What is the half-life of a radioisotope if a 20-g sample becomes 10 g after 16
hours?

Does the energy in a solid increase or decrease when changing to a liquid?

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2

What energy is it when you flip on a switch on a lamp