How many milligrams of a 20mg sample of cesium-137 remain after 60 years

Which reactants would lead to a spontaneous reaction? A. Cu2 + and Ag B. Ba2 + and Mn C. Ag + and Cu D. K + and Na

Recognize What do all eukaryotic cells have in common?

What form of the ideal gas law would you use to calculate the number of moles of a gas? A. T = pv nR B. n = PV RT C. v = nRT p D. p = nRT v

Describe the motion of particles of a gas according to kinetic energy

All gases listed are at the same pressure. Which gas will most closely approach ideal behaviour? A ammonia at 100K B ammonia at 500K C neon at 100K D neon at 500K tell me the answer and explain well

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?