ASAP, This question is 30 points. Please help me! 1. What jumps during an electromagnetic charge?
2. What caused the styrofoam to be attracted to the rod?
3. Which direction do magnetic field lines move?

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate