A60.0-g sample of fermium-253 was placed in a sealed vessel 9.0 days ago. only 7.5 g of this isotope is now left. what is th
half-life of fermium-253?
3.0 days
4.5 days
17.5 days
20.0 days

Give the orbital configuration of the phosphorus (p) atom.

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).

The movement of tectonic plates and in two locations is described below: location a: tectonic played push together location b: tectonic plates push apart