The division of the earth's surface into twenty-four time zones is called:

Greenwich time

Standard time

Meridian time

Clock time

The rate constant of a reaction is 4.7*10-3 s-1 at 25°C, and the activation energy is 33.6 kJ/mol. What is k at 75°C?

Why are some amino acids described as essential amino acids? A) They are the ones most used in the body. B) They can be stored in the body. C) They are the only ones needed by the body. D) They cannot be made by the body.

Does bacteria need water to live

In the solid solution of a gold ring, which component is most likely the solvent? A. iron B. silver C. gold D. oxygen

which functional group is more electronegative, amine C-NH, or alcohol C-OH, in assigning carbon environment?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

Condension occurs in the inside of your windows in Winters, why?

How can you use Hess's law to determine a reaction's enthalpy?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?