Balance the equation, if necessary, for the reaction between magnesium sulfate & ammonia. show your work. 1 needed mgso4 + nh4oh (nh4)2so4 + mg(oh)2

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

State one important difference between a physical change and a chemical change?