Substances that are likely to dissociate it water

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

How do dying stars contribute to the formation of planets