Which of the following is the best description of natural selection? the struggle to exist. the change in variation of a species. survival of the fittest. overproduction of offspring.

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.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

What relationship exists between an enzyme and a catalyst?