the surface of area of a small piston a is 0.01m^2, the surface area of the big piston A is 0.1m^2 and the effort is 150N, calculate the magnitude of the load F? (a)39N (b) 50N (c) 20N (d) 10N

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.