait. Based on the pedigree diagram, who must be heterozygous for the trait? A. The child with the trait B. The child without the trait C. Only one parent D. Both parents​

BRAINLIST!!


A river flowing through a floodplain shapes the region through the processes of weathering, erosion, and deposition. Which of the following is an example of the river forming a depositional feature?

A.
As the water's speed increases, it scours deep grooves in the muddy river bottom.
B.
As the water flows along the outside edge of a curve, it removes rock and soil from the river bank.
C.
As the water's speed decreases along the inside edge of a curve, sediment is laid down to form a point bar.
D.
all of these

What are the atomic and mass numbers for the periodic table of elements

What is the name for this? Please help !!!!!!

Atoms of which two elements have a combined total of 23 protons?
A.Sodium, Na, and magnesium, Mg
B.Boron, B, and carbon, C
C.Copper, Cu, and zinc, Zn
D.None of these

ILL MARK AS BRAINLESS PLS HELP

1. If a cell has waste it needs to store, it will store it:​

Which of the following statements is true? Chemical reactions are the same as atomic reactions. The sun uses nuclear fusion reactions to generate heat. Nuclear power can't be used to do beneficial work. Nuclear fission is more dangerous than nuclear fusion.

Car 1 has a body made from aluminium and car 2 has a body made from steel. Which car is likely to
have the better fuel economy?​

"I Need Help With HomeWork"?
When A King Looses His Queen He Looses Control And I Just Don't Know What To Do Anymore I'm So Lost Without Her I Just Feel Like Giving Up On Everything

Determine Laminar flow

1. Electronegativities of the elements Be, Mg, Ca, and Sr follow a specific trend within their group. Based on this trend, the atoms of which element will have the least attraction for an electron?
A) Be.
B) Mg.
C) Ca.
D) Sr.

2. Which element has a larger atomic radius than sulfur?
A) Chlorine.
B) Cadmium.
C) Fluorine.
D) Oxygen.

3. Which ion was formed by providing the second ionization energy to remove an electron?
A) Ca2+.
B) N3–.
C) Fe3+.
D) S2–.

4. The most negative electron affinity is most likely associated with which type of atoms?
A) Large nonmetal atoms.
B) Small nonmetal atoms.
C) Large metal atoms.
D) Small metal atoms.

5. Selected properties of antimony (Sb) and iodine (I) are listed in the table below.

Element AtomRadius(pm) 1st IonEnergy(kJ/mol) ElectroAffinity(kJ/mol) Electronegative
Sb 145 ? –103 2.05
I 140 1008 –295 ?

Which predictions can most likely be made?
Sb has a lower ionization energy but a higher electronegativity than I.
Sb has a higher ionization energy but a lower electronegativity than I.
Sb has a lower ionization energy and a lower electronegativity than I.
Sb has a higher ionization energy and a higher electronegativity than I.

6. Which correctly summarizes the trend in electron affinity?
A) It tends to be very high for group 2.
B) It tends to be more negative across a period.
C) It tends to remain the same across periods.
D) It tends to be more negative down a group.

7. Which explains the change in ionization energy that occurs between removing the first and second electrons from an atom?
A) The ionization energy decreases because the ratio of the protons to electrons increases.
B) The ionization energy increases because the ratio of the protons to electrons increases.
C) The ionization energy decreases because the ratio of the protons to electrons decreases.
D) The ionization energy increases because the ratio of the protons to electrons decreases.

8. Which element would most likely have an electron affinity measuring closest to zero?
A) Na.
B) Al.
C) Rb.
D) Ar.

9. Electronegativities of the elements Na, Al, P, and Cl follow a specific trend across the period. Based on this trend, an electron will be most strongly attracted to
A) Na.
B) Al.
C) P.
D) Cl.

10. Which best describes ionization energy?
A) Energy needed to add an electron to a neutral atom in the gas phase.
B) Energy needed to add an electron to a neutral atom in the liquid phase.
C) Energy needed to remove an electron from an atom or ion in the gas phase.
D) Energy needed to remove an electron from an atom or ion in the liquid phase.

с
e reader.savvasrealize.com
60.5% + 39.7% = 100%
A compound is formed when 9.03 g
Mg combines completely with 3.48 g
N. What is the percent composition
of this compound?

9

A 75 gram sample of water is initially at 30 degrees Celsius. What would it's temperature be if
it absorbed 2000 J of heat?