Calculate the change in the standard entropy of the system, delta s degree for the synthesis of ammonia from n_2(g) and h_2(g) at 298 k: n_2(g) + 3h_2(g) rightarrow 2 nh_3(g)

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

Which statement describes james chadwick’s discovery.

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6