Which substance represents a compound?

1. C (s)

2. Co (s)

3. CO (g)

4. O2 (g)

Which salt is least soluble in water at 20c

How can the rate of a reaction be decreased

Elements in the same group have similar properties because they have the same number of?

How do carbon-12 and carbon-13 differ? Select all that apply. They have different amounts of neutrons. They have different atomic charges. They have different mass numbers. They have different amounts of electrons.

Which is an example of a voltaic cell? a battery electrolysis of water electroplating of chrome a rechargeable battery

What is the difference between potassium 39, 41, and 40

What is physical chemistry?

Which of the following happens during a solar eclipse? The moon appears red. The moon casts a shadow on Earth. Earth, the moon, and the sun form a triangle. Earth comes between the sun and the moon.

The four elements comprising over 90 of living matter are

Consider the gas-phase reaction, n2 (g) + 3 h2 (g) 2 nh3 (g), for which kp = 43 at 400 k. if the mixture is analyzed and found to contain 2.0 bar of n2, 2.0 bar of h2 and 27.0 bar of nh3, describe the situation: