Antoine Lavoisier (1743-1794) montra qu'en brûlant du soufre solide dans l'air, le produit de la réaction (également solide) pesait plus lourd que le soufre solide mais que la masse gagnée était perdue par l'air. • Expliquer pourquoi cette expérience n'entre pas en contradiction avec la loi de la conservation de la masse lors d'une réaction chimique.

Amarble, a bowling ball, a basketball, and a baseball are rolling across the floor at 10 m/s. which one has the greatest kinetic energy? the marble the bowling ball the basketball the baseball

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

How does the entropy of steam compare to the entropy of ice?