Write ONLY ONE Net ionic equation for each of the following reactions. Give state only for solids, weakly dissociated or gases. No state is required for aqueous solutions. Rules sufficient for judgment which salts are soluble or insoluble: All Na , K and NO3 - salts are well soluble. Please do any preparative work on a scratch paper, so that only ONE equation will be placed in the space highlighted in yellow. Start writing in the position of the arrow to be within yellow space.

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Tell me the iupac name of the following compounds:

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas