Argon-39 has a half-life of 269 years. how long will it take for 52.5 g of a 60.0 g sample to decay to its daughter isotope?

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

What is i fracture in the crust called when land move up, down or sideways

Why is retrograde motion an apparent motion