what is the ΔHr of the equation N2(g) + 3H2(g → 2NH3(g) Δ H = -91.8 KJ

Find the empirical formula of each of the following compounds. given mass or for each element in a sample of the compound 3,611 g ca; 6.389 g c1

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.