For the following reaction

2 R (g) - -> Q (g)

if the equilibrium concentration of R is 0.776 M and that of Q is 1.22 M at 25? C, what is the value of the equilibrium constant at this temperature?

a. 0.521

b. 0.494

c. 2.03

d. 1.57

Why do sunspots appear darker than their surroundings? A. They are masked by dust and gas passing between Earth and the Sun. B. They are warmer than their surrounding environment. C. They are cooler than their surrounding environment. D.

What kind of reaction is used for electroplating answers?

Drag each label to the correct category. Systems are classified as human-made or natural. Match each example to the correct type of system.

The joule is an SI unit of energy that is equal to 1 kg•m2/s2. The erg is a different unit of energy that is equal to 1 g•cm2/s2. How many ergs are in one joule? Use dimensional analysis to solve this problem.

Atoms form chemical bonds to satisfy what rule

How does a solid turn into a liquid

What does the Ka represent in the equation and why is it important?

Is an american alligator a autotroph?

A/1 * B/C = D, You find yourself with 17 guilders (a gold coin) but you are planning on taking a trip to a country where the local currency is the florin. The current exchange rate is 2 guilders for every 3 florins.

The burning of wood in a fireplace generates heat and light in the form of flames. Which of the following terms best describes this type of reaction? a. condensation reaction b. exergonic reaction c. endergonic reaction d.