Which energy change occurs in an operating voltaic cell?

(1) chemical to electrical

(2) electrical to chemical

(3) chemical to nuclear

(4) nuclear to chemical

How much phenol red absorbance is in the first peak?

When a car drives down a street, what evergy conversions are happening?

When aluminum oxidizes in air, it forms aluminum oxide (Al2O3): 4Al (s) + 3O2 (g) →2Al2O3 (s) A 102 g sheet of aluminum oxide formed completely in excess oxygen. How many grams of aluminum were oxidized? 27 g 51 g 54 g 102 g 54 is correct answer

The pressure at which a substance in its gaseous state can exist in equilibrium with the same substance in its liquid state at a given temperature is

Which of the following describes volume? A. The number of particles or amount of matter B. Amount of mass contained in a certain space C. How fast the particles of matter are moving D. The amount of space that matter occupies

A sample of argon gas, Ar (g). is placed in a 3.80 L container at 320 K. The gas pressure is 0.496 atm. How many moles of Ar gas are in the container?

Review It! All of the following are correct, except: a; A galaxy contains a vast number of stars, their planetary systems, and a variety of other celestial objects. b; Stars orbit the many planets of a galaxy.

Which would be most likely be the pH of a highly-corrosive acid? a) 1 b) 5 c) 8 D) 11

The unit cell of amazonite is made of three pairs of faces, each pair different from the others. The faces are oriented at angles to one another that are not 90 degrees.

An aqueous solution at 25∘C has a hydronium ion concentration of 3.2*10-9 M. What is the hydroxide ion concentration of the solution? Write your answer in scientific notation. Use the multiplication symbol rather than the letter x in your answer.