What rung of the Cosmic Distance Ladder is most appropriate for the incorrect choice/s above?
Parallax
Main sequence fitting
Variable stars
Type 1a supernovae
Hubble's Law

Theoretical temperature at which molecules stop moving and no more heat can be removed from the object. kelvin: absolute zero degrees. none of the above.

"electrical energy" transforms to "thermal energy".hope my answer has you : )

The mole ratio of hydrogen to ammonia is 3: 2.

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.