What volume is occupied by 12.0 moles of gas at 3.5 atm pressure and t = 40 °c? (r = 0.0821 l atm/mole k)

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)

Is a pencil falling to the floor anon contact force, a force, or a contact force

What’s the theoretical yield of solid lead