1. How many moles of each element are in 200g PbO2?
2. How many moles is 200g of PbO2?

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation